apparmor: Fix incorrect profile->signal range check

The check on profile->signal is always false, the value can never be
less than 1 *and* greater than MAXMAPPED_SIG. Fix this by replacing
the logical operator && with ||.

Fixes: 84c455d ("apparmor: add support for profiles to define the kill signal")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Author: ColinIanKing

security/apparmor/policy_unpack.c

@@ -919,7 +919,7 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
 
 	/* optional */
 	(void) aa_unpack_u32(e, &profile->signal, "kill");
-	if (profile->signal < 1 && profile->signal > MAXMAPPED_SIG) {
+	if (profile->signal < 1 || profile->signal > MAXMAPPED_SIG) {
 		info = "profile kill.signal invalid value";
 		goto fail;
 	}