Merge tag 'lsm-pr-20240923' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/pcmoore/lsm

Pull LSM fixes from Paul Moore:

 - Add a missing security_mmap_file() check to the remap_file_pages()
   syscall

 - Properly reference the SELinux and Smack LSM blobs in the
   security_watch_key() LSM hook

 - Fix a random IPE selftest crash caused by a missing list terminator
   in the test

* tag 'lsm-pr-20240923' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
  ipe: Add missing terminator to list of unit tests
  selinux,smack: properly reference the LSM blob in security_watch_key()
  mm: call the security_mmap_file() LSM hook in remap_file_pages()

mm/mmap.c

@@ -1689,8 +1689,12 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
 		flags |= MAP_LOCKED;
 
 	file = get_file(vma->vm_file);
+	ret = security_mmap_file(vma->vm_file, prot, flags);
+	if (ret)
+		goto out_fput;
 	ret = do_mmap(vma->vm_file, start, size,
 			prot, flags, 0, pgoff, &populate, NULL);
+out_fput:
 	fput(file);
 out:
 	mmap_write_unlock(mm);

security/ipe/policy_tests.c

@@ -286,6 +286,7 @@ static void ipe_parser_widestring_test(struct kunit *test)
 static struct kunit_case ipe_parser_test_cases[] = {
 	KUNIT_CASE_PARAM(ipe_parser_unsigned_test, ipe_policies_gen_params),
 	KUNIT_CASE(ipe_parser_widestring_test),
+	{ }
 };
 
 static struct kunit_suite ipe_parser_test_suite = {

security/selinux/hooks.c

@@ -6735,7 +6735,7 @@ static int selinux_key_getsecurity(struct key *key, char **_buffer)
 #ifdef CONFIG_KEY_NOTIFICATIONS
 static int selinux_watch_key(struct key *key)
 {
-	struct key_security_struct *ksec = key->security;
+	struct key_security_struct *ksec = selinux_key(key);
 	u32 sid = current_sid();
 
 	return avc_has_perm(sid, ksec->sid, SECCLASS_KEY, KEY__VIEW, NULL);

security/smack/smack_lsm.c

@@ -4629,16 +4629,9 @@ static int smack_watch_key(struct key *key)
 {
 	struct smk_audit_info ad;
 	struct smack_known *tkp = smk_of_current();
+	struct smack_known **blob = smack_key(key);
 	int rc;
 
-	if (key == NULL)
-		return -EINVAL;
-	/*
-	 * If the key hasn't been initialized give it access so that
-	 * it may do so.
-	 */
-	if (key->security == NULL)
-		return 0;
 	/*
 	 * This should not occur
 	 */
@@ -4653,8 +4646,8 @@ static int smack_watch_key(struct key *key)
 	ad.a.u.key_struct.key = key->serial;
 	ad.a.u.key_struct.key_desc = key->description;
 #endif
-	rc = smk_access(tkp, key->security, MAY_READ, &ad);
-	rc = smk_bu_note("key watch", tkp, key->security, MAY_READ, rc);
+	rc = smk_access(tkp, *blob, MAY_READ, &ad);
+	rc = smk_bu_note("key watch", tkp, *blob, MAY_READ, rc);
 	return rc;
 }
 #endif /* CONFIG_KEY_NOTIFICATIONS */