platform/kernel/linux-rpi.git
4 years agofutex: Mark the begin of futex exit explicitly
Thomas Gleixner [Wed, 6 Nov 2019 21:55:41 +0000 (22:55 +0100)]
futex: Mark the begin of futex exit explicitly

commit 18f694385c4fd77a09851fd301236746ca83f3cb upstream.

Instead of relying on PF_EXITING use an explicit state for the futex exit
and set it in the futex exit function. This moves the smp barrier and the
lock/unlock serialization into the futex code.

As with the DEAD state this is restricted to the exit path as exec
continues to use the same task struct.

This allows to simplify that logic in a next step.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.539409004@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agofutex: Set task::futex_state to DEAD right after handling futex exit
Thomas Gleixner [Wed, 6 Nov 2019 21:55:40 +0000 (22:55 +0100)]
futex: Set task::futex_state to DEAD right after handling futex exit

commit f24f22435dcc11389acc87e5586239c1819d217c upstream.

Setting task::futex_state in do_exit() is rather arbitrarily placed for no
reason. Move it into the futex code.

Note, this is only done for the exit cleanup as the exec cleanup cannot set
the state to FUTEX_STATE_DEAD because the task struct is still in active
use.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.439511191@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agofutex: Split futex_mm_release() for exit/exec
Thomas Gleixner [Wed, 6 Nov 2019 21:55:39 +0000 (22:55 +0100)]
futex: Split futex_mm_release() for exit/exec

commit 150d71584b12809144b8145b817e83b81158ae5f upstream.

To allow separate handling of the futex exit state in the futex exit code
for exit and exec, split futex_mm_release() into two functions and invoke
them from the corresponding exit/exec_mm_release() callsites.

Preparatory only, no functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.332094221@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoexit/exec: Seperate mm_release()
Thomas Gleixner [Wed, 6 Nov 2019 21:55:38 +0000 (22:55 +0100)]
exit/exec: Seperate mm_release()

commit 4610ba7ad877fafc0a25a30c6c82015304120426 upstream.

mm_release() contains the futex exit handling. mm_release() is called from
do_exit()->exit_mm() and from exec()->exec_mm().

In the exit_mm() case PF_EXITING and the futex state is updated. In the
exec_mm() case these states are not touched.

As the futex exit code needs further protections against exit races, this
needs to be split into two functions.

Preparatory only, no functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.240518241@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agofutex: Replace PF_EXITPIDONE with a state
Thomas Gleixner [Wed, 6 Nov 2019 21:55:37 +0000 (22:55 +0100)]
futex: Replace PF_EXITPIDONE with a state

commit 3d4775df0a89240f671861c6ab6e8d59af8e9e41 upstream.

The futex exit handling relies on PF_ flags. That's suboptimal as it
requires a smp_mb() and an ugly lock/unlock of the exiting tasks pi_lock in
the middle of do_exit() to enforce the observability of PF_EXITING in the
futex code.

Add a futex_state member to task_struct and convert the PF_EXITPIDONE logic
over to the new state. The PF_EXITING dependency will be cleaned up in a
later step.

This prepares for handling various futex exit issues later.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.149449274@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agofutex: Move futex exit handling into futex code
Thomas Gleixner [Wed, 6 Nov 2019 21:55:36 +0000 (22:55 +0100)]
futex: Move futex exit handling into futex code

commit ba31c1a48538992316cc71ce94fa9cd3e7b427c0 upstream.

The futex exit handling is #ifdeffed into mm_release() which is not pretty
to begin with. But upcoming changes to address futex exit races need to add
more functionality to this exit code.

Split it out into a function, move it into futex code and make the various
futex exit functions static.

Preparatory only and no functional change.

Folded build fix from Borislav.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.049705556@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agocpufreq: Add NULL checks to show() and store() methods of cpufreq
Kai Shen [Thu, 7 Nov 2019 05:08:17 +0000 (05:08 +0000)]
cpufreq: Add NULL checks to show() and store() methods of cpufreq

commit e6e8df07268c1f75dd9215536e2ce4587b70f977 upstream.

Add NULL checks to show() and store() in cpufreq.c to avoid attempts
to invoke a NULL callback.

Though some interfaces of cpufreq are set as read-only, users can
still get write permission using chmod which can lead to a kernel
crash, as follows:

chmod +w /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
echo 1 >  /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

This bug was found in linux 4.19.

Signed-off-by: Kai Shen <shenkai8@huawei.com>
Reported-by: Feilong Lin <linfeilong@huawei.com>
Reviewed-by: Feilong Lin <linfeilong@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ 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 agomedia: usbvision: Fix races among open, close, and disconnect
Alan Stern [Mon, 7 Oct 2019 15:09:53 +0000 (12:09 -0300)]
media: usbvision: Fix races among open, close, and disconnect

commit 9e08117c9d4efc1e1bc6fce83dab856d9fd284b6 upstream.

Visual inspection of the usbvision driver shows that it suffers from
three races between its open, close, and disconnect handlers.  In
particular, the driver is careful to update its usbvision->user and
usbvision->remove_pending flags while holding the private mutex, but:

usbvision_v4l2_close() and usbvision_radio_close() don't hold
the mutex while they check the value of
usbvision->remove_pending;

usbvision_disconnect() doesn't hold the mutex while checking
the value of usbvision->user; and

also, usbvision_v4l2_open() and usbvision_radio_open() don't
check whether the device has been unplugged before allowing
the user to open the device files.

Each of these can potentially lead to usbvision_release() being called
twice and use-after-free errors.

This patch fixes the races by reading the flags while the mutex is
still held and checking for pending removes before allowing an open to
succeed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: usbvision: Fix invalid accesses after device disconnect
Alan Stern [Mon, 7 Oct 2019 15:09:04 +0000 (12:09 -0300)]
media: usbvision: Fix invalid accesses after device disconnect

commit c7a191464078262bf799136317c95824e26a222b upstream.

The syzbot fuzzer found two invalid-access bugs in the usbvision
driver.  These bugs occur when userspace keeps the device file open
after the device has been disconnected and usbvision_disconnect() has
set usbvision->dev to NULL:

When the device file is closed, usbvision_radio_close() tries
to issue a usb_set_interface() call, passing the NULL pointer
as its first argument.

If userspace performs a querycap ioctl call, vidioc_querycap()
calls usb_make_path() with the same NULL pointer.

This patch fixes the problems by making the appropriate tests
beforehand.  Note that vidioc_querycap() is protected by
usbvision->v4l2_lock, acquired in a higher layer of the V4L2
subsystem.

Reported-and-tested-by: syzbot+7fa38a608b1075dfd634@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: vivid: Fix wrong locking that causes race conditions on streaming stop
Alexander Popov [Sun, 3 Nov 2019 22:17:19 +0000 (23:17 +0100)]
media: vivid: Fix wrong locking that causes race conditions on streaming stop

commit 6dcd5d7a7a29c1e4b8016a06aed78cd650cd8c27 upstream.

There is the same incorrect approach to locking implemented in
vivid_stop_generating_vid_cap(), vivid_stop_generating_vid_out() and
sdr_cap_stop_streaming().

These functions are called during streaming stopping with vivid_dev.mutex
locked. And they all do the same mistake while stopping their kthreads,
which need to lock this mutex as well. See the example from
vivid_stop_generating_vid_cap():
  /* shutdown control thread */
  vivid_grab_controls(dev, false);
  mutex_unlock(&dev->mutex);
  kthread_stop(dev->kthread_vid_cap);
  dev->kthread_vid_cap = NULL;
  mutex_lock(&dev->mutex);

But when this mutex is unlocked, another vb2_fop_read() can lock it
instead of vivid_thread_vid_cap() and manipulate the buffer queue.
That causes a use-after-free access later.

To fix those issues let's:
  1. avoid unlocking the mutex in vivid_stop_generating_vid_cap(),
vivid_stop_generating_vid_out() and sdr_cap_stop_streaming();
  2. use mutex_trylock() with schedule_timeout_uninterruptible() in
the loops of the vivid kthread handlers.

Signed-off-by: Alexander Popov <alex.popov@linux.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: <stable@vger.kernel.org> # for v3.18 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomedia: vivid: Set vid_cap_streaming and vid_out_streaming to true
Vandana BN [Mon, 9 Sep 2019 09:43:31 +0000 (06:43 -0300)]
media: vivid: Set vid_cap_streaming and vid_out_streaming to true

commit b4add02d2236fd5f568db141cfd8eb4290972eb3 upstream.

When vbi stream is started, followed by video streaming,
the vid_cap_streaming and vid_out_streaming were not being set to true,
which would cause the video stream to stop when vbi stream is stopped.
This patch allows to set vid_cap_streaming and vid_out_streaming to true.
According to Hans Verkuil it appears that these 'if (dev->kthread_vid_cap)'
checks are a left-over from the original vivid development and should never
have been there.

Signed-off-by: Vandana BN <bnvandana@gmail.com>
Cc: <stable@vger.kernel.org> # for v3.18 and up
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoALSA: usb-audio: Fix Scarlett 6i6 Gen 2 port data
Geoffrey D. Bennett [Sun, 10 Nov 2019 13:43:56 +0000 (00:13 +1030)]
ALSA: usb-audio: Fix Scarlett 6i6 Gen 2 port data

commit ce3cba788a1b7b8aed9380c3035d9e850884bd2d upstream.

The s6i6_gen2_info.ports[] array had the Mixer and PCM port type
entries in the wrong place. Use designators to explicitly specify the
array elements being set.

Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface")
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Tested-by: Alex Fellows <alex.fellows@gmail.com>
Tested-by: Markus Schroetter <project.m.schroetter@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191110134356.GA31589@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoALSA: usb-audio: Fix NULL dereference at parsing BADD
Takashi Iwai [Fri, 22 Nov 2019 11:28:40 +0000 (12:28 +0100)]
ALSA: usb-audio: Fix NULL dereference at parsing BADD

commit 9435f2bb66874a0c4dd25e7c978957a7ca2c93b1 upstream.

snd_usb_mixer_controls_badd() that parses UAC3 BADD profiles misses a
NULL check for the given interfaces.  When a malformed USB descriptor
is passed, this may lead to an Oops, as spotted by syzkaller.
Skip the iteration if the interface doesn't exist for avoiding the
crash.

Fixes: 17156f23e93c ("ALSA: usb: add UAC3 BADD profiles support")
Reported-by: syzbot+a36ab65c6653d7ccdd62@syzkaller.appspotmail.com
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191122112840.24797-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agofutex: Prevent robust futex exit race
Yang Tao [Wed, 6 Nov 2019 21:55:35 +0000 (22:55 +0100)]
futex: Prevent robust futex exit race

commit ca16d5bee59807bf04deaab0a8eccecd5061528c upstream.

Robust futexes utilize the robust_list mechanism to allow the kernel to
release futexes which are held when a task exits. The exit can be voluntary
or caused by a signal or fault. This prevents that waiters block forever.

The futex operations in user space store a pointer to the futex they are
either locking or unlocking in the op_pending member of the per task robust
list.

After a lock operation has succeeded the futex is queued in the robust list
linked list and the op_pending pointer is cleared.

After an unlock operation has succeeded the futex is removed from the
robust list linked list and the op_pending pointer is cleared.

The robust list exit code checks for the pending operation and any futex
which is queued in the linked list. It carefully checks whether the futex
value is the TID of the exiting task. If so, it sets the OWNER_DIED bit and
tries to wake up a potential waiter.

This is race free for the lock operation but unlock has two race scenarios
where waiters might not be woken up. These issues can be observed with
regular robust pthread mutexes. PI aware pthread mutexes are not affected.

(1) Unlocking task is killed after unlocking the futex value in user space
    before being able to wake a waiter.

        pthread_mutex_unlock()
                |
                V
        atomic_exchange_rel (&mutex->__data.__lock, 0)
                        <------------------------killed
            lll_futex_wake ()                   |
                                                |
                                                |(__lock = 0)
                                                |(enter kernel)
                                                |
                                                V
                                            do_exit()
                                            exit_mm()
                                          mm_release()
                                        exit_robust_list()
                                        handle_futex_death()
                                                |
                                                |(__lock = 0)
                                                |(uval = 0)
                                                |
                                                V
        if ((uval & FUTEX_TID_MASK) != task_pid_vnr(curr))
                return 0;

    The sanity check which ensures that the user space futex is owned by
    the exiting task prevents the wakeup of waiters which in consequence
    block infinitely.

(2) Waiting task is killed after a wakeup and before it can acquire the
    futex in user space.

        OWNER                         WAITER
futex_wait()
   pthread_mutex_unlock()               |
                |                       |
                |(__lock = 0)           |
                |                       |
                V                       |
         futex_wake() ------------>  wakeup()
                                        |
                                        |(return to userspace)
                                        |(__lock = 0)
                                        |
                                        V
                        oldval = mutex->__data.__lock
                                          <-----------------killed
    atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,  |
                        id | assume_other_futex_waiters, 0)      |
                                                                 |
                                                                 |
                                                   (enter kernel)|
                                                                 |
                                                                 V
                                                         do_exit()
                                                        |
                                                        |
                                                        V
                                        handle_futex_death()
                                        |
                                        |(__lock = 0)
                                        |(uval = 0)
                                        |
                                        V
        if ((uval & FUTEX_TID_MASK) != task_pid_vnr(curr))
                return 0;

    The sanity check which ensures that the user space futex is owned
    by the exiting task prevents the wakeup of waiters, which seems to
    be correct as the exiting task does not own the futex value, but
    the consequence is that other waiters wont be woken up and block
    infinitely.

In both scenarios the following conditions are true:

   - task->robust_list->list_op_pending != NULL
   - user space futex value == 0
   - Regular futex (not PI)

If these conditions are met then it is reasonably safe to wake up a
potential waiter in order to prevent the above problems.

As this might be a false positive it can cause spurious wakeups, but the
waiter side has to handle other types of unrelated wakeups, e.g. signals
gracefully anyway. So such a spurious wakeup will not affect the
correctness of these operations.

This workaround must not touch the user space futex value and cannot set
the OWNER_DIED bit because the lock value is 0, i.e. uncontended. Setting
OWNER_DIED in this case would result in inconsistent state and subsequently
in malfunction of the owner died handling in user space.

The rest of the user space state is still consistent as no other task can
observe the list_op_pending entry in the exiting tasks robust list.

The eventually woken up waiter will observe the uncontended lock value and
take it over.

[ tglx: Massaged changelog and comment. Made the return explicit and not
   depend on the subsequent check and added constants to hand into
   handle_futex_death() instead of plain numbers. Fixed a few coding
style issues. ]

Fixes: 0771dfefc9e5 ("[PATCH] lightweight robust futexes: core")
Signed-off-by: Yang Tao <yang.tao172@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1573010582-35297-1-git-send-email-wang.yi59@zte.com.cn
Link: https://lkml.kernel.org/r/20191106224555.943191378@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Fix FIXUP_ESPFIX_STACK with user CR3
Andy Lutomirski [Sun, 24 Nov 2019 16:50:03 +0000 (08:50 -0800)]
x86/entry/32: Fix FIXUP_ESPFIX_STACK with user CR3

commit 4a13b0e3e10996b9aa0b45a764ecfe49f6fcd360 upstream.

UNWIND_ESPFIX_STACK needs to read the GDT, and the GDT mapping that
can be accessed via %fs is not mapped in the user pagetables.  Use
SGDT to find the cpu_entry_area mapping and read the espfix offset
from that instead.

Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_EN...
Ingo Molnar [Sun, 24 Nov 2019 10:21:44 +0000 (11:21 +0100)]
x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise

commit 05b042a1944322844eaae7ea596d5f154166d68a upstream.

When two recent commits that increased the size of the 'struct cpu_entry_area'
were merged in -tip, the 32-bit defconfig build started failing on the following
build time assert:

  ./include/linux/compiler.h:391:38: error: call to ‘__compiletime_assert_189’ declared with attribute error: BUILD_BUG_ON failed: CPU_ENTRY_AREA_PAGES * PAGE_SIZE < CPU_ENTRY_AREA_MAP_SIZE
  arch/x86/mm/cpu_entry_area.c:189:2: note: in expansion of macro ‘BUILD_BUG_ON’
  In function ‘setup_cpu_entry_area_ptes’,

Which corresponds to the following build time assert:

BUILD_BUG_ON(CPU_ENTRY_AREA_PAGES * PAGE_SIZE < CPU_ENTRY_AREA_MAP_SIZE);

The purpose of this assert is to sanity check the fixed-value definition of
CPU_ENTRY_AREA_PAGES arch/x86/include/asm/pgtable_32_types.h:

#define CPU_ENTRY_AREA_PAGES    (NR_CPUS * 41)

The '41' is supposed to match sizeof(struct cpu_entry_area)/PAGE_SIZE, which value
we didn't want to define in such a low level header, because it would cause
dependency hell.

Every time the size of cpu_entry_area is changed, we have to adjust CPU_ENTRY_AREA_PAGES
accordingly - and this assert is checking that constraint.

But the assert is both imprecise and buggy, primarily because it doesn't
include the single readonly IDT page that is mapped at CPU_ENTRY_AREA_BASE
(which begins at a PMD boundary).

This bug was hidden by the fact that by accident CPU_ENTRY_AREA_PAGES is defined
too large upstream (v5.4-rc8):

#define CPU_ENTRY_AREA_PAGES    (NR_CPUS * 40)

While 'struct cpu_entry_area' is 155648 bytes, or 38 pages. So we had two extra
pages, which hid the bug.

The following commit (not yet upstream) increased the size to 40 pages:

  x86/iopl: ("Restrict iopl() permission scope")

... but increased CPU_ENTRY_AREA_PAGES only 41 - i.e. shortening the gap
to just 1 extra page.

Then another not-yet-upstream commit changed the size again:

  880a98c33996: ("x86/cpu_entry_area: Add guard page for entry stack on 32bit")

Which increased the cpu_entry_area size from 38 to 39 pages, but
didn't change CPU_ENTRY_AREA_PAGES (kept it at 40). This worked
fine, because we still had a page left from the accidental 'reserve'.

But when these two commits were merged into the same tree, the
combined size of cpu_entry_area grew from 38 to 40 pages, while
CPU_ENTRY_AREA_PAGES finally caught up to 40 as well.

Which is fine in terms of functionality, but the assert broke:

BUILD_BUG_ON(CPU_ENTRY_AREA_PAGES * PAGE_SIZE < CPU_ENTRY_AREA_MAP_SIZE);

because CPU_ENTRY_AREA_MAP_SIZE is the total size of the area,
which is 1 page larger due to the IDT page.

To fix all this, change the assert to two precise asserts:

BUILD_BUG_ON((CPU_ENTRY_AREA_PAGES+1)*PAGE_SIZE != CPU_ENTRY_AREA_MAP_SIZE);
BUILD_BUG_ON(CPU_ENTRY_AREA_TOTAL_SIZE != CPU_ENTRY_AREA_MAP_SIZE);

This takes the IDT page into account, and also connects the size-based
define of CPU_ENTRY_AREA_TOTAL_SIZE with the address-subtraction based
define of CPU_ENTRY_AREA_MAP_SIZE.

Also clean up some of the names which made it rather confusing:

 - 'CPU_ENTRY_AREA_TOT_SIZE' wasn't actually the 'total' size of
   the cpu-entry-area, but the per-cpu array size, so rename this
   to CPU_ENTRY_AREA_ARRAY_SIZE.

 - Introduce CPU_ENTRY_AREA_TOTAL_SIZE that _is_ the total mapping
   size, with the IDT included.

 - Add comments where '+1' denotes the IDT mapping - it wasn't
   obvious and took me about 3 hours to decode...

Finally, because this particular commit is actually applied after
this patch:

  880a98c33996: ("x86/cpu_entry_area: Add guard page for entry stack on 32bit")

Fix the CPU_ENTRY_AREA_PAGES value from 40 pages to the correct 39 pages.

All future commits that change cpu_entry_area will have to adjust
this value precisely.

As a side note, we should probably attempt to remove CPU_ENTRY_AREA_PAGES
and derive its value directly from the structure, without causing
header hell - but that is an adventure for another day! :-)

Fixes: 880a98c33996: ("x86/cpu_entry_area: Add guard page for entry stack on 32bit")
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoselftests/x86/sigreturn/32: Invalidate DS and ES when abusing the kernel
Andy Lutomirski [Wed, 20 Nov 2019 19:58:32 +0000 (11:58 -0800)]
selftests/x86/sigreturn/32: Invalidate DS and ES when abusing the kernel

commit 4d2fa82d98d2d296043a04eb517d7dbade5b13b8 upstream.

If the kernel accidentally uses DS or ES while the user values are
loaded, it will work fine for sane userspace.  In the interest of
simulating maximally insane userspace, make sigreturn_32 zero out DS
and ES for the nasty parts so that inadvertent use of these segments
will crash.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoselftests/x86/mov_ss_trap: Fix the SYSENTER test
Andy Lutomirski [Wed, 20 Nov 2019 20:59:13 +0000 (12:59 -0800)]
selftests/x86/mov_ss_trap: Fix the SYSENTER test

commit 8caa016bfc129f2c925d52da43022171d1d1de91 upstream.

For reasons that I haven't quite fully diagnosed, running
mov_ss_trap_32 on a 32-bit kernel results in an infinite loop in
userspace.  This appears to be because the hacky SYSENTER test
doesn't segfault as desired; instead it corrupts the program state
such that it infinite loops.

Fix it by explicitly clearing EBP before doing SYSENTER.  This will
give a more reliable segfault.

Fixes: 59c2a7226fc5 ("x86/selftests: Add mov_to_ss test")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Fix NMI vs ESPFIX
Peter Zijlstra [Wed, 20 Nov 2019 14:02:26 +0000 (15:02 +0100)]
x86/entry/32: Fix NMI vs ESPFIX

commit 895429076512e9d1cf5428181076299c90713159 upstream.

When the NMI lands on an ESPFIX_SS, we are on the entry stack and must
swizzle, otherwise we'll run do_nmi() on the entry stack, which is
BAD.

Also, similar to the normal exception path, we need to correct the
ESPFIX magic before leaving the entry stack, otherwise pt_regs will
present a non-flat stack pointer.

Tested by running sigreturn_32 concurrent with perf-record.

Fixes: e5862d0515ad ("x86/entry/32: Leave the kernel via trampoline stack")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Unwind the ESPFIX stack earlier on exception entry
Andy Lutomirski [Wed, 20 Nov 2019 09:10:49 +0000 (10:10 +0100)]
x86/entry/32: Unwind the ESPFIX stack earlier on exception entry

commit a1a338e5b6fe9e0a39c57c232dc96c198bb53e47 upstream.

Right now, we do some fancy parts of the exception entry path while SS
might have a nonzero base: we fill in regs->ss and regs->sp, and we
consider switching to the kernel stack. This results in regs->ss and
regs->sp referring to a non-flat stack and it may result in
overflowing the entry stack. The former issue means that we can try to
call iret_exc on a non-flat stack, which doesn't work.

Tested with selftests/x86/sigreturn_32.

Fixes: 45d7b255747c ("x86/entry/32: Enter the kernel via trampoline stack")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Move FIXUP_FRAME after pushing %fs in SAVE_ALL
Andy Lutomirski [Wed, 20 Nov 2019 08:56:36 +0000 (09:56 +0100)]
x86/entry/32: Move FIXUP_FRAME after pushing %fs in SAVE_ALL

commit 82cb8a0b1d8d07817b5d59f7fa1438e1fceafab2 upstream.

This will allow us to get percpu access working before FIXUP_FRAME,
which will allow us to unwind ESPFIX earlier.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Use %ss segment where required
Andy Lutomirski [Wed, 20 Nov 2019 08:49:33 +0000 (09:49 +0100)]
x86/entry/32: Use %ss segment where required

commit 4c4fd55d3d59a41ddfa6ecba7e76928921759f43 upstream.

When re-building the IRET frame we use %eax as an destination %esp,
make sure to then also match the segment for when there is a nonzero
SS base (ESPFIX).

[peterz: Changelog and minor edits]
Fixes: 3c88c692c287 ("x86/stackframe/32: Provide consistent pt_regs")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/entry/32: Fix IRET exception
Peter Zijlstra [Wed, 20 Nov 2019 12:05:06 +0000 (13:05 +0100)]
x86/entry/32: Fix IRET exception

commit 40ad2199580e248dce2a2ebb722854180c334b9e upstream.

As reported by Lai, the commit 3c88c692c287 ("x86/stackframe/32:
Provide consistent pt_regs") wrecked the IRET EXTABLE entry by making
.Lirq_return not point at IRET.

Fix this by placing IRET_FRAME in RESTORE_REGS, to mirror how
FIXUP_FRAME is part of SAVE_ALL.

Fixes: 3c88c692c287 ("x86/stackframe/32: Provide consistent pt_regs")
Reported-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/cpu_entry_area: Add guard page for entry stack on 32bit
Thomas Gleixner [Wed, 20 Nov 2019 23:40:24 +0000 (00:40 +0100)]
x86/cpu_entry_area: Add guard page for entry stack on 32bit

commit 880a98c339961eaa074393e3a2117cbe9125b8bb upstream.

The entry stack in the cpu entry area is protected against overflow by the
readonly GDT on 64-bit, but on 32-bit the GDT needs to be writeable and
therefore does not trigger a fault on stack overflow.

Add a guard page.

Fixes: c482feefe1ae ("x86/entry/64: Make cpu_entry_area.tss read-only")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/pti/32: Size initial_page_table correctly
Thomas Gleixner [Wed, 20 Nov 2019 23:40:23 +0000 (00:40 +0100)]
x86/pti/32: Size initial_page_table correctly

commit f490e07c53d66045d9d739e134145ec9b38653d3 upstream.

Commit 945fd17ab6ba ("x86/cpu_entry_area: Sync cpu_entry_area to
initial_page_table") introduced the sync for the initial page table for
32bit.

sync_initial_page_table() uses clone_pgd_range() which does the update for
the kernel page table. If PTI is enabled it also updates the user space
page table counterpart, which is assumed to be in the next page after the
target PGD.

At this point in time 32-bit did not have PTI support, so the user space
page table update was not taking place.

The support for PTI on 32-bit which was introduced later on, did not take
that into account and missed to add the user space counter part for the
initial page table.

As a consequence sync_initial_page_table() overwrites any data which is
located in the page behing initial_page_table causing random failures,
e.g. by corrupting doublefault_tss and wreckaging the doublefault handler
on 32bit.

Fix it by adding a "user" page table right after initial_page_table.

Fixes: 7757d607c6b3 ("x86/pti: Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/doublefault/32: Fix stack canaries in the double fault handler
Andy Lutomirski [Thu, 21 Nov 2019 10:50:12 +0000 (11:50 +0100)]
x86/doublefault/32: Fix stack canaries in the double fault handler

commit 3580d0b29cab08483f84a16ce6a1151a1013695f upstream.

The double fault TSS was missing GS setup, which is needed for stack
canaries to work.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/xen/32: Simplify ring check in xen_iret_crit_fixup()
Jan Beulich [Mon, 11 Nov 2019 14:32:59 +0000 (15:32 +0100)]
x86/xen/32: Simplify ring check in xen_iret_crit_fixup()

commit 922eea2ce5c799228d9ff1be9890e6873ce8fff6 upstream.

This can be had with two instead of six insns, by just checking the high
CS.RPL bit.

Also adjust the comment - there would be no #GP in the mentioned cases, as
there's no segment limit violation or alike. Instead there'd be #PF, but
that one reports the target EIP of said branch, not the address of the
branch insn itself.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lkml.kernel.org/r/a5986837-01eb-7bf8-bf42-4d3084d6a1f5@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/xen/32: Make xen_iret_crit_fixup() independent of frame layout
Jan Beulich [Mon, 11 Nov 2019 14:32:12 +0000 (15:32 +0100)]
x86/xen/32: Make xen_iret_crit_fixup() independent of frame layout

commit 29b810f5a5ec127d3143770098e05981baa3eb77 upstream.

Now that SS:ESP always get saved by SAVE_ALL, this also needs to be
accounted for in xen_iret_crit_fixup(). Otherwise the old_ax value gets
interpreted as EFLAGS, and hence VM86 mode appears to be active all the
time, leading to random "vm86_32: no user_vm86: BAD" log messages alongside
processes randomly crashing.

Since following the previous model (sitting after SAVE_ALL) would further
complicate the code _and_ retain the dependency of xen_iret_crit_fixup() on
frame manipulations done by entry_32.S, switch things around and do the
adjustment ahead of SAVE_ALL.

Fixes: 3c88c692c287 ("x86/stackframe/32: Provide consistent pt_regs")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Stable Team <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/32d8713d-25a7-84ab-b74b-aa3e88abce6b@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/stackframe/32: Repair 32-bit Xen PV
Jan Beulich [Mon, 18 Nov 2019 15:21:12 +0000 (16:21 +0100)]
x86/stackframe/32: Repair 32-bit Xen PV

commit 81ff2c37f9e5d77593928df0536d86443195fd64 upstream.

Once again RPL checks have been introduced which don't account for a 32-bit
kernel living in ring 1 when running in a PV Xen domain. The case in
FIXUP_FRAME has been preventing boot.

Adjust BUG_IF_WRONG_CR3 as well to guard against future uses of the macro
on a code path reachable when running in PV mode under Xen; I have to admit
that I stopped at a certain point trying to figure out whether there are
present ones.

Fixes: 3c88c692c287 ("x86/stackframe/32: Provide consistent pt_regs")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Stable Team <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/0fad341f-b7f5-f859-d55d-f0084ee7087e@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agonbd: prevent memory leak
Navid Emamdoost [Mon, 23 Sep 2019 20:09:58 +0000 (15:09 -0500)]
nbd: prevent memory leak

commit 03bf73c315edca28f47451913177e14cd040a216 upstream.

In nbd_add_socket when krealloc succeeds, if nsock's allocation fail the
reallocted memory is leak. The correct behaviour should be assigning the
reallocted memory to config->socks right after success.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/speculation: Fix redundant MDS mitigation message
Waiman Long [Fri, 15 Nov 2019 16:14:45 +0000 (11:14 -0500)]
x86/speculation: Fix redundant MDS mitigation message

commit cd5a2aa89e847bdda7b62029d94e95488d73f6b2 upstream.

Since MDS and TAA mitigations are inter-related for processors that are
affected by both vulnerabilities, the followiing confusing messages can
be printed in the kernel log:

  MDS: Vulnerable
  MDS: Mitigation: Clear CPU buffers

To avoid the first incorrect message, defer the printing of MDS
mitigation after the TAA mitigation selection has been done. However,
that has the side effect of printing TAA mitigation first before MDS
mitigation.

 [ bp: Check box is affected/mitigations are disabled first before
   printing and massage. ]

Suggested-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Mark Gross <mgross@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191115161445.30809-3-longman@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/speculation: Fix incorrect MDS/TAA mitigation status
Waiman Long [Fri, 15 Nov 2019 16:14:44 +0000 (11:14 -0500)]
x86/speculation: Fix incorrect MDS/TAA mitigation status

commit 64870ed1b12e235cfca3f6c6da75b542c973ff78 upstream.

For MDS vulnerable processors with TSX support, enabling either MDS or
TAA mitigations will enable the use of VERW to flush internal processor
buffers at the right code path. IOW, they are either both mitigated
or both not. However, if the command line options are inconsistent,
the vulnerabilites sysfs files may not report the mitigation status
correctly.

For example, with only the "mds=off" option:

  vulnerabilities/mds:Vulnerable; SMT vulnerable
  vulnerabilities/tsx_async_abort:Mitigation: Clear CPU buffers; SMT vulnerable

The mds vulnerabilities file has wrong status in this case. Similarly,
the taa vulnerability file will be wrong with mds mitigation on, but
taa off.

Change taa_select_mitigation() to sync up the two mitigation status
and have them turned off if both "mds=off" and "tsx_async_abort=off"
are present.

Update documentation to emphasize the fact that both "mds=off" and
"tsx_async_abort=off" have to be specified together for processors that
are affected by both TAA and MDS to be effective.

 [ bp: Massage and add kernel-parameters.txt change too. ]

Fixes: 1b42f017415b ("x86/speculation/taa: Add mitigation for TSX Async Abort")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: linux-doc@vger.kernel.org
Cc: Mark Gross <mgross@linux.intel.com>
Cc: <stable@vger.kernel.org>
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191115161445.30809-2-longman@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agox86/insn: Fix awk regexp warnings
Alexander Kapshuk [Tue, 24 Sep 2019 04:46:59 +0000 (07:46 +0300)]
x86/insn: Fix awk regexp warnings

commit 700c1018b86d0d4b3f1f2d459708c0cdf42b521d upstream.

gawk 5.0.1 generates the following regexp warnings:

  GEN      /home/sasha/torvalds/tools/objtool/arch/x86/lib/inat-tables.c
  awk: ../arch/x86/tools/gen-insn-attr-x86.awk:260: warning: regexp escape sequence `\:' is not a known regexp operator
  awk: ../arch/x86/tools/gen-insn-attr-x86.awk:350: (FILENAME=../arch/x86/lib/x86-opcode-map.txt FNR=41) warning: regexp escape sequence `\&' is  not a known regexp operator

Ealier versions of gawk are not known to generate these warnings. The
gawk manual referenced below does not list characters ':' and '&' as
needing escaping, so 'unescape' them. See

  https://www.gnu.org/software/gawk/manual/html_node/Escape-Sequences.html

for more info.

Running diff on the output generated by the script before and after
applying the patch reported no differences.

 [ bp: Massage commit message. ]

[ Caught the respective tools header discrepancy. ]
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190924044659.3785-1-alexander.kapshuk@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agomd/raid10: prevent access of uninitialized resync_pages offset
John Pittman [Tue, 12 Nov 2019 00:43:20 +0000 (16:43 -0800)]
md/raid10: prevent access of uninitialized resync_pages offset

commit 45422b704db392a6d79d07ee3e3670b11048bd53 upstream.

Due to unneeded multiplication in the out_free_pages portion of
r10buf_pool_alloc(), when using a 3-copy raid10 layout, it is
possible to access a resync_pages offset that has not been
initialized.  This access translates into a crash of the system
within resync_free_pages() while passing a bad pointer to
put_page().  Remove the multiplication, preventing access to the
uninitialized area.

Fixes: f0250618361db ("md: raid10: don't use bio's vec table to manage resync pages")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: John Pittman <jpittman@redhat.com>
Suggested-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoRevert "dm crypt: use WQ_HIGHPRI for the IO and crypt workqueues"
Mike Snitzer [Wed, 20 Nov 2019 22:27:39 +0000 (17:27 -0500)]
Revert "dm crypt: use WQ_HIGHPRI for the IO and crypt workqueues"

commit f612b2132db529feac4f965f28a1b9258ea7c22b upstream.

This reverts commit a1b89132dc4f61071bdeaab92ea958e0953380a1.

Revert required hand-patching due to subsequent changes that were
applied since commit a1b89132dc4f61071bdeaab92ea958e0953380a1.

Requires: ed0302e83098d ("dm crypt: make workqueue names device-specific")
Cc: stable@vger.kernel.org
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=199857
Reported-by: Vito Caputo <vcaputo@pengaru.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoRevert "Bluetooth: hci_ll: set operational frequency earlier"
Adam Ford [Wed, 2 Oct 2019 11:46:26 +0000 (06:46 -0500)]
Revert "Bluetooth: hci_ll: set operational frequency earlier"

commit cef456cd354ef485f12d57000c455e83e416a2b6 upstream.

As nice as it would be to update firmware faster, that patch broke
at least two different boards, an OMAP4+WL1285 based Motorola Droid
4, as reported by Sebasian Reichel and the Logic PD i.MX6Q +
WL1837MOD.

This reverts commit a2e02f38eff84f199c8e32359eb213f81f270047.

Signed-off-by: Adam Ford <aford173@gmail.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Cc: stable@vger.kernel.org
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoath10k: restore QCA9880-AR1A (v1) detection
Christian Lamparter [Fri, 6 Sep 2019 21:54:23 +0000 (23:54 +0200)]
ath10k: restore QCA9880-AR1A (v1) detection

commit f8914a14623a79b73f72b2b1ee4cd9b2cb91b735 upstream.

This patch restores the old behavior that read
the chip_id on the QCA988x before resetting the
chip. This needs to be done in this order since
the unsupported QCA988x AR1A chips fall off the
bus when resetted. Otherwise the next MMIO Op
after the reset causes a BUS ERROR and panic.

Cc: stable@vger.kernel.org
Fixes: 1a7fecb766c8 ("ath10k: reset chip before reading chip_id in probe")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoath10k: Fix HOST capability QMI incompatibility
Bjorn Andersson [Thu, 25 Jul 2019 06:31:08 +0000 (23:31 -0700)]
ath10k: Fix HOST capability QMI incompatibility

commit 7165ef890a4c44cf16db66b82fd78448f4bde6ba upstream.

The introduction of 768ec4c012ac ("ath10k: update HOST capability QMI
message") served the purpose of supporting the new and extended HOST
capability QMI message.

But while the new message adds a slew of optional members it changes the
data type of the "daemon_support" member, which means that older
versions of the firmware will fail to decode the incoming request
message.

There is no way to detect this breakage from Linux and there's no way to
recover from sending the wrong message (i.e. we can't just try one
format and then fallback to the other), so a quirk is introduced in
DeviceTree to indicate to the driver that the firmware requires the 8bit
version of this message.

Cc: stable@vger.kernel.org
Fixes: 768ec4c012ac ("ath10k: update HOST capability qmi message")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoath10k: Fix a NULL-ptr-deref bug in ath10k_usb_alloc_urb_from_pipe
Hui Peng [Sat, 19 Oct 2019 11:42:23 +0000 (14:42 +0300)]
ath10k: Fix a NULL-ptr-deref bug in ath10k_usb_alloc_urb_from_pipe

commit bfd6e6e6c5d2ee43a3d9902b36e01fc7527ebb27 upstream.

The `ar_usb` field of `ath10k_usb_pipe_usb_pipe` objects
are initialized to point to the containing `ath10k_usb` object
according to endpoint descriptors read from the device side, as shown
below in `ath10k_usb_setup_pipe_resources`:

for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
        endpoint = &iface_desc->endpoint[i].desc;

        // get the address from endpoint descriptor
        pipe_num = ath10k_usb_get_logical_pipe_num(ar_usb,
                                                endpoint->bEndpointAddress,
                                                &urbcount);
        ......
        // select the pipe object
        pipe = &ar_usb->pipes[pipe_num];

        // initialize the ar_usb field
        pipe->ar_usb = ar_usb;
}

The driver assumes that the addresses reported in endpoint
descriptors from device side  to be complete. If a device is
malicious and does not report complete addresses, it may trigger
NULL-ptr-deref `ath10k_usb_alloc_urb_from_pipe` and
`ath10k_usb_free_urb_to_pipe`.

This patch fixes the bug by preventing potential NULL-ptr-deref.

Signed-off-by: Hui Peng <benquike@gmail.com>
Reported-by: Hui Peng <benquike@gmail.com>
Reported-by: Mathias Payer <mathias.payer@nebelwelt.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[groeck: Add driver tag to subject, fix build warning]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoath9k_hw: fix uninitialized variable data
Denis Efremov [Thu, 26 Sep 2019 22:56:04 +0000 (01:56 +0300)]
ath9k_hw: fix uninitialized variable data

commit 80e84f36412e0c5172447b6947068dca0d04ee82 upstream.

Currently, data variable in ar9003_hw_thermo_cal_apply() could be
uninitialized if ar9300_otp_read_word() will fail to read the value.
Initialize data variable with 0 to prevent an undefined behavior. This
will be enough to handle error case when ar9300_otp_read_word() fails.

Fixes: 80fe43f2bbd5 ("ath9k_hw: Read and configure thermocal for AR9462")
Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
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 agoBluetooth: Fix invalid-free in bcsp_close()
Tomas Bortoli [Fri, 1 Nov 2019 20:42:44 +0000 (21:42 +0100)]
Bluetooth: Fix invalid-free in bcsp_close()

commit cf94da6f502d8caecabd56b194541c873c8a7a3c upstream.

Syzbot reported an invalid-free that I introduced fixing a memleak.

bcsp_recv() also frees bcsp->rx_skb but never nullifies its value.
Nullify bcsp->rx_skb every time it is freed.

Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Reported-by: syzbot+a0d209a4676664613e76@syzkaller.appspotmail.com
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 years agoLinux 5.4 v5.4
Linus Torvalds [Mon, 25 Nov 2019 00:32:01 +0000 (16:32 -0800)]
Linux 5.4

4 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sun, 24 Nov 2019 20:36:39 +0000 (12:36 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/viro/vfs

Pull cramfs fix from Al Viro:
 "Regression fix, fallen through the cracks"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  cramfs: fix usage on non-MTD device

4 years agocramfs: fix usage on non-MTD device
Maxime Bizon [Sat, 19 Oct 2019 19:24:11 +0000 (15:24 -0400)]
cramfs: fix usage on non-MTD device

When both CONFIG_CRAMFS_MTD and CONFIG_CRAMFS_BLOCKDEV are enabled, if
we fail to mount on MTD, we don't try on block device.

Note: this relies upon cramfs_mtd_fill_super() leaving no side
effects on fc state in case of failure; in general, failing
get_tree_...() does *not* mean "fine to try again"; e.g. parsed
options might've been consumed by fill_super callback and freed
on failure.

Fixes: 74f78fc5ef43 ("vfs: Convert cramfs to use the new mount API")

Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
4 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Linus Torvalds [Sat, 23 Nov 2019 21:02:18 +0000 (13:02 -0800)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull last minute virtio bugfixes from Michael Tsirkin:
 "Minor bugfixes all over the place"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_balloon: fix shrinker count
  virtio_balloon: fix shrinker scan number of pages
  virtio_console: allocate inbufs in add_port() only if it is needed
  virtio_ring: fix return code on DMA mapping fails

4 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 23 Nov 2019 00:57:26 +0000 (16:57 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fix from Dmitry Torokhov:
 "Just a single revert as RMI mode should not have been enabled for this
  model [yet?]"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Revert "Input: synaptics - enable RMI mode for X1 Extreme 2nd Generation"

4 years agoRevert "Input: synaptics - enable RMI mode for X1 Extreme 2nd Generation"
Lyude Paul [Fri, 22 Nov 2019 22:52:54 +0000 (14:52 -0800)]
Revert "Input: synaptics - enable RMI mode for X1 Extreme 2nd Generation"

This reverts commit 68b9c5066e39af41d3448abfc887c77ce22dd64d.

Ugh, I really dropped the ball on this one :\. So as it turns out RMI4
works perfectly fine on the X1 Extreme Gen 2 except for one thing I
didn't notice because I usually use the trackpoint: clicking with the
touchpad. Somehow this is broken, in fact we don't even seem to indicate
BTN_LEFT as a valid event type for the RMI4 touchpad. And, I don't even
see any RMI4 events coming from the touchpad when I press down on it.
This only seems to work for PS/2 mode.

Since that means we have a regression, and PS/2 mode seems to work fine
for the time being - revert this for now. We'll have to do a more
thorough investigation on this.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://lore.kernel.org/r/20191119234534.10725-1-lyude@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Fri, 22 Nov 2019 22:28:14 +0000 (14:28 -0800)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Validate tunnel options length in act_tunnel_key, from Xin Long.

 2) Fix DMA sync bug in gve driver, from Adi Suresh.

 3) TSO kills performance on some r8169 chips due to HW issues, disable
    by default in that case, from Corinna Vinschen.

 4) Fix clock disable mismatch in fec driver, from Chubong Yuan.

 5) Fix interrupt status bits define in hns3 driver, from Huazhong Tan.

 6) Fix workqueue deadlocks in qeth driver, from Julian Wiedmann.

 7) Don't napi_disable() twice in r8152 driver, from Hayes Wang.

 8) Fix SKB extension memory leak, from Florian Westphal.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (54 commits)
  r8152: avoid to call napi_disable twice
  MAINTAINERS: Add myself as maintainer of virtio-vsock
  udp: drop skb extensions before marking skb stateless
  net: rtnetlink: prevent underflows in do_setvfinfo()
  can: m_can_platform: remove unnecessary m_can_class_resume() call
  can: m_can_platform: set net_device structure as driver data
  hv_netvsc: Fix send_table offset in case of a host bug
  hv_netvsc: Fix offset usage in netvsc_send_table()
  net-ipv6: IPV6_TRANSPARENT - check NET_RAW prior to NET_ADMIN
  sfc: Only cancel the PPS workqueue if it exists
  nfc: port100: handle command failure cleanly
  net-sysfs: fix netdev_queue_add_kobject() breakage
  r8152: Re-order napi_disable in rtl8152_close
  net: qca_spi: Move reset_count to struct qcaspi
  net: qca_spi: fix receive buffer size check
  net/ibmvnic: Ignore H_FUNCTION return from H_EOI to tolerate XIVE mode
  Revert "net/ibmvnic: Fix EOI when running in XIVE mode"
  net/mlxfw: Verify FSM error code translation doesn't exceed array size
  net/mlx5: Update the list of the PCI supported devices
  net/mlx5: Fix auto group size calculation
  ...

4 years agoafs: Fix large file support
Marc Dionne [Thu, 21 Nov 2019 15:37:26 +0000 (15:37 +0000)]
afs: Fix large file support

By default s_maxbytes is set to MAX_NON_LFS, which limits the usable
file size to 2GB, enforced by the vfs.

Commit b9b1f8d5930a ("AFS: write support fixes") added support for the
64-bit fetch and store server operations, but did not change this value.
As a result, attempts to write past the 2G mark result in EFBIG errors:

 $ dd if=/dev/zero of=foo bs=1M count=1 seek=2048
 dd: error writing 'foo': File too large

Set s_maxbytes to MAX_LFS_FILESIZE.

Fixes: b9b1f8d5930a ("AFS: write support fixes")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoafs: Fix possible assert with callbacks from yfs servers
Marc Dionne [Thu, 21 Nov 2019 15:26:15 +0000 (15:26 +0000)]
afs: Fix possible assert with callbacks from yfs servers

Servers sending callback breaks to the YFS_CM_SERVICE service may
send up to YFSCBMAX (1024) fids in a single RPC.  Anything over
AFSCBMAX (50) will cause the assert in afs_break_callbacks to trigger.

Remove the assert, as the count has already been checked against
the appropriate max values in afs_deliver_cb_callback and
afs_deliver_yfs_cb_callback.

Fixes: 35dbfba3111a ("afs: Implement the YFS cache manager service")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agor8152: avoid to call napi_disable twice
Hayes Wang [Fri, 22 Nov 2019 08:21:09 +0000 (16:21 +0800)]
r8152: avoid to call napi_disable twice

Call napi_disable() twice would cause dead lock. There are three situations
may result in the issue.

1. rtl8152_pre_reset() and set_carrier() are run at the same time.
2. Call rtl8152_set_tunable() after rtl8152_close().
3. Call rtl8152_set_ringparam() after rtl8152_close().

For #1, use the same solution as commit 84811412464d ("r8152: Re-order
napi_disable in rtl8152_close"). For #2 and #3, add checking the flag
of IFF_UP and using napi_disable/napi_enable during mutex.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Fri, 22 Nov 2019 17:49:08 +0000 (09:49 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "Three fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/ksm.c: don't WARN if page is still mapped in remove_stable_node()
  mm/memory_hotplug: don't access uninitialized memmaps in shrink_zone_span()
  Revert "fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()"

4 years agoMerge tag 'linux-can-fixes-for-5.4-20191122' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Fri, 22 Nov 2019 17:42:11 +0000 (09:42 -0800)]
Merge tag 'linux-can-fixes-for-5.4-20191122' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2019-11-22

this is a pull request of 2 patches for net/master, if possible for the
current release cycle. Otherwise these patches should hit v5.4 via the
stable tree.

Both patches of this pull request target the m_can driver. Pankaj Sharma
fixes the fallout in the m_can_platform part, which appeared with the
introduction of the m_can platform framework.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMAINTAINERS: Add myself as maintainer of virtio-vsock
Stefano Garzarella [Fri, 22 Nov 2019 10:20:10 +0000 (11:20 +0100)]
MAINTAINERS: Add myself as maintainer of virtio-vsock

Since I'm actively working on vsock and virtio/vhost transports,
Stefan suggested to help him to maintain it.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoudp: drop skb extensions before marking skb stateless
Florian Westphal [Thu, 21 Nov 2019 05:56:23 +0000 (06:56 +0100)]
udp: drop skb extensions before marking skb stateless

Once udp stack has set the UDP_SKB_IS_STATELESS flag, later skb free
assumes all skb head state has been dropped already.

This will leak the extension memory in case the skb has extensions other
than the ipsec secpath, e.g. bridge nf data.

To fix this, set the UDP_SKB_IS_STATELESS flag only if we don't have
extensions or if the extension space can be free'd.

Fixes: 895b5c9f206eb7d25dc1360a ("netfilter: drop bridge nf reset from nf_reset")
Cc: Paolo Abeni <pabeni@redhat.com>
Reported-by: Byron Stanoszek <gandalf@winds.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: rtnetlink: prevent underflows in do_setvfinfo()
Dan Carpenter [Wed, 20 Nov 2019 12:34:38 +0000 (15:34 +0300)]
net: rtnetlink: prevent underflows in do_setvfinfo()

The "ivm->vf" variable is a u32, but the problem is that a number of
drivers cast it to an int and then forget to check for negatives.  An
example of this is in the cxgb4 driver.

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
  2890  static int cxgb4_mgmt_get_vf_config(struct net_device *dev,
  2891                                      int vf, struct ifla_vf_info *ivi)
                                            ^^^^^^
  2892  {
  2893          struct port_info *pi = netdev_priv(dev);
  2894          struct adapter *adap = pi->adapter;
  2895          struct vf_info *vfinfo;
  2896
  2897          if (vf >= adap->num_vfs)
                    ^^^^^^^^^^^^^^^^^^^
  2898                  return -EINVAL;
  2899          vfinfo = &adap->vfinfo[vf];
                ^^^^^^^^^^^^^^^^^^^^^^^^^^

There are 48 functions affected.

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c:8435 hclge_set_vf_vlan_filter() warn: can 'vfid' underflow 's32min-2147483646'
drivers/net/ethernet/freescale/enetc/enetc_pf.c:377 enetc_pf_set_vf_mac() warn: can 'vf' underflow 's32min-2147483646'
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:2899 cxgb4_mgmt_get_vf_config() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:2960 cxgb4_mgmt_set_vf_rate() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:3019 cxgb4_mgmt_set_vf_rate() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:3038 cxgb4_mgmt_set_vf_vlan() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:3086 cxgb4_mgmt_set_vf_link_state() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/chelsio/cxgb/cxgb2.c:791 get_eeprom() warn: can 'i' underflow 's32min-(-4),0,4-s32max'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:82 bnxt_set_vf_spoofchk() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:164 bnxt_set_vf_trust() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:186 bnxt_get_vf_config() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:228 bnxt_set_vf_mac() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:264 bnxt_set_vf_vlan() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:293 bnxt_set_vf_bw() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnxt/bnxt_sriov.c:333 bnxt_set_vf_link_state() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c:2595 bnx2x_vf_op_prep() warn: can 'vfidx' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c:2595 bnx2x_vf_op_prep() warn: can 'vfidx' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c:2281 bnx2x_post_vf_bulletin() warn: can 'vf' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c:2285 bnx2x_post_vf_bulletin() warn: can 'vf' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c:2286 bnx2x_post_vf_bulletin() warn: can 'vf' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c:2292 bnx2x_post_vf_bulletin() warn: can 'vf' underflow 's32min-63'
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c:2297 bnx2x_post_vf_bulletin() warn: can 'vf' underflow 's32min-63'
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:1832 qlcnic_sriov_set_vf_mac() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:1864 qlcnic_sriov_set_vf_tx_rate() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:1937 qlcnic_sriov_set_vf_vlan() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:2005 qlcnic_sriov_get_vf_config() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c:2036 qlcnic_sriov_set_vf_spoofchk() warn: can 'vf' underflow 's32min-254'
drivers/net/ethernet/emulex/benet/be_main.c:1914 be_get_vf_config() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/emulex/benet/be_main.c:1915 be_get_vf_config() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/emulex/benet/be_main.c:1922 be_set_vf_tvt() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/emulex/benet/be_main.c:1951 be_clear_vf_tvt() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/emulex/benet/be_main.c:2063 be_set_vf_tx_rate() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/emulex/benet/be_main.c:2091 be_set_vf_link_state() warn: can 'vf' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:2609 ice_set_vf_port_vlan() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:3050 ice_get_vf_cfg() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:3103 ice_set_vf_spoofchk() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:3181 ice_set_vf_mac() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:3237 ice_set_vf_trust() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c:3286 ice_set_vf_link_state() warn: can 'vf_id' underflow 's32min-65534'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:3919 i40e_validate_vf() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:3957 i40e_ndo_set_vf_mac() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4104 i40e_ndo_set_vf_port_vlan() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4263 i40e_ndo_set_vf_bw() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4309 i40e_ndo_get_vf_config() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4371 i40e_ndo_set_vf_link_state() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4441 i40e_ndo_set_vf_spoofchk() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4441 i40e_ndo_set_vf_spoofchk() warn: can 'vf_id' underflow 's32min-2147483646'
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c:4504 i40e_ndo_set_vf_trust() warn: can 'vf_id' underflow 's32min-2147483646'

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'pm-5.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 22 Nov 2019 17:18:16 +0000 (09:18 -0800)]
Merge tag 'pm-5.4-final' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management regression fix from Rafael Wysocki:
 "Fix problems with switching cpufreq drivers on some x86 systems with
  ACPI (and with changing the operation modes of the intel_pstate driver
  on those systems) introduced by recent changes related to the
  management of frequency limits in cpufreq"

* tag 'pm-5.4-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: QoS: Invalidate frequency QoS requests after removal

4 years agoMerge tag 'drm-fixes-2019-11-22' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 22 Nov 2019 17:14:30 +0000 (09:14 -0800)]
Merge tag 'drm-fixes-2019-11-22' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Two sets of fixes in here, one for amdgpu, and one for i915.

  The amdgpu ones are pretty small, i915's CI system seems to have a few
  problems in the last week or so, there is one major regression fix for
  fb_mmap, but there are a bunch of other issues fixed in there as well,
  oops, screen flashes and rcu related.

  amdgpu:
   - Remove experimental flag for navi14
   - Fix confusing power message failures on older VI parts
   - Hang fix for gfxoff when using the read register interface
   - Two stability regression fixes for Raven

  i915:
   - Fix kernel oops on dumb_create ioctl on no crtc situation
   - Fix bad ugly colored flash on VLV/CHV related to gamma LUT update
   - Fix unity of the frequencies reported on PMU
   - Fix kernel oops on set_page_dirty using better locks around it
   - Protect the request pointer with RCU to prevent it being freed
     while we might need still
   - Make pool objects read-only
   - Restore physical addresses for fb_map to avoid corrupted page
     table"

* tag 'drm-fixes-2019-11-22' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/fbdev: Restore physical addresses for fb_mmap()
  Revert "drm/amd/display: enable S/G for RAVEN chip"
  drm/amdgpu: disable gfxoff on original raven
  drm/amdgpu: disable gfxoff when using register read interface
  drm/amd/powerplay: correct fine grained dpm force level setting
  drm/amd/powerplay: issue no PPSMC_MSG_GetCurrPkgPwr on unsupported ASICs
  drm/amdgpu: remove experimental flag for Navi14
  drm/i915: make pool objects read-only
  drm/i915: Protect request peeking with RCU
  drm/i915/userptr: Try to acquire the page lock around set_page_dirty()
  drm/i915/pmu: "Frequency" is reported as accumulated cycles
  drm/i915: Preload LUTs if the hw isn't currently using them
  drm/i915: Don't oops in dumb_create ioctl if we have no crtcs

4 years agomm/ksm.c: don't WARN if page is still mapped in remove_stable_node()
Andrey Ryabinin [Fri, 22 Nov 2019 01:54:01 +0000 (17:54 -0800)]
mm/ksm.c: don't WARN if page is still mapped in remove_stable_node()

It's possible to hit the WARN_ON_ONCE(page_mapped(page)) in
remove_stable_node() when it races with __mmput() and squeezes in
between ksm_exit() and exit_mmap().

  WARNING: CPU: 0 PID: 3295 at mm/ksm.c:888 remove_stable_node+0x10c/0x150

  Call Trace:
   remove_all_stable_nodes+0x12b/0x330
   run_store+0x4ef/0x7b0
   kernfs_fop_write+0x200/0x420
   vfs_write+0x154/0x450
   ksys_write+0xf9/0x1d0
   do_syscall_64+0x99/0x510
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

Remove the warning as there is nothing scary going on.

Link: http://lkml.kernel.org/r/20191119131850.5675-1-aryabinin@virtuozzo.com
Fixes: cbf86cfe04a6 ("ksm: remove old stable nodes more thoroughly")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agomm/memory_hotplug: don't access uninitialized memmaps in shrink_zone_span()
David Hildenbrand [Fri, 22 Nov 2019 01:53:56 +0000 (17:53 -0800)]
mm/memory_hotplug: don't access uninitialized memmaps in shrink_zone_span()

Let's limit shrinking to !ZONE_DEVICE so we can fix the current code.
We should never try to touch the memmap of offline sections where we
could have uninitialized memmaps and could trigger BUGs when calling
page_to_nid() on poisoned pages.

There is no reliable way to distinguish an uninitialized memmap from an
initialized memmap that belongs to ZONE_DEVICE, as we don't have
anything like SECTION_IS_ONLINE we can use similar to
pfn_to_online_section() for !ZONE_DEVICE memory.

E.g., set_zone_contiguous() similarly relies on pfn_to_online_section()
and will therefore never set a ZONE_DEVICE zone consecutive.  Stopping
to shrink the ZONE_DEVICE therefore results in no observable changes,
besides /proc/zoneinfo indicating different boundaries - something we
can totally live with.

Before commit d0dc12e86b31 ("mm/memory_hotplug: optimize memory
hotplug"), the memmap was initialized with 0 and the node with the right
value.  So the zone might be wrong but not garbage.  After that commit,
both the zone and the node will be garbage when touching uninitialized
memmaps.

Toshiki reported a BUG (race between delayed initialization of
ZONE_DEVICE memmaps without holding the memory hotplug lock and
concurrent zone shrinking).

  https://lkml.org/lkml/2019/11/14/1040

"Iteration of create and destroy namespace causes the panic as below:

      kernel BUG at mm/page_alloc.c:535!
      CPU: 7 PID: 2766 Comm: ndctl Not tainted 5.4.0-rc4 #6
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014
      RIP: 0010:set_pfnblock_flags_mask+0x95/0xf0
      Call Trace:
       memmap_init_zone_device+0x165/0x17c
       memremap_pages+0x4c1/0x540
       devm_memremap_pages+0x1d/0x60
       pmem_attach_disk+0x16b/0x600 [nd_pmem]
       nvdimm_bus_probe+0x69/0x1c0
       really_probe+0x1c2/0x3e0
       driver_probe_device+0xb4/0x100
       device_driver_attach+0x4f/0x60
       bind_store+0xc9/0x110
       kernfs_fop_write+0x116/0x190
       vfs_write+0xa5/0x1a0
       ksys_write+0x59/0xd0
       do_syscall_64+0x5b/0x180
       entry_SYSCALL_64_after_hwframe+0x44/0xa9

  While creating a namespace and initializing memmap, if you destroy the
  namespace and shrink the zone, it will initialize the memmap outside
  the zone and trigger VM_BUG_ON_PAGE(!zone_spans_pfn(page_zone(page),
  pfn), page) in set_pfnblock_flags_mask()."

This BUG is also mitigated by this commit, where we for now stop to
shrink the ZONE_DEVICE zone until we can do it in a safe and clean way.

Link: http://lkml.kernel.org/r/20191006085646.5768-5-david@redhat.com
Fixes: f1dd2cd13c4b ("mm, memory_hotplug: do not associate hotadded memory to zones until online") [visible after d0dc12e86b319]
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reported-by: Toshiki Fukasawa <t-fukasawa@vx.jp.nec.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Damian Tometzki <damian.tometzki@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jun Yao <yaojun8558363@gmail.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Pankaj Gupta <pagupta@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pavel Tatashin <pavel.tatashin@microsoft.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qian Cai <cai@lca.pw>
Cc: Rich Felker <dalias@libc.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Steve Capper <steve.capper@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Yu Zhao <yuzhao@google.com>
Cc: <stable@vger.kernel.org> [4.13+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoRevert "fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()"
Joseph Qi [Fri, 22 Nov 2019 01:53:52 +0000 (17:53 -0800)]
Revert "fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()"

This reverts commit 56e94ea132bb5c2c1d0b60a6aeb34dcb7d71a53d.

Commit 56e94ea132bb ("fs: ocfs2: fix possible null-pointer dereferences
in ocfs2_xa_prepare_entry()") introduces a regression that fail to
create directory with mount option user_xattr and acl.  Actually the
reported NULL pointer dereference case can be correctly handled by
loc->xl_ops->xlo_add_entry(), so revert it.

Link: http://lkml.kernel.org/r/1573624916-83825-1-git-send-email-joseph.qi@linux.alibaba.com
Fixes: 56e94ea132bb ("fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()")
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reported-by: Thomas Voegtle <tv@lio96.de>
Acked-by: Changwei Ge <gechangwei@live.cn>
Cc: Jia-Ju Bai <baijiaju1990@gmail.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agocan: m_can_platform: remove unnecessary m_can_class_resume() call
Pankaj Sharma [Tue, 19 Nov 2019 10:20:38 +0000 (15:50 +0530)]
can: m_can_platform: remove unnecessary m_can_class_resume() call

The function m_can_runtime_resume() is getting recursively called from
m_can_class_resume(). This results in a lock up.

We need not call m_can_class_resume() during m_can_runtime_resume().

Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework")
Signed-off-by: Pankaj Sharma <pankj.sharma@samsung.com>
Signed-off-by: Sriram Dash <sriram.dash@samsung.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: m_can_platform: set net_device structure as driver data
Pankaj Sharma [Tue, 19 Nov 2019 10:20:37 +0000 (15:50 +0530)]
can: m_can_platform: set net_device structure as driver data

The current code is failing during clock prepare enable because of not
getting proper clock from platform device.

[    0.852089] Call trace:
[    0.854516]  0xffff0000fa22a668
[    0.857638]  clk_prepare+0x20/0x34
[    0.861019]  m_can_runtime_resume+0x2c/0xe4
[    0.865180]  pm_generic_runtime_resume+0x28/0x38
[    0.869770]  __rpm_callback+0x16c/0x1bc
[    0.873583]  rpm_callback+0x24/0x78
[    0.877050]  rpm_resume+0x428/0x560
[    0.880517]  __pm_runtime_resume+0x7c/0xa8
[    0.884593]  m_can_clk_start.isra.9.part.10+0x1c/0xa8
[    0.889618]  m_can_class_register+0x138/0x370
[    0.893950]  m_can_plat_probe+0x120/0x170
[    0.897939]  platform_drv_probe+0x4c/0xa0
[    0.901924]  really_probe+0xd8/0x31c
[    0.905477]  driver_probe_device+0x58/0xe8
[    0.909551]  device_driver_attach+0x68/0x70
[    0.913711]  __driver_attach+0x9c/0xf8
[    0.917437]  bus_for_each_dev+0x50/0xa0
[    0.921251]  driver_attach+0x20/0x28
[    0.924804]  bus_add_driver+0x148/0x1fc
[    0.928617]  driver_register+0x6c/0x124
[    0.932431]  __platform_driver_register+0x48/0x50
[    0.937113]  m_can_plat_driver_init+0x18/0x20
[    0.941446]  do_one_initcall+0x4c/0x19c
[    0.945259]  kernel_init_freeable+0x1d0/0x280
[    0.949591]  kernel_init+0x10/0x100
[    0.953057]  ret_from_fork+0x10/0x18
[    0.956614] Code: 00000000 00000000 00000000 00000000 (fa22a668)
[    0.962681] ---[ end trace 881f71bd609de763 ]---
[    0.967301] Kernel panic - not syncing: Attempted to kill init!

A device driver for CAN controller hardware registers itself with the
Linux network layer as a network device. So, the driver data for m_can
should ideally be of type net_device.

Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework")
Signed-off-by: Pankaj Sharma <pankj.sharma@samsung.com>
Signed-off-by: Sriram Dash <sriram.dash@samsung.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agoMerge branch 'hv_netvsc-Fix-send-indirection-table-offset'
David S. Miller [Fri, 22 Nov 2019 03:32:23 +0000 (19:32 -0800)]
Merge branch 'hv_netvsc-Fix-send-indirection-table-offset'

Haiyang Zhang says:

====================
hv_netvsc: Fix send indirection table offset

Fix send indirection table offset issues related to guest and
host bugs.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohv_netvsc: Fix send_table offset in case of a host bug
Haiyang Zhang [Thu, 21 Nov 2019 21:33:41 +0000 (13:33 -0800)]
hv_netvsc: Fix send_table offset in case of a host bug

If negotiated NVSP version <= NVSP_PROTOCOL_VERSION_6, the offset may
be wrong (too small) due to a host bug. This can cause missing the
end of the send indirection table, and add multiple zero entries from
leading zeros before the data region. This bug adds extra burden on
channel 0.

So fix the offset by computing it from the data structure sizes. This
will ensure netvsc driver runs normally on unfixed hosts, and future
fixed hosts.

Fixes: 5b54dac856cb ("hyperv: Add support for virtual Receive Side Scaling (vRSS)")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohv_netvsc: Fix offset usage in netvsc_send_table()
Haiyang Zhang [Thu, 21 Nov 2019 21:33:40 +0000 (13:33 -0800)]
hv_netvsc: Fix offset usage in netvsc_send_table()

To reach the data region, the existing code adds offset in struct
nvsp_5_send_indirect_table on the beginning of this struct. But the
offset should be based on the beginning of its container,
struct nvsp_message. This bug causes the first table entry missing,
and adds an extra zero from the zero pad after the data region.
This can put extra burden on the channel 0.

So, correct the offset usage. Also add a boundary check to ensure
not reading beyond data region.

Fixes: 5b54dac856cb ("hyperv: Add support for virtual Receive Side Scaling (vRSS)")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet-ipv6: IPV6_TRANSPARENT - check NET_RAW prior to NET_ADMIN
Maciej Żenczykowski [Thu, 21 Nov 2019 21:19:08 +0000 (13:19 -0800)]
net-ipv6: IPV6_TRANSPARENT - check NET_RAW prior to NET_ADMIN

NET_RAW is less dangerous, so more likely to be available to a process,
so check it first to prevent some spurious logging.

This matches IP_TRANSPARENT which checks NET_RAW first.

Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'drm-intel-fixes-2019-11-21' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 22 Nov 2019 00:23:22 +0000 (10:23 +1000)]
Merge tag 'drm-intel-fixes-2019-11-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix kernel oops on dumb_create ioctl on no crtc situation
- Fix bad ugly colored flash on VLV/CHV related to gamma LUT update
- Fix unity of the frequencies reported on PMU
- Fix kernel oops on set_page_dirty using better locks around it
- Protect the request pointer with RCU to prevent it being freed while we might need still
- Make pool objects read-only
- Restore physical addresses for fb_map to avoid corrupted page table

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191121165339.GA23920@intel.com
4 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Thu, 21 Nov 2019 20:15:24 +0000 (12:15 -0800)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fix from Will Deacon:
 "Ensure PAN is re-enabled following user fault in uaccess routines.

  After I thought we were done for 5.4, we had a report this week of a
  nasty issue that has been shown to leak data between different user
  address spaces thanks to corruption of entries in the TLB. In
  hindsight, we should have spotted this in review when the PAN code was
  merged back in v4.3, but hindsight is 20/20 and I'm trying not to beat
  myself up too much about it despite being fairly miserable.

  Anyway, the fix is "obvious" but the actual failure is more more
  subtle, and is described in the commit message. I've included a fairly
  mechanical follow-up patch here as well, which moves this checking out
  into the C wrappers which is what we do for {get,put}_user() already
  and allows us to remove these bloody assembly macros entirely. The
  patches have passed kernelci [1] [2] [3] and CKI [4] tests over night,
  as well as some targetted testing [5] for this particular issue.

  The first patch is tagged for stable and should be applied to 4.14,
  4.19 and 5.3. I have separate backports for 4.4 and 4.9, which I'll
  send out once this has landed in your tree (although the original
  patch applies cleanly, it won't build for those two trees).

  Thanks to Pavel Tatashin for reporting this and Mark Rutland for
  helping to diagnose the issue and review/test the solution"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: uaccess: Remove uaccess_*_not_uao asm macros
  arm64: uaccess: Ensure PAN is re-enabled after unhandled uaccess fault

4 years agosfc: Only cancel the PPS workqueue if it exists
Martin Habets [Thu, 21 Nov 2019 17:52:15 +0000 (17:52 +0000)]
sfc: Only cancel the PPS workqueue if it exists

The workqueue only exists for the primary PF. For other functions
we hit a WARN_ON in kernel/workqueue.c.

Fixes: 7c236c43b838 ("sfc: Add support for IEEE-1588 PTP")
Signed-off-by: Martin Habets <mhabets@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'for-linus-20191121' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 21 Nov 2019 20:04:50 +0000 (12:04 -0800)]
Merge tag 'for-linus-20191121' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Just a single fix for an issue in nbd introduced in this cycle"

* tag 'for-linus-20191121' of git://git.kernel.dk/linux-block:
  nbd:fix memory leak in nbd_get_socket()

4 years agoMerge tag 'gpio-v5.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Thu, 21 Nov 2019 20:01:30 +0000 (12:01 -0800)]
Merge tag 'gpio-v5.4-5' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "A last set of small fixes for GPIO, this cycle was quite busy.

   - Fix debounce delays on the MAX77620 GPIO expander

   - Use the correct unit for debounce times on the BD70528 GPIO expander

   - Get proper deps for parallel builds of the GPIO tools

   - Add a specific ACPI quirk for the Terra Pad 1061"

* tag 'gpio-v5.4-5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpiolib: acpi: Add Terra Pad 1061 to the run_edge_events_on_boot_blacklist
  tools: gpio: Correctly add make dependencies for gpio_utils
  gpio: bd70528: Use correct unit for debounce times
  gpio: max77620: Fixup debounce delays

4 years agoMerge tag 'for-linus-2019-11-21' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 21 Nov 2019 19:51:49 +0000 (11:51 -0800)]
Merge tag 'for-linus-2019-11-21' of git://git./linux/kernel/git/brauner/linux

Pull pidfd fixlet from Christian Brauner:
 "This contains a simple fix for the pidfd poll method. In the original
  patchset pidfd_poll() was made to return an unsigned int. However, the
  poll method is defined to return a __poll_t. While the unsigned int is
  not a huge deal it's just nicer to return a __poll_t.

  I've decided to send it right before the 5.4 release mainly so that
  stable doesn't need to backport it to both 5.4 and 5.3"

* tag 'for-linus-2019-11-21' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  fork: fix pidfd_poll()'s return type

4 years agonfc: port100: handle command failure cleanly
Oliver Neukum [Thu, 21 Nov 2019 10:37:10 +0000 (11:37 +0100)]
nfc: port100: handle command failure cleanly

If starting the transfer of a command suceeds but the transfer for the reply
fails, it is not enough to initiate killing the transfer for the
command may still be running. You need to wait for the killing to finish
before you can reuse URB and buffer.

Reported-and-tested-by: syzbot+711468aa5c3a1eabf863@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodrm/i915/fbdev: Restore physical addresses for fb_mmap()
Chris Wilson [Wed, 13 Nov 2019 18:06:33 +0000 (18:06 +0000)]
drm/i915/fbdev: Restore physical addresses for fb_mmap()

fbdev uses the physical address of our framebuffer for its fb_mmap()
routine. While we need to adapt this address for the new io BAR, we have
to fix v5.4 first! The simplest fix is to restore the smem back to v5.3
and we will then probably have to implement our fbops->fb_mmap() callback
to handle local memory.

Reported-by: Neil MacLeod <freedesktop@nmacleod.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112256
Fixes: 5f889b9a61dd ("drm/i915: Disregard drm_mode_config.fb_base")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Tested-by: Neil MacLeod <freedesktop@nmacleod.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191113180633.3947-1-chris@chris-wilson.co.uk
(cherry picked from commit abc5520704ab438099fe352636b30b05c1253bea)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 9faf5fa4d3dad3b0c0fa6e67689c144981a11c27)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
4 years agonet-sysfs: fix netdev_queue_add_kobject() breakage
Eric Dumazet [Thu, 21 Nov 2019 03:19:07 +0000 (19:19 -0800)]
net-sysfs: fix netdev_queue_add_kobject() breakage

kobject_put() should only be called in error path.

Fixes: b8eb718348b8 ("net-sysfs: Fix reference count leak in rx|netdev_queue_add_kobject")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jouni Hogander <jouni.hogander@unikie.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'drm-fixes-5.4-2019-11-20' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Thu, 21 Nov 2019 05:07:35 +0000 (15:07 +1000)]
Merge tag 'drm-fixes-5.4-2019-11-20' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

drm-fixes-5.4-2019-11-20:

amdgpu:
- Remove experimental flag for navi14
- Fix confusing power message failures on older VI parts
- Hang fix for gfxoff when using the read register interface
- Two stability regression fixes for Raven

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191120235130.23755-1-alexander.deucher@amd.com
4 years agoRevert "drm/amd/display: enable S/G for RAVEN chip"
Alex Deucher [Fri, 15 Nov 2019 15:26:52 +0000 (10:26 -0500)]
Revert "drm/amd/display: enable S/G for RAVEN chip"

This reverts commit 1c4259159132ae4ceaf7c6db37a6cf76417f73d9.

S/G display is not stable with the IOMMU enabled on some
platforms.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=205523
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amdgpu: disable gfxoff on original raven
Alex Deucher [Fri, 15 Nov 2019 15:21:23 +0000 (10:21 -0500)]
drm/amdgpu: disable gfxoff on original raven

There are still combinations of sbios and firmware that
are not stable.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=204689
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amdgpu: disable gfxoff when using register read interface
Alex Deucher [Thu, 14 Nov 2019 16:39:05 +0000 (11:39 -0500)]
drm/amdgpu: disable gfxoff when using register read interface

When gfxoff is enabled, accessing gfx registers via MMIO
can lead to a hang.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=205497
Acked-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amd/powerplay: correct fine grained dpm force level setting
Evan Quan [Thu, 14 Nov 2019 08:58:31 +0000 (16:58 +0800)]
drm/amd/powerplay: correct fine grained dpm force level setting

For fine grained dpm, there is only two levels supported. However
to reflect correctly the current clock frequency, there is an
intermediate level faked. Thus on forcing level setting, we
need to treat level 2 correctly as level 1.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
4 years agodrm/amd/powerplay: issue no PPSMC_MSG_GetCurrPkgPwr on unsupported ASICs
Evan Quan [Thu, 14 Nov 2019 07:30:39 +0000 (15:30 +0800)]
drm/amd/powerplay: issue no PPSMC_MSG_GetCurrPkgPwr on unsupported ASICs

Otherwise, the error message prompted will confuse user.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amdgpu: remove experimental flag for Navi14
Alex Deucher [Fri, 15 Nov 2019 14:38:28 +0000 (09:38 -0500)]
drm/amdgpu: remove experimental flag for Navi14

5.4 and newer works fine with navi14.

Reviewed-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
4 years agoMerge tag 'mlx5-fixes-2019-11-20' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Wed, 20 Nov 2019 20:56:32 +0000 (12:56 -0800)]
Merge tag 'mlx5-fixes-2019-11-20' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2019-11-20

This series introduces some fixes to mlx5 driver.

Please pull and let me know if there is any problem.

For -stable v4.9:
 ('net/mlx5e: Fix set vf link state error flow')

For -stable v4.14
 ('net/mlxfw: Verify FSM error code translation doesn't exceed array size')

For -stable v4.19
 ('net/mlx5: Fix auto group size calculation')

For -stable v5.3
 ('net/mlx5e: Fix error flow cleanup in mlx5e_tc_tun_create_header_ipv4/6')
 ('net/mlx5e: Do not use non-EXT link modes in EXT mode')
 ('net/mlx5: Update the list of the PCI supported devices')
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agor8152: Re-order napi_disable in rtl8152_close
Prashant Malani [Wed, 20 Nov 2019 19:40:21 +0000 (11:40 -0800)]
r8152: Re-order napi_disable in rtl8152_close

Both rtl_work_func_t() and rtl8152_close() call napi_disable().
Since the two calls aren't protected by a lock, if the close
function starts executing before the work function, we can get into a
situation where the napi_disable() function is called twice in
succession (first by rtl8152_close(), then by set_carrier()).

In such a situation, the second call would loop indefinitely, since
rtl8152_close() doesn't call napi_enable() to clear the NAPI_STATE_SCHED
bit.

The rtl8152_close() function in turn issues a
cancel_delayed_work_sync(), and so it would wait indefinitely for the
rtl_work_func_t() to complete. Since rtl8152_close() is called by a
process holding rtnl_lock() which is requested by other processes, this
eventually leads to a system deadlock and crash.

Re-order the napi_disable() call to occur after the work function
disabling and urb cancellation calls are issued.

Change-Id: I6ef0b703fc214998a037a68f722f784e1d07815e
Reported-by: http://crbug.com/1017928
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'qca_spi-fixes'
David S. Miller [Wed, 20 Nov 2019 20:42:23 +0000 (12:42 -0800)]
Merge branch 'qca_spi-fixes'

Stefan Wahren says:

====================
net: qca_spi: Fix receive and reset issues

This small patch series fixes two major issues in the SPI driver for the
QCA700x.

It has been tested on a Charge Control C 300 (NXP i.MX6ULL +
2x QCA7000).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qca_spi: Move reset_count to struct qcaspi
Stefan Wahren [Wed, 20 Nov 2019 17:29:13 +0000 (18:29 +0100)]
net: qca_spi: Move reset_count to struct qcaspi

The reset counter is specific for every QCA700x chip. So move this
into the private driver struct. Otherwise we get unpredictable reset
behavior in setups with multiple QCA700x chips.

Fixes: 291ab06ecf67 (net: qualcomm: new Ethernet over SPI driver for QCA7000)
Signed-off-by: Stefan Wahren <stefan.wahren@in-tech.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: qca_spi: fix receive buffer size check
Michael Heimpold [Wed, 20 Nov 2019 17:29:12 +0000 (18:29 +0100)]
net: qca_spi: fix receive buffer size check

When receiving many or larger packets, e.g. when doing a file download,
it was observed that the read buffer size register reports up to 4 bytes
more than the current define allows in the check.
If this is the case, then no data transfer is initiated to receive the
packets (and thus to empty the buffer) which results in a stall of the
interface.

These 4 bytes are a hardware generated frame length which is prepended
to the actual frame, thus we have to respect it during our check.

Fixes: 026b907d58c4 ("net: qca_spi: Add available buffer space verification")
Signed-off-by: Michael Heimpold <michael.heimpold@in-tech.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'ibmvnic-regression'
David S. Miller [Wed, 20 Nov 2019 20:37:15 +0000 (12:37 -0800)]
Merge branch 'ibmvnic-regression'

Juliet Kim says:

====================
Support both XIVE and XICS modes in ibmvnic

This series aims to support both XICS and XIVE with avoiding
a regression in behavior when a system runs in XICS mode.

Patch 1 reverts commit 11d49ce9f7946dfed4dcf5dbde865c78058b50ab
(“net/ibmvnic: Fix EOI when running in XIVE mode.”)

Patch 2 Ignore H_FUNCTION return from H_EOI to tolerate XIVE mode
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/ibmvnic: Ignore H_FUNCTION return from H_EOI to tolerate XIVE mode
Juliet Kim [Wed, 20 Nov 2019 15:50:04 +0000 (10:50 -0500)]
net/ibmvnic: Ignore H_FUNCTION return from H_EOI to tolerate XIVE mode

Reversion of commit 11d49ce9f7946dfed4dcf5dbde865c78058b50ab
(“net/ibmvnic: Fix EOI when running in XIVE mode.”) leaves us
calling H_EOI even in XIVE mode. That will fail with H_FUNCTION
because H_EOI is not supported in that mode. That failure is
harmless. Ignore it so we can use common code for both XICS and
XIVE.

Signed-off-by: Juliet Kim <julietk@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoRevert "net/ibmvnic: Fix EOI when running in XIVE mode"
Juliet Kim [Wed, 20 Nov 2019 15:50:03 +0000 (10:50 -0500)]
Revert "net/ibmvnic: Fix EOI when running in XIVE mode"

This reverts commit 11d49ce9f7946dfed4dcf5dbde865c78058b50ab
(“net/ibmvnic: Fix EOI when running in XIVE mode.”) since that
has the unintended effect of changing the interrupt priority
and emits warning when running in legacy XICS mode.

Signed-off-by: Juliet Kim <julietk@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/mlxfw: Verify FSM error code translation doesn't exceed array size
Eran Ben Elisha [Sun, 17 Nov 2019 08:18:59 +0000 (10:18 +0200)]
net/mlxfw: Verify FSM error code translation doesn't exceed array size

Array mlxfw_fsm_state_err_str contains value to string translation, when
values are provided by mlxfw_dev. If value is larger than
MLXFW_FSM_STATE_ERR_MAX, return "unknown error" as expected instead of
reading an address than exceed array size.

Fixes: 410ed13cae39 ("Add the mlxfw module for Mellanox firmware flash process")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Update the list of the PCI supported devices
Shani Shapp [Tue, 12 Nov 2019 13:10:00 +0000 (15:10 +0200)]
net/mlx5: Update the list of the PCI supported devices

Add the upcoming ConnectX-6 LX device ID.

Fixes: 85327a9c4150 ("net/mlx5: Update the list of the PCI supported devices")
Signed-off-by: Shani Shapp <shanish@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Fix auto group size calculation
Maor Gottlieb [Thu, 5 Sep 2019 06:56:10 +0000 (09:56 +0300)]
net/mlx5: Fix auto group size calculation

Once all the large flow groups (defined by the user when the flow table
is created - max_num_groups) were created, then all the following new
flow groups will have only one flow table entry, even though the flow table
has place to larger groups.
Fix the condition to prefer large flow group.

Fixes: f0d22d187473 ("net/mlx5_core: Introduce flow steering autogrouped flow table")
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Add missing capability bit check for IP-in-IP
Marina Varshaver [Tue, 19 Nov 2019 16:52:13 +0000 (18:52 +0200)]
net/mlx5e: Add missing capability bit check for IP-in-IP

Device that doesn't support IP-in-IP offloads has to filter csum and gso
offload support, otherwise kernel will conclude that device is capable of
offloading csum and gso for IP-in-IP tunnels and that might result in
IP-in-IP tunnel not functioning.

Fixes: 25948b87dda2 ("net/mlx5e: Support TSO and TX checksum offloads for IP-in-IP")
Signed-off-by: Marina Varshaver <marinav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Do not use non-EXT link modes in EXT mode
Eran Ben Elisha [Sun, 17 Nov 2019 13:17:05 +0000 (15:17 +0200)]
net/mlx5e: Do not use non-EXT link modes in EXT mode

On some old Firmwares, connector type value was not supported, and value
read from FW was 0. For those, driver used link mode in order to set
connector type in link_ksetting.

After FW exposed the connector type, driver translated the value to ethtool
definitions. However, as 0 is a valid value, before returning PORT_OTHER,
driver run the check of link mode in order to maintain backward
compatibility.

Cited patch added support to EXT mode.  With both features (connector type
and EXT link modes) ,if connector_type read from FW is 0 and EXT mode is
set, driver mistakenly compare EXT link modes to non-EXT link mode.
Fixed that by skipping this comparison if we are in EXT mode, as connector
type value is valid in this scenario.

Fixes: 6a897372417e ("net/mlx5: ethtool, Add ethtool support for 50Gbps per lane link modes")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix set vf link state error flow
Roi Dayan [Wed, 13 Nov 2019 12:42:00 +0000 (14:42 +0200)]
net/mlx5e: Fix set vf link state error flow

Before this commit the ndo always returned success.
Fix that.

Fixes: 1ab2068a4c66 ("net/mlx5: Implement vports admin state backup/restore")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: DR, Limit STE hash table enlarge based on bytemask
Alex Vesker [Sun, 10 Nov 2019 13:39:36 +0000 (15:39 +0200)]
net/mlx5: DR, Limit STE hash table enlarge based on bytemask

When an ste hash table has too many collision we enlarge it
to a bigger hash table (rehash). Rehashing collision improvement
depends on the bytemask value. The more 1 bits we have in bytemask
means better spreading in the table.

Without this fix tables can grow in size without providing any
improvement which can lead to memory depletion and failures.

This patch will limit table rehash to reduce memory and improve
the performance.

Fixes: 41d07074154c ("net/mlx5: DR, Expose steering rule functionality")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: DR, Skip rehash for tables with byte mask zero
Alex Vesker [Thu, 31 Oct 2019 13:24:59 +0000 (15:24 +0200)]
net/mlx5: DR, Skip rehash for tables with byte mask zero

The byte mask fields affect on the hash index distribution,
when the byte mask is zero, the hash calculation will always
be equal to the same index.

To avoid unneeded rehash of hash tables mark the table to skip
rehash.

This is needed by the next patch which will limit table rehash
to reduce memory consumption.

Fixes: 41d07074154c ("net/mlx5: DR, Expose steering rule functionality")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: DR, Fix invalid EQ vector number on CQ creation
Alex Vesker [Mon, 4 Nov 2019 09:59:21 +0000 (11:59 +0200)]
net/mlx5: DR, Fix invalid EQ vector number on CQ creation

When creating a CQ, the CPU id is used for the vector value.
This would fail in-case the CPU id was higher than the maximum
vector value.

Fixes: 297cccebdc5a ("net/mlx5: DR, Expose an internal API to issue RDMA operations")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>