Re: INFO: task hung in fb_release

Daniel Vetter
2020-01-07T15:48:01Z

On Mon, Dec 23, 2019 at 02:31:01AM -0800, syzbot wrote:
> syzbot has bisected this bug to:
>
> commit e3933f26b657c341055443103bad331f4537b113
> Author: Rex Zhu <Rex.Zhu@amd.com>
> Date: Tue Jan 16 10:35:15 2018 +0000
>
> drm/amd/pp: Add edit/commit/show OD clock/voltage support in sysfs

Pretty sure you don't even have that driver loaded ... from the config:

# CONFIG_DRM_AMDGPU is not set

:-)

Cheers, Daniel
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12b5a799e00000
> start commit: c6017471 Merge tag 'xfs-5.5-fixes-2' of git://git.kernel.o..
> git tree: upstream
> final crash: https://syzkaller.appspot.com/x/report.txt?x=11b5a799e00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=16b5a799e00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=7f6119e2e3675a73
> dashboard link: https://syzkaller.appspot.com/bug?extid=d130c4a0890561cfac5b
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=169b1925e00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12b9623ee00000
>
> Reported-by: syzbot+d130c4a0890561cfac5b@syzkaller.appspotmail.com
> Fixes: e3933f26b657 ("drm/amd/pp: Add edit/commit/show OD clock/voltage
> support in sysfs")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

--
Daniel Vetter
Software Engineer, Intel Corporation