diff options
| author | Dylan Yudaken <dylany@fb.com> | 2022-04-12 19:30:40 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-04-12 19:46:54 +0300 |
| commit | d8a3ba9c143bf89c032deced8a686ffa53b46098 (patch) | |
| tree | a27ecd001fffc8a6557e56f09c5167cbad545670 /fs/io_uring.c | |
| parent | 565c5e616e8061b40a2e1d786c418a7ac3503a8d (diff) | |
| download | linux-d8a3ba9c143bf89c032deced8a686ffa53b46098.tar.xz | |
io_uring: verify that resv2 is 0 in io_uring_rsrc_update2
Verify that the user does not pass in anything but 0 for this field.
Fixes: 992da01aa932 ("io_uring: change registration/upd/rsrc tagging ABI")
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220412163042.2788062-3-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 58bfa71fe3b6..e899192ffb77 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -6839,6 +6839,7 @@ static int io_files_update(struct io_kiocb *req, unsigned int issue_flags) up.nr = 0; up.tags = 0; up.resv = 0; + up.resv2 = 0; io_ring_submit_lock(ctx, needs_lock); ret = __io_register_rsrc_update(ctx, IORING_RSRC_FILE, @@ -11423,7 +11424,7 @@ static int io_register_files_update(struct io_ring_ctx *ctx, void __user *arg, memset(&up, 0, sizeof(up)); if (copy_from_user(&up, arg, sizeof(struct io_uring_rsrc_update))) return -EFAULT; - if (up.resv) + if (up.resv || up.resv2) return -EINVAL; return __io_register_rsrc_update(ctx, IORING_RSRC_FILE, &up, nr_args); } @@ -11437,7 +11438,7 @@ static int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg, return -EINVAL; if (copy_from_user(&up, arg, sizeof(up))) return -EFAULT; - if (!up.nr || up.resv) + if (!up.nr || up.resv || up.resv2) return -EINVAL; return __io_register_rsrc_update(ctx, type, &up, up.nr); } |