[PATCH] ext4: check the acl's validity before setting

[ZhangZhen <zhenzhang.zhang@huawei.com>]

Before setting the acl, call posix_acl_valid() to check if it is
valid or not.

Signed-off-by: zhang zhen <zhenzhang.zhang@huawei.com>
---
 fs/ext4/acl.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index d40c8db..97f7650 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -197,6 +197,12 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 	size_t size = 0;
 	int error;

+	if (acl) {
+		error = posix_acl_valid(acl);
+		if (error < 0)
+			return error;
+	}
+
 	switch (type) {
 	case ACL_TYPE_ACCESS:
 		name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
-- 
1.6.0.2