Fixed Segmentation Fault / NULLptr dereference

Signed-off-by: Till Zimmermann <[email protected]>
eclipse · Sep 17, 2019 · 863c0ee · 863c0ee
1 parent d61c111
commit 863c0ee
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/client/client_shared.c b/client/client_shared.c
@@ -662,6 +662,10 @@ int client_config_line_proc(struct mosq_config *cfg, int pub_or_sub, int argc, c
  return 1;
  }
  topic = strchr(url, '/');
+ if(!topic){
+ fprintf(stderr, "Error: invalid URL for -L argument specified.\n\n");
+ return 1;
+ }
  *topic++ = 0;
 
  if(cfg_add_topic(cfg, pub_or_sub, topic, "-L topic"))