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Revision 7ff57e98fb78ad94edafbdc7435f2d745e9e6bb5 authored by Fabio M. De Francesco on 23 February 2022, 10:02:52 UTC, committed by Jakub Kicinski on 24 February 2022, 17:09:33 UTC 
net/smc: Use a mutex for locking "struct smc_pnettable"
 
smc_pnetid_by_table_ib() uses read_lock() and then it calls smc_pnet_apply_ib()
which, in turn, calls mutex_lock(&smc_ib_devices.mutex).

read_lock() disables preemption. Therefore, the code acquires a mutex while in
atomic context and it leads to a SAC bug.

Fix this bug by replacing the rwlock with a mutex.

Reported-and-tested-by: syzbot+4f322a6d84e991c38775@syzkaller.appspotmail.com
Fixes: 64e28b52c7a6 ("net/smc: add pnet table namespace support")
Confirmed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20220223100252.22562-1-fmdefrancesco@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Raw File
v3d.rst 
=====================================
 drm/v3d Broadcom V3D Graphics Driver
=====================================

.. kernel-doc:: drivers/gpu/drm/v3d/v3d_drv.c
   :doc: Broadcom V3D Graphics Driver

GPU buffer object (BO) management
---------------------------------

.. kernel-doc:: drivers/gpu/drm/v3d/v3d_bo.c
   :doc: V3D GEM BO management support

Address space management
===========================================
.. kernel-doc:: drivers/gpu/drm/v3d/v3d_mmu.c
   :doc: Broadcom V3D MMU

GPU Scheduling
===========================================
.. kernel-doc:: drivers/gpu/drm/v3d/v3d_sched.c
   :doc: Broadcom V3D scheduling

Interrupts
--------------

.. kernel-doc:: drivers/gpu/drm/v3d/v3d_irq.c
   :doc: Interrupt management for the V3D engine
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