linux-ext4 - Re: [syzbot] [ext4?] WARNING in setattr

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Date:   Mon, 18 Sep 2023 03:50:25 -0700
From:   syzbot <syzbot+450a6d7e0a2db0d8326a@...kaller.appspotmail.com>
To:     brauner@...nel.org
Cc:     adilger.kernel@...ger.ca, brauner@...nel.org, jlayton@...nel.org,
        linux-ext4@...r.kernel.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] [ext4?] WARNING in setattr_copy

> On Fri, Sep 15, 2023 at 11:51:54PM -0700, syzbot wrote:
>> Hello,
>> 
>> syzbot found the following issue on:
>> 
>> HEAD commit:    3c13c772fc23 Add linux-next specific files for 20230912
>> git tree:       linux-next
>> console+strace: https://syzkaller.appspot.com/x/log.txt?x=15b02b0c680000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=f7149cbda1664bc5
>> dashboard link: https://syzkaller.appspot.com/bug?extid=450a6d7e0a2db0d8326a
>> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=155b32b4680000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12cf6028680000
>> 
>> Downloadable assets:
>> disk image: https://storage.googleapis.com/syzbot-assets/eb6fbc71f83a/disk-3c13c772.raw.xz
>> vmlinux: https://storage.googleapis.com/syzbot-assets/2d671ade67d9/vmlinux-3c13c772.xz
>> kernel image: https://storage.googleapis.com/syzbot-assets/b2b7190a3a61/bzImage-3c13c772.xz
>> 
>> The issue was bisected to:
>> 
>> commit d6f106662147d78e9a439608e8deac7d046ca0fa
>> Author: Jeff Layton <jlayton@...nel.org>
>> Date:   Wed Aug 30 18:28:43 2023 +0000
>> 
>>     fs: have setattr_copy handle multigrain timestamps appropriately
>> 
>> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1419f8d8680000
>> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1619f8d8680000
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1219f8d8680000
>> 
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+450a6d7e0a2db0d8326a@...kaller.appspotmail.com
>> Fixes: d6f106662147 ("fs: have setattr_copy handle multigrain timestamps appropriately")
>
> #syz unset subsystems: ext4
> #syz set subsystems: overlayfs

Command #1:
The following labels did not exist: subsystems:, ext4