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| author | Jens Axboe <axboe@kernel.dk> | 2023-10-21 20:30:29 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-10-25 15:44:14 +0200 |
| commit | 7644b1a1c9a7ae8ab99175989bfc8676055edb46 (patch) | |
| tree | dfa13e49521a00400a40c955f9f927a2e41c9af4 /LICENSES/dual | |
| parent | io_uring: fix crash with IORING_SETUP_NO_MMAP and invalid SQ ring address (diff) | |
| download | linux-7644b1a1c9a7ae8ab99175989bfc8676055edb46.tar.xz linux-7644b1a1c9a7ae8ab99175989bfc8676055edb46.zip | |
io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid
We could race with SQ thread exit, and if we do, we'll hit a NULL pointer
dereference when the thread is cleared. Grab the SQPOLL data lock before
attempting to get the task cpu and pid for fdinfo, this ensures we have a
stable view of it.
Cc: stable@vger.kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218032
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'LICENSES/dual')
0 files changed, 0 insertions, 0 deletions