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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tps40422.rst
Kernel driver tps40422
======================
Supported chips:
* TI TPS40422
Prefix: 'tps40422'
Addresses scanned: -
Datasheet: https://www.ti.com/lit/gpn/tps40422
Author: Zhu Laiwen <richard.zhu@nsn.com>
Description
-----------
This driver supports TI TPS40422 Dual-Output or Two-Phase Synchronous Buck
Controller with PMBus
The driver is a client driver to the core PMBus driver.
Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
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.
Platform data support
---------------------
The driver supports standard PMBus driver platform data.
Sysfs entries
-------------
The following attributes are supported.
======================= =======================================================
in[1-2]_label "vout[1-2]"
in[1-2]_input Measured voltage. From READ_VOUT register.
in[1-2]_alarm voltage alarm.
curr[1-2]_input Measured current. From READ_IOUT register.
curr[1-2]_label "iout[1-2]"
curr1_max Maximum current. From IOUT_OC_WARN_LIMIT register.
curr1_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT
register.
curr1_max_alarm Current high alarm. From IOUT_OC_WARN_LIMIT status.
curr1_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
curr2_alarm Current high alarm. From IOUT_OC_WARNING status.
temp1_input Measured temperature. From READ_TEMPERATURE_2 register
on page 0.
temp1_max Maximum temperature. From OT_WARN_LIMIT register.
temp1_crit Critical high temperature. From OT_FAULT_LIMIT register.
temp1_max_alarm Chip temperature high alarm. Set by comparing
READ_TEMPERATURE_2 on page 0 with OT_WARN_LIMIT if
TEMP_OT_WARNING status is set.
temp1_crit_alarm Chip temperature critical high alarm. Set by comparing
READ_TEMPERATURE_2 on page 0 with OT_FAULT_LIMIT if
TEMP_OT_FAULT status is set.
temp2_input Measured temperature. From READ_TEMPERATURE_2 register
on page 1.
temp2_alarm Chip temperature alarm on page 1.
======================= =======================================================
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