1 files changed, 10 insertions, 1 deletions

diff --git a/src/firejail/main.c b/src/firejail/main.c
index 089d80a68..d46a56627 100644
--- a/src/firejail/main.c
+++ b/src/firejail/main.c
@@ -961,7 +961,7 @@ void filter_add_blacklist_override(int fd, int syscall, int arg, void *ptrarg, b
 static int check_postexec(const char *list) {
         char *prelist, *postlist;
 
-        if (list) {
+        if (list && list[0]) {
                 syscalls_in_list(list, "@default-keep", -1, &prelist, &postlist, true);
                 if (postlist)
                         return 1;
@@ -2855,6 +2855,15 @@ int main(int argc, char **argv, char **envp) {
         // check network configuration options - it will exit if anything went wrong
         net_check_cfg();
 
+        // customization of default seccomp filter
+        if (config_seccomp_filter_add) {
+                if (arg_seccomp && !cfg.seccomp_list_keep && !cfg.seccomp_list_drop)
+                        profile_list_augment(&cfg.seccomp_list, config_seccomp_filter_add);
+
+                if (arg_seccomp32 && !cfg.seccomp_list_keep32 && !cfg.seccomp_list_drop32)
+                        profile_list_augment(&cfg.seccomp_list32, config_seccomp_filter_add);
+        }
+
         if (arg_seccomp)
                 arg_seccomp_postexec = check_postexec(cfg.seccomp_list) || check_postexec(cfg.seccomp_list_drop);