[PATCH 5.8] io_uring: fix missing msg_name assignment

[Pavel Begunkov <asml.silence@gmail.com>]

Ensure to set msg.msg_name for the async portion of send/recvmsg,
as the header copy will copy to/from it.

Cc: stable@vger.kernel.org # 5.5, 5.6, 5.7
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 7f2a2cb5c056..8482b9aed952 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3913,6 +3913,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	if (req->flags & REQ_F_NEED_CLEANUP)
 		return 0;
 
+	io->msg.msg.msg_name = &io->msg.addr;
 	io->msg.iov = io->msg.fast_iov;
 	ret = sendmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags,
 					&io->msg.iov);
@@ -4025,6 +4026,7 @@ static int __io_recvmsg_copy_hdr(struct io_kiocb *req, struct io_async_ctx *io)
 	size_t iov_len;
 	int ret;
 
+	io->msg.msg.msg_name = &io->msg.addr;
 	ret = __copy_msghdr_from_user(&io->msg.msg, sr->msg, &io->msg.uaddr,
 					&uiov, &iov_len);
 	if (ret)
-- 
2.24.0