TOMOYO: Don't add / for allow_unmount permission check.

"mount --bind /path/to/file1 /path/to/file2" is legal. Therefore,
"umount /path/to/file2" is also legal. Do not automatically append trailing '/'
if pathname to be unmounted does not end with '/'.
Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: NJames Morris <jmorris@namei.org>

security/tomoyo/file.c

@@ -1011,7 +1011,6 @@ int tomoyo_path_perm(const u8 operation, struct path *path)
 		break;
 	case TOMOYO_TYPE_RMDIR:
 	case TOMOYO_TYPE_CHROOT:
-	case TOMOYO_TYPE_UMOUNT:
 		tomoyo_add_slash(&buf);
 		break;
 	}