linux-kernel - Re: [syzbot] [sysv?] [vfs?] WARNING in invalidate_bh

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Date:   Sat, 29 Apr 2023 23:40:42 -0700
From:   syzbot <syzbot+9743a41f74f00e50fc77@...kaller.appspotmail.com>
To:     tytso@....edu
Cc:     hch@...radead.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        tytso@....edu, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [sysv?] [vfs?] WARNING in invalidate_bh_lru

> On Wed, Dec 21, 2022 at 06:57:38PM -0800, syzbot wrote:
>> Hello,
>> 
>> syzbot found the following issue on:
>> 
>> HEAD commit:    a5541c0811a0 Merge branch 'for-next/core' into for-kernelci
>> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1560b830480000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=cbd4e584773e9397
>> dashboard link: https://syzkaller.appspot.com/bug?extid=9743a41f74f00e50fc77
>> compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
>> userspace arch: arm64
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15e320b3880000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=147c0577880000
>
> #syz set subsystems: sysv, udf

The specified label value is incorrect.
"sysv" is not among the allowed values.
Please use one of the supported label values.

The following labels are suported:
no-reminders, prio: {low, normal, high}, subsystems: {.. see below ..}
The list of subsystems: https://syzkaller.appspot.com/upstream/subsystems?all=true

>
> There are two reproducers, one that mounts a sysv file system, and the
> other which mounts a udf file system.  There is no mention of ext4 in
> the stack trace, and yet syzbot has assigned this to the ext4
> subsystem for some unknown reason.
>
> 					- Ted