a test for CVE-2020-29373 (AF_UNIX path resolution)

Add a regression test for CVE-2020-29373 where io-wq do path resolution
issuing sendmsg, but doesn't have proper fs set up.

Reported-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 files changed