2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2018 FUJITSU. All Rights Reserved.
7 # Regression test for commit:
8 # 9c92ee2 ("xfs: validate sb_logsunit is a multiple of the fs blocksize")
10 # If log stripe unit isn't a multiple of the fs blocksize and mounting,
11 # the invalid sb_logsunit leads to crash as soon as we try to write to
15 _begin_fstest auto quick fuzzers log
17 # Import common functions.
20 # real QA test starts here
22 _require_scratch_nocheck
23 # We corrupt XFS on purpose, and check if assert failures would crash system.
24 _require_no_xfs_bug_on_assert
29 _scratch_mkfs > $seqres.full 2>&1 || _fail "mkfs failed"
31 # Set logsunit to a value which is not a multiple of the fs blocksize
32 blksz=$(_scratch_xfs_get_sb_field blocksize)
33 _scratch_xfs_set_sb_field logsunit $((blksz - 1)) >> $seqres.full 2>&1
35 # Check if logsunit is set correctly
36 lsunit=$(_scratch_xfs_get_sb_field logsunit)
37 [ $lsunit -ne $((blksz - 1)) ] && _notrun "failed to set sb_logsunit"
39 # Mount and writing log may trigger a crash on buggy kernel
40 # The fix applied kernel refuses to mount, so a mount failure is
42 if _try_scratch_mount >> $seqres.full 2>&1; then
43 for i in $(seq 1 1000); do
44 echo > ${SCRATCH_MNT}/$i
49 # We may trigger assert related WARNINGs if we corrupt log on a CONFIG_XFS_WARN
50 # or CONFIG_XFS_DEBUG (when bug_on_assert is disabled) build, so filter them.
51 _check_dmesg _filter_assert_dmesg
53 echo "Silence is golden"