mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Xiao Yang
427db760cf
On ext4 filesystem, the kernel carshes at mount time when s_first_meta_bg's value exceeds the largest possible meta_bg number. This kernel bug has been fixed in: 3a4b77c ext4: validate s_first_meta_bg at mount time [eguan: add comments on the first_meta_bg value] Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
66 lines
2.0 KiB
Bash
Executable File
66 lines
2.0 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test ext4/025
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#
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# Regression test for commit:
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# 3a4b77c ("ext4: validate s_first_meta_bg at mount time").
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Fujitsu. All Rights Reserved.
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# Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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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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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rm -f $tmp.*
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}
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# get standard environment 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 $seqres.full
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# real QA test starts here
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_supported_fs ext4
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_supported_os Linux
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_require_scratch_nocheck
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_require_command "$DEBUGFS_PROG" debugfs
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_require_ext4_mkfs_feature "bigalloc,meta_bg,^resize_inode"
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echo "Create ext4 fs and modify first_meta_bg's value"
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_scratch_mkfs "-O bigalloc,meta_bg,^resize_inode" >> $seqres.full 2>&1
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# set a big enough first_meta_bg to trigger buffer overrun
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# 842150400 is from original fuzzed ext4 image in bug report
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$DEBUGFS_PROG -w -R "ssv first_meta_bg 842150400" $SCRATCH_DEV >> $seqres.full 2>&1
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echo "Try to mount a modified ext4 fs"
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_scratch_mount >> $seqres.full 2>&1 || echo "Fail to mount ext4 fs expectedly"
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# success, all done
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status=0
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exit
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