mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
9062902a59
This is a regression test for a specific bug that requires a specific configuration of the data device. Realtime volumes and external logs don't affect the efficacy of the test, but the test can fail mkfs if the realtime device is very large. Therefore, unset USE_EXTERNAL so that we always run this regression test, even if the tester enabled realtime. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
89 lines
2.2 KiB
Bash
Executable File
89 lines
2.2 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2020 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test 520
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#
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# Verify kernel doesn't hang when mounting a crafted image
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# with bad agf.freeblks metadata due to CVE-2020-12655.
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#
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# Also, check if
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# commit d0c7feaf8767 ("xfs: add agf freeblocks verify in xfs_agf_verify")
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# is included in the current kernel.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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_scratch_unmount > /dev/null 2>&1
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs xfs
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_disable_dmesg_check
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_require_check_dmesg
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_require_scratch_nocheck
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# Don't let the rtbitmap fill up the data device and screw up this test
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unset USE_EXTERNAL
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force_crafted_metadata() {
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_scratch_mkfs_xfs -f $fsdsopt "$4" >> $seqres.full 2>&1 || _fail "mkfs failed"
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_scratch_xfs_set_metadata_field "$1" "$2" "$3" >> $seqres.full 2>&1
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local kmsg="xfs/$seq: testing $1=$2 at $(date +"%F %T")"
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local mounted=0
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local hasmsg=0
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echo "${kmsg}" > /dev/kmsg
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_try_scratch_mount >> $seqres.full 2>&1 && mounted=1
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if [ $mounted -ne 0 ]; then
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dd if=/dev/zero of=$SCRATCH_MNT/test bs=65536 count=1 >> \
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$seqres.full 2>&1
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sync
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fi
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_dmesg_since_test_start | tac | sed -ne "0,\#${kmsg}#p" | tac | \
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egrep -q 'Metadata corruption detected at' && hasmsg=1
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_scratch_unmount > /dev/null 2>&1
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[ $mounted -eq 0 -o $hasmsg -eq 1 ] || \
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_fail "potential broken kernel (mounted=${mounted},hasmsg=${hasmsg})"
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}
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bigval=100000000
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fsdsopt="-d agcount=1,size=64m"
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force_crafted_metadata freeblks 0 "agf 0"
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force_crafted_metadata longest $bigval "agf 0"
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force_crafted_metadata length $bigval "agf 0"
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_scratch_mkfs_xfs_supported -m reflink=1 >> $seqres.full 2>&1 && \
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force_crafted_metadata refcntblocks $bigval "agf 0" "-m reflink=1"
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_scratch_mkfs_xfs_supported -m rmapbt=1 >> $seqres.full 2>&1 && \
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force_crafted_metadata rmapblocks $bigval "agf 0" "-m rmapbt=1"
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echo "Silence is golden"
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# success, all done
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status=0
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exit
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