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
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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w1.rst
======================
W1: Dallas' 1-wire bus
======================
:Author: David Fries
W1 API internal to the kernel
=============================
include/linux/w1.h
~~~~~~~~~~~~~~~~~~
W1 kernel API functions.
.. kernel-doc:: include/linux/w1.h
:internal:
drivers/w1/w1.c
~~~~~~~~~~~~~~~
W1 core functions.
.. kernel-doc:: drivers/w1/w1.c
:internal:
drivers/w1/w1_family.c
~~~~~~~~~~~~~~~~~~~~~~~
Allows registering device family operations.
.. kernel-doc:: drivers/w1/w1_family.c
:export:
drivers/w1/w1_internal.h
~~~~~~~~~~~~~~~~~~~~~~~~
W1 internal initialization for master devices.
.. kernel-doc:: drivers/w1/w1_internal.h
:internal:
drivers/w1/w1_int.c
~~~~~~~~~~~~~~~~~~~~
W1 internal initialization for master devices.
.. kernel-doc:: drivers/w1/w1_int.c
:export:
drivers/w1/w1_netlink.h
~~~~~~~~~~~~~~~~~~~~~~~~
W1 external netlink API structures and commands.
.. kernel-doc:: drivers/w1/w1_netlink.h
:internal:
drivers/w1/w1_io.c
~~~~~~~~~~~~~~~~~~~
W1 input/output.
.. kernel-doc:: drivers/w1/w1_io.c
:export:
.. kernel-doc:: drivers/w1/w1_io.c
:internal:
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