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SubjectRe: [syzbot] possible deadlock in vm_mmap_pgoff
On Wed, Apr 28, 2021 at 09:30:18AM -0400, Steven Rostedt wrote:

> > Break the lock chain by asking kworker to destroy perf event.
> > Thoughts other than workqueue are appreciated.
>
> I think this could cause a problem with the delay.
>
> This is called from event->destroy()
>
>
> if (event->destroy)
> event->destroy(event);
> module_put(pmu->module);

The uprobe and tracepoint pmus will never be a module.

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