Commit 6c7ca6a0 authored by Christian Brauner's avatar Christian Brauner Committed by Linus Torvalds
Browse files

mount: handle NULL values in mnt_ns_release() 



When calling in listmount() mnt_ns_release() may be passed a NULL
pointer. Handle that case gracefully.

Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b7ce6fa9

fs/namespace.c

+1 −1
Original line number Diff line number Diff line
@@ -180,7 +180,7 @@ static void mnt_ns_tree_add(struct mnt_namespace *ns) 
static void mnt_ns_release(struct mnt_namespace *ns)

{

	/* keep alive for {list,stat}mount() */

	if (refcount_dec_and_test(&ns->passive)) {

	if (ns && refcount_dec_and_test(&ns->passive)) {

		fsnotify_mntns_delete(ns);

		put_user_ns(ns->user_ns);

		kfree(ns);