30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
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From d8efdc261ea40e3b3af82ed1d9bc7bcdafa36d67 Mon Sep 17 00:00:00 2001
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From: Albert Astals Cid @tsdgeos
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Date: Tue, 6 Sep 2022 14:35:28 +0800
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Subject: [PATCH] JBIG2Stream: Fix crash on broken file
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---
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poppler/JBIG2Stream.cc | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/poppler/JBIG2Stream.cc b/poppler/JBIG2Stream.cc
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index 9eddaa6..cb5cf2c 100644
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--- a/poppler/JBIG2Stream.cc
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+++ b/poppler/JBIG2Stream.cc
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@@ -1968,7 +1968,11 @@ void JBIG2Stream::readTextRegionSeg(unsigned int segNum, bool imm, bool lossless
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for (i = 0; i < nRefSegs; ++i) {
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if ((seg = findSegment(refSegs[i]))) {
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if (seg->getType() == jbig2SegSymbolDict) {
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- numSyms += ((JBIG2SymbolDict *)seg)->getSize();
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+ const unsigned int segSize = ((JBIG2SymbolDict *)seg)->getSize();
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+ if (unlikely(checkedAdd(numSyms, segSize, &numSyms))) {
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+ error(errSyntaxError, getPos(), "Too many symbols in JBIG2 text region");
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+ return;
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+ }
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} else if (seg->getType() == jbig2SegCodeTable) {
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codeTables.push_back(seg);
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}
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--
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2.33.0
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