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authorStefan Metzmacher <metze@samba.org>2022-08-11 09:11:15 +0200
committerJens Axboe <axboe@kernel.dk>2022-08-12 17:01:00 -0600
commitf2ccb5aed7bce1d8b3ed5b3385759a5509663028 (patch)
tree32c78d3576a1e594aab4dca3c36efb6ee5dcd93e /io_uring/msg_ring.c
parentaddebd9ac9ca0ef8b3764907bf8018e48caffc64 (diff)
io_uring: make io_kiocb_to_cmd() typesafe
We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher <metze@samba.org> Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/msg_ring.c')
-rw-r--r--io_uring/msg_ring.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/io_uring/msg_ring.c b/io_uring/msg_ring.c
index 753d16734319..976c4ba68ee7 100644
--- a/io_uring/msg_ring.c
+++ b/io_uring/msg_ring.c
@@ -26,7 +26,7 @@ struct io_msg {
static int io_msg_ring_data(struct io_kiocb *req)
{
struct io_ring_ctx *target_ctx = req->file->private_data;
- struct io_msg *msg = io_kiocb_to_cmd(req);
+ struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg);
if (msg->src_fd || msg->dst_fd || msg->flags)
return -EINVAL;
@@ -76,7 +76,7 @@ static int io_double_lock_ctx(struct io_ring_ctx *ctx,
static int io_msg_send_fd(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_ring_ctx *target_ctx = req->file->private_data;
- struct io_msg *msg = io_kiocb_to_cmd(req);
+ struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg);
struct io_ring_ctx *ctx = req->ctx;
unsigned long file_ptr;
struct file *src_file;
@@ -122,7 +122,7 @@ out_unlock:
int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
- struct io_msg *msg = io_kiocb_to_cmd(req);
+ struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg);
if (unlikely(sqe->buf_index || sqe->personality))
return -EINVAL;
@@ -141,7 +141,7 @@ int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags)
{
- struct io_msg *msg = io_kiocb_to_cmd(req);
+ struct io_msg *msg = io_kiocb_to_cmd(req, struct io_msg);
int ret;
ret = -EBADFD;