In the Linux kernel, the following vulnerability has been resolved: 9p: fix fid refcount leak in v9fs_vfs_get_link we check for protocol version later than required, after a fid has been obtained. Just move the version check earlier.
https://git.kernel.org/stable/c/f0126bcaee81dabc1926012126aa74caa03a4c6e
https://git.kernel.org/stable/c/e7b6d622bd812013eb39c8f4cd65b7ee8ede1e02
https://git.kernel.org/stable/c/e5690f263208c5abce7451370b7786eb25b405eb