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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/rsrc.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/rsrc.c')
-rw-r--r--io_uring/rsrc.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 59704b9ac537..71359a4d0bd4 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -657,7 +657,7 @@ __cold int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
int io_rsrc_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
- struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+ struct io_rsrc_update *up = io_kiocb_to_cmd(req, struct io_rsrc_update);
if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
return -EINVAL;
@@ -676,7 +676,7 @@ int io_rsrc_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
static int io_files_update_with_index_alloc(struct io_kiocb *req,
unsigned int issue_flags)
{
- struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+ struct io_rsrc_update *up = io_kiocb_to_cmd(req, struct io_rsrc_update);
__s32 __user *fds = u64_to_user_ptr(up->arg);
unsigned int done;
struct file *file;
@@ -714,7 +714,7 @@ static int io_files_update_with_index_alloc(struct io_kiocb *req,
static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
{
- struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+ struct io_rsrc_update *up = io_kiocb_to_cmd(req, struct io_rsrc_update);
struct io_ring_ctx *ctx = req->ctx;
struct io_uring_rsrc_update2 up2;
int ret;
@@ -743,7 +743,7 @@ static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
static int io_notif_update(struct io_kiocb *req, unsigned int issue_flags)
{
- struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+ struct io_rsrc_update *up = io_kiocb_to_cmd(req, struct io_rsrc_update);
struct io_ring_ctx *ctx = req->ctx;
unsigned len = up->nr_args;
unsigned idx_end, idx = up->offset;
@@ -778,7 +778,7 @@ out:
int io_rsrc_update(struct io_kiocb *req, unsigned int issue_flags)
{
- struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+ struct io_rsrc_update *up = io_kiocb_to_cmd(req, struct io_rsrc_update);
switch (up->type) {
case IORING_RSRC_UPDATE_FILES: