tomoyo: Fix pathname calculation breakage.

Commit 7177a9c4b509 ("fs: call rename2 if exists") changed
"struct inode_operations"->rename == NULL if
"struct inode_operations"->rename2 != NULL .

TOMOYO needs to check for both ->rename and ->rename2 , or
a system on (e.g.) ext4 filesystem won't boot.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index a3386d119425..bed745c8b1a3 100644
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -173,7 +173,7 @@ static char *tomoyo_get_local_path(struct dentry *dentry, char * const buffer,
                  * Use filesystem name if filesystem does not support rename()
                  * operation.
                  */
-                if (!inode->i_op->rename)
+                if (!inode->i_op->rename && !inode->i_op->rename2)
                         goto prepend_filesystem_name;
         }
         /* Prepend device name. */
@@ -282,7 +282,8 @@ char *tomoyo_realpath_from_path(struct path *path)
                  * Get local name for filesystems without rename() operation
                  * or dentry without vfsmount.
                  */
-                if (!path->mnt || !inode->i_op->rename)
+                if (!path->mnt ||
+                    (!inode->i_op->rename && !inode->i_op->rename2))
                         pos = tomoyo_get_local_path(path->dentry, buf,
                                                     buf_len - 1);
                 /* Get absolute name for the rest. */