rr_decode: Ensure we have at least a byte of data to read from

videolabs · Mar 19, 2020 · dcfdc23 · dcfdc23
1 parent 162de97
commit dcfdc23
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/rr.c b/src/rr.c
@@ -300,6 +300,9 @@ rr_decode(const uint8_t *ptr, size_t *n, const uint8_t *root, char **ss, uint8_t
         if (nb_rec > 16)
                 return (NULL);
 
+        if (*n == 0)
+                return (NULL);
+
         s = *ss = malloc(MDNS_DN_MAXSZ);
         if (!s)
                 return (NULL);