mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
2529c9486a
Fully scripted conversion, see script in initial SPDX license commit message. tests/xfs/044 was hand massaged to remove duplicate copyright and divider lines before running the script. Signed-off-by: Dave Chinner <dchinner@redhat.com>
76 lines
1.9 KiB
Bash
Executable File
76 lines
1.9 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test No. 433
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#
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# Regression test for an XFS NULL xattr buffer problem during unlink. XFS had a
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# bug where the attr fork walk during file removal could go off the rails due to
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# a stale reference to content of a released buffer. Memory pressure could cause
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# this reference to point to free or reused memory and cause subsequent
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# attribute fork lookups to fail, return a NULL buffer and possibly crash.
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#
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# This test emulates this behavior using an error injection knob to explicitly
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# disable buffer LRU caching. This forces the attr walk to execute under
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# conditions where each buffer is immediately freed on release.
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#
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# Commit f35c5e10c6ed ("xfs: reinit btree pointer on attr tree inactivation
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# walk") fixed the bug.
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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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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/attr
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. ./common/inject
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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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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_xfs_io_error_injection buf_lru_ref
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_require_scratch
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_require_attrs
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_scratch_mkfs > $seqres.full 2>&1
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_scratch_mount
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file=$SCRATCH_MNT/testfile
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# create a bunch of xattrs to form a multi-level attr tree
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touch $file
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for i in $(seq 0 499); do
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$SETFATTR_PROG -n trusted.user.$i -v 0 $file
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done
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# cycle the mount to clear any buffer references
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_scratch_cycle_mount || _fail "cycle mount failure"
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# disable the lru cache and unlink the file
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_scratch_inject_error buf_lru_ref 1
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rm -f $file
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_scratch_inject_error buf_lru_ref 0
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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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