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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-04-26 17:17:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-04-26 18:03:57 +0300 |
| commit | 0b8c0e7c9692cfcfa02c9052d4d53ae67901c400 (patch) | |
| tree | aecf19946187f5912d04a7156f16017b1b96f891 /fs/fscache | |
| parent | 9f59a9d88d3bb2708d08e0e1d03899c469c27190 (diff) | |
| download | linux-0b8c0e7c9692cfcfa02c9052d4d53ae67901c400.tar.xz | |
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 'fs/fscache')
0 files changed, 0 insertions, 0 deletions