io_uring/msg: initialise msg request opcode

[ Upstream commit 9cc0bbdaba2a66ad90bc6ce45163b7745baffe98 ]

It's risky to have msg request opcode set to garbage, so at least
initialise it to nop. Later we might want to add a user inaccessible
opcode for such cases.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9afe650fcb348414a4529d89f52eb8969ba06efd.1743190078.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/io_uring/msg_ring.c b/io_uring/msg_ring.c
index 7e6f68e911f10cdec35cc8b0ca49e569fbdd7856..f844ab24cda42b583ba3dd2c4e3cbdbf4bdf015a 100644 (file)
--- a/io_uring/msg_ring.c
+++ b/io_uring/msg_ring.c
@@ -93,6 +93,7 @@ static int io_msg_remote_post(struct io_ring_ctx *ctx, struct io_kiocb *req,
                kmem_cache_free(req_cachep, req);
                return -EOWNERDEAD;
        }
+       req->opcode = IORING_OP_NOP;
        req->cqe.user_data = user_data;
        io_req_set_res(req, res, cflags);
        percpu_ref_get(&ctx->refs);