Commit deaef31b authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring/net: correctly handle multishot recvmsg retry setup 



If we loop for multishot receive on the initial attempt, and then abort
later on to wait for more, we miss a case where we should be copying the
io_async_msghdr from the stack to stable storage. This leads to the next
retry potentially failing, if the application had the msghdr on the
stack.

Cc: stable@vger.kernel.org
Fixes: 9bb66906 ("io_uring: support multishot in recvmsg")
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent b5311dbc

io_uring/net.c

+2 −1
Original line number Diff line number Diff line
@@ -931,7 +931,8 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) 
			kfree(kmsg->free_iov);

		io_netmsg_recycle(req, issue_flags);

		req->flags &= ~REQ_F_NEED_CLEANUP;

	}

	} else if (ret == -EAGAIN)

		return io_setup_async_msg(req, kmsg, issue_flags);



	return ret;

}