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https://github.com/openwrt/openwrt.git
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33 lines
884 B
Diff
33 lines
884 B
Diff
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From 77d935b7ae7871a1940cd827e850e6063044ec45 Mon Sep 17 00:00:00 2001
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From: Tobias Stoeckmann <tobias@stoeckmann.org>
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Date: Mon, 4 May 2020 19:46:45 +0200
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Subject: [PATCH 2/2] Prevent division by zero in linkhash.
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If a linkhash with a size of zero is created, then modulo operations
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are prone to division by zero operations.
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Purely protective measure against bad usage.
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---
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linkhash.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/linkhash.c
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+++ b/linkhash.c
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@@ -10,6 +10,7 @@
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*
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*/
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+#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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@@ -431,6 +432,8 @@ struct lh_table* lh_table_new(int size,
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int i;
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struct lh_table *t;
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+ /* Allocate space for elements to avoid divisions by zero. */
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+ assert(size > 0);
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t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
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if(!t) lh_abort("lh_table_new: calloc failed\n");
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t->count = 0;
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