blob: 5345328d7c585dfdbe6d4e94c1c99d54202d53b7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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;
|
