Re: [PATCH -next] watchdog: Fix possible use-after-free by calling del_timer_sync()
From: Vladimir Zapolskiy <vz@mleia.com>
Date: 2021-05-12 19:36:46
Also in:
linux-watchdog, lkml
On 5/12/21 9:57 AM, Zou Wei wrote:
This driver'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 <redacted> Signed-off-by: Zou Wei <redacted>
Acked-by: Vladimir Zapolskiy <vz@mleia.com> -- Best wishes, Vladimir _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel