linux-kernel - Re: [syzbot] memory leak in kvm_vcpu_ioctl_set

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Message-ID: <YfGqBUYWj6nBxntP@google.com>
Date:   Wed, 26 Jan 2022 20:07:33 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     syzbot <syzbot+ead0473557070d5432cd@...kaller.appspotmail.com>
Cc:     bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
        jarkko@...nel.org, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sgx@...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: [syzbot] memory leak in kvm_vcpu_ioctl_set_cpuid2

On Wed, Jan 26, 2022, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    0809edbae347 Merge tag 'devicetree-fixes-for-5.17-1' of gi..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=17982967b00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=cc8d6c95ce1d56de
> dashboard link: https://syzkaller.appspot.com/bug?extid=ead0473557070d5432cd
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1402f91fb00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17ba591fb00000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+ead0473557070d5432cd@...kaller.appspotmail.com

#syz fix: KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}