Messages in this thread | | | Date | Mon, 9 May 2022 13:50:25 -0700 | From | Eric Biggers <> | Subject | Re: [PATCH v2] fs/pipe: Deinitialize the watch_queue when pipe is freed |
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On Mon, May 09, 2022 at 09:17:26PM +0800, Haimin Zhang wrote: > From: Haimin Zhang <tcs_kernel@tencent.com> > > 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@tencent.com> > Signed-off-by: Haimin Zhang <tcs_kernel@tencent.com>
Is this fixing something? If so it should have a "Fixes" tag.
- Eric
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