28 lines
929 B
Diff
28 lines
929 B
Diff
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From 28ac93e737ae4e2055ff23f2ea6021b1127b40a2 Mon Sep 17 00:00:00 2001
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From: Rod Smith <rodsmith@rodsbooks.com>
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Date: Wed, 13 Jan 2021 10:29:24 -0500
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Subject: [PATCH 2/2] Fix bug that could cause crash if a badly-formatted MBR
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disk was read.
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---
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basicmbr.cc | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/basicmbr.cc b/basicmbr.cc
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index 8fbffd1..2da56db 100644
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--- a/basicmbr.cc
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+++ b/basicmbr.cc
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@@ -258,7 +258,8 @@ int BasicMBRData::ReadLogicalParts(uint64_t extendedStart, int partNum) {
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if (EbrLocations[i] == offset) { // already read this one; infinite logical partition loop!
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cerr << "Logical partition infinite loop detected! This is being corrected.\n";
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allOK = -1;
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- partNum -= 1;
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+ if (partNum > 0) //don't go negative
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+ partNum -= 1;
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} // if
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} // for
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EbrLocations[partNum] = offset;
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--
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2.35.1
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