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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ir35221.rst
Kernel driver ir35221
=====================
Supported chips:
* Infineon IR35221
Prefix: 'ir35221'
Addresses scanned: -
Datasheet: Datasheet is not publicly available.
Author: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Description
-----------
IR35221 is a Digital DC-DC Multiphase Converter
Usage Notes
-----------
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Example: the following commands will load the driver for an IR35221
at address 0x70 on I2C bus #4::
# modprobe ir35221
# echo ir35221 0x70 > /sys/bus/i2c/devices/i2c-4/new_device
Sysfs attributes
----------------
======================= =======================================================
curr1_label "iin"
curr1_input Measured input current
curr1_max Maximum current
curr1_max_alarm Current high alarm
curr[2-3]_label "iout[1-2]"
curr[2-3]_input Measured output current
curr[2-3]_crit Critical maximum current
curr[2-3]_crit_alarm Current critical high alarm
curr[2-3]_highest Highest output current
curr[2-3]_lowest Lowest output current
curr[2-3]_max Maximum current
curr[2-3]_max_alarm Current high alarm
in1_label "vin"
in1_input Measured input voltage
in1_crit Critical maximum input voltage
in1_crit_alarm Input voltage critical high alarm
in1_highest Highest input voltage
in1_lowest Lowest input voltage
in1_min Minimum input voltage
in1_min_alarm Input voltage low alarm
in[2-3]_label "vout[1-2]"
in[2-3]_input Measured output voltage
in[2-3]_lcrit Critical minimum output voltage
in[2-3]_lcrit_alarm Output voltage critical low alarm
in[2-3]_crit Critical maximum output voltage
in[2-3]_crit_alarm Output voltage critical high alarm
in[2-3]_highest Highest output voltage
in[2-3]_lowest Lowest output voltage
in[2-3]_max Maximum output voltage
in[2-3]_max_alarm Output voltage high alarm
in[2-3]_min Minimum output voltage
in[2-3]_min_alarm Output voltage low alarm
power1_label "pin"
power1_input Measured input power
power1_alarm Input power high alarm
power1_max Input power limit
power[2-3]_label "pout[1-2]"
power[2-3]_input Measured output power
power[2-3]_max Output power limit
power[2-3]_max_alarm Output power high alarm
temp[1-2]_input Measured temperature
temp[1-2]_crit Critical high temperature
temp[1-2]_crit_alarm Chip temperature critical high alarm
temp[1-2]_highest Highest temperature
temp[1-2]_lowest Lowest temperature
temp[1-2]_max Maximum temperature
temp[1-2]_max_alarm Chip temperature high alarm
======================= =======================================================
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