Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git…

…/viro/vfs Pull vfs mount fix from Al Viro: "Fix for umount -l/mount --move race caught by syzbot yesterday..." * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: do_move_mount(): fix an unsafe use of is_anon_ns()
mariux64 · May 10, 2019 · 8ea5b2a · 8ea5b2a
2 parents 601e6bc + 05883ee
commit 8ea5b2a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/namespace.c b/fs/namespace.c
@@ -2599,7 +2599,7 @@ static int do_move_mount(struct path *old_path, struct path *new_path)
 	if (attached && !check_mnt(old))
 		goto out;
 
-	if (!attached && !is_anon_ns(ns))
+	if (!attached && !(ns && is_anon_ns(ns)))
 		goto out;
 
 	if (old->mnt.mnt_flags & MNT_LOCKED)