linux-kernel - Re: KASAN: out-of-bounds Read in kvm_arch_hardware

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Message-ID: <20200630061252.GV12312@linux.intel.com>
Date:   Mon, 29 Jun 2020 23:12:52 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     syzbot <syzbot+e0240f9c36530bda7130@...kaller.appspotmail.com>
Cc:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: Re: KASAN: out-of-bounds Read in kvm_arch_hardware_setup

On Sat, Jun 27, 2020 at 01:01:13PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1654e385100000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656
> dashboard link: https://syzkaller.appspot.com/bug?extid=e0240f9c36530bda7130
> compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15f3abc9100000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=131b7bb5100000

#syz dup: general protection fault in syscall_return_slowpath