CVE-2022-49020 net/9p: Fix a potential socket leak in p9_socket_open

In the Linux kernel, the following vulnerability has been resolved: net/9p: Fix a potential socket leak in p9socketopen Both p9fdcreatetcp and p9fdcreateunix will call p9socketopen. If the creation of p9transfd fails, p9fdcreatetcp and p9fdcreateunix will return an error directly instead of...