IdrisKalp
31 lines
1.0 KiB
Diff
31 lines
1.0 KiB
Diff
From 13ca8fee0c897121ae79ae644a212418398dfea7 Mon Sep 17 00:00:00 2001
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From: Amin Hassani <ahassani@chromium.org>
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Date: Fri, 8 Mar 2019 09:58:20 -0800
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Subject: [PATCH] Check for upper bounds of nselectors.
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Currently there is no check for the upper bounds of the
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nselectors. Hence, a corrupt input can cause a segfault.
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This issue was discovered by one of our fuzzers. The actual error was:
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../bzip2-1.0.6/decompress.c:299:10: runtime error: index 18002 out of bounds for type 'UChar [18002]'
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---
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decompress.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/decompress.c b/decompress.c
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index 311f566..391552d 100644
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--- a/decompress.c
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+++ b/decompress.c
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@@ -288,6 +288,7 @@ Int32 BZ2_decompress ( DState* s )
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if (nGroups < 2 || nGroups > 6) RETURN(BZ_DATA_ERROR);
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GET_BITS(BZ_X_SELECTOR_2, nSelectors, 15);
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if (nSelectors < 1) RETURN(BZ_DATA_ERROR);
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+ if (nSelectors > BZ_MAX_SELECTORS) RETURN(BZ_DATA_ERROR);
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for (i = 0; i < nSelectors; i++) {
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j = 0;
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while (True) {
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--
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2.21.0.360.g471c308f928-goog
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