platform/kernel/linux-rpi.git
4 years agoblock: fix single range discard merge
Ming Lei [Fri, 30 Nov 2018 16:38:18 +0000 (00:38 +0800)]
block: fix single range discard merge

commit 2a5cf35cd6c56b2924bce103413ad3381bdc31fa upstream.

There are actually two kinds of discard merge:

- one is the normal discard merge, just like normal read/write request,
and call it single-range discard

- another is the multi-range discard, queue_max_discard_segments(rq->q) > 1

For the former case, queue_max_discard_segments(rq->q) is 1, and we
should handle this kind of discard merge like the normal read/write
request.

This patch fixes the following kernel panic issue[1], which is caused by
not removing the single-range discard request from elevator queue.

Guangwu has one raid discard test case, in which this issue is a bit
easier to trigger, and I verified that this patch can fix the kernel
panic issue in Guangwu's test case.

[1] kernel panic log from Jens's report

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000148
 PGD 0 P4D 0.
 Oops: 0000 [#1] SMP PTI
 CPU: 37 PID: 763 Comm: kworker/37:1H Not tainted \
4.20.0-rc3-00649-ge64d9a554a91-dirty #14  Hardware name: Wiwynn \
Leopard-Orv2/Leopard-DDR BW, BIOS LBM08   03/03/2017       Workqueue: kblockd \
blk_mq_run_work_fn                                            RIP: \
0010:blk_mq_get_driver_tag+0x81/0x120                                       Code: 24 \
10 48 89 7c 24 20 74 21 83 fa ff 0f 95 c0 48 8b 4c 24 28 65 48 33 0c 25 28 00 00 00 \
0f 85 96 00 00 00 48 83 c4 30 5b 5d c3 <48> 8b 87 48 01 00 00 8b 40 04 39 43 20 72 37 \
f6 87 b0 00 00 00 02  RSP: 0018:ffffc90004aabd30 EFLAGS: 00010246                     \
  RAX: 0000000000000003 RBX: ffff888465ea1300 RCX: ffffc90004aabde8
 RDX: 00000000ffffffff RSI: ffffc90004aabde8 RDI: 0000000000000000
 RBP: 0000000000000000 R08: ffff888465ea1348 R09: 0000000000000000
 R10: 0000000000001000 R11: 00000000ffffffff R12: ffff888465ea1300
 R13: 0000000000000000 R14: ffff888465ea1348 R15: ffff888465d10000
 FS:  0000000000000000(0000) GS:ffff88846f9c0000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000148 CR3: 000000000220a003 CR4: 00000000003606e0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 Call Trace:
  blk_mq_dispatch_rq_list+0xec/0x480
  ? elv_rb_del+0x11/0x30
  blk_mq_do_dispatch_sched+0x6e/0xf0
  blk_mq_sched_dispatch_requests+0xfa/0x170
  __blk_mq_run_hw_queue+0x5f/0xe0
  process_one_work+0x154/0x350
  worker_thread+0x46/0x3c0
  kthread+0xf5/0x130
  ? process_one_work+0x350/0x350
  ? kthread_destroy_worker+0x50/0x50
  ret_from_fork+0x1f/0x30
 Modules linked in: sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel \
kvm switchtec irqbypass iTCO_wdt iTCO_vendor_support efivars cdc_ether usbnet mii \
cdc_acm i2c_i801 lpc_ich mfd_core ipmi_si ipmi_devintf ipmi_msghandler acpi_cpufreq \
button sch_fq_codel nfsd nfs_acl lockd grace auth_rpcgss oid_registry sunrpc nvme \
nvme_core fuse sg loop efivarfs autofs4  CR2: 0000000000000148                        \

 ---[ end trace 340a1fb996df1b9b ]---
 RIP: 0010:blk_mq_get_driver_tag+0x81/0x120
 Code: 24 10 48 89 7c 24 20 74 21 83 fa ff 0f 95 c0 48 8b 4c 24 28 65 48 33 0c 25 28 \
00 00 00 0f 85 96 00 00 00 48 83 c4 30 5b 5d c3 <48> 8b 87 48 01 00 00 8b 40 04 39 43 \
20 72 37 f6 87 b0 00 00 00 02

Fixes: 445251d0f4d329a ("blk-mq: fix discard merge with scheduler attached")
Reported-by: Jens Axboe <axboe@kernel.dk>
Cc: Guangwu Zhang <guazhang@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Andre Tomt <andre@tomt.net>
Cc: Jack Wang <jack.wang.usish@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoreiserfs: fix extended attributes on the root directory
Jeff Mahoney [Thu, 24 Oct 2019 14:31:27 +0000 (10:31 -0400)]
reiserfs: fix extended attributes on the root directory

commit 60e4cf67a582d64f07713eda5fcc8ccdaf7833e6 upstream.

Since commit d0a5b995a308 (vfs: Add IOP_XATTR inode operations flag)
extended attributes haven't worked on the root directory in reiserfs.

This is due to reiserfs conditionally setting the sb->s_xattrs handler
array depending on whether it located or create the internal privroot
directory.  It necessarily does this after the root inode is already
read in.  The IOP_XATTR flag is set during inode initialization, so
it never gets set on the root directory.

This commit unconditionally assigns sb->s_xattrs and clears IOP_XATTR on
internal inodes.  The old return values due to the conditional assignment
are handled via open_xa_root, which now returns EOPNOTSUPP as the VFS
would have done.

Link: https://lore.kernel.org/r/20191024143127.17509-1-jeffm@suse.com
CC: stable@vger.kernel.org
Fixes: d0a5b995a308 ("vfs: Add IOP_XATTR inode operations flag")
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoext4: Fix credit estimate for final inode freeing
Jan Kara [Tue, 5 Nov 2019 16:44:12 +0000 (17:44 +0100)]
ext4: Fix credit estimate for final inode freeing

commit 65db869c754e7c271691dd5feabf884347e694f5 upstream.

Estimate for the number of credits needed for final freeing of inode in
ext4_evict_inode() was to small. We may modify 4 blocks (inode & sb for
orphan deletion, bitmap & group descriptor for inode freeing) and not
just 3.

[ Fixed minor whitespace nit. -- TYT ]

Fixes: e50e5129f384 ("ext4: xattr-in-inode support")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-6-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoquota: fix livelock in dquot_writeback_dquots
Dmitry Monakhov [Thu, 31 Oct 2019 10:39:19 +0000 (10:39 +0000)]
quota: fix livelock in dquot_writeback_dquots

commit 6ff33d99fc5c96797103b48b7b0902c296f09c05 upstream.

Write only quotas which are dirty at entry.

XFSTEST: https://github.com/dmonakhov/xfstests/commit/b10ad23566a5bf75832a6f500e1236084083cddc

Link: https://lore.kernel.org/r/20191031103920.3919-1-dmonakhov@openvz.org
CC: stable@vger.kernel.org
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoext2: check err when partial != NULL
Chengguang Xu [Tue, 5 Nov 2019 04:51:00 +0000 (12:51 +0800)]
ext2: check err when partial != NULL

commit e705f4b8aa27a59f8933e8f384e9752f052c469c upstream.

Check err when partial == NULL is meaningless because
partial == NULL means getting branch successfully without
error.

CC: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191105045100.7104-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoquota: Check that quota is not dirty before release
Dmitry Monakhov [Thu, 31 Oct 2019 10:39:20 +0000 (10:39 +0000)]
quota: Check that quota is not dirty before release

commit df4bb5d128e2c44848aeb36b7ceceba3ac85080d upstream.

There is a race window where quota was redirted once we drop dq_list_lock inside dqput(),
but before we grab dquot->dq_lock inside dquot_release()

TASK1                                                       TASK2 (chowner)
->dqput()
  we_slept:
    spin_lock(&dq_list_lock)
    if (dquot_dirty(dquot)) {
          spin_unlock(&dq_list_lock);
          dquot->dq_sb->dq_op->write_dquot(dquot);
          goto we_slept
    if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
          spin_unlock(&dq_list_lock);
          dquot->dq_sb->dq_op->release_dquot(dquot);
                                                            dqget()
    mark_dquot_dirty()
    dqput()
          goto we_slept;
        }
So dquot dirty quota will be released by TASK1, but on next we_sleept loop
we detect this and call ->write_dquot() for it.
XFSTEST: https://github.com/dmonakhov/xfstests/commit/440a80d4cbb39e9234df4d7240aee1d551c36107

Link: https://lore.kernel.org/r/20191031103920.3919-2-dmonakhov@openvz.org
CC: stable@vger.kernel.org
Signed-off-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agovideo/hdmi: Fix AVI bar unpack
Ville Syrjälä [Thu, 19 Sep 2019 13:28:53 +0000 (16:28 +0300)]
video/hdmi: Fix AVI bar unpack

commit 6039f37dd6b76641198e290f26b31c475248f567 upstream.

The bar values are little endian, not big endian. The pack
function did it right but the unpack got it wrong. Fix it.

Cc: stable@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: Martin Bugge <marbugge@cisco.com>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fixes: 2c676f378edb ("[media] hdmi: added unpack and logging functions for InfoFrames")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190919132853.30954-1-ville.syrjala@linux.intel.com
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopowerpc/xive: Skip ioremap() of ESB pages for LSI interrupts
Cédric Le Goater [Tue, 3 Dec 2019 16:36:42 +0000 (17:36 +0100)]
powerpc/xive: Skip ioremap() of ESB pages for LSI interrupts

commit b67a95f2abff0c34e5667c15ab8900de73d8d087 upstream.

The PCI INTx interrupts and other LSI interrupts are handled differently
under a sPAPR platform. When the interrupt source characteristics are
queried, the hypervisor returns an H_INT_ESB flag to inform the OS
that it should be using the H_INT_ESB hcall for interrupt management
and not loads and stores on the interrupt ESB pages.

A default -1 value is returned for the addresses of the ESB pages. The
driver ignores this condition today and performs a bogus IO mapping.
Recent changes and the DEBUG_VM configuration option make the bug
visible with :

  kernel BUG at arch/powerpc/include/asm/book3s/64/pgtable.h:612!
  Oops: Exception in kernel mode, sig: 5 [#1]
  LE PAGE_SIZE=64K MMU=Radix MMU=Hash SMP NR_CPUS=1024 NUMA pSeries
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-0.rc6.git0.1.fc32.ppc64le #1
  NIP:  c000000000f63294 LR: c000000000f62e44 CTR: 0000000000000000
  REGS: c0000000fa45f0d0 TRAP: 0700   Not tainted  (5.4.0-0.rc6.git0.1.fc32.ppc64le)
  ...
  NIP ioremap_page_range+0x4c4/0x6e0
  LR  ioremap_page_range+0x74/0x6e0
  Call Trace:
    ioremap_page_range+0x74/0x6e0 (unreliable)
    do_ioremap+0x8c/0x120
    __ioremap_caller+0x128/0x140
    ioremap+0x30/0x50
    xive_spapr_populate_irq_data+0x170/0x260
    xive_irq_domain_map+0x8c/0x170
    irq_domain_associate+0xb4/0x2d0
    irq_create_mapping+0x1e0/0x3b0
    irq_create_fwspec_mapping+0x27c/0x3e0
    irq_create_of_mapping+0x98/0xb0
    of_irq_parse_and_map_pci+0x168/0x230
    pcibios_setup_device+0x88/0x250
    pcibios_setup_bus_devices+0x54/0x100
    __of_scan_bus+0x160/0x310
    pcibios_scan_phb+0x330/0x390
    pcibios_init+0x8c/0x128
    do_one_initcall+0x60/0x2c0
    kernel_init_freeable+0x290/0x378
    kernel_init+0x2c/0x148
    ret_from_kernel_thread+0x5c/0x80

Fixes: bed81ee181dd ("powerpc/xive: introduce H_INT_ESB hcall")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191203163642.2428-1-clg@kaod.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopowerpc: Allow flush_icache_range to work across ranges >4GB
Alastair D'Silva [Mon, 4 Nov 2019 02:32:53 +0000 (13:32 +1100)]
powerpc: Allow flush_icache_range to work across ranges >4GB

commit 29430fae82073d39b1b881a3cd507416a56a363f upstream.

When calling flush_icache_range with a size >4GB, we were masking
off the upper 32 bits, so we would incorrectly flush a range smaller
than intended.

This patch replaces the 32 bit shifts with 64 bit ones, so that
the full size is accounted for.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Cc: stable@vger.kernel.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191104023305.9581-2-alastair@au1.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopowerpc/xive: Prevent page fault issues in the machine crash handler
Cédric Le Goater [Thu, 31 Oct 2019 06:31:00 +0000 (07:31 +0100)]
powerpc/xive: Prevent page fault issues in the machine crash handler

commit 1ca3dec2b2dff9d286ce6cd64108bda0e98f9710 upstream.

When the machine crash handler is invoked, all interrupts are masked
but interrupts which have not been started yet do not have an ESB page
mapped in the Linux address space. This crashes the 'crash kexec'
sequence on sPAPR guests.

To fix, force the mapping of the ESB page when an interrupt is being
mapped in the Linux IRQ number space. This is done by setting the
initial state of the interrupt to OFF which is not necessarily the
case on PowerNV.

Fixes: 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191031063100.3864-1-clg@kaod.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopowerpc: Allow 64bit VDSO __kernel_sync_dicache to work across ranges >4GB
Alastair D'Silva [Mon, 4 Nov 2019 02:32:54 +0000 (13:32 +1100)]
powerpc: Allow 64bit VDSO __kernel_sync_dicache to work across ranges >4GB

commit f9ec11165301982585e5e5f606739b5bae5331f3 upstream.

When calling __kernel_sync_dicache with a size >4GB, we were masking
off the upper 32 bits, so we would incorrectly flush a range smaller
than intended.

This patch replaces the 32 bit shifts with 64 bit ones, so that
the full size is accounted for.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Cc: stable@vger.kernel.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191104023305.9581-3-alastair@au1.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoppdev: fix PPGETTIME/PPSETTIME ioctls
Arnd Bergmann [Fri, 8 Nov 2019 20:34:30 +0000 (21:34 +0100)]
ppdev: fix PPGETTIME/PPSETTIME ioctls

commit 998174042da229e2cf5841f574aba4a743e69650 upstream.

Going through the uses of timeval in the user space API,
I noticed two bugs in ppdev that were introduced in the y2038
conversion:

* The range check was accidentally moved from ppsettime to
  ppgettime

* On sparc64, the microseconds are in the other half of the
  64-bit word.

Fix both, and mark the fix for stable backports.

Cc: stable@vger.kernel.org
Fixes: 3b9ab374a1e6 ("ppdev: convert to y2038 safe")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191108203435.112759-8-arnd@arndb.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoARM: dts: omap3-tao3530: Fix incorrect MMC card detection GPIO polarity
Jarkko Nikula [Sat, 16 Nov 2019 15:16:51 +0000 (17:16 +0200)]
ARM: dts: omap3-tao3530: Fix incorrect MMC card detection GPIO polarity

commit 287897f9aaa2ad1c923d9875914f57c4dc9159c8 upstream.

The MMC card detection GPIO polarity is active low on TAO3530, like in many
other similar boards. Now the card is not detected and it is unable to
mount rootfs from an SD card.

Fix this by using the correct polarity.

This incorrect polarity was defined already in the commit 30d95c6d7092
("ARM: dts: omap3: Add Technexion TAO3530 SOM omap3-tao3530.dtsi") in v3.18
kernel and later changed to use defined GPIO constants in v4.4 kernel by
the commit 3a637e008e54 ("ARM: dts: Use defined GPIO constants in flags
cell for OMAP2+ boards").

While the latter commit did not introduce the issue I'm marking it with
Fixes tag due the v4.4 kernels still being maintained.

Fixes: 3a637e008e54 ("ARM: dts: Use defined GPIO constants in flags cell for OMAP2+ boards")
Cc: linux-stable <stable@vger.kernel.org> # 4.4+
Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agommc: host: omap_hsmmc: add code for special init of wl1251 to get rid of pandora_wl12...
H. Nikolaus Schaller [Thu, 7 Nov 2019 10:30:37 +0000 (11:30 +0100)]
mmc: host: omap_hsmmc: add code for special init of wl1251 to get rid of pandora_wl1251_init_card

commit f6498b922e57aecbe3b7fa30a308d9d586c0c369 upstream.

Pandora_wl1251_init_card was used to do special pdata based
setup of the sdio mmc interface. This does no longer work with
v4.7 and later. A fix requires a device tree based mmc3 setup.

Therefore we move the special setup to omap_hsmmc.c instead
of calling some pdata supplied init_card function.

The new code checks for a DT child node compatible to wl1251
so it will not affect other MMC3 use cases.

Generally, this code was and still is a hack and should be
moved to mmc core to e.g. read such properties from optional
DT child nodes.

Fixes: 81eef6ca9201 ("mmc: omap_hsmmc: Use dma_request_chan() for requesting DMA channel")
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Cc: <stable@vger.kernel.org> # v4.7+
[Ulf: Fixed up some checkpatch complaints]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: samsung: Fix device node refcount leaks in S3C64xx wakeup controller init
Krzysztof Kozlowski [Mon, 5 Aug 2019 16:27:09 +0000 (18:27 +0200)]
pinctrl: samsung: Fix device node refcount leaks in S3C64xx wakeup controller init

commit 7f028caadf6c37580d0f59c6c094ed09afc04062 upstream.

In s3c64xx_eint_eint0_init() the for_each_child_of_node() loop is used
with a break to find a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: 61dd72613177 ("pinctrl: Add pinctrl-s3c64xx driver")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: samsung: Fix device node refcount leaks in init code
Krzysztof Kozlowski [Mon, 5 Aug 2019 16:27:10 +0000 (18:27 +0200)]
pinctrl: samsung: Fix device node refcount leaks in init code

commit a322b3377f4bac32aa25fb1acb9e7afbbbbd0137 upstream.

Several functions use for_each_child_of_node() loop with a break to find
a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: 9a2c1c3b91aa ("pinctrl: samsung: Allow grouping multiple pinmux/pinconf nodes")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: samsung: Fix device node refcount leaks in S3C24xx wakeup controller init
Krzysztof Kozlowski [Mon, 5 Aug 2019 16:27:08 +0000 (18:27 +0200)]
pinctrl: samsung: Fix device node refcount leaks in S3C24xx wakeup controller init

commit 6fbbcb050802d6ea109f387e961b1dbcc3a80c96 upstream.

In s3c24xx_eint_init() the for_each_child_of_node() loop is used with a
break to find a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: af99a7507469 ("pinctrl: Add pinctrl-s3c24xx driver")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: samsung: Fix device node refcount leaks in Exynos wakeup controller init
Krzysztof Kozlowski [Mon, 5 Aug 2019 16:27:07 +0000 (18:27 +0200)]
pinctrl: samsung: Fix device node refcount leaks in Exynos wakeup controller init

commit 5c7f48dd14e892e3e920dd6bbbd52df79e1b3b41 upstream.

In exynos_eint_wkup_init() the for_each_child_of_node() loop is used
with a break to find a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: 43b169db1841 ("pinctrl: add exynos4210 specific extensions for samsung pinctrl driver")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: samsung: Add of_node_put() before return in error path
Nishka Dasgupta [Sun, 4 Aug 2019 16:02:00 +0000 (21:32 +0530)]
pinctrl: samsung: Add of_node_put() before return in error path

commit 3d2557ab75d4c568c79eefa2e550e0d80348a6bd upstream.

Each iteration of for_each_child_of_node puts the previous node, but in
the case of a return from the middle of the loop, there is no put, thus
causing a memory leak. Hence add an of_node_put before the return of
exynos_eint_wkup_init() error path.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Cc: <stable@vger.kernel.org>
Fixes: 14c255d35b25 ("pinctrl: exynos: Add irq_chip instance for Exynos7 wakeup interrupts")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agopinctrl: armada-37xx: Fix irq mask access in armada_37xx_irq_set_type()
Gregory CLEMENT [Fri, 15 Nov 2019 15:57:52 +0000 (16:57 +0100)]
pinctrl: armada-37xx: Fix irq mask access in armada_37xx_irq_set_type()

commit 04fb02757ae5188031eb71b2f6f189edb1caf5dc upstream.

As explained in the following commit a9a1a4833613 ("pinctrl:
armada-37xx: Fix gpio interrupt setup") the armada_37xx_irq_set_type()
function can be called before the initialization of the mask field.

That means that we can't use this field in this function and need to
workaround it using hwirq.

Fixes: 30ac0d3b0702 ("pinctrl: armada-37xx: Add edge both type gpio irq support")
Cc: stable@vger.kernel.org
Reported-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191115155752.2562-1-gregory.clement@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoACPI: PM: Avoid attaching ACPI PM domain to certain devices
Rafael J. Wysocki [Wed, 4 Dec 2019 01:54:27 +0000 (02:54 +0100)]
ACPI: PM: Avoid attaching ACPI PM domain to certain devices

commit b9ea0bae260f6aae546db224daa6ac1bd9d94b91 upstream.

Certain ACPI-enumerated devices represented as platform devices in
Linux, like fans, require special low-level power management handling
implemented by their drivers that is not in agreement with the ACPI
PM domain behavior.  That leads to problems with managing ACPI fans
during system-wide suspend and resume.

For this reason, make acpi_dev_pm_attach() skip the affected devices
by adding a list of device IDs to avoid to it and putting the IDs of
the affected devices into that list.

Fixes: e5cc8ef31267 (ACPI / PM: Provide ACPI PM callback routines for subsystems)
Reported-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com>
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoACPI: bus: Fix NULL pointer check in acpi_bus_get_private_data()
Vamshi K Sthambamkadi [Thu, 28 Nov 2019 10:28:29 +0000 (15:58 +0530)]
ACPI: bus: Fix NULL pointer check in acpi_bus_get_private_data()

commit 627ead724eff33673597216f5020b72118827de4 upstream.

kmemleak reported backtrace:
    [<bbee0454>] kmem_cache_alloc_trace+0x128/0x260
    [<6677f215>] i2c_acpi_install_space_handler+0x4b/0xe0
    [<1180f4fc>] i2c_register_adapter+0x186/0x400
    [<6083baf7>] i2c_add_adapter+0x4e/0x70
    [<a3ddf966>] intel_gmbus_setup+0x1a2/0x2c0 [i915]
    [<84cb69ae>] i915_driver_probe+0x8d8/0x13a0 [i915]
    [<81911d4b>] i915_pci_probe+0x48/0x160 [i915]
    [<4b159af1>] pci_device_probe+0xdc/0x160
    [<b3c64704>] really_probe+0x1ee/0x450
    [<bc029f5a>] driver_probe_device+0x142/0x1b0
    [<d8829d20>] device_driver_attach+0x49/0x50
    [<de71f045>] __driver_attach+0xc9/0x150
    [<df33ac83>] bus_for_each_dev+0x56/0xa0
    [<80089bba>] driver_attach+0x19/0x20
    [<cc73f583>] bus_add_driver+0x177/0x220
    [<7b29d8c7>] driver_register+0x56/0xf0

In i2c_acpi_remove_space_handler(), a leak occurs whenever the
"data" parameter is initialized to 0 before being passed to
acpi_bus_get_private_data().

This is because the NULL pointer check in acpi_bus_get_private_data()
(condition->if(!*data)) returns EINVAL and, in consequence, memory is
never freed in i2c_acpi_remove_space_handler().

Fix the NULL pointer check in acpi_bus_get_private_data() to follow
the analogous check in acpi_get_data_full().

Signed-off-by: Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com>
[ rjw: Subject & changelog ]
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoACPI: OSL: only free map once in osl.c
Francesco Ruggeri [Wed, 20 Nov 2019 05:47:27 +0000 (21:47 -0800)]
ACPI: OSL: only free map once in osl.c

commit 833a426cc471b6088011b3d67f1dc4e147614647 upstream.

acpi_os_map_cleanup checks map->refcount outside of acpi_ioremap_lock
before freeing the map. This creates a race condition the can result
in the map being freed more than once.
A panic can be caused by running

for ((i=0; i<10; i++))
do
        for ((j=0; j<100000; j++))
        do
                cat /sys/firmware/acpi/tables/data/BERT >/dev/null
        done &
done

This patch makes sure that only the process that drops the reference
to 0 does the freeing.

Fixes: b7c1fadd6c2e ("ACPI: Do not use krefs under a mutex in osl.c")
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoACPI / hotplug / PCI: Allocate resources directly under the non-hotplug bridge
Mika Westerberg [Wed, 30 Oct 2019 15:05:45 +0000 (18:05 +0300)]
ACPI / hotplug / PCI: Allocate resources directly under the non-hotplug bridge

commit 77adf9355304f8dcf09054280af5e23fc451ab3d upstream.

Valerio and others reported that commit 84c8b58ed3ad ("ACPI / hotplug /
PCI: Don't scan bridges managed by native hotplug") prevents some recent
LG and HP laptops from booting with endless loop of:

  ACPI Error: No handler or method for GPE 08, disabling event (20190215/evgpe-835)
  ACPI Error: No handler or method for GPE 09, disabling event (20190215/evgpe-835)
  ACPI Error: No handler or method for GPE 0A, disabling event (20190215/evgpe-835)
  ...

What seems to happen is that during boot, after the initial PCI enumeration
when EC is enabled the platform triggers ACPI Notify() to one of the root
ports. The root port itself looks like this:

  pci 0000:00:1b.0: PCI bridge to [bus 02-3a]
  pci 0000:00:1b.0:   bridge window [mem 0xc4000000-0xda0fffff]
  pci 0000:00:1b.0:   bridge window [mem 0x80000000-0xa1ffffff 64bit pref]

The BIOS has configured the root port so that it does not have I/O bridge
window.

Now when the ACPI Notify() is triggered ACPI hotplug handler calls
acpiphp_native_scan_bridge() for each non-hotplug bridge (as this system is
using native PCIe hotplug) and pci_assign_unassigned_bridge_resources() to
allocate resources.

The device connected to the root port is a PCIe switch (Thunderbolt
controller) with two hotplug downstream ports. Because of the hotplug ports
__pci_bus_size_bridges() tries to add "additional I/O" of 256 bytes to each
(DEFAULT_HOTPLUG_IO_SIZE). This gets further aligned to 4k as that's the
minimum I/O window size so each hotplug port gets 4k I/O window and the
same happens for the root port (which is also hotplug port). This means
3 * 4k = 12k I/O window.

Because of this pci_assign_unassigned_bridge_resources() ends up opening a
I/O bridge window for the root port at first available I/O address which
seems to be in range 0x1000 - 0x3fff. Normally this range is used for ACPI
stuff such as GPE bits (below is part of /proc/ioports):

    1800-1803 : ACPI PM1a_EVT_BLK
    1804-1805 : ACPI PM1a_CNT_BLK
    1808-180b : ACPI PM_TMR
    1810-1815 : ACPI CPU throttle
    1850-1850 : ACPI PM2_CNT_BLK
    1854-1857 : pnp 00:05
    1860-187f : ACPI GPE0_BLK

However, when the ACPI Notify() happened this range was not yet reserved
for ACPI/PNP (that happens later) so PCI gets it. It then starts writing to
this range and accidentally stomps over GPE bits among other things causing
the endless stream of messages about missing GPE handler.

This problem does not happen if "pci=hpiosize=0" is passed in the kernel
command line. The reason is that then the kernel does not try to allocate
the additional 256 bytes for each hotplug port.

Fix this by allocating resources directly below the non-hotplug bridges
where a new device may appear as a result of ACPI Notify(). This avoids the
hotplug bridges and prevents opening the additional I/O window.

Fixes: 84c8b58ed3ad ("ACPI / hotplug / PCI: Don't scan bridges managed by native hotplug")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203617
Link: https://lore.kernel.org/r/20191030150545.19885-1-mika.westerberg@linux.intel.com
Reported-by: Valerio Passini <passini.valerio@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agocpufreq: powernv: fix stack bloat and hard limit on number of CPUs
John Hubbard [Thu, 31 Oct 2019 05:21:59 +0000 (22:21 -0700)]
cpufreq: powernv: fix stack bloat and hard limit on number of CPUs

commit db0d32d84031188443e25edbd50a71a6e7ac5d1d upstream.

The following build warning occurred on powerpc 64-bit builds:

drivers/cpufreq/powernv-cpufreq.c: In function 'init_chip_info':
drivers/cpufreq/powernv-cpufreq.c:1070:1: warning: the frame size of
1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]

This is with a cross-compiler based on gcc 8.1.0, which I got from:
  https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/8.1.0/

The warning is due to putting 1024 bytes on the stack:

    unsigned int chip[256];

...and it's also undesirable to have a hard limit on the number of
CPUs here.

Fix both problems by dynamically allocating based on num_possible_cpus,
as recommended by Michael Ellerman.

Fixes: 053819e0bf840 ("cpufreq: powernv: Handle throttling due to Pmax capping at chip level")
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoPM / devfreq: Lock devfreq in trans_stat_show
Leonard Crestez [Tue, 24 Sep 2019 07:52:23 +0000 (10:52 +0300)]
PM / devfreq: Lock devfreq in trans_stat_show

commit 2abb0d5268ae7b5ddf82099b1f8d5aa8414637d4 upstream.

There is no locking in this sysfs show function so stats printing can
race with a devfreq_update_status called as part of freq switching or
with initialization.

Also add an assert in devfreq_update_status to make it clear that lock
must be held by caller.

Fixes: 39688ce6facd ("PM / devfreq: account suspend/resume for stats")
Cc: stable@vger.kernel.org
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agointel_th: pci: Add Tiger Lake CPU support
Alexander Shishkin [Wed, 20 Nov 2019 13:08:06 +0000 (15:08 +0200)]
intel_th: pci: Add Tiger Lake CPU support

commit 6e6c18bcb78c0dc0601ebe216bed12c844492d0c upstream.

This adds support for the Trace Hub in Tiger Lake CPU.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191120130806.44028-4-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agointel_th: pci: Add Ice Lake CPU support
Alexander Shishkin [Wed, 20 Nov 2019 13:08:05 +0000 (15:08 +0200)]
intel_th: pci: Add Ice Lake CPU support

commit 6a1743422a7c0fda26764a544136cac13e5ae486 upstream.

This adds support for the Trace Hub in Ice Lake CPU.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191120130806.44028-3-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agointel_th: Fix a double put_device() in error path
Alexander Shishkin [Wed, 20 Nov 2019 13:08:04 +0000 (15:08 +0200)]
intel_th: Fix a double put_device() in error path

commit 512592779a337feb5905d8fcf9498dbf33672d4a upstream.

Commit a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices")
factored out intel_th_subdevice_alloc() from intel_th_populate(), but got
the error path wrong, resulting in two instances of a double put_device()
on a freshly initialized, but not 'added' device.

Fix this by only doing one put_device() in the error path.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices")
Reported-by: Wen Yang <wenyang@linux.alibaba.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org # v4.14+
Link: https://lore.kernel.org/r/20191120130806.44028-2-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoerofs: zero out when listxattr is called with no xattr
Gao Xiang [Sun, 1 Dec 2019 08:01:09 +0000 (16:01 +0800)]
erofs: zero out when listxattr is called with no xattr

commit 926d1650176448d7684b991fbe1a5b1a8289e97c upstream.

As David reported [1], ENODATA returns when attempting
to modify files by using EROFS as an overlayfs lower layer.

The root cause is that listxattr could return unexpected
-ENODATA by mistake for inodes without xattr. That breaks
listxattr return value convention and it can cause copy
up failure when used with overlayfs.

Resolve by zeroing out if no xattr is found for listxattr.

[1] https://lore.kernel.org/r/CAEvUa7nxnby+rxK-KRMA46=exeOMApkDMAV08AjMkkPnTPV4CQ@mail.gmail.com
Link: https://lore.kernel.org/r/20191201084040.29275-1-hsiangkao@aol.com
Fixes: cadf1ccf1b00 ("staging: erofs: add error handling for xattr submodule")
Cc: <stable@vger.kernel.org> # 4.19+
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agocpuidle: Do not unset the driver if it is there already
Zhenzhong Duan [Wed, 23 Oct 2019 01:57:14 +0000 (09:57 +0800)]
cpuidle: Do not unset the driver if it is there already

commit 918c1fe9fbbe46fcf56837ff21f0ef96424e8b29 upstream.

Fix __cpuidle_set_driver() to check if any of the CPUs in the mask has
a driver different from drv already and, if so, return -EBUSY before
updating any cpuidle_drivers per-CPU pointers.

Fixes: 82467a5a885d ("cpuidle: simplify multiple driver support")
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: cec.h: CEC_OP_REC_FLAG_ values were swapped
Hans Verkuil [Mon, 16 Sep 2019 05:47:41 +0000 (02:47 -0300)]
media: cec.h: CEC_OP_REC_FLAG_ values were swapped

commit 806e0cdfee0b99efbb450f9f6e69deb7118602fc upstream.

CEC_OP_REC_FLAG_NOT_USED is 0 and CEC_OP_REC_FLAG_USED is 1, not the
other way around.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: Jiunn Chang <c0d1n61at3@gmail.com>
Cc: <stable@vger.kernel.org> # for v4.10 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: radio: wl1273: fix interrupt masking on release
Johan Hovold [Thu, 10 Oct 2019 13:13:32 +0000 (10:13 -0300)]
media: radio: wl1273: fix interrupt masking on release

commit 1091eb830627625dcf79958d99353c2391f41708 upstream.

If a process is interrupted while accessing the radio device and the
core lock is contended, release() could return early and fail to update
the interrupt mask.

Note that the return value of the v4l2 release file operation is
ignored.

Fixes: 87d1a50ce451 ("[media] V4L2: WL1273 FM Radio: TI WL1273 FM radio driver")
Cc: stable <stable@vger.kernel.org> # 2.6.38
Cc: Matti Aaltonen <matti.j.aaltonen@nokia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: bdisp: fix memleak on release
Johan Hovold [Thu, 10 Oct 2019 13:13:31 +0000 (10:13 -0300)]
media: bdisp: fix memleak on release

commit 11609a7e21f8cea42630350aa57662928fa4dc63 upstream.

If a process is interrupted while accessing the video device and the
device lock is contended, release() could return early and fail to free
related resources.

Note that the return value of the v4l2 release file operation is
ignored.

Fixes: 28ffeebbb7bd ("[media] bdisp: 2D blitter driver using v4l2 mem2mem framework")
Cc: stable <stable@vger.kernel.org> # 4.2
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agos390/mm: properly clear _PAGE_NOEXEC bit when it is not supported
Gerald Schaefer [Wed, 11 Sep 2019 17:42:23 +0000 (19:42 +0200)]
s390/mm: properly clear _PAGE_NOEXEC bit when it is not supported

commit ab874f22d35a8058d8fdee5f13eb69d8867efeae upstream.

On older HW or under a hypervisor, w/o the instruction-execution-
protection (IEP) facility, and also w/o EDAT-1, a translation-specification
exception may be recognized when bit 55 of a pte is one (_PAGE_NOEXEC).

The current code tries to prevent setting _PAGE_NOEXEC in such cases,
by removing it within set_pte_at(). However, ptep_set_access_flags()
will modify a pte directly, w/o using set_pte_at(). There is at least
one scenario where this can result in an active pte with _PAGE_NOEXEC
set, which would then lead to a panic due to a translation-specification
exception (write to swapped out page):

do_swap_page
  pte = mk_pte (with _PAGE_NOEXEC bit)
  set_pte_at   (will remove _PAGE_NOEXEC bit in page table, but keep it
                in local variable pte)
  vmf->orig_pte = pte (pte still contains _PAGE_NOEXEC bit)
  do_wp_page
    wp_page_reuse
      entry = vmf->orig_pte (still with _PAGE_NOEXEC bit)
      ptep_set_access_flags (writes entry with _PAGE_NOEXEC bit)

Fix this by clearing _PAGE_NOEXEC already in mk_pte_phys(), where the
pgprot value is applied, so that no pte with _PAGE_NOEXEC will ever be
visible, if it is not supported. The check in set_pte_at() can then also
be removed.

Cc: <stable@vger.kernel.org> # 4.11+
Fixes: 57d7f939e7bd ("s390: add no-execute support")
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoar5523: check NULL before memcpy() in ar5523_cmd()
Denis Efremov [Mon, 30 Sep 2019 20:31:47 +0000 (23:31 +0300)]
ar5523: check NULL before memcpy() in ar5523_cmd()

commit 315cee426f87658a6799815845788fde965ddaad upstream.

memcpy() call with "idata == NULL && ilen == 0" results in undefined
behavior in ar5523_cmd(). For example, NULL is passed in callchain
"ar5523_stat_work() -> ar5523_cmd_write() -> ar5523_cmd()". This patch
adds ilen check before memcpy() call in ar5523_cmd() to prevent an
undefined behavior.

Cc: Pontus Fuchs <pontus.fuchs@gmail.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: stable@vger.kernel.org
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agocgroup: pids: use atomic64_t for pids->limit
Aleksa Sarai [Wed, 16 Oct 2019 15:50:01 +0000 (02:50 +1100)]
cgroup: pids: use atomic64_t for pids->limit

commit a713af394cf382a30dd28a1015cbe572f1b9ca75 upstream.

Because pids->limit can be changed concurrently (but we don't want to
take a lock because it would be needlessly expensive), use atomic64_ts
instead.

Fixes: commit 49b786ea146f ("cgroup: implement the PIDs subsystem")
Cc: stable@vger.kernel.org # v4.3+
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoblk-mq: avoid sysfs buffer overflow with too many CPU cores
Ming Lei [Sat, 2 Nov 2019 08:02:15 +0000 (16:02 +0800)]
blk-mq: avoid sysfs buffer overflow with too many CPU cores

commit 8962842ca5abdcf98e22ab3b2b45a103f0408b95 upstream.

It is reported that sysfs buffer overflow can be triggered if the system
has too many CPU cores(>841 on 4K PAGE_SIZE) when showing CPUs of
hctx via /sys/block/$DEV/mq/$N/cpu_list.

Use snprintf to avoid the potential buffer overflow.

This version doesn't change the attribute format, and simply stops
showing CPU numbers if the buffer is going to overflow.

Cc: stable@vger.kernel.org
Fixes: 676141e48af7("blk-mq: don't dump CPU -> hw queue map on driver load")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomd: improve handling of bio with REQ_PREFLUSH in md_flush_request()
David Jeffery [Mon, 16 Sep 2019 17:15:14 +0000 (13:15 -0400)]
md: improve handling of bio with REQ_PREFLUSH in md_flush_request()

commit 775d78319f1ceb32be8eb3b1202ccdc60e9cb7f1 upstream.

If pers->make_request fails in md_flush_request(), the bio is lost. To
fix this, pass back a bool to indicate if the original make_request call
should continue to handle the I/O and instead of assuming the flush logic
will push it to completion.

Convert md_flush_request to return a bool and no longer calls the raid
driver's make_request function.  If the return is true, then the md flush
logic has or will complete the bio and the md make_request call is done.
If false, then the md make_request function needs to keep processing like
it is a normal bio. Let the original call to md_handle_request handle any
need to retry sending the bio to the raid driver's make_request function
should it be needed.

Also mark md_flush_request and the make_request function pointer as
__must_check to issue warnings should these critical return values be
ignored.

Fixes: 2bc13b83e629 ("md: batch flush requests.")
Cc: stable@vger.kernel.org # # v4.19+
Cc: NeilBrown <neilb@suse.com>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report
Pawel Harlozinski [Tue, 12 Nov 2019 13:02:36 +0000 (14:02 +0100)]
ASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report

commit 8f157d4ff039e03e2ed4cb602eeed2fd4687a58f upstream.

Check for existance of jack before tracing.
NULL pointer dereference has been reported by KASAN while unloading
machine driver (snd_soc_cnl_rt274).

Signed-off-by: Pawel Harlozinski <pawel.harlozinski@linux.intel.com>
Link: https://lore.kernel.org/r/20191112130237.10141-1-pawel.harlozinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoASoC: rt5645: Fixed typo for buddy jack support.
Jacob Rasmussen [Thu, 14 Nov 2019 23:20:11 +0000 (16:20 -0700)]
ASoC: rt5645: Fixed typo for buddy jack support.

commit fe23be2d85b05f561431d75acddec726ea807d2a upstream.

Had a typo in e7cfd867fd98 that resulted in buddy jack support not being
fixed.

Fixes: e7cfd867fd98 ("ASoC: rt5645: Fixed buddy jack support.")
Signed-off-by: Jacob Rasmussen <jacobraz@google.com>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Cc: <jacobraz@google.com>
CC: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191114232011.165762-1-jacobraz@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoASoC: rt5645: Fixed buddy jack support.
Jacob Rasmussen [Mon, 11 Nov 2019 18:59:57 +0000 (11:59 -0700)]
ASoC: rt5645: Fixed buddy jack support.

commit e7cfd867fd9842f346688f28412eb83dec342900 upstream.

The headphone jack on buddy was broken with the following commit:
commit 6b5da66322c5 ("ASoC: rt5645: read jd1_1 status for jd
detection").
This changes the jd_mode for buddy to 4 so buddy can read from the same
register that was used in the working version of this driver without
affecting any other devices that might use this, since no other device uses
jd_mode = 4. To test this I plugged and uplugged the headphone jack, verifying
audio works.

Signed-off-by: Jacob Rasmussen <jacobraz@google.com>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Link: https://lore.kernel.org/r/20191111185957.217244-1-jacobraz@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoworkqueue: Fix pwq ref leak in rescuer_thread()
Tejun Heo [Wed, 25 Sep 2019 13:59:15 +0000 (06:59 -0700)]
workqueue: Fix pwq ref leak in rescuer_thread()

commit e66b39af00f426b3356b96433d620cb3367ba1ff upstream.

008847f66c3 ("workqueue: allow rescuer thread to do more work.") made
the rescuer worker requeue the pwq immediately if there may be more
work items which need rescuing instead of waiting for the next mayday
timer expiration.  Unfortunately, it doesn't check whether the pwq is
already on the mayday list and unconditionally gets the ref and moves
it onto the list.  This doesn't corrupt the list but creates an
additional reference to the pwq.  It got queued twice but will only be
removed once.

This leak later can trigger pwq refcnt warning on workqueue
destruction and prevent freeing of the workqueue.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "Williams, Gerald S" <gerald.s.williams@intel.com>
Cc: NeilBrown <neilb@suse.de>
Cc: stable@vger.kernel.org # v3.19+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoworkqueue: Fix spurious sanity check failures in destroy_workqueue()
Tejun Heo [Thu, 19 Sep 2019 01:43:40 +0000 (18:43 -0700)]
workqueue: Fix spurious sanity check failures in destroy_workqueue()

commit def98c84b6cdf2eeea19ec5736e90e316df5206b upstream.

Before actually destrying a workqueue, destroy_workqueue() checks
whether it's actually idle.  If it isn't, it prints out a bunch of
warning messages and leaves the workqueue dangling.  It unfortunately
has a couple issues.

* Mayday list queueing increments pwq's refcnts which gets detected as
  busy and fails the sanity checks.  However, because mayday list
  queueing is asynchronous, this condition can happen without any
  actual work items left in the workqueue.

* Sanity check failure leaves the sysfs interface behind too which can
  lead to init failure of newer instances of the workqueue.

This patch fixes the above two by

* If a workqueue has a rescuer, disable and kill the rescuer before
  sanity checks.  Disabling and killing is guaranteed to flush the
  existing mayday list.

* Remove sysfs interface before sanity checks.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Marcin Pawlowski <mpawlowski@fb.com>
Reported-by: "Williams, Gerald S" <gerald.s.williams@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agodm zoned: reduce overhead of backing device checks
Dmitry Fomichev [Wed, 6 Nov 2019 22:34:35 +0000 (14:34 -0800)]
dm zoned: reduce overhead of backing device checks

commit e7fad909b68aa37470d9f2d2731b5bec355ee5d6 upstream.

Commit 75d66ffb48efb3 added backing device health checks and as a part
of these checks, check_events() block ops template call is invoked in
dm-zoned mapping path as well as in reclaim and flush path. Calling
check_events() with ATA or SCSI backing devices introduces a blocking
scsi_test_unit_ready() call being made in sd_check_events(). Even though
the overhead of calling scsi_test_unit_ready() is small for ATA zoned
devices, it is much larger for SCSI and it affects performance in a very
negative way.

Fix this performance regression by executing check_events() only in case
of any I/O errors. The function dmz_bdev_is_dying() is modified to call
only blk_queue_dying(), while calls to check_events() are made in a new
helper function, dmz_check_bdev().

Reported-by: zhangxiaoxu <zhangxiaoxu5@huawei.com>
Fixes: 75d66ffb48efb3 ("dm zoned: properly handle backing device failure")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agodm writecache: handle REQ_FUA
Maged Mokhtar [Wed, 23 Oct 2019 20:41:17 +0000 (22:41 +0200)]
dm writecache: handle REQ_FUA

commit c1005322ff02110a4df7f0033368ea015062b583 upstream.

Call writecache_flush() on REQ_FUA in writecache_map().

Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Maged Mokhtar <mmokhtar@petasan.org>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agohwrng: omap - Fix RNG wait loop timeout
Sumit Garg [Mon, 14 Oct 2019 12:02:45 +0000 (17:32 +0530)]
hwrng: omap - Fix RNG wait loop timeout

commit be867f987a4e1222114dd07a01838a17c26f3fff upstream.

Existing RNG data read timeout is 200us but it doesn't cover EIP76 RNG
data rate which takes approx. 700us to produce 16 bytes of output data
as per testing results. So configure the timeout as 1000us to also take
account of lack of udelay()'s reliability.

Fixes: 383212425c92 ("hwrng: omap - Add device variant for SafeXcel IP-76 found in Armada 8K")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoovl: relax WARN_ON() on rename to self
Amir Goldstein [Fri, 6 Dec 2019 06:33:36 +0000 (08:33 +0200)]
ovl: relax WARN_ON() on rename to self

commit 6889ee5a53b8d969aa542047f5ac8acdc0e79a91 upstream.

In ovl_rename(), if new upper is hardlinked to old upper underneath
overlayfs before upper dirs are locked, user will get an ESTALE error
and a WARN_ON will be printed.

Changes to underlying layers while overlayfs is mounted may result in
unexpected behavior, but it shouldn't crash the kernel and it shouldn't
trigger WARN_ON() either, so relax this WARN_ON().

Reported-by: syzbot+bb1836a212e69f8e201a@syzkaller.appspotmail.com
Fixes: 804032fabb3b ("ovl: don't check rename to self")
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoovl: fix corner case of non-unique st_dev;st_ino
Amir Goldstein [Sun, 17 Nov 2019 15:43:44 +0000 (17:43 +0200)]
ovl: fix corner case of non-unique st_dev;st_ino

commit 9c6d8f13e9da10a26ad7f0a020ef86e8ef142835 upstream.

On non-samefs overlay without xino, non pure upper inodes should use a
pseudo_dev assigned to each unique lower fs and pure upper inodes use the
real upper st_dev.

It is fine for an overlay pure upper inode to use the same st_dev;st_ino
values as the real upper inode, because the content of those two different
filesystem objects is always the same.

In this case, however:
 - two filesystems, A and B
 - upper layer is on A
 - lower layer 1 is also on A
 - lower layer 2 is on B

Non pure upper overlay inode, whose origin is in layer 1 will have the same
st_dev;st_ino values as the real lower inode. This may result with a false
positive results of 'diff' between the real lower and copied up overlay
inode.

Fix this by using the upper st_dev;st_ino values in this case.  This breaks
the property of constant st_dev;st_ino across copy up of this case. This
breakage will be fixed by a later patch.

Fixes: 5148626b806a ("ovl: allocate anon bdev per unique lower fs")
Cc: stable@vger.kernel.org # v4.17+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agolib: raid6: fix awk build warnings
Greg Kroah-Hartman [Fri, 6 Dec 2019 15:26:00 +0000 (16:26 +0100)]
lib: raid6: fix awk build warnings

commit 702600eef73033ddd4eafcefcbb6560f3e3a90f7 upstream.

Newer versions of awk spit out these fun warnings:
awk: ../lib/raid6/unroll.awk:16: warning: regexp escape sequence `\#' is not a known regexp operator

As commit 700c1018b86d ("x86/insn: Fix awk regexp warnings") showed, it
turns out that there are a number of awk strings that do not need to be
escaped and newer versions of awk now warn about this.

Fix the string up so that no warning is produced.  The exact same kernel
module gets created before and after this patch, showing that it wasn't
needed.

Link: https://lore.kernel.org/r/20191206152600.GA75093@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agortlwifi: rtl8192de: Fix missing enable interrupt flag
Larry Finger [Mon, 11 Nov 2019 19:40:46 +0000 (13:40 -0600)]
rtlwifi: rtl8192de: Fix missing enable interrupt flag

commit 330bb7117101099c687e9c7f13d48068670b9c62 upstream.

In commit 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for
new drivers"), the flag that indicates that interrupts are enabled was
never set.

In addition, there are several places when enable/disable interrupts
were commented out are restored. A sychronize_interrupts() call is
removed.

Fixes: 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for new drivers")
Cc: Stable <stable@vger.kernel.org> # v3.18+
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agortlwifi: rtl8192de: Fix missing callback that tests for hw release of buffer
Larry Finger [Mon, 11 Nov 2019 19:40:45 +0000 (13:40 -0600)]
rtlwifi: rtl8192de: Fix missing callback that tests for hw release of buffer

commit 3155db7613edea8fb943624062baf1e4f9cfbfd6 upstream.

In commit 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for
new drivers"), a callback needed to check if the hardware has released
a buffer indicating that a DMA operation is completed was not added.

Fixes: 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for new drivers")
Cc: Stable <stable@vger.kernel.org> # v3.18+
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agortlwifi: rtl8192de: Fix missing code to retrieve RX buffer address
Larry Finger [Mon, 11 Nov 2019 19:40:44 +0000 (13:40 -0600)]
rtlwifi: rtl8192de: Fix missing code to retrieve RX buffer address

commit 0e531cc575c4e9e3dd52ad287b49d3c2dc74c810 upstream.

In commit 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for
new drivers"), a callback to get the RX buffer address was added to
the PCI driver. Unfortunately, driver rtl8192de was not modified
appropriately and the code runs into a WARN_ONCE() call. The use
of an incorrect array is also fixed.

Fixes: 38506ecefab9 ("rtlwifi: rtl_pci: Start modification for new drivers")
Cc: Stable <stable@vger.kernel.org> # 3.18+
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agobtrfs: record all roots for rename exchange on a subvol
Josef Bacik [Fri, 15 Nov 2019 20:43:06 +0000 (15:43 -0500)]
btrfs: record all roots for rename exchange on a subvol

commit 3e1740993e43116b3bc71b0aad1e6872f6ccf341 upstream.

Testing with the new fsstress support for subvolumes uncovered a pretty
bad problem with rename exchange on subvolumes.  We're modifying two
different subvolumes, but we only start the transaction on one of them,
so the other one is not added to the dirty root list.  This is caught by
btrfs_cow_block() with a warning because the root has not been updated,
however if we do not modify this root again we'll end up pointing at an
invalid root because the root item is never updated.

Fix this by making sure we add the destination root to the trans list,
the same as we do with normal renames.  This fixes the corruption.

Fixes: cdd1fedf8261 ("btrfs: add support for RENAME_EXCHANGE and RENAME_WHITEOUT")
CC: stable@vger.kernel.org # 4.9+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoBtrfs: send, skip backreference walking for extents with many references
Filipe Manana [Wed, 30 Oct 2019 12:23:01 +0000 (12:23 +0000)]
Btrfs: send, skip backreference walking for extents with many references

commit fd0ddbe2509568b00df364156f47561e9f469f15 upstream.

Backreference walking, which is used by send to figure if it can issue
clone operations instead of write operations, can be very slow and use
too much memory when extents have many references. This change simply
skips backreference walking when an extent has more than 64 references,
in which case we fallback to a write operation instead of a clone
operation. This limit is conservative and in practice I observed no
signicant slowdown with up to 100 references and still low memory usage
up to that limit.

This is a temporary workaround until there are speedups in the backref
walking code, and as such it does not attempt to add extra interfaces or
knobs to tweak the threshold.

Reported-by: Atemu <atemu.main@gmail.com>
Link: https://lore.kernel.org/linux-btrfs/CAE4GHgkvqVADtS4AzcQJxo0Q1jKQgKaW3JGp3SGdoinVo=C9eQ@mail.gmail.com/T/#me55dc0987f9cc2acaa54372ce0492c65782be3fa
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agobtrfs: Remove btrfs_bio::flags member
Qu Wenruo [Thu, 24 Oct 2019 01:38:29 +0000 (09:38 +0800)]
btrfs: Remove btrfs_bio::flags member

commit 34b127aecd4fe8e6a3903e10f204a7b7ffddca22 upstream.

The last user of btrfs_bio::flags was removed in commit 326e1dbb5736
("block: remove management of bi_remaining when restoring original
bi_end_io"), remove it.

(Tagged for stable as the structure is heavily used and space savings
are desirable.)

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agobtrfs: Avoid getting stuck during cyclic writebacks
Tejun Heo [Thu, 3 Oct 2019 14:27:13 +0000 (07:27 -0700)]
btrfs: Avoid getting stuck during cyclic writebacks

commit f7bddf1e27d18fbc7d3e3056ba449cfbe4e20b0a upstream.

During a cyclic writeback, extent_write_cache_pages() uses done_index
to update the writeback_index after the current run is over.  However,
instead of current index + 1, it gets to to the current index itself.

Unfortunately, this, combined with returning on EOF instead of looping
back, can lead to the following pathlogical behavior.

1. There is a single file which has accumulated enough dirty pages to
   trigger balance_dirty_pages() and the writer appending to the file
   with a series of short writes.

2. balance_dirty_pages kicks in, wakes up background writeback and sleeps.

3. Writeback kicks in and the cursor is on the last page of the dirty
   file.  Writeback is started or skipped if already in progress.  As
   it's EOF, extent_write_cache_pages() returns and the cursor is set
   to done_index which is pointing to the last page.

4. Writeback is done.  Nothing happens till balance_dirty_pages
   finishes, at which point we go back to #1.

This can almost completely stall out writing back of the file and keep
the system over dirty threshold for a long time which can mess up the
whole system.  We encountered this issue in production with a package
handling application which can reliably reproduce the issue when
running under tight memory limits.

Reading the comment in the error handling section, this seems to be to
avoid accidentally skipping a page in case the write attempt on the
page doesn't succeed.  However, this concern seems bogus.

On each page, the code either:

* Skips and moves onto the next page.

* Fails issue and sets done_index to index + 1.

* Successfully issues and continue to the next page if budget allows
  and not EOF.

IOW, as long as it's not EOF and there's budget, the code never
retries writing back the same page.  Only when a page happens to be
the last page of a particular run, we end up retrying the page, which
can't possibly guarantee anything data integrity related.  Besides,
cyclic writes are only used for non-syncing writebacks meaning that
there's no data integrity implication to begin with.

Fix it by always setting done_index past the current page being
processed.

Note that this problem exists in other writepages too.

CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoBtrfs: fix negative subv_writers counter and data space leak after buffered write
Filipe Manana [Fri, 11 Oct 2019 15:41:20 +0000 (16:41 +0100)]
Btrfs: fix negative subv_writers counter and data space leak after buffered write

commit a0e248bb502d5165b3314ac3819e888fdcdf7d9f upstream.

When doing a buffered write it's possible to leave the subv_writers
counter of the root, used for synchronization between buffered nocow
writers and snapshotting. This happens in an exceptional case like the
following:

1) We fail to allocate data space for the write, since there's not
   enough available data space nor enough unallocated space for allocating
   a new data block group;

2) Because of that failure, we try to go to NOCOW mode, which succeeds
   and therefore we set the local variable 'only_release_metadata' to true
   and set the root's sub_writers counter to 1 through the call to
   btrfs_start_write_no_snapshotting() made by check_can_nocow();

3) The call to btrfs_copy_from_user() returns zero, which is very unlikely
   to happen but not impossible;

4) No pages are copied because btrfs_copy_from_user() returned zero;

5) We call btrfs_end_write_no_snapshotting() which decrements the root's
   subv_writers counter to 0;

6) We don't set 'only_release_metadata' back to 'false' because we do
   it only if 'copied', the value returned by btrfs_copy_from_user(), is
   greater than zero;

7) On the next iteration of the while loop, which processes the same
   page range, we are now able to allocate data space for the write (we
   got enough data space released in the meanwhile);

8) After this if we fail at btrfs_delalloc_reserve_metadata(), because
   now there isn't enough free metadata space, or in some other place
   further below (prepare_pages(), lock_and_cleanup_extent_if_need(),
   btrfs_dirty_pages()), we break out of the while loop with
   'only_release_metadata' having a value of 'true';

9) Because 'only_release_metadata' is 'true' we end up decrementing the
   root's subv_writers counter to -1 (through a call to
   btrfs_end_write_no_snapshotting()), and we also end up not releasing the
   data space previously reserved through btrfs_check_data_free_space().
   As a consequence the mechanism for synchronizing NOCOW buffered writes
   with snapshotting gets broken.

Fix this by always setting 'only_release_metadata' to false at the start
of each iteration.

Fixes: 8257b2dc3c1a ("Btrfs: introduce btrfs_{start, end}_nocow_write() for each subvolume")
Fixes: 7ee9e4405f26 ("Btrfs: check if we can nocow if we don't have data space")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoBtrfs: fix metadata space leak on fixup worker failure to set range as delalloc
Filipe Manana [Wed, 9 Oct 2019 16:43:59 +0000 (17:43 +0100)]
Btrfs: fix metadata space leak on fixup worker failure to set range as delalloc

commit 536870071dbc4278264f59c9a2f5f447e584d139 upstream.

In the fixup worker, if we fail to mark the range as delalloc in the io
tree, we must release the previously reserved metadata, as well as update
the outstanding extents counter for the inode, otherwise we leak metadata
space.

In pratice we can't return an error from btrfs_set_extent_delalloc(),
which is just a wrapper around __set_extent_bit(), as for most errors
__set_extent_bit() does a BUG_ON() (or panics which hits a BUG_ON() as
well) and returning an -EEXIST error doesn't happen in this case since
the exclusive bits parameter always has a value of 0 through this code
path. Nevertheless, just fix the error handling in the fixup worker,
in case one day __set_extent_bit() can return an error to this code
path.

Fixes: f3038ee3a3f101 ("btrfs: Handle btrfs_set_extent_delalloc failure in fixup worker")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agobtrfs: use refcount_inc_not_zero in kill_all_nodes
Josef Bacik [Thu, 26 Sep 2019 12:29:32 +0000 (08:29 -0400)]
btrfs: use refcount_inc_not_zero in kill_all_nodes

commit baf320b9d531f1cfbf64c60dd155ff80a58b3796 upstream.

We hit the following warning while running down a different problem

[ 6197.175850] ------------[ cut here ]------------
[ 6197.185082] refcount_t: underflow; use-after-free.
[ 6197.194704] WARNING: CPU: 47 PID: 966 at lib/refcount.c:190 refcount_sub_and_test_checked+0x53/0x60
[ 6197.521792] Call Trace:
[ 6197.526687]  __btrfs_release_delayed_node+0x76/0x1c0
[ 6197.536615]  btrfs_kill_all_delayed_nodes+0xec/0x130
[ 6197.546532]  ? __btrfs_btree_balance_dirty+0x60/0x60
[ 6197.556482]  btrfs_clean_one_deleted_snapshot+0x71/0xd0
[ 6197.566910]  cleaner_kthread+0xfa/0x120
[ 6197.574573]  kthread+0x111/0x130
[ 6197.581022]  ? kthread_create_on_node+0x60/0x60
[ 6197.590086]  ret_from_fork+0x1f/0x30
[ 6197.597228] ---[ end trace 424bb7ae00509f56 ]---

This is because the free side drops the ref without the lock, and then
takes the lock if our refcount is 0.  So you can have nodes on the tree
that have a refcount of 0.  Fix this by zero'ing out that element in our
temporary array so we don't try to kill it again.

CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add comment ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agobtrfs: check page->mapping when loading free space cache
Josef Bacik [Tue, 24 Sep 2019 20:50:43 +0000 (16:50 -0400)]
btrfs: check page->mapping when loading free space cache

commit 3797136b626ad4b6582223660c041efdea8f26b2 upstream.

While testing 5.2 we ran into the following panic

[52238.017028] BUG: kernel NULL pointer dereference, address: 0000000000000001
[52238.105608] RIP: 0010:drop_buffers+0x3d/0x150
[52238.304051] Call Trace:
[52238.308958]  try_to_free_buffers+0x15b/0x1b0
[52238.317503]  shrink_page_list+0x1164/0x1780
[52238.325877]  shrink_inactive_list+0x18f/0x3b0
[52238.334596]  shrink_node_memcg+0x23e/0x7d0
[52238.342790]  ? do_shrink_slab+0x4f/0x290
[52238.350648]  shrink_node+0xce/0x4a0
[52238.357628]  balance_pgdat+0x2c7/0x510
[52238.365135]  kswapd+0x216/0x3e0
[52238.371425]  ? wait_woken+0x80/0x80
[52238.378412]  ? balance_pgdat+0x510/0x510
[52238.386265]  kthread+0x111/0x130
[52238.392727]  ? kthread_create_on_node+0x60/0x60
[52238.401782]  ret_from_fork+0x1f/0x30

The page we were trying to drop had a page->private, but had no
page->mapping and so called drop_buffers, assuming that we had a
buffer_head on the page, and then panic'ed trying to deref 1, which is
our page->private for data pages.

This is happening because we're truncating the free space cache while
we're trying to load the free space cache.  This isn't supposed to
happen, and I'll fix that in a followup patch.  However we still
shouldn't allow those sort of mistakes to result in messing with pages
that do not belong to us.  So add the page->mapping check to verify that
we still own this page after dropping and re-acquiring the page lock.

This page being unlocked as:
btrfs_readpage
  extent_read_full_page
    __extent_read_full_page
      __do_readpage
        if (!nr)
   unlock_page  <-- nr can be 0 only if submit_extent_page
    returns an error

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ add callchain ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agophy: renesas: rcar-gen3-usb2: Fix sysfs interface of "role"
Yoshihiro Shimoda [Mon, 7 Oct 2019 07:55:10 +0000 (16:55 +0900)]
phy: renesas: rcar-gen3-usb2: Fix sysfs interface of "role"

commit 4bd5ead82d4b877ebe41daf95f28cda53205b039 upstream.

Since the role_store() uses strncmp(), it's possible to refer
out-of-memory if the sysfs data size is smaller than strlen("host").
This patch fixes it by using sysfs_streq() instead of strncmp().

Reported-by: Pavel Machek <pavel@denx.de>
Fixes: 9bb86777fb71 ("phy: rcar-gen3-usb2: add sysfs for usb role swap")
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: dwc3: ep0: Clear started flag on completion
Thinh Nguyen [Wed, 27 Nov 2019 21:10:54 +0000 (13:10 -0800)]
usb: dwc3: ep0: Clear started flag on completion

commit 2d7b78f59e020b07fc6338eefe286f54ee2d6773 upstream.

Clear ep0's DWC3_EP_TRANSFER_STARTED flag if the END_TRANSFER command is
completed. Otherwise, we can't start control transfer again after
END_TRANSFER.

Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: dwc3: gadget: Fix logical condition
Tejas Joglekar [Wed, 13 Nov 2019 06:15:16 +0000 (11:45 +0530)]
usb: dwc3: gadget: Fix logical condition

commit 8c7d4b7b3d43c54c0b8c1e4adb917a151c754196 upstream.

This patch corrects the condition to kick the transfer without
giving back the requests when either request has remaining data
or when there are pending SGs. The && check was introduced during
spliting up the dwc3_gadget_ep_cleanup_completed_requests() function.

Fixes: f38e35dd84e2 ("usb: dwc3: gadget: split dwc3_gadget_ep_cleanup_completed_requests()")

Cc: stable@vger.kernel.org
Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: dwc3: pci: add ID for the Intel Comet Lake -H variant
Heikki Krogerus [Thu, 12 Dec 2019 09:37:13 +0000 (12:37 +0300)]
usb: dwc3: pci: add ID for the Intel Comet Lake -H variant

commit 3c3caae4cd6e122472efcf64759ff6392fb6bce2 upstream.

The original ID that was added for Comet Lake PCH was
actually for the -LP (low power) variant even though the
constant for it said CMLH. Changing that while at it.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191212093713.60614-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agovirtio-balloon: fix managed page counts when migrating pages between zones
David Hildenbrand [Wed, 11 Dec 2019 11:11:52 +0000 (12:11 +0100)]
virtio-balloon: fix managed page counts when migrating pages between zones

commit 63341ab03706e11a31e3dd8ccc0fbc9beaf723f0 upstream.

In case we have to migrate a ballon page to a newpage of another zone, the
managed page count of both zones is wrong. Paired with memory offlining
(which will adjust the managed page count), we can trigger kernel crashes
and all kinds of different symptoms.

One way to reproduce:
1. Start a QEMU guest with 4GB, no NUMA
2. Hotplug a 1GB DIMM and online the memory to ZONE_NORMAL
3. Inflate the balloon to 1GB
4. Unplug the DIMM (be quick, otherwise unmovable data ends up on it)
5. Observe /proc/zoneinfo
  Node 0, zone   Normal
    pages free     16810
          min      24848885473806
          low      18471592959183339
          high     36918337032892872
          spanned  262144
          present  262144
          managed  18446744073709533486
6. Do anything that requires some memory (e.g., inflate the balloon some
more). The OOM goes crazy and the system crashes
  [  238.324946] Out of memory: Killed process 537 (login) total-vm:27584kB, anon-rss:860kB, file-rss:0kB, shmem-rss:00
  [  238.338585] systemd invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
  [  238.339420] CPU: 0 PID: 1 Comm: systemd Tainted: G      D W         5.4.0-next-20191204+ #75
  [  238.340139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu4
  [  238.341121] Call Trace:
  [  238.341337]  dump_stack+0x8f/0xd0
  [  238.341630]  dump_header+0x61/0x5ea
  [  238.341942]  oom_kill_process.cold+0xb/0x10
  [  238.342299]  out_of_memory+0x24d/0x5a0
  [  238.342625]  __alloc_pages_slowpath+0xd12/0x1020
  [  238.343024]  __alloc_pages_nodemask+0x391/0x410
  [  238.343407]  pagecache_get_page+0xc3/0x3a0
  [  238.343757]  filemap_fault+0x804/0xc30
  [  238.344083]  ? ext4_filemap_fault+0x28/0x42
  [  238.344444]  ext4_filemap_fault+0x30/0x42
  [  238.344789]  __do_fault+0x37/0x1a0
  [  238.345087]  __handle_mm_fault+0x104d/0x1ab0
  [  238.345450]  handle_mm_fault+0x169/0x360
  [  238.345790]  do_user_addr_fault+0x20d/0x490
  [  238.346154]  do_page_fault+0x31/0x210
  [  238.346468]  async_page_fault+0x43/0x50
  [  238.346797] RIP: 0033:0x7f47eba4197e
  [  238.347110] Code: Bad RIP value.
  [  238.347387] RSP: 002b:00007ffd7c0c1890 EFLAGS: 00010293
  [  238.347834] RAX: 0000000000000002 RBX: 000055d196a20a20 RCX: 00007f47eba4197e
  [  238.348437] RDX: 0000000000000033 RSI: 00007ffd7c0c18c0 RDI: 0000000000000004
  [  238.349047] RBP: 00007ffd7c0c1c20 R08: 0000000000000000 R09: 0000000000000033
  [  238.349660] R10: 00000000ffffffff R11: 0000000000000293 R12: 0000000000000001
  [  238.350261] R13: ffffffffffffffff R14: 0000000000000000 R15: 00007ffd7c0c18c0
  [  238.350878] Mem-Info:
  [  238.351085] active_anon:3121 inactive_anon:51 isolated_anon:0
  [  238.351085]  active_file:12 inactive_file:7 isolated_file:0
  [  238.351085]  unevictable:0 dirty:0 writeback:0 unstable:0
  [  238.351085]  slab_reclaimable:5565 slab_unreclaimable:10170
  [  238.351085]  mapped:3 shmem:111 pagetables:155 bounce:0
  [  238.351085]  free:720717 free_pcp:2 free_cma:0
  [  238.353757] Node 0 active_anon:12484kB inactive_anon:204kB active_file:48kB inactive_file:28kB unevictable:0kB iss
  [  238.355979] Node 0 DMA free:11556kB min:36kB low:48kB high:60kB reserved_highatomic:0KB active_anon:152kB inactivB
  [  238.358345] lowmem_reserve[]: 0 2955 2884 2884 2884
  [  238.358761] Node 0 DMA32 free:2677864kB min:7004kB low:10028kB high:13052kB reserved_highatomic:0KB active_anon:0B
  [  238.361202] lowmem_reserve[]: 0 0 72057594037927865 72057594037927865 72057594037927865
  [  238.361888] Node 0 Normal free:193448kB min:99395541895224kB low:73886371836733356kB high:147673348131571488kB reB
  [  238.364765] lowmem_reserve[]: 0 0 0 0 0
  [  238.365101] Node 0 DMA: 7*4kB (U) 5*8kB (UE) 6*16kB (UME) 2*32kB (UM) 1*64kB (U) 2*128kB (UE) 3*256kB (UME) 2*512B
  [  238.366379] Node 0 DMA32: 0*4kB 1*8kB (U) 2*16kB (UM) 2*32kB (UM) 2*64kB (UM) 1*128kB (U) 1*256kB (U) 1*512kB (U)B
  [  238.367654] Node 0 Normal: 1985*4kB (UME) 1321*8kB (UME) 844*16kB (UME) 524*32kB (UME) 300*64kB (UME) 138*128kB (B
  [  238.369184] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
  [  238.369915] 130 total pagecache pages
  [  238.370241] 0 pages in swap cache
  [  238.370533] Swap cache stats: add 0, delete 0, find 0/0
  [  238.370981] Free swap  = 0kB
  [  238.371239] Total swap = 0kB
  [  238.371488] 1048445 pages RAM
  [  238.371756] 0 pages HighMem/MovableOnly
  [  238.372090] 306992 pages reserved
  [  238.372376] 0 pages cma reserved
  [  238.372661] 0 pages hwpoisoned

In another instance (older kernel), I was able to observe this
(negative page count :/):
  [  180.896971] Offlined Pages 32768
  [  182.667462] Offlined Pages 32768
  [  184.408117] Offlined Pages 32768
  [  186.026321] Offlined Pages 32768
  [  187.684861] Offlined Pages 32768
  [  189.227013] Offlined Pages 32768
  [  190.830303] Offlined Pages 32768
  [  190.833071] Built 1 zonelists, mobility grouping on.  Total pages: -36920272750453009

In another instance (older kernel), I was no longer able to start any
process:
  [root@vm ~]# [  214.348068] Offlined Pages 32768
  [  215.973009] Offlined Pages 32768
  cat /proc/meminfo
  -bash: fork: Cannot allocate memory
  [root@vm ~]# cat /proc/meminfo
  -bash: fork: Cannot allocate memory

Fix it by properly adjusting the managed page count when migrating if
the zone changed. The managed page count of the zones now looks after
unplug of the DIMM (and after deflating the balloon) just like before
inflating the balloon (and plugging+onlining the DIMM).

We'll temporarily modify the totalram page count. If this ever becomes a
problem, we can fine tune by providing helpers that don't touch
the totalram pages (e.g., adjust_zone_managed_page_count()).

Please note that fixing up the managed page count is only necessary when
we adjusted the managed page count when inflating - only if we
don't have VIRTIO_BALLOON_F_DEFLATE_ON_OOM. With that feature, the
managed page count is not touched when inflating/deflating.

Reported-by: Yumei Huang <yuhuang@redhat.com>
Fixes: 3dcc0571cd64 ("mm: correctly update zone->managed_pages")
Cc: <stable@vger.kernel.org> # v3.11+
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomtd: spear_smi: Fix Write Burst mode
Miquel Raynal [Tue, 22 Oct 2019 14:58:59 +0000 (16:58 +0200)]
mtd: spear_smi: Fix Write Burst mode

commit 69c7f4618c16b4678f8a4949b6bb5ace259c0033 upstream.

Any write with either dd or flashcp to a device driven by the
spear_smi.c driver will pass through the spear_smi_cpy_toio()
function. This function will get called for chunks of up to 256 bytes.
If the amount of data is smaller, we may have a problem if the data
length is not 4-byte aligned. In this situation, the kernel panics
during the memcpy:

    # dd if=/dev/urandom bs=1001 count=1 of=/dev/mtd6
    spear_smi_cpy_toio [620] dest c9070000, src c7be8800, len 256
    spear_smi_cpy_toio [620] dest c9070100, src c7be8900, len 256
    spear_smi_cpy_toio [620] dest c9070200, src c7be8a00, len 256
    spear_smi_cpy_toio [620] dest c9070300, src c7be8b00, len 233
    Unhandled fault: external abort on non-linefetch (0x808) at 0xc90703e8
    [...]
    PC is at memcpy+0xcc/0x330

The above error occurs because the implementation of memcpy_toio()
tries to optimize the number of I/O by writing 4 bytes at a time as
much as possible, until there are less than 4 bytes left and then
switches to word or byte writes.

Unfortunately, the specification states about the Write Burst mode:

        "the next AHB Write request should point to the next
incremented address and should have the same size (byte,
half-word or word)"

This means ARM architecture implementation of memcpy_toio() cannot
reliably be used blindly here. Workaround this situation by update the
write path to stick to byte access when the burst length is not
multiple of 4.

Fixes: f18dbbb1bfe0 ("mtd: ST SPEAr: Add SMI driver for serial NOR flash")
Cc: Russell King <linux@armlinux.org.uk>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agotpm: add check after commands attribs tab allocation
Tadeusz Struk [Mon, 7 Oct 2019 21:46:37 +0000 (14:46 -0700)]
tpm: add check after commands attribs tab allocation

commit f1689114acc5e89a196fec6d732dae3e48edb6ad upstream.

devm_kcalloc() can fail and return NULL so we need to check for that.

Cc: stable@vger.kernel.org
Fixes: 58472f5cd4f6f ("tpm: validate TPM 2.0 commands")
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: mon: Fix a deadlock in usbmon between mmap and read
Pete Zaitcev [Thu, 5 Dec 2019 02:39:41 +0000 (20:39 -0600)]
usb: mon: Fix a deadlock in usbmon between mmap and read

commit 19e6317d24c25ee737c65d1ffb7483bdda4bb54a upstream.

The problem arises because our read() function grabs a lock of the
circular buffer, finds something of interest, then invokes copy_to_user()
straight from the buffer, which in turn takes mm->mmap_sem. In the same
time, the callback mon_bin_vma_fault() is invoked under mm->mmap_sem.
It attempts to take the fetch lock and deadlocks.

This patch does away with protecting of our page list with any
semaphores, and instead relies on the kernel not close the device
while mmap is active in a process.

In addition, we prohibit re-sizing of a buffer while mmap is active.
This way, when (now unlocked) fault is processed, it works with the
page that is intended to be mapped-in, and not some other random page.
Note that this may have an ABI impact, but hopefully no legitimate
program is this wrong.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Reported-by: syzbot+56f9673bb4cdcbeb0e92@syzkaller.appspotmail.com
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Fixes: 46eb14a6e158 ("USB: fix usbmon BUG trigger")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191204203941.3503452b@suzdal.zaitcev.lan
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: core: urb: fix URB structure initialization function
Emiliano Ingrassia [Wed, 27 Nov 2019 16:03:55 +0000 (17:03 +0100)]
usb: core: urb: fix URB structure initialization function

commit 1cd17f7f0def31e3695501c4f86cd3faf8489840 upstream.

Explicitly initialize URB structure urb_list field in usb_init_urb().
This field can be potentially accessed uninitialized and its
initialization is coherent with the usage of list_del_init() in
usb_hcd_unlink_urb_from_ep() and usb_giveback_urb_bh() and its
explicit initialization in usb_hcd_submit_urb() error path.

Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191127160355.GA27196@ingrassia.epigenesys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: adutux: fix interface sanity check
Johan Hovold [Tue, 10 Dec 2019 11:25:59 +0000 (12:25 +0100)]
USB: adutux: fix interface sanity check

commit 3c11c4bed02b202e278c0f5c319ae435d7fb9815 upstream.

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 03270634e242 ("USB: Add ADU support for Ontrak ADU devices")
Cc: stable <stable@vger.kernel.org> # 2.6.19
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: roles: fix a potential use after free
Wen Yang [Sun, 24 Nov 2019 14:22:36 +0000 (22:22 +0800)]
usb: roles: fix a potential use after free

commit 1848a543191ae32e558bb0a5974ae7c38ebd86fc upstream.

Free the sw structure only after we are done using it.
This patch just moves the put_device() down a bit to avoid the
use after free.

Fixes: 5c54fcac9a9d ("usb: roles: Take care of driver module reference counting")
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Cc: stable <stable@vger.kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/20191124142236.25671-1-wenyang@linux.alibaba.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: serial: io_edgeport: fix epic endpoint lookup
Johan Hovold [Tue, 10 Dec 2019 11:26:01 +0000 (12:26 +0100)]
USB: serial: io_edgeport: fix epic endpoint lookup

commit 7c5a2df3367a2c4984f1300261345817d95b71f8 upstream.

Make sure to use the current alternate setting when looking up the
endpoints on epic devices to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 6e8cf7751f9f ("USB: add EPIC support to the io_edgeport driver")
Cc: stable <stable@vger.kernel.org> # 2.6.21
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-5-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: idmouse: fix interface sanity checks
Johan Hovold [Tue, 10 Dec 2019 11:26:00 +0000 (12:26 +0100)]
USB: idmouse: fix interface sanity checks

commit 59920635b89d74b9207ea803d5e91498d39e8b69 upstream.

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: atm: ueagle-atm: add missing endpoint check
Johan Hovold [Tue, 10 Dec 2019 11:25:58 +0000 (12:25 +0100)]
USB: atm: ueagle-atm: add missing endpoint check

commit 09068c1ad53fb077bdac288869dec2435420bdc4 upstream.

Make sure that the interrupt interface has an endpoint before trying to
access its endpoint descriptors to avoid dereferencing a NULL pointer.

The driver binds to the interrupt interface with interface number 0, but
must not assume that this interface or its current alternate setting are
the first entries in the corresponding configuration arrays.

Fixes: b72458a80c75 ("[PATCH] USB: Eagle and ADI 930 usb adsl modem driver")
Cc: stable <stable@vger.kernel.org> # 2.6.16
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoiio: imu: inv_mpu6050: fix temperature reporting using bad unit
Jean-Baptiste Maneyrol [Tue, 26 Nov 2019 16:19:12 +0000 (17:19 +0100)]
iio: imu: inv_mpu6050: fix temperature reporting using bad unit

commit 53eaa9c27fdc01b4f4d885223e29f97393409e7e upstream.

Temperature should be reported in milli-degrees, not degrees. Fix
scale and offset values to use the correct unit.

This is a fix for an issue that has been present for a long time.
The fixes tag reflects the point at which the code last changed in a
fashion that would make this fix patch no longer apply.  Backports
will be necessary to fix those elements that predate that patch.

Fixes: 1615fe41a195 ("iio: imu: mpu6050: Fix FIFO layout for ICM20602")
Cc: stable@vger.kernel.org
Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoiio: humidity: hdc100x: fix IIO_HUMIDITYRELATIVE channel reporting
Chris Lesiak [Thu, 21 Nov 2019 20:39:42 +0000 (20:39 +0000)]
iio: humidity: hdc100x: fix IIO_HUMIDITYRELATIVE channel reporting

commit 342a6928bd5017edbdae376042d8ad6af3d3b943 upstream.

The IIO_HUMIDITYRELATIVE channel was being incorrectly reported back
as percent when it should have been milli percent. This is via an
incorrect scale value being returned to userspace.

Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoiio: adis16480: Add debugfs_reg_access entry
Nuno Sá [Mon, 28 Oct 2019 16:33:49 +0000 (17:33 +0100)]
iio: adis16480: Add debugfs_reg_access entry

commit 4c35b7a51e2f291471f7221d112c6a45c63e83bc upstream.

The driver is defining debugfs entries by calling
`adis16480_debugfs_init()`. However, those entries are attached to the
iio_dev debugfs entry which won't exist if no debugfs_reg_access
callback is provided.

Fixes: 2f3abe6cbb6c ("iio:imu: Add support for the ADIS16480 and similar IMUs")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoARM: dts: pandora-common: define wl1251 as child node of mmc3
H. Nikolaus Schaller [Thu, 7 Nov 2019 10:30:36 +0000 (11:30 +0100)]
ARM: dts: pandora-common: define wl1251 as child node of mmc3

commit 4f9007d692017cef38baf2a9b82b7879d5b2407b upstream.

Since v4.7 the dma initialization requires that there is a
device tree property for "rx" and "tx" channels which is
not provided by the pdata-quirks initialization.

By conversion of the mmc3 setup to device tree this will
finally allows to remove the OpenPandora wlan specific omap3
data-quirks.

Fixes: 81eef6ca9201 ("mmc: omap_hsmmc: Use dma_request_chan() for requesting DMA channel")
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Cc: <stable@vger.kernel.org> # v4.7+
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoxhci: handle some XHCI_TRUST_TX_LENGTH quirks cases as default behaviour.
Mathias Nyman [Wed, 11 Dec 2019 14:20:06 +0000 (16:20 +0200)]
xhci: handle some XHCI_TRUST_TX_LENGTH quirks cases as default behaviour.

commit 7ff11162808cc2ec66353fc012c58bb449c892c3 upstream.

xhci driver claims it needs XHCI_TRUST_TX_LENGTH quirk for both
Broadcom/Cavium and a Renesas xHC controllers.

The quirk was inteded for handling false "success" complete event for
transfers that had data left untransferred.
These transfers should complete with "short packet" events instead.

In these two new cases the false "success" completion is reported
after a "short packet" if the TD consists of several TRBs.
xHCI specs 4.10.1.1.2 say remaining TRBs should report "short packet"
as well after the first short packet in a TD, but this issue seems so
common it doesn't make sense to add the quirk for all vendors.

Turn these events into short packets automatically instead.

This gets rid of the  "The WARN Successful completion on short TX for
slot 1 ep 1: needs XHCI_TRUST_TX_LENGTH quirk" warning in many cases.

Cc: <stable@vger.kernel.org>
Reported-by: Eli Billauer <eli.billauer@gmail.com>
Reported-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Eli Billauer <eli.billauer@gmail.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20191211142007.8847-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoxhci: Increase STS_HALT timeout in xhci_suspend()
Kai-Heng Feng [Wed, 11 Dec 2019 14:20:05 +0000 (16:20 +0200)]
xhci: Increase STS_HALT timeout in xhci_suspend()

commit 7c67cf6658cec70d8a43229f2ce74ca1443dc95e upstream.

I've recently observed failed xHCI suspend attempt on AMD Raven Ridge
system:
kernel: xhci_hcd 0000:04:00.4: WARN: xHC CMD_RUN timeout
kernel: PM: suspend_common(): xhci_pci_suspend+0x0/0xd0 returns -110
kernel: PM: pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 returns -110
kernel: PM: dpm_run_callback(): pci_pm_suspend+0x0/0x150 returns -110
kernel: PM: Device 0000:04:00.4 failed to suspend async: error -110

Similar to commit ac343366846a ("xhci: Increase STS_SAVE timeout in
xhci_suspend()") we also need to increase the HALT timeout to make it be
able to suspend again.

Cc: <stable@vger.kernel.org> # 5.2+
Fixes: f7fac17ca925 ("xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic()")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20191211142007.8847-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoxhci: Fix memory leak in xhci_add_in_port()
Mika Westerberg [Wed, 11 Dec 2019 14:20:02 +0000 (16:20 +0200)]
xhci: Fix memory leak in xhci_add_in_port()

commit ce91f1a43b37463f517155bdfbd525eb43adbd1a upstream.

When xHCI is part of Alpine or Titan Ridge Thunderbolt controller and
the xHCI device is hot-removed as a result of unplugging a dock for
example, the driver leaks memory it allocates for xhci->usb3_rhub.psi
and xhci->usb2_rhub.psi in xhci_add_in_port() as reported by kmemleak:

unreferenced object 0xffff922c24ef42f0 (size 16):
  comm "kworker/u16:2", pid 178, jiffies 4294711640 (age 956.620s)
  hex dump (first 16 bytes):
    21 00 0c 00 12 00 dc 05 23 00 e0 01 00 00 00 00  !.......#.......
  backtrace:
    [<000000007ac80914>] xhci_mem_init+0xcf8/0xeb7
    [<0000000001b6d775>] xhci_init+0x7c/0x160
    [<00000000db443fe3>] xhci_gen_setup+0x214/0x340
    [<00000000fdffd320>] xhci_pci_setup+0x48/0x110
    [<00000000541e1e03>] usb_add_hcd.cold+0x265/0x747
    [<00000000ca47a56b>] usb_hcd_pci_probe+0x219/0x3b4
    [<0000000021043861>] xhci_pci_probe+0x24/0x1c0
    [<00000000b9231f25>] local_pci_probe+0x3d/0x70
    [<000000006385c9d7>] pci_device_probe+0xd0/0x150
    [<0000000070241068>] really_probe+0xf5/0x3c0
    [<0000000061f35c0a>] driver_probe_device+0x58/0x100
    [<000000009da11198>] bus_for_each_drv+0x79/0xc0
    [<000000009ce45f69>] __device_attach+0xda/0x160
    [<00000000df201aaf>] pci_bus_add_device+0x46/0x70
    [<0000000088a1bc48>] pci_bus_add_devices+0x27/0x60
    [<00000000ad9ee708>] pci_bus_add_devices+0x52/0x60
unreferenced object 0xffff922c24ef3318 (size 8):
  comm "kworker/u16:2", pid 178, jiffies 4294711640 (age 956.620s)
  hex dump (first 8 bytes):
    34 01 05 00 35 41 0a 00                          4...5A..
  backtrace:
    [<000000007ac80914>] xhci_mem_init+0xcf8/0xeb7
    [<0000000001b6d775>] xhci_init+0x7c/0x160
    [<00000000db443fe3>] xhci_gen_setup+0x214/0x340
    [<00000000fdffd320>] xhci_pci_setup+0x48/0x110
    [<00000000541e1e03>] usb_add_hcd.cold+0x265/0x747
    [<00000000ca47a56b>] usb_hcd_pci_probe+0x219/0x3b4
    [<0000000021043861>] xhci_pci_probe+0x24/0x1c0
    [<00000000b9231f25>] local_pci_probe+0x3d/0x70
    [<000000006385c9d7>] pci_device_probe+0xd0/0x150
    [<0000000070241068>] really_probe+0xf5/0x3c0
    [<0000000061f35c0a>] driver_probe_device+0x58/0x100
    [<000000009da11198>] bus_for_each_drv+0x79/0xc0
    [<000000009ce45f69>] __device_attach+0xda/0x160
    [<00000000df201aaf>] pci_bus_add_device+0x46/0x70
    [<0000000088a1bc48>] pci_bus_add_devices+0x27/0x60
    [<00000000ad9ee708>] pci_bus_add_devices+0x52/0x60

Fix this by calling kfree() for the both psi objects in
xhci_mem_cleanup().

Cc: <stable@vger.kernel.org> # 4.4+
Fixes: 47189098f8be ("xhci: parse xhci protocol speed ID list for usb 3.1 usage")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20191211142007.8847-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: xhci: only set D3hot for pci device
Henry Lin [Wed, 11 Dec 2019 14:20:04 +0000 (16:20 +0200)]
usb: xhci: only set D3hot for pci device

commit f2c710f7dca8457e88b4ac9de2060f011254f9dd upstream.

Xhci driver cannot call pci_set_power_state() on non-pci xhci host
controllers. For example, NVIDIA Tegra XHCI host controller which acts
as platform device with XHCI_SPURIOUS_WAKEUP quirk set in some platform
hits this issue during shutdown.

Cc: <stable@vger.kernel.org>
Fixes: 638298dc66ea ("xhci: Fix spurious wakeups after S5 on Haswell")
Signed-off-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20191211142007.8847-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agostaging: gigaset: add endpoint-type sanity check
Johan Hovold [Mon, 2 Dec 2019 08:56:10 +0000 (09:56 +0100)]
staging: gigaset: add endpoint-type sanity check

commit ed9ed5a89acba51b82bdff61144d4e4a4245ec8a upstream.

Add missing endpoint-type sanity checks to probe.

This specifically prevents a warning in USB core on URB submission when
fuzzing USB descriptors.

Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agostaging: gigaset: fix illegal free on probe errors
Johan Hovold [Mon, 2 Dec 2019 08:56:09 +0000 (09:56 +0100)]
staging: gigaset: fix illegal free on probe errors

commit 84f60ca7b326ed8c08582417493982fe2573a9ad upstream.

The driver failed to initialise its receive-buffer pointer, something
which could lead to an illegal free on late probe errors.

Fix this by making sure to clear all driver data at allocation.

Fixes: 2032e2c2309d ("usb_gigaset: code cleanup")
Cc: stable <stable@vger.kernel.org> # 2.6.33
Cc: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agostaging: gigaset: fix general protection fault on probe
Johan Hovold [Mon, 2 Dec 2019 08:56:08 +0000 (09:56 +0100)]
staging: gigaset: fix general protection fault on probe

commit 53f35a39c3860baac1e5ca80bf052751cfb24a99 upstream.

Fix a general protection fault when accessing the endpoint descriptors
which could be triggered by a malicious device due to missing sanity
checks on the number of endpoints.

Reported-by: syzbot+35b1c403a14f5c89eba7@syzkaller.appspotmail.com
Fixes: 07dc1f9f2f80 ("[PATCH] isdn4linux: Siemens Gigaset drivers - M105 USB DECT adapter")
Cc: stable <stable@vger.kernel.org> # 2.6.17
Cc: Hansjoerg Lipp <hjlipp@web.de>
Cc: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agostaging: rtl8712: fix interface sanity check
Johan Hovold [Tue, 10 Dec 2019 11:47:51 +0000 (12:47 +0100)]
staging: rtl8712: fix interface sanity check

commit c724f776f048538ecfdf53a52b7a522309f5c504 upstream.

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel")
Cc: stable <stable@vger.kernel.org> # 2.6.37
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210114751.5119-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agostaging: rtl8188eu: fix interface sanity check
Johan Hovold [Tue, 10 Dec 2019 11:47:50 +0000 (12:47 +0100)]
staging: rtl8188eu: fix interface sanity check

commit 74ca34118a0e05793935d804ccffcedd6eb56596 upstream.

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: c2478d39076b ("staging: r8188eu: Add files for new driver - part 20")
Cc: stable <stable@vger.kernel.org> # 3.12
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210114751.5119-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: Allow USB device to be warm reset in suspended state
Kai-Heng Feng [Wed, 6 Nov 2019 06:27:10 +0000 (14:27 +0800)]
usb: Allow USB device to be warm reset in suspended state

commit e76b3bf7654c3c94554c24ba15a3d105f4006c80 upstream.

On Dell WD15 dock, sometimes USB ethernet cannot be detected after plugging
cable to the ethernet port, the hub and roothub get runtime resumed and
runtime suspended immediately:
...
[  433.315169] xhci_hcd 0000:3a:00.0: hcd_pci_runtime_resume: 0
[  433.315204] usb usb4: usb auto-resume
[  433.315226] hub 4-0:1.0: hub_resume
[  433.315239] xhci_hcd 0000:3a:00.0: Get port status 4-1 read: 0x10202e2, return 0x10343
[  433.315264] usb usb4-port1: status 0343 change 0001
[  433.315279] xhci_hcd 0000:3a:00.0: clear port1 connect change, portsc: 0x10002e2
[  433.315293] xhci_hcd 0000:3a:00.0: Get port status 4-2 read: 0x2a0, return 0x2a0
[  433.317012] xhci_hcd 0000:3a:00.0: xhci_hub_status_data: stopping port polling.
[  433.422282] xhci_hcd 0000:3a:00.0: Get port status 4-1 read: 0x10002e2, return 0x343
[  433.422307] usb usb4-port1: do warm reset
[  433.422311] usb 4-1: device reset not allowed in state 8
[  433.422339] hub 4-0:1.0: state 7 ports 2 chg 0002 evt 0000
[  433.422346] xhci_hcd 0000:3a:00.0: Get port status 4-1 read: 0x10002e2, return 0x343
[  433.422356] usb usb4-port1: do warm reset
[  433.422358] usb 4-1: device reset not allowed in state 8
[  433.422428] xhci_hcd 0000:3a:00.0: set port remote wake mask, actual port 0 status  = 0xf0002e2
[  433.422455] xhci_hcd 0000:3a:00.0: set port remote wake mask, actual port 1 status  = 0xe0002a0
[  433.422465] hub 4-0:1.0: hub_suspend
[  433.422475] usb usb4: bus auto-suspend, wakeup 1
[  433.426161] xhci_hcd 0000:3a:00.0: xhci_hub_status_data: stopping port polling.
[  433.466209] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.510204] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.554051] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.598235] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.642154] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.686204] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.730205] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.774203] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.818207] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.862040] xhci_hcd 0000:3a:00.0: port 0 polling in bus suspend, waiting
[  433.862053] xhci_hcd 0000:3a:00.0: xhci_hub_status_data: stopping port polling.
[  433.862077] xhci_hcd 0000:3a:00.0: xhci_suspend: stopping port polling.
[  433.862096] xhci_hcd 0000:3a:00.0: // Setting command ring address to 0x8578fc001
[  433.862312] xhci_hcd 0000:3a:00.0: hcd_pci_runtime_suspend: 0
[  433.862445] xhci_hcd 0000:3a:00.0: PME# enabled
[  433.902376] xhci_hcd 0000:3a:00.0: restoring config space at offset 0xc (was 0x0, writing 0x20)
[  433.902395] xhci_hcd 0000:3a:00.0: restoring config space at offset 0x4 (was 0x100000, writing 0x100403)
[  433.902490] xhci_hcd 0000:3a:00.0: PME# disabled
[  433.902504] xhci_hcd 0000:3a:00.0: enabling bus mastering
[  433.902547] xhci_hcd 0000:3a:00.0: // Setting command ring address to 0x8578fc001
[  433.902649] pcieport 0000:00:1b.0: PME: Spurious native interrupt!
[  433.902839] xhci_hcd 0000:3a:00.0: Port change event, 4-1, id 3, portsc: 0xb0202e2
[  433.902842] xhci_hcd 0000:3a:00.0: resume root hub
[  433.902845] xhci_hcd 0000:3a:00.0: handle_port_status: starting port polling.
[  433.902877] xhci_hcd 0000:3a:00.0: xhci_resume: starting port polling.
[  433.902889] xhci_hcd 0000:3a:00.0: xhci_hub_status_data: stopping port polling.
[  433.902891] xhci_hcd 0000:3a:00.0: hcd_pci_runtime_resume: 0
[  433.902919] usb usb4: usb wakeup-resume
[  433.902942] usb usb4: usb auto-resume
[  433.902966] hub 4-0:1.0: hub_resume
...

As Mathias pointed out, the hub enters Cold Attach Status state and
requires a warm reset. However usb_reset_device() bails out early when
the device is in suspended state, as its callers port_event() and
hub_event() don't always resume the device.

Since there's nothing wrong to reset a suspended device, allow
usb_reset_device() to do so to solve the issue.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191106062710.29880-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: documentation: flags on usb-storage versus UAS
Oliver Neukum [Thu, 14 Nov 2019 11:27:58 +0000 (12:27 +0100)]
USB: documentation: flags on usb-storage versus UAS

commit 65cc8bf99349f651a0a2cee69333525fe581f306 upstream.

Document which flags work storage, UAS or both

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191114112758.32747-4-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: uas: heed CAPACITY_HEURISTICS
Oliver Neukum [Thu, 14 Nov 2019 11:27:57 +0000 (12:27 +0100)]
USB: uas: heed CAPACITY_HEURISTICS

commit 335cbbd5762d5e5c67a8ddd6e6362c2aa42a328f upstream.

There is no need to ignore this flag. We should be as close
to storage in that regard as makes sense, so honor flags whose
cost is tiny.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191114112758.32747-3-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoUSB: uas: honor flag to avoid CAPACITY16
Oliver Neukum [Thu, 14 Nov 2019 11:27:56 +0000 (12:27 +0100)]
USB: uas: honor flag to avoid CAPACITY16

commit bff000cae1eec750d62e265c4ba2db9af57b17e1 upstream.

Copy the support over from usb-storage to get feature parity

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191114112758.32747-2-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: venus: remove invalid compat_ioctl32 handler
Arnd Bergmann [Wed, 6 Nov 2019 09:06:54 +0000 (10:06 +0100)]
media: venus: remove invalid compat_ioctl32 handler

commit 4adc0423de92cf850d1ef5c0e7cb28fd7a38219e upstream.

v4l2_compat_ioctl32() is the function that calls into
v4l2_file_operations->compat_ioctl32(), so setting that back to the same
function leads to a trivial endless loop, followed by a kernel
stack overrun.

Remove the incorrect assignment.

Cc: stable@vger.kernel.org
Fixes: 7472c1c69138 ("[media] media: venus: vdec: add video decoder files")
Fixes: aaaa93eda64b ("[media] media: venus: venc: add video encoder files")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoscsi: qla2xxx: Fix driver unload hang
Quinn Tran [Tue, 5 Nov 2019 15:06:53 +0000 (07:06 -0800)]
scsi: qla2xxx: Fix driver unload hang

commit dd322b7f3efc8cda085bb60eadc4aee6324eadd8 upstream.

This patch fixes driver unload hang by removing msleep()

Fixes: d74595278f4ab ("scsi: qla2xxx: Add multiple queue pair functionality.")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191105150657.8092-5-hmadhani@marvell.com
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: gadget: pch_udc: fix use after free
Gustavo A. R. Silva [Wed, 6 Nov 2019 20:28:21 +0000 (14:28 -0600)]
usb: gadget: pch_udc: fix use after free

commit 66d1b0c0580b7f1b1850ee4423f32ac42afa2e92 upstream.

Remove pointer dereference after free.

pci_pool_free doesn't care about contents of td.
It's just a void* for it

Addresses-Coverity-ID: 1091173 ("Use after free")
Cc: stable@vger.kernel.org
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20191106202821.GA20347@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agousb: gadget: configfs: Fix missing spin_lock_init()
Wei Yongjun [Wed, 30 Oct 2019 03:40:46 +0000 (03:40 +0000)]
usb: gadget: configfs: Fix missing spin_lock_init()

commit 093edc2baad2c258b1f55d1ab9c63c2b5ae67e42 upstream.

The driver allocates the spinlock but not initialize it.
Use spin_lock_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Fixes: 1a1c851bbd70 ("usb: gadget: configfs: fix concurrent issue between composite APIs")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20191030034046.188808-1-weiyongjun1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoLinux 4.19.89 v4.19.89
Greg Kroah-Hartman [Fri, 13 Dec 2019 07:52:59 +0000 (08:52 +0100)]
Linux 4.19.89

4 years agoappletalk: Set error code if register_snap_client failed
YueHaibing [Tue, 30 Apr 2019 11:34:08 +0000 (19:34 +0800)]
appletalk: Set error code if register_snap_client failed

commit c93ad1337ad06a718890a89cdd85188ff9a5a5cc upstream.

If register_snap_client fails in atalk_init,
error code should be set, otherwise it will
triggers NULL pointer dereference while unloading
module.

Fixes: 9804501fa122 ("appletalk: Fix potential NULL pointer dereference in unregister_snap_client")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoappletalk: Fix potential NULL pointer dereference in unregister_snap_client
YueHaibing [Thu, 14 Mar 2019 05:47:59 +0000 (13:47 +0800)]
appletalk: Fix potential NULL pointer dereference in unregister_snap_client

commit 9804501fa1228048857910a6bf23e085aade37cc upstream.

register_snap_client may return NULL, all the callers
check it, but only print a warning. This will result in
NULL pointer dereference in unregister_snap_client and other
places.

It has always been used like this since v2.6

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agonet: qrtr: fix memort leak in qrtr_tun_write_iter
Navid Emamdoost [Wed, 11 Sep 2019 15:09:02 +0000 (10:09 -0500)]
net: qrtr: fix memort leak in qrtr_tun_write_iter

commit a21b7f0cff1906a93a0130b74713b15a0b36481d upstream.

In qrtr_tun_write_iter the allocated kbuf should be release in case of
error or success return.

v2 Update: Thanks to David Miller for pointing out the release on success
path as well.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>