Re: [PATCH 1/2] f2fs/021: test quota mount option

[Chao Yu <chao@kernel.org>]

On 9/27/2025 2:18 AM, Zorro Lang wrote:
> On Mon, Sep 01, 2025 at 10:03:30AM +0800, Chao Yu wrote:
>> This testcase tries to check whether f2fs can handle "usrjquota="
>> during remount correctly, it expects kernel will encounter NULL
>> pointer dereference bug w/o the fix ("f2fs: fix to avoid NULL pointer
>> dereference in f2fs_check_quota_consistency()").
>>
>> Cc: Jaegeuk Kim <jaegeuk@kernel.org>
>> Signed-off-by: Chao Yu <chao@kernel.org>
>> ---
>>   tests/f2fs/021     | 30 ++++++++++++++++++++++++++++++
>>   tests/f2fs/021.out |  2 ++
>>   2 files changed, 32 insertions(+)
>>   create mode 100755 tests/f2fs/021
>>   create mode 100644 tests/f2fs/021.out
>>
>> diff --git a/tests/f2fs/021 b/tests/f2fs/021
>> new file mode 100755
>> index 00000000..c41760fc
>> --- /dev/null
>> +++ b/tests/f2fs/021
>> @@ -0,0 +1,30 @@
>> +#! /bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +# Copyright (c) 2025 Chao Yu.  All Rights Reserved.
>> +#
>> +# FS QA Test No. f2fs/021
>> +#
>> +# This testcase tries to check whether f2fs can handle "usrjquota="
>> +# during remount correctly
>> +#
>> +. ./common/preamble
>> +_begin_fstest auto quick mount
>                                    ^^^^^^^^^^^^^
>                                    quota remount
> 
> I'll help to add these two tags when I merge it. Others look good to me,
> if you've maken sure it can trigger the bug you want to uncover.
> 
> Reviewed-by: Zorro Lang <zlang@redhat.com>

Thanks for the fix.

Thanks,

> 
>> +
>> +_fixed_by_kernel_commit xxxxxxxxxxxx \
>> +	"f2fs: fix to avoid NULL pointer dereference in f2fs_check_quota_consistency()"
>> +
>> +_require_scratch
>> +
>> +_scratch_mkfs >> $seqres.full
>> +_scratch_mount "-o usrquota"
>> +quotacheck -uc $SCRATCH_MNT
>> +_scratch_unmount
>> +
>> +_scratch_mount "-o usrjquota=aquota.user,jqfmt=vfsold"
>> +_scratch_mount "-o remount,usrjquota=,jqfmt=vfsold"
>> +_scratch_unmount
>> +
>> +echo "Silence is golden"
>> +
>> +status=0
>> +exit
>> diff --git a/tests/f2fs/021.out b/tests/f2fs/021.out
>> new file mode 100644
>> index 00000000..09f4062d
>> --- /dev/null
>> +++ b/tests/f2fs/021.out
>> @@ -0,0 +1,2 @@
>> +QA output created by 021
>> +Silence is golden
>> -- 
>> 2.49.0
>>
>