diff options
| author | Jens Axboe <axboe@kernel.dk> | 2026-01-21 11:48:56 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-01-21 11:50:59 -0700 |
| commit | 649dd18f559891bdafc5532d737c7dfb56060a6d (patch) | |
| tree | f4c220bc899476d46fb94e76aeaaf045c193e855 | |
| parent | 07f3c3a1cd56c2048a92dad0c11f15e4ac3888c1 (diff) | |
io_uring/sync: validate passed in offset
Check if the passed in offset is negative once cast to sync->off. This
ensures that -EINVAL is returned for that case, like it would be for
sync_file_range(2).
Fixes: c992fe2925d7 ("io_uring: add fsync support")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | io_uring/sync.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/io_uring/sync.c b/io_uring/sync.c index cea2d381ffd2..ab7fa1cd7dd6 100644 --- a/io_uring/sync.c +++ b/io_uring/sync.c @@ -62,6 +62,8 @@ int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return -EINVAL; sync->off = READ_ONCE(sqe->off); + if (sync->off < 0) + return -EINVAL; sync->len = READ_ONCE(sqe->len); req->flags |= REQ_F_FORCE_ASYNC; return 0; |