06.07.2021 03:57, Peter Chen пишет:

On 21-07-05 01:54:26, Dmitry Osipenko wrote:

quoted

The HNP work can be re-scheduled while it's still in-fly. This results in
re-initialization of the busy work, resetting the hrtimer's list node of
the work and crashing kernel with null dereference within kernel/timer
once work's timer is expired. It's very easy to trigger this problem by
re-plugging USB cable quickly. Initialize HNP work only once to fix this
trouble.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>

Acked-by: Peter Chen <peter.chen@kernel.org>

It is better to append kernel dump if you have v4 patchset.

The stacktrace isn't very useful because it crashes within a hrtimer
code from a work thread, i.e. it doesn't point at usb at all. It
actually took me some effort to find where the bug was.