32 lines
1003 B
Diff
32 lines
1003 B
Diff
From 46d9108009ccb9ac567cc285a15efb05864932d5 Mon Sep 17 00:00:00 2001
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From: Davidlohr Bueso <dave@gnu.org>
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Date: Tue, 11 Sep 2012 19:22:32 +0200
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Subject: [PATCH 21/89] gpt: require first_usable_LBA <= last_usable_LBA
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When verifying GPT header integrity, ensure that the
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first usable LBA is no larger than the last usable LBA.
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* libparted/labels/gpt.c (_header_is_valid): Reject a header
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with last_usable < first_usable.
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---
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libparted/labels/gpt.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/libparted/labels/gpt.c b/libparted/labels/gpt.c
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index 6032e3f..83e518f 100644
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--- a/libparted/labels/gpt.c
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+++ b/libparted/labels/gpt.c
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@@ -653,6 +653,10 @@ _header_is_valid (PedDisk const *disk, GuidPartitionTableHeader_t *gpt,
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if (first_usable < 3)
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return 0;
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+ PedSector last_usable = PED_LE64_TO_CPU (gpt->LastUsableLBA);
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+ if (last_usable < first_usable)
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+ return 0;
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+
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origcrc = gpt->HeaderCRC32;
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gpt->HeaderCRC32 = 0;
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if (pth_crc32 (dev, gpt, &crc) != 0)
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--
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1.8.5.3
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