Pavel Begunkov 0b8c0e7c96 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>
2021-04-26 09:03:57 -06:00
..
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-04-11 11:53:36 -07:00
2021-03-24 10:22:00 -07:00
2021-02-23 13:39:45 -08:00
2021-04-07 21:30:27 -05:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-03-13 12:26:22 -08:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-04-03 12:15:01 -07:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-02-23 13:39:45 -08:00
2021-03-05 17:21:25 -08:00
2021-02-24 13:38:26 -08:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2020-09-10 14:03:31 -07:00
2021-01-24 14:27:20 +01:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:20 +01:00
2021-01-24 14:27:20 +01:00
2021-02-26 09:41:05 -08:00
2021-02-24 13:38:26 -08:00
2021-02-24 13:38:26 -08:00
2021-02-23 13:39:45 -08:00
2021-01-24 14:27:19 +01:00
2021-02-23 13:39:45 -08:00
2021-04-26 09:03:57 -06:00
2020-07-31 08:16:01 +02:00
2021-02-23 13:39:45 -08:00
2021-01-29 10:06:46 +05:30
2021-02-23 13:39:45 -08:00
2021-02-24 13:38:26 -08:00
2021-01-24 14:27:20 +01:00
2020-07-31 08:16:00 +02:00
2021-01-24 14:27:19 +01:00
2021-01-21 14:06:00 -07:00
2021-02-21 11:02:48 -08:00
2021-01-24 14:27:20 +01:00
2021-02-13 17:17:53 +01:00
2021-01-24 14:27:18 +01:00