On Mon, May 09, 2022 at 09:17:26PM +0800, Haimin Zhang wrote: > From: Haimin Zhang <tcs_kernel@xxxxxxxxxxx> > > Add a new function call to deinitialize the watch_queue of a freed pipe. > When a pipe node is freed, it doesn't make pipe->watch_queue->pipe null. > Later when function post_one_notification is called, it will use this > field, but it has been freed and watch_queue->pipe is a dangling pointer. > It makes a uaf issue. > Check wqueu->defunct before pipe check since pipe becomes invalid once all > watch queues were cleared. > > Reported-by: TCS Robot <tcs_robot@xxxxxxxxxxx> > Signed-off-by: Haimin Zhang <tcs_kernel@xxxxxxxxxxx> Is this fixing something? If so it should have a "Fixes" tag. - Eric
