package/libs/libjson-c/patches/001-Prevent-division-by-zero-in-linkhash.patch

   1 From 77d935b7ae7871a1940cd827e850e6063044ec45 Mon Sep 17 00:00:00 2001
   2 From: Tobias Stoeckmann <tobias@stoeckmann.org>
   3 Date: Mon, 4 May 2020 19:46:45 +0200
   4 Subject: [PATCH 2/2] Prevent division by zero in linkhash.
   5
   6 If a linkhash with a size of zero is created, then modulo operations
   7 are prone to division by zero operations.
   8
   9 Purely protective measure against bad usage.
  10 ---
  11  linkhash.c | 3 +++
  12  1 file changed, 3 insertions(+)
  13
  14 --- a/linkhash.c
  15 +++ b/linkhash.c
  16 @@ -10,6 +10,7 @@
  17   *
  18   */
  19
  20 +#include <assert.h>
  21  #include <stdio.h>
  22  #include <string.h>
  23  #include <stdlib.h>
  24 @@ -431,6 +432,8 @@ struct lh_table* lh_table_new(int size,
  25         int i;
  26         struct lh_table *t;
  27
  28 +  /* Allocate space for elements to avoid divisions by zero. */
  29 +  assert(size > 0);
  30         t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
  31         if(!t) lh_abort("lh_table_new: calloc failed\n");
  32         t->count = 0;