51 lines
1.3 KiB
Diff
51 lines
1.3 KiB
Diff
From 1ab5d84d66f144ef0a9d1ac9502a59a842466504 Mon Sep 17 00:00:00 2001
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From: biubiuzy <294772273@qq.com>
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Date: Wed, 17 Jan 2024 11:23:47 +0800
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Subject: [PATCH] libblkid: (drbd) reduce false-positive
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---
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libblkid/src/superblocks/drbd.c | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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diff --git a/libblkid/src/superblocks/drbd.c b/libblkid/src/superblocks/drbd.c
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index 1723229..410e21d 100644
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--- a/libblkid/src/superblocks/drbd.c
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+++ b/libblkid/src/superblocks/drbd.c
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@@ -18,6 +18,13 @@
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#include "superblocks.h"
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+/*
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+ * drbd/drbd_int.h
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+ */
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+#define BM_BLOCK_SHIFT 12 /* 4k per bit */
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+#define BM_BLOCK_SIZE (1<<BM_BLOCK_SHIFT)
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+
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+
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/*
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* drbd/linux/drbd.h
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*/
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@@ -153,6 +160,9 @@ static int probe_drbd_84(blkid_probe pr)
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be32_to_cpu(md->magic) != DRBD_MD_MAGIC_84_UNCLEAN)
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return 1;
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+ if (be32_to_cpu(read_unaligned_member(md, bm_bytes_per_bit)) != BM_BLOCK_SIZE)
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+ return 1;
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+
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if (!is_zero_padded(member_ptr(md, padding_start),
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member_ptr(md, padding_end)))
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return 1;
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@@ -201,6 +211,9 @@ static int probe_drbd_90(blkid_probe pr)
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if (be32_to_cpu(md->magic) != DRBD_MD_MAGIC_09)
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return 1;
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+ if (be32_to_cpu(read_unaligned_member(md, bm_bytes_per_bit)) != BM_BLOCK_SIZE)
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+ return 1;
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+
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if (!is_zero_padded(member_ptr(md, padding_start),
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member_ptr(md, padding_end)))
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return 1;
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--
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2.33.0
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