add check for empty cidr

This causes tcprewrite to exit with an error instead of crashing. Fixes: #824
appneta · Jan 21, 2024 · 236ce27 · 236ce27
1 parent 43693c4
commit 236ce27
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/common/cidr.c b/src/common/cidr.c
@@ -249,6 +249,9 @@ parse_cidr(tcpr_cidr_t **cidrdata, char *cidrin, char *delim)
  char *network;
  char *token = NULL;
 
+ if (cidrin == NULL)
+ errx(-1, "%s", "Unable to parse empty CIDR");
+
  mask_cidr6(&cidrin, delim);
 
  /* first iteration of input using strtok */