Re: general protection fault in snd_ctl_release

On Wed, 02 Sep 2020 17:35:30 +0200, Al Viro wrote:

On Wed, Sep 02, 2020 at 05:22:00PM +0200, Takashi Iwai wrote:

...

Marc, Al, could you guys check this bug?

That's racy; the first one should be get_file_rcu() instead of file_count()+get_file(), the second is not needed at all (we have the file pinned down by the caller).

Yeah, that wasn't meant as a fix, of course :)

See vfs.git#work.epoll for fix

Thanks! I'll try to run with this fix.

Takashi