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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2021-04-26 15:17:38 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-04-26 09:03:57 -0600 |
| commit | 0b8c0e7c9692cfcfa02c9052d4d53ae67901c400 (patch) | |
| tree | aecf19946187f5912d04a7156f16017b1b96f891 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | io_uring: simplify SQPOLL cancellations (diff) | |
| download | wireguard-linux-0b8c0e7c9692cfcfa02c9052d4d53ae67901c400.tar.xz wireguard-linux-0b8c0e7c9692cfcfa02c9052d4d53ae67901c400.zip | |
io_uring: fix NULL reg-buffer
io_import_fixed() doesn't expect a registered buffer slot to be NULL and
would fail stumbling on it. We don't allow it, but if during
__io_sqe_buffers_update() rsrc removal succeeds but following register
fails, we'll get such a situation.
Do it atomically and don't remove buffers until we sure that a new one
can be set.
Fixes: 634d00df5e1cf ("io_uring: add full-fledged dynamic buffers support")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/830020f9c387acddd51962a3123b5566571b8c6d.1619446608.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions