From: Jens Axboe axboe@kernel.dk
[ Upstream commit 588faa1ea5eecb351100ee5d187b9be99210f70d ]
We should check unused fields for non-zero and -EINVAL if they are set, making it consistent with other opcodes.
Fixes: 0fa03c624d8f ("io_uring: add support for sendmsg()") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/io_uring.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 1bf1ea2cd8b0..48c9a550e48c 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4786,6 +4786,8 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; + if (unlikely(sqe->addr2 || sqe->file_index)) + return -EINVAL;
sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); sr->len = READ_ONCE(sqe->len);