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SubjectRe: WARNING in rcu_check_gp_start_stall
On Sun, Mar 17, 2019 at 03:43:01AM -0700, syzbot wrote:
> syzbot has bisected this bug to:
>
> commit f1e3e92135202ff3d95195393ee62808c109208c
> Author: Malcolm Priestley <tvboxspy@gmail.com>
> Date: Wed Jul 22 18:16:42 2015 +0000
>
> staging: vt6655: fix tagSRxDesc -> next_desc type
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=111856cf200000
> start commit: f1e3e921 staging: vt6655: fix tagSRxDesc -> next_desc type
> git tree: upstream
> final crash: https://syzkaller.appspot.com/x/report.txt?x=131856cf200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=151856cf200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=7132344728e7ec3f
> dashboard link: https://syzkaller.appspot.com/bug?extid=111bc509cd9740d7e4aa
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d4966cc00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c492d0c00000
>
> Reported-by: syzbot+111bc509cd9740d7e4aa@syzkaller.appspotmail.com
> Fixes: f1e3e921 ("staging: vt6655: fix tagSRxDesc -> next_desc type")

I think syzbot is a bit confused here, how can this simple patch, where
you do not have the hardware for this driver, cause this problem?

thanks,

greg k-h

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