1 files changed, 32 insertions, 0 deletions
diff --git a/package/libs/libjson-c/patches/001-Prevent-division-by-zero-in-linkhash.patch b/package/libs/libjson-c/patches/001-Prevent-division-by-zero-in-linkhash.patch
new file mode 100644
index 0000000000..5345328d7c
--- /dev/null
+++ b/package/libs/libjson-c/patches/001-Prevent-division-by-zero-in-linkhash.patch
@@ -0,0 +1,32 @@
+From 77d935b7ae7871a1940cd827e850e6063044ec45 Mon Sep 17 00:00:00 2001
+From: Tobias Stoeckmann <tobias@stoeckmann.org>
+Date: Mon, 4 May 2020 19:46:45 +0200
+Subject: [PATCH 2/2] Prevent division by zero in linkhash.
+
+If a linkhash with a size of zero is created, then modulo operations
+are prone to division by zero operations.
+
+Purely protective measure against bad usage.
+---
+ linkhash.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -10,6 +10,7 @@
+  *
+  */
+ 
++#include <assert.h>
+ #include <stdio.h>
+ #include <string.h>
+ #include <stdlib.h>
+@@ -431,6 +432,8 @@ struct lh_table* lh_table_new(int size,
+ 	int i;
+ 	struct lh_table *t;
+ 
++  /* Allocate space for elements to avoid divisions by zero. */
++  assert(size > 0);
+ 	t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
+ 	if(!t) lh_abort("lh_table_new: calloc failed\n");
+ 	t->count = 0;