Merge pull request #1255 from Hummer12007/policy

Prevent null pointer dereferences with policy allocation failure

sway/commands.c

@@ -608,10 +608,10 @@ struct cmd_results *config_commands_command(char *exec) {
 	}
 	if (!policy) {
 		policy = alloc_command_policy(cmd);
-		if (!policy) {
+		sway_assert(policy, "Unable to allocate security policy");
-			sway_abort("Unable to allocate security policy");
+		if (policy) {
+			list_add(config->command_policies, policy);
 		}
-		list_add(config->command_policies, policy);
 	}
 	policy->context = context;
 

sway/commands/permit.c

@@ -65,11 +65,11 @@ struct cmd_results *cmd_permit(int argc, char **argv) {
 	}
 
 	struct feature_policy *policy = get_feature_policy(program);
-	if (assign_perms) {
+	if (policy && assign_perms) {
 		policy->features |= get_features(argc, argv, &error);
+		sway_log(L_DEBUG, "Permissions granted to %s for features %d",
+				policy->program, policy->features);
 	}
-	sway_log(L_DEBUG, "Permissions granted to %s for features %d",
-			policy->program, policy->features);
 
 	free(program);
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);

sway/security.c

@@ -152,10 +152,10 @@ struct feature_policy *get_feature_policy(const char *name) {
 	}
 	if (!policy) {
 		policy = alloc_feature_policy(name);
-		if (!policy) {
+		sway_assert(policy, "Unable to allocate security policy");
-			sway_abort("Unable to allocate security policy");
+		if (policy) {
+			list_add(config->feature_policies, policy);
 		}
-		list_add(config->feature_policies, policy);
 	}
 	return policy;
 }