mnt: If fs_fully_visible fails call put_filesystem.

[ Upstream commit 97c1df3 ] Add this trivial missing error handling. Cc: stable@vger.kernel.org Fixes: 1b852bc ("mnt: Refactor the logic for mounting sysfs and proc in a user namespace") Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
mariux64 · Jun 17, 2016 · fced2a8 · fced2a8
1 parent eb1eba6
commit fced2a8
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/fs/namespace.c b/fs/namespace.c
@@ -2390,8 +2390,10 @@ static int do_new_mount(struct path *path, const char *fstype, int flags,
 			mnt_flags |= MNT_NODEV | MNT_LOCK_NODEV;
 		}
 		if (type->fs_flags & FS_USERNS_VISIBLE) {
-			if (!fs_fully_visible(type, &mnt_flags))
+			if (!fs_fully_visible(type, &mnt_flags)) {
+				put_filesystem(type);
 				return -EPERM;
+			}
 		}
 	}