29 lines
962 B
Diff
29 lines
962 B
Diff
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From bb5eec59e3ec66f6dccb79b1900aa806a1cca12e Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Chv=C3=A1tal?= <tchvatal@suse.com>
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Date: Fri, 8 Dec 2017 14:59:08 +0100
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Subject: [PATCH] Do not try to store negative values in unsigned int
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---
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deflate.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/deflate.c b/deflate.c
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index 1ec7614..1bad1eb 100644
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--- a/deflate.c
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+++ b/deflate.c
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@@ -1536,7 +1536,10 @@ local void fill_window(s)
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/* Initialize the hash value now that we have some input: */
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if (s->lookahead + s->insert >= MIN_MATCH) {
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- uInt str = s->strstart - s->insert;
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+ uInt str = 0;
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+ /* storing negative values to uInt is not good idea */
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+ if (s->strstart - s->insert > 0)
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+ str = s->strstart - s->insert;
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s->ins_h = s->window[str];
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UPDATE_HASH(s, s->ins_h, s->window[str + 1]);
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#if MIN_MATCH != 3
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--
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2.15.1
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