user/sven/linux.git/drivers/peci/cpu.c, branch v6.2.7Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v6.2.72022-08-15T18:31:35Zpeci: cpu: Fix use-after-free in adev_release()2022-08-15T18:31:35ZIwona Winiarskaiwona.winiarska@intel.com2022-07-05T10:15:01Zurn:sha1:1c11289b34ab67ed080bbe0f1855c4938362d9cf
When auxiliary_device_add() returns an error, auxiliary_device_uninit()
is called, which causes refcount for device to be decremented and
.release callback will be triggered.
Because adev_release() re-calls auxiliary_device_uninit(), it will cause
use-after-free:
[ 1269.455172] WARNING: CPU: 0 PID: 14267 at lib/refcount.c:28 refcount_warn_saturate+0x110/0x15
[ 1269.464007] refcount_t: underflow; use-after-free.
Reported-by: Jianglei Nie <niejianglei2021@163.com>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20220705101501.298395-1-iwona.winiarska@intel.com
peci: Add peci-cpu driver2022-02-09T07:04:44ZIwona Winiarskaiwona.winiarska@intel.com2022-02-08T15:36:35Zurn:sha1:93e1821c80f9460c8931dc4bc090ede794f966cd
PECI is an interface that may be used by different types of devices.
Add a peci-cpu driver compatible with Intel processors. The driver is
responsible for handling auxiliary devices that can subsequently be used
by other drivers (e.g. hwmons).
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20220208153639.255278-10-iwona.winiarska@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>