[syzbot] WARNING: fbcon: Driver 'vkmclient_loop: send disconnect: Broken pipe

[syzbot] WARNING: fbcon: Driver 'vkmclient_loop: send disconnect: Broken pipe

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d1d58a880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c29b6436e994d72e
dashboard link: https://syzkaller.appspot.com/bug?extid=8e67d6db6ac1d1b297f7
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=172e57a4880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c8f5131ab57d/disk-55be6084.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/77167f226f35/vmlinux-55be6084.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8e67d6db6ac1d1b297f7@syzkaller.appspotmail.com

WARNING: fbcon: Driver 'vkmclient_loop: send disconnect: Broken pipe


---
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Re: [syzbot] WARNING: fbcon: Driver 'vkmclient_loop: send disconnect: Broken pipe

[syzbot]

syzbot suspects this issue was fixed by commit:

commit ed539ba614a079ea696b92beef1eafec66f831a4
Author: Jakub Kicinski <kuba@kernel.org>
Date:   Fri Jan 6 06:33:57 2023 +0000

    devlink: always check if the devlink instance is registered

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13f213eac80000
start commit:   55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=c29b6436e994d72e
dashboard link: https://syzkaller.appspot.com/bug?extid=8e67d6db6ac1d1b297f7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=172e57a4880000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: devlink: always check if the devlink instance is registered

For information about bisection process see: https://goo.gl/tpsmEJ#bisection