linux-kernel - Re: [syzbot] BUG: unable to handle kernel paging request in ovl_set

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Message-ID: <20221103072557.qc2hsowoaatstrbh@wittgenstein>
Date:   Thu, 3 Nov 2022 08:25:57 +0100
From:   Christian Brauner <brauner@...nel.org>
To:     syzbot <syzbot+3f6ef1c4586bb6fd1f61@...kaller.appspotmail.com>
Cc:     linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        miklos@...redi.hu, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] BUG: unable to handle kernel paging request in
 ovl_set_acl

On Wed, Nov 02, 2022 at 07:35:42PM -0700, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    61c3426aca2c Add linux-next specific files for 20221102
> git tree:       linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=118e21de880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=acb529cc910d907c
> dashboard link: https://syzkaller.appspot.com/bug?extid=3f6ef1c4586bb6fd1f61
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1620a689880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=153fb2a9880000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/cc56d88dd6a3/disk-61c3426a.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/5921b65b080f/vmlinux-61c3426a.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/39cbd355fedd/bzImage-61c3426a.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+3f6ef1c4586bb6fd1f61@...kaller.appspotmail.com

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping.git/ 5b52aebef8954cadff29918bb61d7fdc7be07837