From: Jens Axboe axboe@kernel.dk
[ Upstream commit 5a1e99b61b0c81388cde0c808b3e4173907df19f ]
We should check unused fields for non-zero and -EINVAL if they are set, making it consistent with other opcodes.
Fixes: aa1fa28fc73e ("io_uring: add support for recvmsg()") 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 48c9a550e48c..7aad4bde92e9 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5009,6 +5009,8 @@ static int io_recvmsg_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);