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From 6eb3a6579768458c13c26958e1cc3fbffe2ada70 Mon Sep 17 00:00:00 2001
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From: Nate Clark <nate@neworld.us>
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Date: Wed, 4 Jan 2017 15:21:17 -0500
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Subject: [PATCH 175/176] libblkid/minix: Sanity check superblock s_state for v
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1 and 2
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Swap devices with specific values in the uuid can look like minix
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devices to blkid. Add an extra check to make sure the state of the
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filesystem has valid state flags.
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A couple of offending swap uuids include:
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35f1f264-137f-471a-bc85-acc9f4bc04a3
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35f1f264-7f13-471a-bc85-acc9f4bc04a3
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35f1f264-138f-471a-bc85-acc9f4bc04a3
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35f1f264-8f13-471a-bc85-acc9f4bc04a3
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Without this change a swap device with any of those uuids would be
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detected as minix and swap by blkid.
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1594681
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Upstream: http://github.com/karelzak/util-linux/commit/892553b1a41b449f58462f123eca2bf2c6c56b33
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Signed-off-by: Nate Clark <nate@neworld.us>
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---
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libblkid/src/superblocks/minix.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/libblkid/src/superblocks/minix.c b/libblkid/src/superblocks/minix.c
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index a20d51f2c..4e70fda8f 100644
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--- a/libblkid/src/superblocks/minix.c
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+++ b/libblkid/src/superblocks/minix.c
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@@ -93,6 +93,10 @@ static int probe_minix(blkid_probe pr, const struct blkid_idmag *mag)
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if (sb->s_imap_blocks == 0 || sb->s_zmap_blocks == 0)
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return 1;
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+ uint16_t state = minix_swab16(swabme, sb->s_state);
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+ if ((state & (MINIX_VALID_FS | MINIX_ERROR_FS)) != state)
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+ return 1;
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+
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zones = version == 2 ? minix_swab32(swabme, sb->s_zones) :
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minix_swab16(swabme, sb->s_nzones);
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ninodes = minix_swab16(swabme, sb->s_ninodes);
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--
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2.14.4
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