From 892553b1a41b449f58462f123eca2bf2c6c56b33 Mon Sep 17 00:00:00 2001 From: Nate Clark Date: Wed, 4 Jan 2017 15:21:17 -0500 Subject: [PATCH] libblkid/minix: Sanity check superblock s_state for v 1 and 2 Swap devices with specific values in the uuid can look like minix devices to blkid. Add an extra check to make sure the state of the filesystem has valid state flags. A couple of offending swap uuids include: 35f1f264-137f-471a-bc85-acc9f4bc04a3 35f1f264-7f13-471a-bc85-acc9f4bc04a3 35f1f264-138f-471a-bc85-acc9f4bc04a3 35f1f264-8f13-471a-bc85-acc9f4bc04a3 Without this change a swap device with any of those uuids would be detected as minix and swap by blkid. Signed-off-by: Nate Clark --- libblkid/src/superblocks/minix.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libblkid/src/superblocks/minix.c b/libblkid/src/superblocks/minix.c index 3e126e0ea3..feebc96adc 100644 --- a/libblkid/src/superblocks/minix.c +++ b/libblkid/src/superblocks/minix.c @@ -94,6 +94,10 @@ static int probe_minix(blkid_probe pr, if (version <= 2) { struct minix_super_block *sb = (struct minix_super_block *) data; + uint16_t state = minix_swab16(swabme, sb->s_state); + if ((state & (MINIX_VALID_FS | MINIX_ERROR_FS)) != state) + return 1; + zones = version == 2 ? minix_swab32(swabme, sb->s_zones) : minix_swab16(swabme, sb->s_nzones); ninodes = minix_swab16(swabme, sb->s_ninodes); -- 2.47.3