On Mon, 09 May 2022, Eric Biggers wrote: > 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. It sure is. Haimin, are you planning a v3? -- Lee Jones [李琼斯] Principal Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
