diff options
| author | Jens Axboe <axboe@kernel.dk> | 2026-01-21 21:48:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-27 01:59:00 +0300 |
| commit | d733106e7c652d5fc3d497e9ee74456476b905d3 (patch) | |
| tree | 49b8848f5823666e246130240e38c04f191540ac /io_uring/sync.c | |
| parent | 1d126db2f263f2ce3968203ecb06faf1ea8a5007 (diff) | |
| download | linux-d733106e7c652d5fc3d497e9ee74456476b905d3.tar.xz | |
io_uring/sync: validate passed in offset
[ Upstream commit 649dd18f559891bdafc5532d737c7dfb56060a6d ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'io_uring/sync.c')
| -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; |