linux-kernel - Re: [syzbot] WARNING in sta_info

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Date:   Wed, 28 Jul 2021 10:36:33 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+45d7c243c006f39dc55a@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [syzbot] WARNING in sta_info_alloc

On Wed, 21 Jul 2021 at 19:40, David Sterba <dsterba@...e.cz> wrote:
>
> On Fri, Jul 16, 2021 at 04:07:06PM -0700, syzbot wrote:
> > syzbot suspects this issue was fixed by commit:
> >
> > commit 282ab3ff16120ec670fe3330e85f8ebf13092f21
> > Author: David Sterba <dsterba@...e.com>
> > Date:   Mon Oct 14 12:38:33 2019 +0000
> >
> >     btrfs: reduce compressed_bio members' types
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12d5f6f2300000
> > start commit:   7f75285ca572 Merge tag 'for-5.12/dm-fixes-3' of git://git...
> > git tree:       upstream
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=b5591c832f889fd9
> > dashboard link: https://syzkaller.appspot.com/bug?extid=45d7c243c006f39dc55a
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=164f385ad00000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1427af9ad00000
> >
> > If the result looks correct, please mark the issue as fixed by replying with:
> >
> > #syz fix: btrfs: reduce compressed_bio members' types
>             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> That's completely unrelated and probably result of unreliable
> biscection. There's a different patch referenced in the dashboard
>
> https://groups.google.com/g/syzkaller-lts-bugs/c/ntHpclbYBMM/m/WG3hW1DvAgAJ
>
>   commit 25487a5ff100398cb214ae854358609e4bbd4e7d
>   Author: Johannes Berg <johann...@...el.com>
>   Date: Mon May 17 14:47:17 2021 +0000
>
>   mac80211: remove warning in ieee80211_get_sband()
>
> that looks more relevant but I don't know if it's the real fix.

Not having better candidates:

#syz fix: mac80211: remove warning in ieee80211_get_sband()