sys/net/grnc/netreg: avoid creating an infinite loop

RIOT-OS · Feb 2, 2023 · b7a5261 · b7a5261
1 parent 7d1ef9d
commit b7a5261
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/sys/net/gnrc/netreg/gnrc_netreg.c b/sys/net/gnrc/netreg/gnrc_netreg.c
@@ -152,6 +152,13 @@ int gnrc_netreg_register(gnrc_nettype_t type, gnrc_netreg_entry_t *entry)
     }
 
     _gnrc_netreg_acquire_exclusive();
+
+    /* don't add the same entry twice */
+    gnrc_netreg_entry_t *e;
+    LL_FOREACH(netreg[type], e) {
+        assert(entry != e);
+    }
+
     LL_PREPEND(netreg[type], entry);
     _gnrc_netreg_release_exclusive();