24 lines
974 B
Diff
24 lines
974 B
Diff
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From 954ff2e2673cef48f0ed44668c466eab041db387 Mon Sep 17 00:00:00 2001
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From: Pavel Kopylov <pkopylov@cloudlinux.com>
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Date: Wed, 17 May 2023 11:33:45 +0200
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Subject: [PATCH] Fix an overflow which is still possible for some values.
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diff --git a/common.c b/common.c
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index 583a0ca..6d73b1b 100644
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--- a/common.c
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+++ b/common.c
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@@ -1639,9 +1639,11 @@ int parse_values(char *strargv, unsigned char bitmap[], int max_val, const char
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*/
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void check_overflow(size_t val1, size_t val2, size_t val3)
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{
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- if ((unsigned long long) val1 *
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- (unsigned long long) val2 *
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- (unsigned long long) val3 > UINT_MAX) {
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+if ((val1 != 0) && (val2 != 0) && (val3 != 0) &&
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+ (((unsigned long long)UINT_MAX / (unsigned long long)val1 <
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+ (unsigned long long)val2) ||
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+ ((unsigned long long)UINT_MAX / ((unsigned long long)val1 *
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+ (unsigned long long)val2) < (unsigned long long)val3))) {
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#ifdef DEBUG
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fprintf(stderr, "%s: Overflow detected (%llu). Aborting...\n",
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__FUNCTION__,
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