1 files changed, 34 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-devtools/json-c/json-c/0002-Prevent-division-by-zero-in-linkhash.patch b/meta-openbmc-mods/meta-common/recipes-devtools/json-c/json-c/0002-Prevent-division-by-zero-in-linkhash.patch
new file mode 100644
index 000000000..447dfe776
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-devtools/json-c/json-c/0002-Prevent-division-by-zero-in-linkhash.patch
@@ -0,0 +1,34 @@
+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] 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(+)
+
+diff --git a/linkhash.c b/linkhash.c
+index 7ea58c0abf..f05cc38030 100644
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -12,6 +12,7 @@
+ 
+ #include "config.h"
+ 
++#include <assert.h>
+ #include <stdio.h>
+ #include <string.h>
+ #include <stdlib.h>
+@@ -499,6 +500,8 @@ struct lh_table *lh_table_new(int size, lh_entry_free_fn *free_fn, lh_hash_fn *h
+ 	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)
+ 		return NULL;