linux-brain/drivers/isdn
Zou Wei 3ecd228c63 mISDN: fix possible use-after-free in HFC_cleanup()
[ Upstream commit 009fc857c5f6fda81f2f7dd851b2d54193a8e733 ]

This module's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.

Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-19 08:53:08 +02:00
..
capi isdn: capi: fix mismatched prototypes 2021-05-22 11:38:27 +02:00
hardware mISDN: fix possible use-after-free in HFC_cleanup() 2021-07-19 08:53:08 +02:00
mISDN misdn: dsp: select CONFIG_BITREVERSE 2021-01-19 18:26:15 +01:00
Kconfig isdn: move capi drivers to staging 2019-05-31 11:17:41 +02:00
Makefile isdn: move capi drivers to staging 2019-05-31 11:17:41 +02:00