Don't allow acls which contain unmapped identifiers: they are meaningful
for remote file systems only.
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
---
fs/ext4/richacl.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/richacl.c b/fs/ext4/richacl.c
index 83b7a95..4ef140e 100644
--- a/fs/ext4/richacl.c
+++ b/fs/ext4/richacl.c
@@ -63,8 +63,13 @@ __ext4_set_richacl(handle_t *handle, struct inode *inode, struct richacl *acl)
int retval;
if (acl) {
- mode_t mode = inode->i_mode;
+ mode_t mode;
+ /* Don't allow acls with unmapped identifiers. */
+ if (richacl_has_unmapped_identifiers(acl))
+ return -EINVAL;
+
+ mode = inode->i_mode;
if (richacl_equiv_mode(acl, &mode) == 0) {
inode->i_mode = mode;
ext4_mark_inode_dirty(handle, inode);
--
2.5.0
--
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