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Commit 8579538c authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
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io_uring/msg_ring: fix remote queue to disabled ring



IORING_SETUP_R_DISABLED rings don't have the submitter task set, so
it's not always safe to use ->submitter_task. Disallow posting msg_ring
messaged to disabled rings. Also add task NULL check for loosy sync
around testing for IORING_SETUP_R_DISABLED.

Cc: stable@vger.kernel.org
Fixes: 6d043ee1 ("io_uring: do msg_ring in target task via tw")
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 56d8e318
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