Merge tag 'audit-pr-20210629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit updates from Paul Moore:
 "Another merge window, another small audit pull request.

  Four patches in total: one is cosmetic, one removes an unnecessary
  initialization, one renames some enum values to prevent name
  collisions, and one converts list_del()/list_add() to list_move().

  None of these are earth shattering and all pass the audit-testsuite
  tests while merging cleanly on top of your tree from earlier today"

* tag 'audit-pr-20210629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: remove unnecessary 'ret' initialization
  audit: remove trailing spaces and tabs
  audit: Use list_move instead of list_del/list_add
  audit: Rename enum audit_state constants to avoid AUDIT_DISABLED redefinition
  audit: add blank line after variable declarations

include/uapi/linux/audit.h

@@ -48,7 +48,7 @@
  * 2500 - 2999 future user space (maybe integrity labels and related events)
  *
  * Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
- * exclusively user space. 1300-2099 is kernel --> user space 
+ * exclusively user space. 1300-2099 is kernel --> user space
  * communication.
  */
 #define AUDIT_GET		1000	/* Get status */
@@ -78,7 +78,7 @@
 #define AUDIT_LAST_USER_MSG	1199
 #define AUDIT_FIRST_USER_MSG2	2100	/* More user space messages */
 #define AUDIT_LAST_USER_MSG2	2999
- 
+
 #define AUDIT_DAEMON_START      1200    /* Daemon startup record */
 #define AUDIT_DAEMON_END        1201    /* Daemon normal stop record */
 #define AUDIT_DAEMON_ABORT      1202    /* Daemon error stop record */

kernel/audit.h

 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/* audit -- definition of audit_context structure and supporting types 
+/* audit -- definition of audit_context structure and supporting types
  *
  * Copyright 2003-2004 Red Hat, Inc.
  * Copyright 2005 Hewlett-Packard Development Company, L.P.
@@ -21,16 +21,16 @@
    a per-task filter.  At syscall entry, the audit_state is augmented by
    the syscall filter. */
 enum audit_state {
-	AUDIT_DISABLED,		/* Do not create per-task audit_context.
+	AUDIT_STATE_DISABLED,	/* Do not create per-task audit_context.
 				 * No syscall-specific audit records can
 				 * be generated. */
-	AUDIT_BUILD_CONTEXT,	/* Create the per-task audit_context,
+	AUDIT_STATE_BUILD,	/* Create the per-task audit_context,
 				 * and fill it in at syscall
 				 * entry time.  This makes a full
 				 * syscall record available if some
 				 * other part of the kernel decides it
 				 * should be recorded. */
-	AUDIT_RECORD_CONTEXT	/* Create the per-task audit_context,
+	AUDIT_STATE_RECORD	/* Create the per-task audit_context,
 				 * always fill it in at syscall entry
 				 * time, and always write out the audit
 				 * record at syscall exit time.  */
@@ -322,7 +322,7 @@ static inline int audit_signal_info_syscall(struct task_struct *t)
 	return 0;
 }
 
-#define audit_filter_inodes(t, c) AUDIT_DISABLED
+#define audit_filter_inodes(t, c) AUDIT_STATE_DISABLED
 #endif /* CONFIG_AUDITSYSCALL */
 
 extern char *audit_unpack_string(void **bufp, size_t *remain, size_t len);

kernel/audit_tree.c

@@ -689,8 +689,7 @@ void audit_trim_trees(void)
 
 		tree = container_of(cursor.next, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&cursor);
-		list_add(&cursor, &tree->list);
+		list_move(&cursor, &tree->list);
 		mutex_unlock(&audit_filter_mutex);
 
 		err = kern_path(tree->pathname, 0, &path);
@@ -899,8 +898,7 @@ int audit_tag_tree(char *old, char *new)
 
 		tree = container_of(cursor.next, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&cursor);
-		list_add(&cursor, &tree->list);
+		list_move(&cursor, &tree->list);
 		mutex_unlock(&audit_filter_mutex);
 
 		err = kern_path(tree->pathname, 0, &path2);
@@ -925,8 +923,7 @@ int audit_tag_tree(char *old, char *new)
 		mutex_lock(&audit_filter_mutex);
 		spin_lock(&hash_lock);
 		if (!tree->goner) {
-			list_del(&tree->list);
-			list_add(&tree->list, &tree_list);
+			list_move(&tree->list, &tree_list);
 		}
 		spin_unlock(&hash_lock);
 		put_tree(tree);
@@ -937,8 +934,7 @@ int audit_tag_tree(char *old, char *new)
 
 		tree = container_of(barrier.prev, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&tree->list);
-		list_add(&tree->list, &barrier);
+		list_move(&tree->list, &barrier);
 		mutex_unlock(&audit_filter_mutex);
 
 		if (!failed) {

security/lsm_audit.c

@@ -119,7 +119,6 @@ int ipv6_skb_to_auditdata(struct sk_buff *skb,
 		return -EINVAL;
 	ad->u.net->v6info.saddr = ip6->saddr;
 	ad->u.net->v6info.daddr = ip6->daddr;
-	ret = 0;
 	/* IPv6 can have several extension header before the Transport header
 	 * skip them */
 	offset = skb_network_offset(skb);