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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
fsp-3y.rst 
.. SPDX-License-Identifier: GPL-2.0

Kernel driver fsp3y
======================
Supported devices:
  * 3Y POWER YH-5151E
  * 3Y POWER YM-2151E

Author: Václav Kubernát <kubernat@cesnet.cz>

Description
-----------
This driver implements limited support for two 3Y POWER devices.

Sysfs entries
-------------
  * in1_input            input voltage
  * in2_input            12V output voltage
  * in3_input            5V output voltage
  * curr1_input          input current
  * curr2_input          12V output current
  * curr3_input          5V output current
  * fan1_input           fan rpm
  * temp1_input          temperature 1
  * temp2_input          temperature 2
  * temp3_input          temperature 3
  * power1_input         input power
  * power2_input         output power
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