io_uring: fortify tctx/io_wq cleanup

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We don't want anyone poking into tctx->io_wq awhile it's being destroyed
by io_wq_put_and_exit(), and even though it shouldn't even happen, if
buggy would be preferable to get a NULL-deref instead of subtle delayed
failure or UAF.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/827b021de17926fd807610b3e53a5a5fa8530856.1621513214.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-05-20 13:21:20 +01:00 • committed by Jens Axboe

parent 7a27472770

commit ba5ef6dc8a

1 changed files with 4 additions and 4 deletions

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fs/io_uring.c

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