27 lines
870 B
Diff
27 lines
870 B
Diff
From 82df2631d7d0446b206ea6b434ea609b6c28b0e8 Mon Sep 17 00:00:00 2001
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From: Tor Andersson <tor.andersson@artifex.com>
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Date: Mon, 16 Oct 2017 13:14:25 +0200
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Subject: [PATCH] Check for integer overflow when validating new style xref
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Index.
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---
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source/pdf/pdf-xref.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/source/pdf/pdf-xref.c b/source/pdf/pdf-xref.c
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index 66bd0ed..6292793 100644
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--- a/source/pdf/pdf-xref.c
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+++ b/source/pdf/pdf-xref.c
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@@ -924,7 +924,7 @@ pdf_read_new_xref_section(fz_context *ctx, pdf_document *doc, fz_stream *stm, fz
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pdf_xref_entry *table;
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int i, n;
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- if (i0 < 0 || i1 < 0)
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+ if (i0 < 0 || i1 < 0 || (i0+i1) < 0)
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fz_throw(ctx, FZ_ERROR_GENERIC, "negative xref stream entry index");
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//if (i0 + i1 > pdf_xref_len(ctx, doc))
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// fz_throw(ctx, FZ_ERROR_GENERIC, "xref stream has too many entries");
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--
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2.9.1
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