On Mon, 2023-03-06 at 10:22 -0500, Stefan Berger wrote:

On 3/3/23 13:18, Roberto Sassu wrote:

quoted

From: Roberto Sassu <roberto.sassu@huawei.com>

In preparation for moving IMA and EVM to the LSM infrastructure, introduce
the inode_post_remove_acl hook.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
  
+/**
+ * security_inode_post_remove_acl() - Update inode sec after remove_acl op
+ * @idmap: idmap of the mount
+ * @dentry: file
+ * @acl_name: acl name
+ *
+ * Update inode security field after successful remove_acl operation on @dentry
+ * in @idmap. The posix acls are identified by @acl_name.
+ */
+void security_inode_post_remove_acl(struct mnt_idmap *idmap,
+				    struct dentry *dentry, const char *acl_name)
+{
+	if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
+		return;

Was that a mistake before that EVM and IMA functions did not filtered out private inodes?

Looks like that. At least for hooks that are not called from
security.c.

Thanks

Roberto