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mount: handle NULL values in mnt_ns_release()

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

Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christian Brauner
2025-09-29 11:41:16 +02:00
committed by Linus Torvalds
parent b7ce6fa90f
commit 6c7ca6a02f
1 changed files with 1 additions and 1 deletions
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2
fs/namespace.c
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@@ -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);