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authorZou Wei <zou_wei@huawei.com>2021-05-11 15:04:51 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-07-20 16:05:47 +0200
commita173e3b62cf6dd3c4a0a10c8a82eedfcae81a566 (patch)
treed108e3a92b39a17d8d0c42e5302bae83bd40fdf0 /drivers/watchdog/w83877f_wdt.c
parenta397cb4576fc2fc802562418b3a50b8f67d60d31 (diff)
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watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff()
[ Upstream commit 90b7c141132244e8e49a34a4c1e445cce33e07f4 ] 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> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/1620716691-108460-1-git-send-email-zou_wei@huawei.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/watchdog/w83877f_wdt.c')
0 files changed, 0 insertions, 0 deletions