netdev - Re: [syzbot] WARNING: suspicious RCU usage (5)

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Date:   Thu, 23 Jun 2022 10:54:37 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     syzbot <syzbot+9cbc6bed3a22f1d37395@...kaller.appspotmail.com>
Cc:     Alexander Lobakin <alobakin@...me>, Borislav Petkov <bp@...en8.de>,
        Daniel Borkmann <daniel@...earbox.net>,
        "Anvin, H. Peter" <hpa@...or.com>,
        Jim Mattson <jmattson@...gle.com>,
        John Fastabend <john.fastabend@...il.com>,
        Joerg Roedel <joro@...tes.org>, kvm <kvm@...r.kernel.org>,
        "Kernel Mailing List, Linux" <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Networking <netdev@...r.kernel.org>,
        Sean Christopherson <seanjc@...gle.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        xuanzhuo@...ux.alibaba.com
Subject: Re: [syzbot] WARNING: suspicious RCU usage (5)

#syz fix: x86/kvm: Fix broken irq restoration in kvm_wait

On Thu, Jun 23, 2022 at 9:35 AM syzbot
<syzbot+9cbc6bed3a22f1d37395@...kaller.appspotmail.com> wrote:
>
> syzbot has bisected this issue to:
>
> commit c2ff53d8049f30098153cd2d1299a44d7b124c57
> Author: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> Date:   Thu Feb 18 20:50:02 2021 +0000
>
>     net: Add priv_flags for allow tx skb without linear
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11596838080000
> start commit:   a5b00f5b78b7 Merge branch 'hns3-fixres'
> git tree:       net
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=13596838080000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15596838080000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=20ac3e0ebf0db3bd
> dashboard link: https://syzkaller.appspot.com/bug?extid=9cbc6bed3a22f1d37395
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143b22abf00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=125194eff00000
>
> Reported-by: syzbot+9cbc6bed3a22f1d37395@...kaller.appspotmail.com
> Fixes: c2ff53d8049f ("net: Add priv_flags for allow tx skb without linear")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>