diff -urNp -x '*.orig' apparmor-3.0.1.org/parser/parser_main.c apparmor-3.0.1/parser/parser_main.c
--- apparmor-3.0.1.org/parser/parser_main.c	2020-12-02 12:01:37.000000000 +0100
+++ apparmor-3.0.1/parser/parser_main.c	2021-04-01 22:28:09.569591753 +0200
@@ -1102,6 +1102,8 @@ int process_profile(int option, aa_kerne
 		skip_cache = 1;
 
 	if (cachename) {
+		cache_tstamp_final_check();
+
 		/* Load a binary cache if it exists and is newest */
 		if (cache_hit(cachename)) {
 			retval = process_binary(option, kernel_interface,
diff -urNp -x '*.orig' apparmor-3.0.1.org/parser/policy_cache.c apparmor-3.0.1/parser/policy_cache.c
--- apparmor-3.0.1.org/parser/policy_cache.c	2020-12-02 12:01:37.000000000 +0100
+++ apparmor-3.0.1/parser/policy_cache.c	2021-04-01 22:28:09.569591753 +0200
@@ -75,6 +75,14 @@ void set_cache_tstamp(struct timespec t)
 	cache_tstamp = t;
 }
 
+void cache_tstamp_final_check(void)
+{
+	if (tstamp_cmp(cache_tstamp, mru_policy_tstamp) != 0) {
+		pwarn(WARN_DEBUG_CACHE, "%s: cache mtime is different than policy files mtimes\n", progname);
+		mru_skip_cache = 1;
+	}
+}
+
 void update_mru_tstamp(FILE *file, const char *name)
 {
 	struct stat stat_file;
diff -urNp -x '*.orig' apparmor-3.0.1.org/parser/policy_cache.h apparmor-3.0.1/parser/policy_cache.h
--- apparmor-3.0.1.org/parser/policy_cache.h	2020-12-02 12:01:37.000000000 +0100
+++ apparmor-3.0.1/parser/policy_cache.h	2021-04-01 22:28:09.569591753 +0200
@@ -38,6 +38,7 @@ extern int create_cache_dir;		/* create
 extern int mru_skip_cache;
 
 void set_cache_tstamp(struct timespec t);
+void cache_tstamp_final_check(void);
 void update_mru_tstamp(FILE *file, const char *path);
 bool valid_cached_file_version(const char *cachename);
 char *cache_filename(aa_policy_cache *pc, int dir, const char *basename);