platform/kernel/linux-exynos.git
5 years agomm: don't miss the last page because of round-off error
Roman Gushchin [Fri, 26 Oct 2018 22:03:27 +0000 (15:03 -0700)]
mm: don't miss the last page because of round-off error

commit 68600f623d69da428c6163275f97ca126e1a8ec5 upstream.

I've noticed, that dying memory cgroups are often pinned in memory by a
single pagecache page.  Even under moderate memory pressure they sometimes
stayed in such state for a long time.  That looked strange.

My investigation showed that the problem is caused by applying the LRU
pressure balancing math:

  scan = div64_u64(scan * fraction[lru], denominator),

where

  denominator = fraction[anon] + fraction[file] + 1.

Because fraction[lru] is always less than denominator, if the initial scan
size is 1, the result is always 0.

This means the last page is not scanned and has
no chances to be reclaimed.

Fix this by rounding up the result of the division.

In practice this change significantly improves the speed of dying cgroups
reclaim.

[guro@fb.com: prevent double calculation of DIV64_U64_ROUND_UP() arguments]
Link: http://lkml.kernel.org/r/20180829213311.GA13501@castle
Link: http://lkml.kernel.org/r/20180827162621.30187-3-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoubifs: Handle re-linking of inodes correctly while recovery
Richard Weinberger [Wed, 26 Dec 2018 12:32:11 +0000 (13:32 +0100)]
ubifs: Handle re-linking of inodes correctly while recovery

commit e58725d51fa8da9133f3f1c54170aa2e43056b91 upstream.

UBIFS's recovery code strictly assumes that a deleted inode will never
come back, therefore it removes all data which belongs to that inode
as soon it faces an inode with link count 0 in the replay list.
Before O_TMPFILE this assumption was perfectly fine. With O_TMPFILE
it can lead to data loss upon a power-cut.

Consider a journal with entries like:
0: inode X (nlink = 0) /* O_TMPFILE was created */
1: data for inode X /* Someone writes to the temp file */
2: inode X (nlink = 0) /* inode was changed, xattr, chmod, … */
3: inode X (nlink = 1) /* inode was re-linked via linkat() */

Upon replay of entry #2 UBIFS will drop all data that belongs to inode X,
this will lead to an empty file after mounting.

As solution for this problem, scan the replay list for a re-link entry
before dropping data.

Fixes: 474b93704f32 ("ubifs: Implement O_TMPFILE")
Cc: stable@vger.kernel.org # 4.9-4.18
Cc: Russell Senior <russell@personaltelco.net>
Cc: Rafał Miłecki <zajec5@gmail.com>
Reported-by: Russell Senior <russell@personaltelco.net>
Reported-by: Rafał Miłecki <zajec5@gmail.com>
Tested-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Richard Weinberger <richard@nod.at>
[rmilecki: update ubifs_assert() calls to compile with 4.18 and older]
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit e58725d51fa8da9133f3f1c54170aa2e43056b91)
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi: imx: mx51-ecspi: Move some initialisation to prepare_message hook.
Uwe Kleine-König [Sun, 23 Dec 2018 21:21:22 +0000 (22:21 +0100)]
spi: imx: mx51-ecspi: Move some initialisation to prepare_message hook.

The relevant difference between prepare_message and config is that the
former is run before the CS signal is asserted. So the polarity of the
CLK line must be configured in prepare_message as an edge generated by
config might already result in a latch of the MOSI line.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
[ukleinek: backport to v4.14.x]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi: imx: add a device specific prepare_message callback
Uwe Kleine-König [Sun, 23 Dec 2018 21:21:21 +0000 (22:21 +0100)]
spi: imx: add a device specific prepare_message callback

This is just preparatory work which allows to move some initialisation
that currently is done in the per transfer hook .config to an earlier
point in time in the next few patches. There is no change in behaviour
introduced by this patch.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
[ukleinek: backport to v4.14.x]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoiwlwifi: add new cards for 9560, 9462, 9461 and killer series
Ihab Zhaika [Tue, 31 Jul 2018 06:53:09 +0000 (09:53 +0300)]
iwlwifi: add new cards for 9560, 9462, 9461 and killer series

commit f108703cb5f199d0fc98517ac29a997c4c646c94 upstream.

add few PCI ID'S for 9560, 9462, 9461 and killer series.

Cc: stable@vger.kernel.org
Signed-off-by: Ihab Zhaika <ihab.zhaika@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoiwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares
Emmanuel Grumbach [Fri, 14 Dec 2018 16:30:22 +0000 (18:30 +0200)]
iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares

commit eca1e56ceedd9cc185eb18baf307d3ff2e4af376 upstream.

Old firmware versions don't support this command. Sending it
to any firmware before -41.ucode will crash the firmware.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=201975

Fixes: 66e839030fd6 ("iwlwifi: fix wrong WGDS_WIFI_DATA_SIZE")
CC: <stable@vger.kernel.org> #4.19+
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agopanic: avoid deadlocks in re-entrant console drivers
Sergey Senozhatsky [Thu, 25 Oct 2018 10:10:36 +0000 (19:10 +0900)]
panic: avoid deadlocks in re-entrant console drivers

commit c7c3f05e341a9a2bd1a92993d4f996cfd6e7348e upstream.

From printk()/serial console point of view panic() is special, because
it may force CPU to re-enter printk() or/and serial console driver.
Therefore, some of serial consoles drivers are re-entrant. E.g. 8250:

serial8250_console_write()
{
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
...
}

panic() does set oops_in_progress via bust_spinlocks(1), so in theory
we should be able to re-enter serial console driver from panic():

CPU0
<NMI>
uart_console_write()
serial8250_console_write() // if (oops_in_progress)
//    spin_trylock_irqsave()
call_console_drivers()
console_unlock()
console_flush_on_panic()
bust_spinlocks(1) // oops_in_progress++
panic()
<NMI/>
spin_lock_irqsave(&port->lock, flags)   // spin_lock_irqsave()
serial8250_console_write()
call_console_drivers()
console_unlock()
printk()
...

However, this does not happen and we deadlock in serial console on
port->lock spinlock. And the problem is that console_flush_on_panic()
called after bust_spinlocks(0):

void panic(const char *fmt, ...)
{
bust_spinlocks(1);
...
bust_spinlocks(0);
console_flush_on_panic();
...
}

bust_spinlocks(0) decrements oops_in_progress, so oops_in_progress
can go back to zero. Thus even re-entrant console drivers will simply
spin on port->lock spinlock. Given that port->lock may already be
locked either by a stopped CPU, or by the very same CPU we execute
panic() on (for instance, NMI panic() on printing CPU) the system
deadlocks and does not reboot.

Fix this by removing bust_spinlocks(0), so oops_in_progress is always
set in panic() now and, thus, re-entrant console drivers will trylock
the port->lock instead of spinning on it forever, when we call them
from console_flush_on_panic().

Link: http://lkml.kernel.org/r/20181025101036.6823-1-sergey.senozhatsky@gmail.com
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Wang <wonderfly@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: linux-serial@vger.kernel.org
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agox86/mtrr: Don't copy uninitialized gentry fields back to userspace
Colin Ian King [Tue, 18 Dec 2018 17:29:56 +0000 (17:29 +0000)]
x86/mtrr: Don't copy uninitialized gentry fields back to userspace

commit 32043fa065b51e0b1433e48d118821c71b5cd65d upstream.

Currently the copy_to_user of data in the gentry struct is copying
uninitiaized data in field _pad from the stack to userspace.

Fix this by explicitly memset'ing gentry to zero, this also will zero any
compiler added padding fields that may be in struct (currently there are
none).

Detected by CoverityScan, CID#200783 ("Uninitialized scalar variable")

Fixes: b263b31e8ad6 ("x86, mtrr: Use explicit sizing and padding for the 64-bit ioctls")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Tyler Hicks <tyhicks@canonical.com>
Cc: security@kernel.org
Link: https://lkml.kernel.org/r/20181218172956.1440-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoDrivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
Dexuan Cui [Thu, 13 Dec 2018 16:35:43 +0000 (16:35 +0000)]
Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels

commit fc96df16a1ce80cbb3c316ab7d4dc8cd5c2852ce upstream.

Before 98f4c651762c, we returned zeros for unopened channels.
With 98f4c651762c, we started to return random on-stack values.

We'd better return -EINVAL instead.

Fixes: 98f4c651762c ("hv: move ringbuffer bus attributes to dev_groups")
Cc: stable@vger.kernel.org
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoKVM: Fix UAF in nested posted interrupt processing
Cfir Cohen [Tue, 18 Dec 2018 16:18:41 +0000 (08:18 -0800)]
KVM: Fix UAF in nested posted interrupt processing

commit c2dd5146e9fe1f22c77c1b011adf84eea0245806 upstream.

nested_get_vmcs12_pages() processes the posted_intr address in vmcs12. It
caches the kmap()ed page object and pointer, however, it doesn't handle
errors correctly: it's possible to cache a valid pointer, then release
the page and later dereference the dangling pointer.

I was able to reproduce with the following steps:

1. Call vmlaunch with valid posted_intr_desc_addr but an invalid
MSR_EFER. This causes nested_get_vmcs12_pages() to cache the kmap()ed
pi_desc_page and pi_desc. Later the invalid EFER value fails
check_vmentry_postreqs() which fails the first vmlaunch.

2. Call vmlanuch with a valid EFER but an invalid posted_intr_desc_addr
(I set it to 2G - 0x80). The second time we call nested_get_vmcs12_pages
pi_desc_page is unmapped and released and pi_desc_page is set to NULL
(the "shouldn't happen" clause). Due to the invalid
posted_intr_desc_addr, kvm_vcpu_gpa_to_page() fails and
nested_get_vmcs12_pages() returns. It doesn't return an error value so
vmlaunch proceeds. Note that at this time we have a dangling pointer in
vmx->nested.pi_desc and POSTED_INTR_DESC_ADDR in L0's vmcs.

3. Issue an IPI in L2 guest code. This triggers a call to
vmx_complete_nested_posted_interrupt() and pi_test_and_clear_on() which
dereferences the dangling pointer.

Vulnerable code requires nested and enable_apicv variables to be set to
true. The host CPU must also support posted interrupts.

Fixes: 5e2f30b756a37 "KVM: nVMX: get rid of nested_get_page()"
Cc: stable@vger.kernel.org
Reviewed-by: Andy Honig <ahonig@google.com>
Signed-off-by: Cfir Cohen <cfir@google.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agokvm: x86: Add AMD's EX_CFG to the list of ignored MSRs
Eduardo Habkost [Tue, 18 Dec 2018 00:34:18 +0000 (22:34 -0200)]
kvm: x86: Add AMD's EX_CFG to the list of ignored MSRs

commit 0e1b869fff60c81b510c2d00602d778f8f59dd9a upstream.

Some guests OSes (including Windows 10) write to MSR 0xc001102c
on some cases (possibly while trying to apply a CPU errata).
Make KVM ignore reads and writes to that MSR, so the guest won't
crash.

The MSR is documented as "Execution Unit Configuration (EX_CFG)",
at AMD's "BIOS and Kernel Developer's Guide (BKDG) for AMD Family
15h Models 00h-0Fh Processors".

Cc: stable@vger.kernel.org
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoposix-timers: Fix division by zero bug
Thomas Gleixner [Mon, 17 Dec 2018 12:31:05 +0000 (13:31 +0100)]
posix-timers: Fix division by zero bug

commit 0e334db6bb4b1fd1e2d72c1f3d8f004313cd9f94 upstream.

The signal delivery path of posix-timers can try to rearm the timer even if
the interval is zero. That's handled for the common case (hrtimer) but not
for alarm timers. In that case the forwarding function raises a division by
zero exception.

The handling for hrtimer based posix timers is wrong because it marks the
timer as active despite the fact that it is stopped.

Move the check from common_hrtimer_rearm() to posixtimer_rearm() to cure
both issues.

Reported-by: syzbot+9d38bedac9cc77b8ad5e@syzkaller.appspotmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: sboyd@kernel.org
Cc: stable@vger.kernel.org
Cc: syzkaller-bugs@googlegroups.com
Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1812171328050.1880@nanos.tec.linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agogpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers
Hans de Goede [Wed, 28 Nov 2018 16:57:55 +0000 (17:57 +0100)]
gpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers

commit e59f5e08ece1060073d92c66ded52e1f2c43b5bb upstream.

Commit 78d3a92edbfb ("gpiolib-acpi: Register GpioInt ACPI event handlers
from a late_initcall") deferred the entire acpi_gpiochip_request_interrupt
call for each event resource.

This means it also delays the gpiochip_request_own_desc(..., "ACPI:Event")
call. This is a problem if some AML code reads the GPIO pin before we
run the deferred acpi_gpiochip_request_interrupt, because in that case
acpi_gpio_adr_space_handler() will already have called
gpiochip_request_own_desc(..., "ACPI:OpRegion") causing the call from
acpi_gpiochip_request_interrupt to fail with -EBUSY and we will fail to
register an event handler.

acpi_gpio_adr_space_handler is prepared for acpi_gpiochip_request_interrupt
already having claimed the pin, but the other way around does not work.

One example of a problem this causes, is the event handler for the OTG
ID pin on a Prowise PT301 tablet not registering, keeping the port stuck
in whatever mode it was in during boot and e.g. only allowing charging
after a reboot.

This commit fixes this by only deferring the request_irq call and the
initial run of edge-triggered IRQs instead of deferring all of
acpi_gpiochip_request_interrupt.

Cc: stable@vger.kernel.org
Fixes: 78d3a92edbfb ("gpiolib-acpi: Register GpioInt ACPI event ...")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agogpio: max7301: fix driver for use with CONFIG_VMAP_STACK
Christophe Leroy [Fri, 7 Dec 2018 13:07:55 +0000 (13:07 +0000)]
gpio: max7301: fix driver for use with CONFIG_VMAP_STACK

commit abf221d2f51b8ce7b9959a8953f880a8b0a1400d upstream.

spi_read() and spi_write() require DMA-safe memory. When
CONFIG_VMAP_STACK is selected, those functions cannot be used
with buffers on stack.

This patch replaces calls to spi_read() and spi_write() by
spi_write_then_read() which doesn't require DMA-safe buffers.

Fixes: 0c36ec314735 ("gpio: gpio driver for max7301 SPI GPIO expander")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agommc: omap_hsmmc: fix DMA API warning
Russell King [Tue, 11 Dec 2018 14:41:31 +0000 (14:41 +0000)]
mmc: omap_hsmmc: fix DMA API warning

commit 0b479790684192ab7024ce6a621f93f6d0a64d92 upstream.

While booting with rootfs on MMC, the following warning is encountered
on OMAP4430:

omap-dma-engine 4a056000.dma-controller: DMA-API: mapping sg segment longer than device claims to support [len=69632] [max=65536]

This is because the DMA engine has a default maximum segment size of 64K
but HSMMC sets:

        mmc->max_blk_size = 512;       /* Block Length at max can be 1024 */
        mmc->max_blk_count = 0xFFFF;    /* No. of Blocks is 16 bits */
        mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
        mmc->max_seg_size = mmc->max_req_size;

which ends up telling the block layer that we support a maximum segment
size of 65535*512, which exceeds the advertised DMA engine capabilities.

Fix this by clamping the maximum segment size to the lower of the
maximum request size and of the DMA engine device used for either DMA
channel.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agommc: core: Use a minimum 1600ms timeout when enabling CACHE ctrl
Ulf Hansson [Mon, 10 Dec 2018 16:52:38 +0000 (17:52 +0100)]
mmc: core: Use a minimum 1600ms timeout when enabling CACHE ctrl

commit e3ae3401aa19432ee4943eb0bbc2ec704d07d793 upstream.

Some eMMCs from Micron have been reported to need ~800 ms timeout, while
enabling the CACHE ctrl after running sudden power failure tests. The
needed timeout is greater than what the card specifies as its generic CMD6
timeout, through the EXT_CSD register, hence the problem.

Normally we would introduce a card quirk to extend the timeout for these
specific Micron cards. However, due to the rather complicated debug process
needed to find out the error, let's simply use a minimum timeout of 1600ms,
the double of what has been reported, for all cards when enabling CACHE
ctrl.

Reported-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Reported-by: Andreas Dannenberg <dannenberg@ti.com>
Reported-by: Faiz Abbas <faiz_abbas@ti.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agommc: core: Allow BKOPS and CACHE ctrl even if no HPI support
Ulf Hansson [Mon, 10 Dec 2018 16:52:37 +0000 (17:52 +0100)]
mmc: core: Allow BKOPS and CACHE ctrl even if no HPI support

commit ba9f39a785a9977e72233000711ef1eb48203551 upstream.

In commit 5320226a0512 ("mmc: core: Disable HPI for certain Hynix eMMC
cards"), then intent was to prevent HPI from being used for some eMMC
cards, which didn't properly support it. However, that went too far, as
even BKOPS and CACHE ctrl became prevented. Let's restore those parts and
allow BKOPS and CACHE ctrl even if HPI isn't supported.

Fixes: 5320226a0512 ("mmc: core: Disable HPI for certain Hynix eMMC cards")
Cc: Pratibhasagar V <pratibha@codeaurora.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agommc: core: Reset HPI enabled state during re-init and in case of errors
Ulf Hansson [Mon, 10 Dec 2018 16:52:36 +0000 (17:52 +0100)]
mmc: core: Reset HPI enabled state during re-init and in case of errors

commit a0741ba40a009f97c019ae7541dc61c1fdf41efb upstream.

During a re-initialization of the eMMC card, we may fail to re-enable HPI.
In these cases, that isn't properly reflected in the card->ext_csd.hpi_en
bit, as it keeps being set. This may cause following attempts to use HPI,
even if's not enabled. Let's fix this!

Fixes: eb0d8f135b67 ("mmc: core: support HPI send command")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoscsi: sd: use mempool for discard special page
Jens Axboe [Wed, 12 Dec 2018 13:46:55 +0000 (06:46 -0700)]
scsi: sd: use mempool for discard special page

commit 61cce6f6eeced5ddd9cac55e807fe28b4f18c1ba upstream.

When boxes are run near (or to) OOM, we have a problem with the discard
page allocation in sd. If we fail allocating the special page, we return
busy, and it'll get retried. But since ordering is honored for dispatch
requests, we can keep retrying this same IO and failing. Behind that IO
could be requests that want to free memory, but they never get the
chance. This means you get repeated spews of traces like this:

[1201401.625972] Call Trace:
[1201401.631748]  dump_stack+0x4d/0x65
[1201401.639445]  warn_alloc+0xec/0x190
[1201401.647335]  __alloc_pages_slowpath+0xe84/0xf30
[1201401.657722]  ? get_page_from_freelist+0x11b/0xb10
[1201401.668475]  ? __alloc_pages_slowpath+0x2e/0xf30
[1201401.679054]  __alloc_pages_nodemask+0x1f9/0x210
[1201401.689424]  alloc_pages_current+0x8c/0x110
[1201401.699025]  sd_setup_write_same16_cmnd+0x51/0x150
[1201401.709987]  sd_init_command+0x49c/0xb70
[1201401.719029]  scsi_setup_cmnd+0x9c/0x160
[1201401.727877]  scsi_queue_rq+0x4d9/0x610
[1201401.736535]  blk_mq_dispatch_rq_list+0x19a/0x360
[1201401.747113]  blk_mq_sched_dispatch_requests+0xff/0x190
[1201401.758844]  __blk_mq_run_hw_queue+0x95/0xa0
[1201401.768653]  blk_mq_run_work_fn+0x2c/0x30
[1201401.777886]  process_one_work+0x14b/0x400
[1201401.787119]  worker_thread+0x4b/0x470
[1201401.795586]  kthread+0x110/0x150
[1201401.803089]  ? rescuer_thread+0x320/0x320
[1201401.812322]  ? kthread_park+0x90/0x90
[1201401.820787]  ? do_syscall_64+0x53/0x150
[1201401.829635]  ret_from_fork+0x29/0x40

Ensure that the discard page allocation has a mempool backing, so we
know we can make progress.

Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: serial: option: add Telit LN940 series
Jörgen Storvist [Thu, 13 Dec 2018 16:32:08 +0000 (17:32 +0100)]
USB: serial: option: add Telit LN940 series

commit 28a86092b1753b802ef7e3de8a4c4a69a9c1bb03 upstream.

Added USB serial option driver support for Telit LN940 series cellular
modules. Covering both QMI and MBIM modes.

usb-devices output (0x1900):
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 21 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1bc7 ProdID=1900 Rev=03.10
S:  Manufacturer=Telit
S:  Product=Telit LN940 Mobile Broadband
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option

usb-devices output (0x1901):
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 20 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1bc7 ProdID=1901 Rev=03.10
S:  Manufacturer=Telit
S:  Product=Telit LN940 Mobile Broadband
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim

Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: serial: option: add Fibocom NL668 series
Jörgen Storvist [Wed, 12 Dec 2018 20:47:36 +0000 (21:47 +0100)]
USB: serial: option: add Fibocom NL668 series

commit 30360224441ce89a98ed627861e735beb4010775 upstream.

Added USB serial option driver support for Fibocom NL668 series cellular
modules. Reserved USB endpoints 4, 5 and 6 for network + ADB interfaces.

usb-devices output (QMI mode)
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 16 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1508 ProdID=1001 Rev=03.18
S:  Manufacturer=Nodecom NL668 Modem
S:  Product=Nodecom NL668-CN Modem
S:  SerialNumber=
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)

usb-devices output (ECM mode)
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 17 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1508 ProdID=1001 Rev=03.18
S:  Manufacturer=Nodecom NL668 Modem
S:  Product=Nodecom NL668-CN Modem
S:  SerialNumber=
C:  #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I:  If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I:  If#= 6 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)

Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)
Jörgen Storvist [Wed, 12 Dec 2018 07:39:39 +0000 (08:39 +0100)]
USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)

commit cc6730df08a291e51e145bc65e24ffb5e2f17ab6 upstream.

Added USB serial option driver support for Simcom SIM7500/SIM7600 series
cellular modules exposing MBIM interface (VID 0x1e0e,PID 0x9003)

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 14 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1e0e ProdID=9003 Rev=03.18
S:  Manufacturer=SimTech, Incorporated
S:  Product=SimTech, Incorporated
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 7 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 5 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#= 6 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim

Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: serial: option: add HP lt4132
Tore Anderson [Sat, 8 Dec 2018 18:05:12 +0000 (19:05 +0100)]
USB: serial: option: add HP lt4132

commit d57ec3c83b5153217a70b561d4fb6ed96f2f7a25 upstream.

The HP lt4132 is a rebranded Huawei ME906s-158 LTE modem.

The interface with protocol 0x16 is "CDC ECM & NCM" according to the *.inf
files included with the Windows driver. Attaching the option driver to it
doesn't result in a /dev/ttyUSB* device being created, so I've excluded it.
Note that it is also excluded for corresponding Huawei-branded devices, cf.
commit d544db293a44 ("USB: support new huawei devices in option.c").

T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=02 Dev#=  3 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=ff MxPS=64 #Cfgs=  3
P:  Vendor=03f0 ProdID=a31d Rev=01.02
S:  Manufacturer=HP Inc.
S:  Product=HP lt4132 LTE/HSPA+ 4G Module
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=2mA
I:  If#=0x0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=06 Prot=10 Driver=option
I:  If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=13 Driver=option
I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=12 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=06 Prot=16 Driver=(none)
I:  If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=14 Driver=option
I:  If#=0x5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=1b Driver=option

T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=02 Dev#=  3 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=ff MxPS=64 #Cfgs=  3
P:  Vendor=03f0 ProdID=a31d Rev=01.02
S:  Manufacturer=HP Inc.
S:  Product=HP lt4132 LTE/HSPA+ 4G Module
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 7 Cfg#= 2 Atr=a0 MxPwr=2mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I:  If#=0x1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=06 Prot=00 Driver=cdc_ether
I:  If#=0x2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=06 Prot=10 Driver=option
I:  If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=13 Driver=option
I:  If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=12 Driver=option
I:  If#=0x5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=14 Driver=option
I:  If#=0x6 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=1b Driver=option

T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=02 Dev#=  3 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=ff MxPS=64 #Cfgs=  3
P:  Vendor=03f0 ProdID=a31d Rev=01.02
S:  Manufacturer=HP Inc.
S:  Product=HP lt4132 LTE/HSPA+ 4G Module
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 3 Cfg#= 3 Atr=a0 MxPwr=2mA
I:  If#=0x0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#=0x1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=06 Prot=14 Driver=option

Signed-off-by: Tore Anderson <tore@fud.no>
Cc: stable@vger.kernel.org
[ johan: drop id defines ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: serial: option: add GosunCn ZTE WeLink ME3630
Jörgen Storvist [Tue, 11 Dec 2018 17:28:28 +0000 (18:28 +0100)]
USB: serial: option: add GosunCn ZTE WeLink ME3630

commit 70a7444c550a75584ffcfae95267058817eff6a7 upstream.

Added USB serial option driver support for GosunCn ZTE WeLink ME3630
series cellular modules for USB modes ECM/NCM and MBIM.

usb-devices output MBIM mode:
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 10 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=19d2 ProdID=0602 Rev=03.18
S:  Manufacturer=Android
S:  Product=Android
S:  SerialNumber=
C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#= 4 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim

usb-devices output ECM/NCM mode:
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 11 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=19d2 ProdID=1476 Rev=03.18
S:  Manufacturer=Android
S:  Product=Android
S:  SerialNumber=
C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
I:  If#= 4 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether

Signed-off-by: Jörgen Storvist <jorgen.storvist@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: xhci: fix 'broken_suspend' placement in struct xchi_hcd
Nicolas Saenz Julienne [Mon, 17 Dec 2018 13:37:40 +0000 (14:37 +0100)]
USB: xhci: fix 'broken_suspend' placement in struct xchi_hcd

commit 2419f30a4a4fcaa5f35111563b4c61f1b2b26841 upstream.

As commented in the struct's definition there shouldn't be anything
underneath its 'priv[0]' member as it would break some macros.

The patch converts the broken_suspend into a bit-field and relocates it
next to to the rest of bit-fields.

Fixes: a7d57abcc8a5 ("xhci: workaround CSS timeout on AMD SNPS 3.0 xHC")
Reported-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxhci: Don't prevent USB2 bus suspend in state check intended for USB3 only
Mathias Nyman [Fri, 14 Dec 2018 08:54:43 +0000 (10:54 +0200)]
xhci: Don't prevent USB2 bus suspend in state check intended for USB3 only

commit 45f750c16cae3625014c14c77bd9005eda975d35 upstream.

The code to prevent a bus suspend if a USB3 port was still in link training
also reacted to USB2 port polling state.
This caused bus suspend to busyloop in some cases.
USB2 polling state is different from USB3, and should not prevent bus
suspend.

Limit the USB3 link training state check to USB3 root hub ports only.
The origial commit went to stable so this need to be applied there as well

Fixes: 2f31a67f01a8 ("usb: xhci: Prevent bus suspend if a port connect change or polling state is detected")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: hso: Fix OOB memory access in hso_probe/hso_get_config_data
Hui Peng [Wed, 12 Dec 2018 11:42:24 +0000 (12:42 +0100)]
USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data

commit 5146f95df782b0ac61abde36567e718692725c89 upstream.

The function hso_probe reads if_num from the USB device (as an u8) and uses
it without a length check to index an array, resulting in an OOB memory read
in hso_probe or hso_get_config_data.

Add a length check for both locations and updated hso_probe to bail on
error.

This issue has been assigned CVE-2018-19985.

Reported-by: Hui Peng <benquike@gmail.com>
Reported-by: Mathias Payer <mathias.payer@nebelwelt.net>
Signed-off-by: Hui Peng <benquike@gmail.com>
Signed-off-by: Mathias Payer <mathias.payer@nebelwelt.net>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocifs: integer overflow in in SMB2_ioctl()
Dan Carpenter [Mon, 10 Sep 2018 11:12:07 +0000 (14:12 +0300)]
cifs: integer overflow in in SMB2_ioctl()

commit 2d204ee9d671327915260071c19350d84344e096 upstream

The "le32_to_cpu(rsp->OutputOffset) + *plen" addition can overflow and
wrap around to a smaller value which looks like it would lead to an
information leak.

Fixes: 4a72dafa19ba ("SMB2 FSCTL and IOCTL worker function")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoperf record: Synthesize features before events in pipe mode
Jiri Olsa [Wed, 14 Mar 2018 09:22:04 +0000 (10:22 +0100)]
perf record: Synthesize features before events in pipe mode

[ Upstream commit a2015516c5c0be932a69e1d3405c2fb03b4eacf1 ]

We need to synthesize events first, because some features works on top
of them (on report side).

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180314092205.23291-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoib_srpt: Fix a use-after-free in __srpt_close_all_ch()
Bart Van Assche [Mon, 2 Jul 2018 21:08:45 +0000 (14:08 -0700)]
ib_srpt: Fix a use-after-free in __srpt_close_all_ch()

commit 14d15c2b278011056482eb015dff89f9cbf2b841 upstream

BUG: KASAN: use-after-free in srpt_set_enabled+0x1a9/0x1e0 [ib_srpt]
Read of size 4 at addr ffff8801269d23f8 by task check/29726

CPU: 4 PID: 29726 Comm: check Not tainted 4.18.0-rc2-dbg+ #4
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
Call Trace:
 dump_stack+0xa4/0xf5
 print_address_description+0x6f/0x270
 kasan_report+0x241/0x360
 __asan_load4+0x78/0x80
 srpt_set_enabled+0x1a9/0x1e0 [ib_srpt]
 srpt_tpg_enable_store+0xb8/0x120 [ib_srpt]
 configfs_write_file+0x14e/0x1d0 [configfs]
 __vfs_write+0xd2/0x3b0
 vfs_write+0x101/0x270
 ksys_write+0xab/0x120
 __x64_sys_write+0x43/0x50
 do_syscall_64+0x77/0x230
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f235cfe6154

Fixes: aaf45bd83eba ("IB/srpt: Detect session shutdown reliably")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoubifs: Fix directory size calculation for symlinks
Richard Weinberger [Mon, 11 Jun 2018 21:41:09 +0000 (23:41 +0200)]
ubifs: Fix directory size calculation for symlinks

commit 00ee8b60102862f4daf0814d12a2ea2744fc0b9b upstream

We have to account the name of the symlink and not the target length.

Fixes: ca7f85be8d6c ("ubifs: Add support for encrypted symlinks")
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoASoC: sta32x: set ->component pointer in private struct
Daniel Mack [Thu, 11 Oct 2018 18:32:05 +0000 (20:32 +0200)]
ASoC: sta32x: set ->component pointer in private struct

commit 747df19747bc9752cd40b9cce761e17a033aa5c2 upstream

The ESD watchdog code in sta32x_watchdog() dereferences the pointer
which is never assigned.

This is a regression from a1be4cead9b950 ("ASoC: sta32x: Convert to direct
regmap API usage.") which went unnoticed since nobody seems to use that ESD
workaround.

Fixes: a1be4cead9b950 ("ASoC: sta32x: Convert to direct regmap API usage.")
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoblock: fix infinite loop if the device loses discard capability
Mikulas Patocka [Tue, 3 Jul 2018 17:34:22 +0000 (13:34 -0400)]
block: fix infinite loop if the device loses discard capability

[ Upstream commit b88aef36b87c9787a4db724923ec4f57dfd513f3 ]

If __blkdev_issue_discard is in progress and a device mapper device is
reloaded with a table that doesn't support discard,
q->limits.max_discard_sectors is set to zero. This results in infinite
loop in __blkdev_issue_discard.

This patch checks if max_discard_sectors is zero and aborts with
-EOPNOTSUPP.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Tested-by: Zdenek Kabelac <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoblock: break discard submissions into the user defined size
Jens Axboe [Tue, 8 May 2018 21:09:41 +0000 (15:09 -0600)]
block: break discard submissions into the user defined size

[ Upstream commit af097f5d199e2aa3ab3ef777f0716e487b8f7b08 ]

Don't build discards bigger than what the user asked for, if the
user decided to limit the size by writing to 'discard_max_bytes'.

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoLinux 4.14.90 v4.14.90
Greg Kroah-Hartman [Fri, 21 Dec 2018 13:13:19 +0000 (14:13 +0100)]
Linux 4.14.90

5 years agobpf, arm: fix emit_ldx_r and emit_mov_i using TMP_REG_1
Nicolas Schichan [Wed, 19 Dec 2018 21:40:42 +0000 (22:40 +0100)]
bpf, arm: fix emit_ldx_r and emit_mov_i using TMP_REG_1

emit_ldx_r() and emit_a32_mov_i() were both using TMP_REG_1 and
clashing with each other. Using TMP_REG_2 in emit_ldx_r() fixes
the issue.

Fixes: ec19e02b343 ("ARM: net: bpf: fix LDX instructions")
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agortc: snvs: Add timeouts to avoid kernel lockups
Trent Piepho [Wed, 16 May 2018 23:45:51 +0000 (16:45 -0700)]
rtc: snvs: Add timeouts to avoid kernel lockups

[ Upstream commit cd7f3a249dbed2858e6c2f30e5be7f1f7a709ee2 ]

In order to read correctly from asynchronously updated RTC registers,
it's necessary to read repeatedly until their values do not change from
read to read.  It's also necessary to wait for three RTC clock ticks for
certain operations.  There are no timeouts in this code and these
operations could possibly loop forever.

To avoid kernel hangs, put in timeouts.

The iMX7d can be configured to stop the SRTC on a tamper event, which
will lockup the kernel inside this driver as described above.

These hangs can happen when running under qemu, which doesn't emulate
the SNVS RTC, though currently the driver will refuse to load on qemu
due to a timeout in the driver probe method.

It could also happen if the SRTC block where somehow placed into reset
or the slow speed clock that drives the SRTC counter (but not the CPU)
were to stop.

The symptoms on a two core iMX7d are a work queue hang on
rtc_timer_do_work(), which eventually blocks a systemd fsnotify
operation that triggers a work queue flush, causing systemd to hang and
thus causing all services that should be started by systemd, like a
console getty, to fail to start or stop.

Also optimize the wait code to wait less.  It only needs to wait for the
clock to advance three ticks, not to see it change three times.

Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Signed-off-by: Trent Piepho <tpiepho@impinj.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agonvmet-rdma: fix response use after free
Israel Rukshin [Wed, 5 Dec 2018 16:54:57 +0000 (16:54 +0000)]
nvmet-rdma: fix response use after free

[ Upstream commit d7dcdf9d4e15189ecfda24cc87339a3425448d5c ]

nvmet_rdma_release_rsp() may free the response before using it at error
flow.

Fixes: 8407879 ("nvmet-rdma: fix possible bogus dereference under heavy load")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoi2c: uniphier-f: fix violation of tLOW requirement for Fast-mode
Masahiro Yamada [Thu, 6 Dec 2018 03:55:28 +0000 (12:55 +0900)]
i2c: uniphier-f: fix violation of tLOW requirement for Fast-mode

[ Upstream commit ece27a337d42a3197935711997f2880f0957ed7e ]

Currently, the clock duty is set as tLOW/tHIGH = 1/1. For Fast-mode,
tLOW is set to 1.25 us while the I2C spec requires tLOW >= 1.3 us.

tLOW/tHIGH = 5/4 would meet both Standard-mode and Fast-mode:
  Standard-mode: tLOW = 5.56 us, tHIGH = 4.44 us
  Fast-mode:     tLOW = 1.39 us, tHIGH = 1.11 us

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoi2c: uniphier: fix violation of tLOW requirement for Fast-mode
Masahiro Yamada [Thu, 6 Dec 2018 03:55:27 +0000 (12:55 +0900)]
i2c: uniphier: fix violation of tLOW requirement for Fast-mode

[ Upstream commit 8469636ab5d8c77645b953746c10fda6983a8830 ]

Currently, the clock duty is set as tLOW/tHIGH = 1/1. For Fast-mode,
tLOW is set to 1.25 us while the I2C spec requires tLOW >= 1.3 us.

tLOW/tHIGH = 5/4 would meet both Standard-mode and Fast-mode:
  Standard-mode: tLOW = 5.56 us, tHIGH = 4.44 us
  Fast-mode:     tLOW = 1.39 us, tHIGH = 1.11 us

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoi2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node
Hans de Goede [Wed, 21 Nov 2018 09:19:55 +0000 (10:19 +0100)]
i2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node

[ Upstream commit 0544ee4b1ad574aec3b6379af5f5cdee42840971 ]

Some AMD based HP laptops have a SMB0001 ACPI device node which does not
define any methods.

This leads to the following error in dmesg:

[    5.222731] cmi: probe of SMB0001:00 failed with error -5

This commit makes acpi_smbus_cmi_add() return -ENODEV instead in this case
silencing the error. In case of a failure of the i2c_add_adapter() call
this commit now propagates the error from that call instead of -EIO.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoi2c: axxia: properly handle master timeout
Adamski, Krzysztof (Nokia - PL/Wroclaw) [Fri, 16 Nov 2018 13:24:41 +0000 (13:24 +0000)]
i2c: axxia: properly handle master timeout

[ Upstream commit 6c7f25cae54b840302e4f1b371dbf318fbf09ab2 ]

According to Intel (R) Axxia TM Lionfish Communication Processor
Peripheral Subsystem Hardware Reference Manual, the AXXIA I2C module
have a programmable Master Wait Timer, which among others, checks the
time between commands send in manual mode. When a timeout (25ms) passes,
TSS bit is set in Master Interrupt Status register and a Stop command is
issued by the hardware.

The axxia_i2c_xfer(), does not properly handle this situation, however.
For each message a separate axxia_i2c_xfer_msg() is called and this
function incorrectly assumes that any interrupt might happen only when
waiting for completion. This is mostly correct but there is one
exception - a master timeout can trigger if enough time has passed
between individual transfers. It will, by definition, happen between
transfers when the interrupts are disabled by the code. If that happens,
the hardware issues Stop command.

The interrupt indicating timeout will not be triggered as soon as we
enable them since the Master Interrupt Status is cleared when master
mode is entered again (which happens before enabling irqs) meaning this
error is lost and the transfer is continued even though the Stop was
issued on the bus. The subsequent operations completes without error but
a bogus value (0xFF in case of read) is read as the client device is
confused because aborted transfer. No error is returned from
master_xfer() making caller believe that a valid value was read.

To fix the problem, the TSS bit (indicating timeout) in Master Interrupt
Status register is checked before each transfer. If it is set, there was
a timeout before this transfer and (as described above) the hardware
already issued Stop command so the transaction should be aborted thus
-ETIMEOUT is returned from the master_xfer() callback. In order to be
sure no timeout was issued we can't just read the status just before
starting new transaction as there will always be a small window of time
(few CPU cycles at best) where this might still happen. For this reason
we have to temporally disable the timer before checking for TSS bit.
Disabling it will, however, clear the TSS bit so in order to preserve
that information, we have to read it in ISR so we have to ensure that
the TSS interrupt is not masked between transfers of one transaction.
There is no need to call bus recovery or controller reinitialization if
that happens so it's skipped.

Signed-off-by: Krzysztof Adamski <krzysztof.adamski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomlxsw: spectrum_switchdev: Fix VLAN device deletion via ioctl
Ido Schimmel [Thu, 6 Dec 2018 17:44:53 +0000 (17:44 +0000)]
mlxsw: spectrum_switchdev: Fix VLAN device deletion via ioctl

[ Upstream commit 993107fea5eefdfdfde1ca38d3f01f0bebf76e77 ]

When deleting a VLAN device using an ioctl the netdev is unregistered
before the VLAN filter is updated via ndo_vlan_rx_kill_vid(). It can
lead to a use-after-free in mlxsw in case the VLAN device is deleted
while being enslaved to a bridge.

The reason for the above is that when mlxsw receives the CHANGEUPPER
event, it wrongly assumes that the VLAN device is no longer its upper
and thus destroys the internal representation of the bridge port despite
the reference count being non-zero.

Fix this by checking if the VLAN device is our upper using its real
device. In net-next I'm going to remove this trick and instead make
mlxsw completely agnostic to the order of the events.

Fixes: c57529e1d5d8 ("mlxsw: spectrum: Replace vPorts with Port-VLAN")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agovhost/vsock: fix reset orphans race with close timeout
Stefan Hajnoczi [Thu, 6 Dec 2018 19:14:34 +0000 (19:14 +0000)]
vhost/vsock: fix reset orphans race with close timeout

[ Upstream commit c38f57da428b033f2721b611d84b1f40bde674a8 ]

If a local process has closed a connected socket and hasn't received a
RST packet yet, then the socket remains in the table until a timeout
expires.

When a vhost_vsock instance is released with the timeout still pending,
the socket is never freed because vhost_vsock has already set the
SOCK_DONE flag.

Check if the close timer is pending and let it close the socket.  This
prevents the race which can leak sockets.

Reported-by: Maximilian Riemensberger <riemensberger@cadami.net>
Cc: Graham Whaley <graham.whaley@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocifs: In Kconfig CONFIG_CIFS_POSIX needs depends on legacy (insecure cifs)
Steve French [Sat, 3 Nov 2018 20:02:44 +0000 (15:02 -0500)]
cifs: In Kconfig CONFIG_CIFS_POSIX needs depends on legacy (insecure cifs)

[ Upstream commit 6e785302dad32228819d8066e5376acd15d0e6ba ]

Missing a dependency.  Shouldn't show cifs posix extensions
in Kconfig if CONFIG_CIFS_ALLOW_INSECURE_DIALECTS (ie SMB1
protocol) is disabled.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodrm/ast: Fix connector leak during driver unload
Sam Bobroff [Mon, 3 Dec 2018 00:53:21 +0000 (11:53 +1100)]
drm/ast: Fix connector leak during driver unload

[ Upstream commit e594a5e349ddbfdaca1951bb3f8d72f3f1660d73 ]

When unloading the ast driver, a warning message is printed by
drm_mode_config_cleanup() because a reference is still held to one of
the drm_connector structs.

Correct this by calling drm_crtc_force_disable_all() in
ast_fbdev_destroy().

Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1e613f3c630c7bbc72e04a44b178259b9164d2f6.1543798395.git.sbobroff@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoethernet: fman: fix wrong of_node_put() in probe function
Nicolas Saenz Julienne [Mon, 3 Dec 2018 12:21:01 +0000 (13:21 +0100)]
ethernet: fman: fix wrong of_node_put() in probe function

[ Upstream commit ecb239d96d369c23c33d41708646df646de669f4 ]

After getting a reference to the platform device's of_node the probe
function ends up calling of_find_matching_node() using the node as an
argument. The function takes care of decreasing the refcount on it. We
are then incorrectly decreasing the refcount on that node again.

This patch removes the unwarranted call to of_node_put().

Fixes: 414fd46e7762 ("fsl/fman: Add FMan support")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoARM: 8815/1: V7M: align v7m_dma_inv_range() with v7 counterpart
Vladimir Murzin [Fri, 23 Nov 2018 11:25:21 +0000 (12:25 +0100)]
ARM: 8815/1: V7M: align v7m_dma_inv_range() with v7 counterpart

[ Upstream commit 3d0358d0ba048c5afb1385787aaec8fa5ad78fcc ]

Chris has discovered and reported that v7_dma_inv_range() may corrupt
memory if address range is not aligned to cache line size.

Since the whole cache-v7m.S was lifted form cache-v7.S the same
observation applies to v7m_dma_inv_range(). So the fix just mirrors
what has been done for v7 with a little specific of M-class.

Cc: Chris Cole <chris@sageembedded.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoARM: 8814/1: mm: improve/fix ARM v7_dma_inv_range() unaligned address handling
Chris Cole [Fri, 23 Nov 2018 11:20:45 +0000 (12:20 +0100)]
ARM: 8814/1: mm: improve/fix ARM v7_dma_inv_range() unaligned address handling

[ Upstream commit a1208f6a822ac29933e772ef1f637c5d67838da9 ]

This patch addresses possible memory corruption when
v7_dma_inv_range(start_address, end_address) address parameters are not
aligned to whole cache lines. This function issues "invalidate" cache
management operations to all cache lines from start_address (inclusive)
to end_address (exclusive). When start_address and/or end_address are
not aligned, the start and/or end cache lines are first issued "clean &
invalidate" operation. The assumption is this is done to ensure that any
dirty data addresses outside the address range (but part of the first or
last cache lines) are cleaned/flushed so that data is not lost, which
could happen if just an invalidate is issued.

The problem is that these first/last partial cache lines are issued
"clean & invalidate" and then "invalidate". This second "invalidate" is
not required and worse can cause "lost" writes to addresses outside the
address range but part of the cache line. If another component writes to
its part of the cache line between the "clean & invalidate" and
"invalidate" operations, the write can get lost. This fix is to remove
the extra "invalidate" operation when unaligned addressed are used.

A kernel module is available that has a stress test to reproduce the
issue and a unit test of the updated v7_dma_inv_range(). It can be
downloaded from
http://ftp.sageembedded.com/outgoing/linux/cache-test-20181107.tgz.

v7_dma_inv_range() is call by dmac_[un]map_area(addr, len, direction)
when the direction is DMA_FROM_DEVICE. One can (I believe) successfully
argue that DMA from a device to main memory should use buffers aligned
to cache line size, because the "clean & invalidate" might overwrite
data that the device just wrote using DMA. But if a driver does use
unaligned buffers, at least this fix will prevent memory corruption
outside the buffer.

Signed-off-by: Chris Cole <chris@sageembedded.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agonet/mlx4_en: Fix build break when CONFIG_INET is off
Saeed Mahameed [Sun, 2 Dec 2018 12:34:37 +0000 (14:34 +0200)]
net/mlx4_en: Fix build break when CONFIG_INET is off

[ Upstream commit 1b603f9e4313348608f256b564ed6e3d9e67f377 ]

MLX4_EN depends on NETDEVICES, ETHERNET and INET Kconfigs.
Make sure they are listed in MLX4_EN Kconfig dependencies.

This fixes the following build break:

drivers/net/ethernet/mellanox/mlx4/en_rx.c:582:18: warning: ‘struct iphdr’ declared inside parameter list [enabled by default]
struct iphdr *iph)
^
drivers/net/ethernet/mellanox/mlx4/en_rx.c:582:18: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
drivers/net/ethernet/mellanox/mlx4/en_rx.c: In function ‘get_fixed_ipv4_csum’:
drivers/net/ethernet/mellanox/mlx4/en_rx.c:586:20: error: dereferencing pointer to incomplete type
_u8 ipproto = iph->protocol;

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomv88e6060: disable hardware level MAC learning
Anderson Luiz Alves [Fri, 30 Nov 2018 23:58:36 +0000 (21:58 -0200)]
mv88e6060: disable hardware level MAC learning

[ Upstream commit a74515604a7b171f2702bdcbd1e231225fb456d0 ]

Disable hardware level MAC learning because it breaks station roaming.
When enabled it drops all frames that arrive from a MAC address
that is on a different port at learning table.

Signed-off-by: Anderson Luiz Alves <alacn1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolibata: whitelist all SAMSUNG MZ7KM* solid-state disks
Juha-Matti Tilli [Sun, 2 Dec 2018 10:47:08 +0000 (12:47 +0200)]
libata: whitelist all SAMSUNG MZ7KM* solid-state disks

[ Upstream commit fd6f32f78645db32b6b95a42e45da2ddd6de0e67 ]

These devices support read zero after trim (RZAT), as they advertise to
the OS. However, the OS doesn't believe the SSDs unless they are
explicitly whitelisted.

Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Juha-Matti Tilli <juha-matti.tilli@iki.fi>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: omap-keypad - fix keyboard debounce configuration
Tony Lindgren [Mon, 3 Dec 2018 19:24:30 +0000 (11:24 -0800)]
Input: omap-keypad - fix keyboard debounce configuration

[ Upstream commit 6c3516fed7b61a3527459ccfa67fab130d910610 ]

I noticed that the Android v3.0.8 kernel on droid4 is using different
keypad values from the mainline kernel and does not have issues with
keys occasionally being stuck until pressed again. Turns out there was
an earlier patch posted to fix this as "Input: omap-keypad: errata i689:
Correct debounce time", but it was never reposted to fix use macros
for timing calculations.

This updated version is using macros, and also fixes the use of the
input clock rate to use 32768KiHz instead of 32000KiHz. And we want to
use the known good Android kernel values of 3 and 6 instead of 2 and 6
in the earlier patch.

Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: synaptics - enable SMBus for HP 15-ay000
Teika Kazura [Mon, 3 Dec 2018 19:26:03 +0000 (11:26 -0800)]
Input: synaptics - enable SMBus for HP 15-ay000

[ Upstream commit 5a6dab15f7a79817cab4af612ddd99eda793fce6 ]

SMBus works fine for the touchpad with id SYN3221, used in the HP 15-ay000
series,

This device has been reported in these messages in the "linux-input"
mailing list:
* https://marc.info/?l=linux-input&m=152016683003369&w=2
* https://www.spinics.net/lists/linux-input/msg52525.html

Reported-by: Nitesh Debnath <niteshkd1999@gmail.com>
Reported-by: Teika Kazura <teika@gmx.com>
Signed-off-by: Teika Kazura <teika@gmx.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoclk: mmp: Off by one in mmp_clk_add()
Dan Carpenter [Mon, 3 Dec 2018 14:51:43 +0000 (17:51 +0300)]
clk: mmp: Off by one in mmp_clk_add()

[ Upstream commit 2e85c57493e391b93445c1e0d530b36b95becc64 ]

The > comparison should be >= or we write one element beyond the end of
the unit->clk_table[] array.

(The unit->clk_table[] array is allocated in the mmp_clk_init() function
and it has unit->nr_clks elements).

Fixes: 4661fda10f8b ("clk: mmp: add basic support functions for DT support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoclk: mvebu: Off by one bugs in cp110_of_clk_get()
Dan Carpenter [Mon, 3 Dec 2018 14:50:55 +0000 (17:50 +0300)]
clk: mvebu: Off by one bugs in cp110_of_clk_get()

[ Upstream commit d9f5b7f5dd0fa74a89de5a7ac1e26366f211ccee ]

These > comparisons should be >= to prevent reading beyond the end of
of the clk_data->hws[] buffer.

The clk_data->hws[] array is allocated in cp110_syscon_common_probe()
when we do:
cp110_clk_data = devm_kzalloc(dev, sizeof(*cp110_clk_data) +
      sizeof(struct clk_hw *) * CP110_CLK_NUM,
      GFP_KERNEL);
As you can see, it has CP110_CLK_NUM elements which is equivalent to
CP110_MAX_CORE_CLOCKS + CP110_MAX_GATABLE_CLOCKS.

Fixes: d3da3eaef7f4 ("clk: mvebu: new driver for Armada CP110 system controller")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodrm/msm: Fix error return checking
Wen Yang [Thu, 29 Nov 2018 06:01:50 +0000 (14:01 +0800)]
drm/msm: Fix error return checking

[ Upstream commit 098336deb946f37a70afc0979af388b615c378bf ]

The error checks on ret for a negative error return always fails because
the return value of iommu_map_sg() is unsigned and can never be negative.

Detected with Coccinelle:
drivers/gpu/drm/msm/msm_iommu.c:69:9-12: WARNING: Unsigned expression
compared with zero: ret < 0

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
CC: Rob Clark <robdclark@gmail.com>
CC: David Airlie <airlied@linux.ie>
CC: Julia Lawall <julia.lawall@lip6.fr>
CC: linux-arm-msm@vger.kernel.org
CC: dri-devel@lists.freedesktop.org
CC: freedreno@lists.freedesktop.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoide: pmac: add of_node_put()
Yangtao Li [Tue, 20 Nov 2018 13:02:49 +0000 (08:02 -0500)]
ide: pmac: add of_node_put()

[ Upstream commit a51921c0db3fd26c4ed83dc0ec5d32988fa02aa5 ]

use of_node_put() to release the refcount.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodrivers/tty: add missing of_node_put()
Yangtao Li [Wed, 21 Nov 2018 15:22:54 +0000 (10:22 -0500)]
drivers/tty: add missing of_node_put()

[ Upstream commit dac097c4546e4c5b16dd303a1e97c1d319c8ab3e ]

of_find_node_by_path() acquires a reference to the node
returned by it and that reference needs to be dropped by its caller.
This place is not doing this, so fix it.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodrivers/sbus/char: add of_node_put()
Yangtao Li [Tue, 20 Nov 2018 13:38:26 +0000 (08:38 -0500)]
drivers/sbus/char: add of_node_put()

[ Upstream commit 6bd520ab7cf69486ea81fd3cdfd2d5a390ad1100 ]

use of_node_put() to release the refcount.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agosbus: char: add of_node_put()
Yangtao Li [Tue, 20 Nov 2018 13:30:40 +0000 (08:30 -0500)]
sbus: char: add of_node_put()

[ Upstream commit 87d81a23e24f24ebe014891e8bdf3ff8785031e8 ]

use of_node_put() to release the refcount.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoSUNRPC: Fix a potential race in xprt_connect()
Trond Myklebust [Sun, 2 Dec 2018 04:18:00 +0000 (23:18 -0500)]
SUNRPC: Fix a potential race in xprt_connect()

[ Upstream commit 0a9a4304f3614e25d9de9b63502ca633c01c0d70 ]

If an asynchronous connection attempt completes while another task is
in xprt_connect(), then the call to rpc_sleep_on() could end up
racing with the call to xprt_wake_pending_tasks().
So add a second test of the connection state after we've put the
task to sleep and set the XPRT_CONNECTING flag, when we know that there
can be no asynchronous connection attempts still in progress.

Fixes: 0b9e79431377d ("SUNRPC: Move the test for XPRT_CONNECTING into...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agonfs: don't dirty kernel pages read by direct-io
Dave Kleikamp [Tue, 27 Nov 2018 19:31:30 +0000 (19:31 +0000)]
nfs: don't dirty kernel pages read by direct-io

[ Upstream commit ad3cba223ac02dc769c3bbe88efe277bbb457566 ]

When we use direct_IO with an NFS backing store, we can trigger a
WARNING in __set_page_dirty(), as below, since we're dirtying the page
unnecessarily in nfs_direct_read_completion().

To fix, replicate the logic in commit 53cbf3b157a0 ("fs: direct-io:
don't dirtying pages for ITER_BVEC/ITER_KVEC direct read").

Other filesystems that implement direct_IO handle this; most use
blockdev_direct_IO(). ceph and cifs have similar logic.

mount 127.0.0.1:/export /nfs
dd if=/dev/zero of=/nfs/image bs=1M count=200
losetup --direct-io=on -f /nfs/image
mkfs.btrfs /dev/loop0
mount -t btrfs /dev/loop0 /mnt/

kernel: WARNING: CPU: 0 PID: 8067 at fs/buffer.c:580 __set_page_dirty+0xaf/0xd0
kernel: Modules linked in: loop(E) nfsv3(E) rpcsec_gss_krb5(E) nfsv4(E) dns_resolver(E) nfs(E) fscache(E) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) fuse(E) tun(E) ip6t_rpfilter(E) ipt_REJECT(E) nf_
kernel:  snd_seq(E) snd_seq_device(E) snd_pcm(E) video(E) snd_timer(E) snd(E) soundcore(E) ip_tables(E) xfs(E) libcrc32c(E) sd_mod(E) sr_mod(E) cdrom(E) ata_generic(E) pata_acpi(E) crc32c_intel(E) ahci(E) li
kernel: CPU: 0 PID: 8067 Comm: kworker/0:2 Tainted: G            E     4.20.0-rc1.master.20181111.ol7.x86_64 #1
kernel: Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
kernel: Workqueue: nfsiod rpc_async_release [sunrpc]
kernel: RIP: 0010:__set_page_dirty+0xaf/0xd0
kernel: Code: c3 48 8b 02 f6 c4 04 74 d4 48 89 df e8 ba 05 f7 ff 48 89 c6 eb cb 48 8b 43 08 a8 01 75 1f 48 89 d8 48 8b 00 a8 04 74 02 eb 87 <0f> 0b eb 83 48 83 e8 01 eb 9f 48 83 ea 01 0f 1f 00 eb 8b 48 83 e8
kernel: RSP: 0000:ffffc1c8825b7d78 EFLAGS: 00013046
kernel: RAX: 000fffffc0020089 RBX: fffff2b603308b80 RCX: 0000000000000001
kernel: RDX: 0000000000000001 RSI: ffff9d11478115c8 RDI: ffff9d11478115d0
kernel: RBP: ffffc1c8825b7da0 R08: 0000646f6973666e R09: 8080808080808080
kernel: R10: 0000000000000001 R11: 0000000000000000 R12: ffff9d11478115d0
kernel: R13: ffff9d11478115c8 R14: 0000000000003246 R15: 0000000000000001
kernel: FS:  0000000000000000(0000) GS:ffff9d115ba00000(0000) knlGS:0000000000000000
kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 00007f408686f640 CR3: 0000000104d8e004 CR4: 00000000000606f0
kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kernel: Call Trace:
kernel:  __set_page_dirty_buffers+0xb6/0x110
kernel:  set_page_dirty+0x52/0xb0
kernel:  nfs_direct_read_completion+0xc4/0x120 [nfs]
kernel:  nfs_pgio_release+0x10/0x20 [nfs]
kernel:  rpc_free_task+0x30/0x70 [sunrpc]
kernel:  rpc_async_release+0x12/0x20 [sunrpc]
kernel:  process_one_work+0x174/0x390
kernel:  worker_thread+0x4f/0x3e0
kernel:  kthread+0x102/0x140
kernel:  ? drain_workqueue+0x130/0x130
kernel:  ? kthread_stop+0x110/0x110
kernel:  ret_from_fork+0x35/0x40
kernel: ---[ end trace 01341980905412c9 ]---

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
[forward-ported to v4.20]
Signed-off-by: Calum Mackay <calum.mackay@oracle.com>
Reviewed-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobpf: Fix verifier log string check for bad alignment.
David Miller [Thu, 29 Nov 2018 06:33:53 +0000 (22:33 -0800)]
bpf: Fix verifier log string check for bad alignment.

[ Upstream commit c01ac66b38660f2b507ccd0b75d28e3002d56fbb ]

The message got changed a lot time ago.

This was responsible for 36 test case failures on sparc64.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobonding: fix 802.3ad state sent to partner when unbinding slave
Toni Peltonen [Tue, 27 Nov 2018 14:56:57 +0000 (16:56 +0200)]
bonding: fix 802.3ad state sent to partner when unbinding slave

[ Upstream commit 3b5b3a3331d141e8f2a7aaae3a94dfa1e61ecbe4 ]

Previously when unbinding a slave the 802.3ad implementation only told
partner that the port is not suitable for aggregation by setting the port
aggregation state from aggregatable to individual. This is not enough. If the
physical layer still stays up and we only unbinded this port from the bond there
is nothing in the aggregation status alone to prevent the partner from sending
traffic towards us. To ensure that the partner doesn't consider this
port at all anymore we should also disable collecting and distributing to
signal that this actor is going away. Also clear AD_STATE_SYNCHRONIZATION to
ensure partner exits collecting + distributing state.

I have tested this behaviour againts Arista EOS switches with mlx5 cards
(physical link stays up even when interface is down) and simulated
the same situation virtually Linux <-> Linux with two network namespaces
running two veth device pairs. In both cases setting aggregation to
individual doesn't alone prevent traffic from being to sent towards this
port given that the link stays up in partners end. Partner still keeps
it's end in collecting + distributing state and continues until timeout is
reached. In most cases this means we are losing the traffic partner sends
towards our port while we wait for timeout. This is most visible with slow
periodic time (LACP rate slow).

Other open source implementations like Open VSwitch and libreswitch, and
vendor implementations like Arista EOS, seem to disable collecting +
distributing to when doing similar port disabling/detaching/removing change.
With this patch kernel implementation would behave the same way and ensure
partner doesn't consider our actor viable anymore.

Signed-off-by: Toni Peltonen <peltzi@peltzi.fi>
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoARC: io.h: Implement reads{x}()/writes{x}()
Jose Abreu [Fri, 30 Nov 2018 09:47:31 +0000 (09:47 +0000)]
ARC: io.h: Implement reads{x}()/writes{x}()

[ Upstream commit 10d443431dc2bb733cf7add99b453e3fb9047a2e ]

Some ARC CPU's do not support unaligned loads/stores. Currently, generic
implementation of reads{b/w/l}()/writes{b/w/l}() is being used with ARC.
This can lead to misfunction of some drivers as generic functions do a
plain dereference of a pointer that can be unaligned.

Let's use {get/put}_unaligned() helpers instead of plain dereference of
pointer in order to fix. The helpers allow to get and store data from an
unaligned address whilst preserving the CPU internal alignment.
According to [1], the use of these helpers are costly in terms of
performance so we added an initial check for a buffer already aligned so
that the usage of the helpers can be avoided, when possible.

[1] Documentation/unaligned-memory-access.txt

Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Tested-by: Vitor Soares <soares@synopsys.com>
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodrm/msm: Grab a vblank reference when waiting for commit_done
Sean Paul [Wed, 3 Oct 2018 20:22:31 +0000 (16:22 -0400)]
drm/msm: Grab a vblank reference when waiting for commit_done

[ Upstream commit 3b712e43e3876b42b38321ecf790a1f5fe59c834 ]

Similar to the atomic helpers, we should enable vblank while we're
waiting for the commit to finish. DPU needs this, MDP5 seems to work
fine without it.

Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/earlyprintk/efi: Fix infinite loop on some screen widths
YiFei Zhu [Thu, 29 Nov 2018 17:12:30 +0000 (18:12 +0100)]
x86/earlyprintk/efi: Fix infinite loop on some screen widths

[ Upstream commit 79c2206d369b87b19ac29cb47601059b6bf5c291 ]

An affected screen resolution is 1366 x 768, which width is not
divisible by 8, the default font width. On such screens, when longer
lines are earlyprintk'ed, overflow-to-next-line can never trigger,
due to the left-most x-coordinate of the next character always less
than the screen width. Earlyprintk will infinite loop in trying to
print the rest of the string but unable to, due to the line being
full.

This patch makes the trigger consider the right-most x-coordinate,
instead of left-most, as the value to compare against the screen
width threshold.

Signed-off-by: YiFei Zhu <zhuyifei1999@gmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arend van Spriel <arend.vanspriel@broadcom.com>
Cc: Bhupesh Sharma <bhsharma@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Eric Snowberg <eric.snowberg@oracle.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: Jon Hunter <jonathanh@nvidia.com>
Cc: Julien Thierry <julien.thierry@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20181129171230.18699-12-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: vmw_pscsi: Rearrange code to avoid multiple calls to free_irq during unload
Cathy Avery [Tue, 27 Nov 2018 19:28:53 +0000 (14:28 -0500)]
scsi: vmw_pscsi: Rearrange code to avoid multiple calls to free_irq during unload

[ Upstream commit 02f425f811cefcc4d325d7a72272651e622dc97e ]

Currently pvscsi_remove calls free_irq more than once as
pvscsi_release_resources and __pvscsi_shutdown both call
pvscsi_shutdown_intr. This results in a 'Trying to free already-free IRQ'
warning and stack trace. To solve the problem pvscsi_shutdown_intr has been
moved out of pvscsi_release_resources.

Signed-off-by: Cathy Avery <cavery@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: libiscsi: Fix NULL pointer dereference in iscsi_eh_session_reset
Fred Herard [Wed, 21 Nov 2018 01:22:45 +0000 (20:22 -0500)]
scsi: libiscsi: Fix NULL pointer dereference in iscsi_eh_session_reset

[ Upstream commit 5db6dd14b31397e8cccaaddab2ff44ebec1acf25 ]

This commit addresses NULL pointer dereference in iscsi_eh_session_reset.
Reference should not be made to session->leadconn when session->state is
set to ISCSI_STATE_TERMINATE.

Signed-off-by: Fred Herard <fred.herard@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: hyper-v - fix wakeup from suspend-to-idle
Vitaly Kuznetsov [Thu, 15 Nov 2018 19:05:10 +0000 (11:05 -0800)]
Input: hyper-v - fix wakeup from suspend-to-idle

[ Upstream commit 10f91c73cc41ceead210a905dbd196398e99c7d2 ]

It makes little sense but still possible to put Hyper-V guests into
suspend-to-idle state. To wake them up two wakeup sources were registered
in the past: hyperv-keyboard and hid-hyperv. However, since
commit eed4d47efe95 ("ACPI / sleep: Ignore spurious SCI wakeups from
suspend-to-idle") pm_wakeup_event() from these devices is ignored. Switch
to pm_wakeup_hard_event() API as these devices are actually the only
possible way to wakeup Hyper-V guests.

Fixes: eed4d47efe95 (ACPI / sleep: Ignore spurious SCI wakeups from suspend-to-idle)
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomac80211_hwsim: fix module init error paths for netlink
Alexey Khoroshilov [Fri, 5 Oct 2018 20:22:06 +0000 (23:22 +0300)]
mac80211_hwsim: fix module init error paths for netlink

[ Upstream commit 05cc09de4c017663a217630682041066f2f9a5cd ]

There is no unregister netlink notifier and family on error paths
in init_mac80211_hwsim(). Also there is an error path where
hwsim_class is not destroyed.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Fixes: 62759361eb49 ("mac80211-hwsim: Provide multicast event for HWSIM_CMD_NEW_RADIO")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Fix build for anonymous union in older GCC compilers
Steven Rostedt (VMware) [Fri, 22 Jun 2018 00:35:26 +0000 (20:35 -0400)]
locking/qspinlock: Fix build for anonymous union in older GCC compilers

[ Upstream commit 6cc65be4f6f2a7186af8f3e09900787c7912dad2 ]

One of my tests compiles the kernel with gcc 4.5.3, and I hit the
following build error:

  include/linux/semaphore.h: In function 'sema_init':
  include/linux/semaphore.h:35:17: error: unknown field 'val' specified in initializer
  include/linux/semaphore.h:35:17: warning: missing braces around initializer
  include/linux/semaphore.h:35:17: warning: (near initialization for '(anonymous).raw_lock.<anonymous>.val')

I bisected it down to:

 625e88be1f41 ("locking/qspinlock: Merge 'struct __qspinlock' into 'struct qspinlock'")

... which makes qspinlock have an anonymous union, which makes initializing it special
for older compilers. By adding strategic brackets, it makes the build
happy again.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Fixes: 625e88be1f41 ("locking/qspinlock: Merge 'struct __qspinlock' into 'struct qspinlock'")
Link: http://lkml.kernel.org/r/20180621203526.172ab5c4@vmware.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoIB/hfi1: Remove race conditions in user_sdma send path
Michael J. Ruhl [Tue, 18 Dec 2018 21:04:18 +0000 (16:04 -0500)]
IB/hfi1: Remove race conditions in user_sdma send path

commit 28a9a9e83ceae2cee25b9af9ad20d53aaa9ab951 upstream

Packet queue state is over used to determine SDMA descriptor
availablitity and packet queue request state.

cpu 0  ret = user_sdma_send_pkts(req, pcount);
cpu 0  if (atomic_read(&pq->n_reqs))
cpu 1  IRQ user_sdma_txreq_cb calls pq_update() (state to _INACTIVE)
cpu 0        xchg(&pq->state, SDMA_PKT_Q_ACTIVE);

At this point pq->n_reqs == 0 and pq->state is incorrectly
SDMA_PKT_Q_ACTIVE.  The close path will hang waiting for the state
to return to _INACTIVE.

This can also change the state from _DEFERRED to _ACTIVE.  However,
this is a mostly benign race.

Remove the racy code path.

Use n_reqs to determine if a packet queue is active or not.

Cc: <stable@vger.kernel.org> # 4.14.0>
Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomac80211: Fix condition validating WMM IE
Ilan Peer [Tue, 3 Apr 2018 08:35:22 +0000 (11:35 +0300)]
mac80211: Fix condition validating WMM IE

[ Upstream commit 911a26484c33e10de6237228ca1d7293548e9f49 ]

Commit c470bdc1aaf3 ("mac80211: don't WARN on bad WMM parameters from
buggy APs") handled cases where an AP reports a zeroed WMM
IE. However, the condition that checks the validity accessed the wrong
index in the ieee80211_tx_queue_params array, thus wrongly deducing
that the parameters are invalid. Fix it.

Fixes: c470bdc1aaf3 ("mac80211: don't WARN on bad WMM parameters from buggy APs")
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomac80211: don't WARN on bad WMM parameters from buggy APs
Emmanuel Grumbach [Mon, 26 Mar 2018 13:21:04 +0000 (16:21 +0300)]
mac80211: don't WARN on bad WMM parameters from buggy APs

[ Upstream commit c470bdc1aaf36669e04ba65faf1092b2d1c6cabe ]

Apparently, some APs are buggy enough to send a zeroed
WMM IE. Don't WARN on this since this is not caused by a bug
on the client's system.

This aligns the condition of the WARNING in drv_conf_tx
with the validity check in ieee80211_sta_wmm_params.
We will now pick the default values whenever we get
a zeroed WMM IE.

This has been reported here:
https://bugzilla.kernel.org/show_bug.cgi?id=199161

Fixes: f409079bb678 ("mac80211: sanity check CW_min/CW_max towards driver")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agonetfilter: ipset: Fix wraparound in hash:*net* types
Jozsef Kadlecsik [Fri, 12 Jan 2018 10:16:50 +0000 (11:16 +0100)]
netfilter: ipset: Fix wraparound in hash:*net* types

[ Upstream commit 0b8d9073539e217f79ec1bff65eb205ac796723d ]

Fix wraparound bug which could lead to memory exhaustion when adding an
x.x.x.x-255.255.255.255 range to any hash:*net* types.

Fixes Netfilter's bugzilla id #1212, reported by Thomas Schwark.

Fixes: 48596a8ddc46 ("netfilter: ipset: Fix adding an IPv4 range containing more than 2^31 addresses")
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoelevator: lookup mq vs non-mq elevators
Jens Axboe [Wed, 25 Oct 2017 18:33:42 +0000 (12:33 -0600)]
elevator: lookup mq vs non-mq elevators

[ Upstream commit 2527d99789e248576ac8081530cd4fd88730f8c7 ]

If an IO scheduler is selected via elevator= and it doesn't match
the driver in question wrt blk-mq support, then we fail to boot.

The elevator= parameter is deprecated and only supported for
non-mq devices. Augment the elevator lookup API so that we
pass in if we're looking for an mq capable scheduler or not,
so that we only ever return a valid type for the queue in
question.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=196695
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock, x86: Provide liveness guarantee
Peter Zijlstra [Tue, 18 Dec 2018 17:14:00 +0000 (18:14 +0100)]
locking/qspinlock, x86: Provide liveness guarantee

commit 7aa54be2976550f17c11a1c3e3630002dea39303 upstream.

On x86 we cannot do fetch_or() with a single instruction and thus end up
using a cmpxchg loop, this reduces determinism. Replace the fetch_or()
with a composite operation: tas-pending + load.

Using two instructions of course opens a window we previously did not
have. Consider the scenario:

CPU0 CPU1 CPU2

 1) lock
  trylock -> (0,0,1)

 2) lock
  trylock /* fail */

 3) unlock -> (0,0,0)

 4) lock
  trylock -> (0,0,1)

 5)   tas-pending -> (0,1,1)
  load-val <- (0,1,0) from 3

 6)   clear-pending-set-locked -> (0,0,1)

  FAIL: _2_ owners

where 5) is our new composite operation. When we consider each part of
the qspinlock state as a separate variable (as we can when
_Q_PENDING_BITS == 8) then the above is entirely possible, because
tas-pending will only RmW the pending byte, so the later load is able
to observe prior tail and lock state (but not earlier than its own
trylock, which operates on the whole word, due to coherence).

To avoid this we need 2 things:

 - the load must come after the tas-pending (obviously, otherwise it
   can trivially observe prior state).

 - the tas-pending must be a full word RmW instruction, it cannot be an XCHGB for
   example, such that we cannot observe other state prior to setting
   pending.

On x86 we can realize this by using "LOCK BTS m32, r32" for
tas-pending followed by a regular load.

Note that observing later state is not a problem:

 - if we fail to observe a later unlock, we'll simply spin-wait for
   that store to become visible.

 - if we observe a later xchg_tail(), there is no difference from that
   xchg_tail() having taken place before the tas-pending.

Suggested-by: Will Deacon <will.deacon@arm.com>
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: andrea.parri@amarulasolutions.com
Cc: longman@redhat.com
Fixes: 59fb586b4a07 ("locking/qspinlock: Remove unbounded cmpxchg() loop from locking slowpath")
Link: https://lkml.kernel.org/r/20181003130957.183726335@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bigeasy: GEN_BINARY_RMWcc macro redo]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock/x86: Increase _Q_PENDING_LOOPS upper bound
Will Deacon [Tue, 18 Dec 2018 17:13:59 +0000 (18:13 +0100)]
locking/qspinlock/x86: Increase _Q_PENDING_LOOPS upper bound

commit b247be3fe89b6aba928bf80f4453d1c4ba8d2063 upstream.

On x86, atomic_cond_read_relaxed will busy-wait with a cpu_relax() loop,
so it is desirable to increase the number of times we spin on the qspinlock
lockword when it is found to be transitioning from pending to locked.

According to Waiman Long:

 | Ideally, the spinning times should be at least a few times the typical
 | cacheline load time from memory which I think can be down to 100ns or
 | so for each cacheline load with the newest systems or up to several
 | hundreds ns for older systems.

which in his benchmarking corresponded to 512 iterations.

Suggested-by: Waiman Long <longman@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-5-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Re-order code
Peter Zijlstra [Tue, 18 Dec 2018 17:13:58 +0000 (18:13 +0100)]
locking/qspinlock: Re-order code

commit 53bf57fab7321fb42b703056a4c80fc9d986d170 upstream.

Flip the branch condition after atomic_fetch_or_acquire(_Q_PENDING_VAL)
such that we loose the indent. This also result in a more natural code
flow IMO.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: andrea.parri@amarulasolutions.com
Cc: longman@redhat.com
Link: https://lkml.kernel.org/r/20181003130257.156322446@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Kill cmpxchg() loop when claiming lock from head of queue
Will Deacon [Tue, 18 Dec 2018 17:13:57 +0000 (18:13 +0100)]
locking/qspinlock: Kill cmpxchg() loop when claiming lock from head of queue

commit c61da58d8a9ba9238250a548f00826eaf44af0f7 upstream.

When a queued locker reaches the head of the queue, it claims the lock
by setting _Q_LOCKED_VAL in the lockword. If there isn't contention, it
must also clear the tail as part of this operation so that subsequent
lockers can avoid taking the slowpath altogether.

Currently this is expressed as a cmpxchg() loop that practically only
runs up to two iterations. This is confusing to the reader and unhelpful
to the compiler. Rewrite the cmpxchg() loop without the loop, so that a
failed cmpxchg() implies that there is contention and we just need to
write to _Q_LOCKED_VAL without considering the rest of the lockword.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-7-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Remove duplicate clear_pending() function from PV code
Will Deacon [Tue, 18 Dec 2018 17:13:56 +0000 (18:13 +0100)]
locking/qspinlock: Remove duplicate clear_pending() function from PV code

commit 3bea9adc96842b8a7345c7fb202c16ae9c8d5b25 upstream.

The native clear_pending() function is identical to the PV version, so the
latter can simply be removed.

This fixes the build for systems with >= 16K CPUs using the PV lock implementation.

Reported-by: Waiman Long <longman@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/20180427101619.GB21705@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Remove unbounded cmpxchg() loop from locking slowpath
Will Deacon [Tue, 18 Dec 2018 17:13:55 +0000 (18:13 +0100)]
locking/qspinlock: Remove unbounded cmpxchg() loop from locking slowpath

commit 59fb586b4a07b4e1a0ee577140ab4842ba451acd upstream.

The qspinlock locking slowpath utilises a "pending" bit as a simple form
of an embedded test-and-set lock that can avoid the overhead of explicit
queuing in cases where the lock is held but uncontended. This bit is
managed using a cmpxchg() loop which tries to transition the uncontended
lock word from (0,0,0) -> (0,0,1) or (0,0,1) -> (0,1,1).

Unfortunately, the cmpxchg() loop is unbounded and lockers can be starved
indefinitely if the lock word is seen to oscillate between unlocked
(0,0,0) and locked (0,0,1). This could happen if concurrent lockers are
able to take the lock in the cmpxchg() loop without queuing and pass it
around amongst themselves.

This patch fixes the problem by unconditionally setting _Q_PENDING_VAL
using atomic_fetch_or, and then inspecting the old value to see whether
we need to spin on the current lock owner, or whether we now effectively
hold the lock. The tricky scenario is when concurrent lockers end up
queuing on the lock and the lock becomes available, causing us to see
a lockword of (n,0,0). With pending now set, simply queuing could lead
to deadlock as the head of the queue may not have observed the pending
flag being cleared. Conversely, if the head of the queue did observe
pending being cleared, then it could transition the lock from (n,0,0) ->
(0,0,1) meaning that any attempt to "undo" our setting of the pending
bit could race with a concurrent locker trying to set it.

We handle this race by preserving the pending bit when taking the lock
after reaching the head of the queue and leaving the tail entry intact
if we saw pending set, because we know that the tail is going to be
updated shortly.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-6-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Merge 'struct __qspinlock' into 'struct qspinlock'
Will Deacon [Tue, 18 Dec 2018 17:13:54 +0000 (18:13 +0100)]
locking/qspinlock: Merge 'struct __qspinlock' into 'struct qspinlock'

commit 625e88be1f41b53cec55827c984e4a89ea8ee9f9 upstream.

'struct __qspinlock' provides a handy union of fields so that
subcomponents of the lockword can be accessed by name, without having to
manage shifts and masks explicitly and take endianness into account.

This is useful in qspinlock.h and also potentially in arch headers, so
move the 'struct __qspinlock' into 'struct qspinlock' and kill the extra
definition.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-3-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Bound spinning on pending->locked transition in slowpath
Will Deacon [Tue, 18 Dec 2018 17:13:53 +0000 (18:13 +0100)]
locking/qspinlock: Bound spinning on pending->locked transition in slowpath

commit 6512276d97b160d90b53285bd06f7f201459a7e3 upstream.

If a locker taking the qspinlock slowpath reads a lock value indicating
that only the pending bit is set, then it will spin whilst the
concurrent pending->locked transition takes effect.

Unfortunately, there is no guarantee that such a transition will ever be
observed since concurrent lockers could continuously set pending and
hand over the lock amongst themselves, leading to starvation. Whilst
this would probably resolve in practice, it means that it is not
possible to prove liveness properties about the lock and means that lock
acquisition time is unbounded.

Rather than removing the pending->locked spinning from the slowpath
altogether (which has been shown to heavily penalise a 2-threaded
locking stress test on x86), this patch replaces the explicit spinning
with a call to atomic_cond_read_relaxed and allows the architecture to
provide a bound on the number of spins. For architectures that can
respond to changes in cacheline state in their smp_cond_load implementation,
it should be sufficient to use the default bound of 1.

Suggested-by: Waiman Long <longman@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-4-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking/qspinlock: Ensure node is initialised before updating prev->next
Will Deacon [Tue, 18 Dec 2018 17:13:52 +0000 (18:13 +0100)]
locking/qspinlock: Ensure node is initialised before updating prev->next

commit 95bcade33a8af38755c9b0636e36a36ad3789fe6 upstream.

When a locker ends up queuing on the qspinlock locking slowpath, we
initialise the relevant mcs node and publish it indirectly by updating
the tail portion of the lock word using xchg_tail. If we find that there
was a pre-existing locker in the queue, we subsequently update their
->next field to point at our node so that we are notified when it's our
turn to take the lock.

This can be roughly illustrated as follows:

  /* Initialise the fields in node and encode a pointer to node in tail */
  tail = initialise_node(node);

  /*
   * Exchange tail into the lockword using an atomic read-modify-write
   * operation with release semantics
   */
  old = xchg_tail(lock, tail);

  /* If there was a pre-existing waiter ... */
  if (old & _Q_TAIL_MASK) {
prev = decode_tail(old);
smp_read_barrier_depends();

/* ... then update their ->next field to point to node.
WRITE_ONCE(prev->next, node);
  }

The conditional update of prev->next therefore relies on the address
dependency from the result of xchg_tail ensuring order against the
prior initialisation of node. However, since the release semantics of
the xchg_tail operation apply only to the write portion of the RmW,
then this ordering is not guaranteed and it is possible for the CPU
to return old before the writes to node have been published, consequently
allowing us to point prev->next to an uninitialised node.

This patch fixes the problem by making the update of prev->next a RELEASE
operation, which also removes the reliance on dependency ordering.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1518528177-19169-2-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolocking: Remove smp_read_barrier_depends() from queued_spin_lock_slowpath()
Paul E. McKenney [Tue, 18 Dec 2018 17:13:51 +0000 (18:13 +0100)]
locking: Remove smp_read_barrier_depends() from queued_spin_lock_slowpath()

commit 548095dea63ffc016d39c35b32c628d033638aca upstream.

Queued spinlocks are not used by DEC Alpha, and furthermore operations
such as READ_ONCE() and release/relaxed RMW atomics are being changed
to imply smp_read_barrier_depends().  This commit therefore removes the
now-redundant smp_read_barrier_depends() from queued_spin_lock_slowpath(),
and adjusts the comments accordingly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/build: Fix compiler support check for CONFIG_RETPOLINE
Masahiro Yamada [Wed, 5 Dec 2018 06:27:19 +0000 (15:27 +0900)]
x86/build: Fix compiler support check for CONFIG_RETPOLINE

commit 25896d073d8a0403b07e6dec56f58e6c33678207 upstream.

It is troublesome to add a diagnostic like this to the Makefile
parse stage because the top-level Makefile could be parsed with
a stale include/config/auto.conf.

Once you are hit by the error about non-retpoline compiler, the
compilation still breaks even after disabling CONFIG_RETPOLINE.

The easiest fix is to move this check to the "archprepare" like
this commit did:

  829fe4aa9ac1 ("x86: Allow generating user-space headers without a compiler")

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Fixes: 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support")
Link: http://lkml.kernel.org/r/1543991239-18476-1-git-send-email-yamada.masahiro@socionext.com
Link: https://lkml.org/lkml/2018/12/4/206
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Cc: Gi-Oh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/amdgpu: update SMC firmware image for polaris10 variants
Junwei Zhang [Fri, 7 Dec 2018 07:15:03 +0000 (15:15 +0800)]
drm/amdgpu: update SMC firmware image for polaris10 variants

commit d55d8be0747c96db28a1d08fc24d22ccd9b448ac upstream.

Some new variants require different firmwares.

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/i915/execlists: Apply a full mb before execution for Braswell
Chris Wilson [Thu, 6 Dec 2018 08:44:31 +0000 (08:44 +0000)]
drm/i915/execlists: Apply a full mb before execution for Braswell

commit cf66b8a0ba142fbd1bf10ac8f3ae92d1b0cb7b8f upstream.

Braswell is really picky about having our writes posted to memory before
we execute or else the GPU may see stale values. A wmb() is insufficient
as it only ensures the writes are visible to other cores, we need a full
mb() to ensure the writes are in memory and visible to the GPU.

The most frequent failure in flushing before execution is that we see
stale PTE values and execute the wrong pages.

References: 987abd5c62f9 ("drm/i915/execlists: Force write serialisation into context image vs execution")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181206084431.9805-3-chris@chris-wilson.co.uk
(cherry picked from commit 490b8c65b9db45896769e1095e78725775f47b3e)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoRevert "drm/rockchip: Allow driver to be shutdown on reboot/kexec"
Brian Norris [Wed, 5 Dec 2018 18:16:57 +0000 (10:16 -0800)]
Revert "drm/rockchip: Allow driver to be shutdown on reboot/kexec"

commit 63238173b2faf3d6b85a416f1c69af6c7be2413f upstream.

This reverts commit 7f3ef5dedb146e3d5063b6845781ad1bb59b92b5.

It causes new warnings [1] on shutdown when running the Google Kevin or
Scarlet (RK3399) boards under Chrome OS. Presumably our usage of DRM is
different than what Marc and Heiko test.

We're looking at a different approach (e.g., [2]) to replace this, but
IMO the revert should be taken first, as it already propagated to
-stable.

[1] Report here:
http://lkml.kernel.org/lkml/20181205030127.GA200921@google.com

WARNING: CPU: 4 PID: 2035 at drivers/gpu/drm/drm_mode_config.c:477 drm_mode_config_cleanup+0x1c4/0x294
...
 Call trace:
  drm_mode_config_cleanup+0x1c4/0x294
  rockchip_drm_unbind+0x4c/0x8c
  component_master_del+0x88/0xb8
  rockchip_drm_platform_remove+0x2c/0x44
  rockchip_drm_platform_shutdown+0x20/0x2c
  platform_drv_shutdown+0x2c/0x38
  device_shutdown+0x164/0x1b8
  kernel_restart_prepare+0x40/0x48
  kernel_restart+0x20/0x68
...
 Memory manager not clean during takedown.
 WARNING: CPU: 4 PID: 2035 at drivers/gpu/drm/drm_mm.c:950 drm_mm_takedown+0x34/0x44
...
  drm_mm_takedown+0x34/0x44
  rockchip_drm_unbind+0x64/0x8c
  component_master_del+0x88/0xb8
  rockchip_drm_platform_remove+0x2c/0x44
  rockchip_drm_platform_shutdown+0x20/0x2c
  platform_drv_shutdown+0x2c/0x38
  device_shutdown+0x164/0x1b8
  kernel_restart_prepare+0x40/0x48
  kernel_restart+0x20/0x68
...

[2] https://patchwork.kernel.org/patch/10556151/
    https://www.spinics.net/lists/linux-rockchip/msg21342.html
    [PATCH] drm/rockchip: shutdown drm subsystem on shutdown

Fixes: 7f3ef5dedb14 ("drm/rockchip: Allow driver to be shutdown on reboot/kexec")
Cc: Jeffy Chen <jeffy.chen@rock-chips.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Vicente Bergas <vicencb@gmail.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: stable@vger.kernel.org
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20181205181657.177703-1-briannorris@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/nouveau/kms: Fix memory leak in nv50_mstm_del()
Lyude Paul [Tue, 11 Dec 2018 23:56:20 +0000 (18:56 -0500)]
drm/nouveau/kms: Fix memory leak in nv50_mstm_del()

commit 24199c5436f267399afed0c4f1f57663c0408f57 upstream.

Noticed this while working on redoing the reference counting scheme in
the DP MST helpers. Nouveau doesn't attempt to call
drm_dp_mst_topology_mgr_destroy() at all, which leaves it leaking all of
the resources for drm_dp_mst_topology_mgr and it's children mstbs+ports.

Fixes: f479c0ba4a17 ("drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream")
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agopowerpc/msi: Fix NULL pointer access in teardown code
Radu Rendec [Wed, 28 Nov 2018 03:20:48 +0000 (22:20 -0500)]
powerpc/msi: Fix NULL pointer access in teardown code

commit 78e7b15e17ac175e7eed9e21c6f92d03d3b0a6fa upstream.

The arch_teardown_msi_irqs() function assumes that controller ops
pointers were already checked in arch_setup_msi_irqs(), but this
assumption is wrong: arch_teardown_msi_irqs() can be called even when
arch_setup_msi_irqs() returns an error (-ENOSYS).

This can happen in the following scenario:
  - msi_capability_init() calls pci_msi_setup_msi_irqs()
  - pci_msi_setup_msi_irqs() returns -ENOSYS
  - msi_capability_init() notices the error and calls free_msi_irqs()
  - free_msi_irqs() calls pci_msi_teardown_msi_irqs()

This is easier to see when CONFIG_PCI_MSI_IRQ_DOMAIN is not set and
pci_msi_setup_msi_irqs() and pci_msi_teardown_msi_irqs() are just
aliases to arch_setup_msi_irqs() and arch_teardown_msi_irqs().

The call to free_msi_irqs() upon pci_msi_setup_msi_irqs() failure
seems legit, as it does additional cleanup; e.g.
list_del(&entry->list) and kfree(entry) inside free_msi_irqs() do
happen (MSI descriptors are allocated before pci_msi_setup_msi_irqs()
is called and need to be cleaned up if that fails).

Fixes: 6b2fd7efeb88 ("PCI/MSI/PPC: Remove arch_msi_check_device()")
Cc: stable@vger.kernel.org # v3.18+
Signed-off-by: Radu Rendec <radu.rendec@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotracing: Fix memory leak of instance function hash filters
Steven Rostedt (VMware) [Tue, 11 Dec 2018 04:58:01 +0000 (23:58 -0500)]
tracing: Fix memory leak of instance function hash filters

commit 2840f84f74035e5a535959d5f17269c69fa6edc5 upstream.

The following commands will cause a memory leak:

 # cd /sys/kernel/tracing
 # mkdir instances/foo
 # echo schedule > instance/foo/set_ftrace_filter
 # rmdir instances/foo

The reason is that the hashes that hold the filters to set_ftrace_filter and
set_ftrace_notrace are not freed if they contain any data on the instance
and the instance is removed.

Found by kmemleak detector.

Cc: stable@vger.kernel.org
Fixes: 591dffdade9f ("ftrace: Allow for function tracing instance to filter functions")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotracing: Fix memory leak in set_trigger_filter()
Steven Rostedt (VMware) [Mon, 10 Dec 2018 02:17:30 +0000 (21:17 -0500)]
tracing: Fix memory leak in set_trigger_filter()

commit 3cec638b3d793b7cacdec5b8072364b41caeb0e1 upstream.

When create_event_filter() fails in set_trigger_filter(), the filter may
still be allocated and needs to be freed. The caller expects the
data->filter to be updated with the new filter, even if the new filter
failed (we could add an error message by setting set_str parameter of
create_event_filter(), but that's another update).

But because the error would just exit, filter was left hanging and
nothing could free it.

Found by kmemleak detector.

Cc: stable@vger.kernel.org
Fixes: bac5fb97a173a ("tracing: Add and use generic set_trigger_filter() implementation")
Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodm cache metadata: verify cache has blocks in blocks_are_clean_separate_dirty()
Mike Snitzer [Fri, 9 Nov 2018 16:56:03 +0000 (11:56 -0500)]
dm cache metadata: verify cache has blocks in blocks_are_clean_separate_dirty()

commit 687cf4412a343a63928a5c9d91bdc0f522939d43 upstream.

Otherwise dm_bitset_cursor_begin() return -ENODATA.  Other calls to
dm_bitset_cursor_begin() have similar negative checks.

Fixes inability to create a cache in passthrough mode (even though doing
so makes no sense).

Fixes: 0d963b6e65 ("dm cache metadata: fix metadata2 format's blocks_are_clean_separate_dirty")
Cc: stable@vger.kernel.org
Reported-by: David Teigland <teigland@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodm thin: send event about thin-pool state change _after_ making it
Mike Snitzer [Tue, 11 Dec 2018 18:31:40 +0000 (13:31 -0500)]
dm thin: send event about thin-pool state change _after_ making it

commit f6c367585d0d851349d3a9e607c43e5bea993fa1 upstream.

Sending a DM event before a thin-pool state change is about to happen is
a bug.  It wasn't realized until it became clear that userspace response
to the event raced with the actual state change that the event was
meant to notify about.

Fix this by first updating internal thin-pool state to reflect what the
DM event is being issued about.  This fixes a long-standing racey/buggy
userspace device-mapper-test-suite 'resize_io' test that would get an
event but not find the state it was looking for -- so it would just go
on to hang because no other events caused the test to reevaluate the
thin-pool's state.

Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoARM: mmp/mmp2: fix cpu_is_mmp2() on mmp2-dt
Lubomir Rintel [Sun, 2 Dec 2018 11:12:24 +0000 (12:12 +0100)]
ARM: mmp/mmp2: fix cpu_is_mmp2() on mmp2-dt

commit 76f4e2c3b6a560cdd7a75b87df543e04d05a9e5f upstream.

cpu_is_mmp2() was equivalent to cpu_is_pj4(), wouldn't be correct for
multiplatform kernels. Fix it by also considering mmp_chip_id, as is
done for cpu_is_pxa168() and cpu_is_pxa910() above.

Moreover, it is only available with CONFIG_CPU_MMP2 and thus doesn't work
on DT-based MMP2 machines. Enable it on CONFIG_MACH_MMP2_DT too.

Note: CONFIG_CPU_MMP2 is only used for machines that use board files
instead of DT. It should perhaps be renamed. I'm not doing it now, because
I don't have a better idea.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agofuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS
Chad Austin [Mon, 10 Dec 2018 18:54:52 +0000 (10:54 -0800)]
fuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS

commit 2e64ff154ce6ce9a8dc0f9556463916efa6ff460 upstream.

When FUSE_OPEN returns ENOSYS, the no_open bit is set on the connection.

Because the FUSE_RELEASE and FUSE_RELEASEDIR paths share code, this
incorrectly caused the FUSE_RELEASEDIR request to be dropped and never sent
to userspace.

Pass an isdir bool to distinguish between FUSE_RELEASE and FUSE_RELEASEDIR
inside of fuse_file_put.

Fixes: 7678ac50615d ("fuse: support clients that don't implement 'open'")
Cc: <stable@vger.kernel.org> # v3.14
Signed-off-by: Chad Austin <chadaustin@fb.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>