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>
1 parent e13ad14
adm1177.rst
Kernel driver adm1177
=====================
Supported chips:
* Analog Devices ADM1177
Prefix: 'adm1177'
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1177.pdf
Author: Beniamin Bia <beniamin.bia@analog.com>
Description
-----------
This driver supports hardware monitoring for Analog Devices ADM1177
Hot-Swap Controller and Digital Power Monitors with Soft Start Pin.
Usage Notes
-----------
This driver does not auto-detect devices. You will have to instantiate the
devices explicitly. Please see Documentation/i2c/instantiating-devices.rst
for details.
Sysfs entries
-------------
The following attributes are supported. Current maxim attribute
is read-write, all other attributes are read-only.
in0_input Measured voltage in microvolts.
curr1_input Measured current in microamperes.
curr1_max_alarm Overcurrent alarm in microamperes.
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