Add two acl pointer checks before this function.
---
Signed-off-by: Liuwenyi <qingshenlwy@xxxxxxxxx>
CC: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 39df95a..0d2a7a2 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -150,6 +150,12 @@ posix_acl_equiv_mode(const struct posix_acl *acl,
mode_t *mode_p)
mode_t mode = 0;
int not_equiv = 0;
+ if (!acl)
+ return -EINVAL;
+
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+
FOREACH_ACL_ENTRY(pa, acl, pe) {
switch (pa->e_tag) {
case ACL_USER_OBJ:
--
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