linux-kernel - Re: [syzbot] BUG: spinlock bad magic in synchronize

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Date:   Thu, 28 Oct 2021 14:58:13 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     syzbot <syzbot+05017ad275a64a3246f8@...kaller.appspotmail.com>
Cc:     bcm-kernel-feedback-list@...adcom.com, bhelgaas@...gle.com,
        bp@...en8.de, dave.hansen@...ux.intel.com,
        devel@...verdev.osuosl.org, f.fainelli@...il.com,
        gregkh@...uxfoundation.org, hpa@...or.com,
        info@...tasdeplastico.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-pci@...r.kernel.org,
        linux-rpi-kernel-owner@...ts.infradead.org,
        linux-rpi-kernel@...ts.infradead.org, lorenzo.pieralisi@....com,
        mchehab@...nel.org, mingo@...hat.com, nsaenzjulienne@...e.de,
        pbonzini@...hat.com, robh@...nel.org,
        sean.j.christopherson@...el.com, sfr@...b.auug.org.au,
        syzkaller-bugs@...glegroups.com, tcs_kernel@...cent.com,
        tglx@...utronix.de, vkuznets@...hat.com, wanpengli@...cent.com,
        x86@...nel.org
Subject: Re: [syzbot] BUG: spinlock bad magic in synchronize_srcu

On Wed, Oct 27, 2021, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit eb7511bf9182292ef1df1082d23039e856d1ddfb
> Author: Haimin Zhang <tcs_kernel@...cent.com>
> Date:   Fri Sep 3 02:37:06 2021 +0000
> 
>     KVM: x86: Handle SRCU initialization failure during page track init
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143e2b02b00000
> start commit:   78e709522d2c Merge tag 'for_linus' of git://git.kernel.org..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2150ebd7e72fa695
> dashboard link: https://syzkaller.appspot.com/bug?extid=05017ad275a64a3246f8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10b72895300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14c42853300000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: KVM: x86: Handle SRCU initialization failure during page track init

#syz fix: KVM: x86: Handle SRCU initialization failure during page track init