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(parent: 821d12a) | patch
io_uring: fix racy IOPOLL completions
authorPavel Begunkov <asml.silence@gmail.com>
Sun, 6 Dec 2020 22:22:43 +0000 (22:22 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 Dec 2020 10:54:03 +0000 (11:54 +0100)
commitf961c2b496e60214a5913857958238e6ca0e1c0e
tree746ee6e371b248c3291a110426db85124b463f3atree | snapshot
parent821d12a15cc264f3597c93dc5d44d6e9bbf9f3a3commit | diff
io_uring: fix racy IOPOLL completions

commit 31bff9a51b264df6d144931a6a5f1d6cc815ed4b upstream.

IOPOLL allows buffer remove/provide requests, but they doesn't
synchronise by rules of IOPOLL, namely it have to hold uring_lock.

Cc: <stable@vger.kernel.org> # 5.7+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/io_uring.c diff | blob | history