6.6-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Begunkov asml.silence@gmail.com
commit 4fe82aedeb8a8cb09bfa60f55ab57b5c10a74ac4 upstream.
cac9e4418f4cb ("io_uring/net: save msghdr->msg_control for retries") reinstatiates msg_control before every __sys_sendmsg_sock(), since the function can overwrite the value in msghdr. We need to do same for zerocopy sendmsg.
Cc: stable@vger.kernel.org Fixes: 493108d95f146 ("io_uring/net: zerocopy sendmsg") Link: https://github.com/axboe/liburing/issues/1067 Signed-off-by: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/cc1d5d9df0576fa66ddad4420d240a98a020b267.171259617... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- io_uring/net.c | 1 + 1 file changed, 1 insertion(+)
--- a/io_uring/net.c +++ b/io_uring/net.c @@ -1274,6 +1274,7 @@ int io_sendmsg_zc(struct io_kiocb *req,
if (req_has_async_data(req)) { kmsg = req->async_data; + kmsg->msg.msg_control_user = sr->msg_control; } else { ret = io_sendmsg_copy_hdr(req, &iomsg); if (ret)