io_uring/zctx: check chained notif contexts

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[ Upstream commit ab3ea6eac5 ]

Send zc only links ubuf_info for requests coming from the same context.
There are some ambiguous syz reports, so let's check the assumption on
notification completion.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/fd527d8638203fe0f1c5ff06ff2e1d8fd68f831b.1755179962.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pavel Begunkov 2025-08-14 15:40:57 +01:00 • committed by Greg Kroah-Hartman

parent fd06538d8f

commit d664a3ce3a

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io_uring/notif.c

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