linux-kernel - Re: [PATCH v2] KVM: apic: avoid calculating pending eoi from an uninitialized val

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <f0a248477e7f43e5ae2d5b817f30dc6d@huawei.com>
Date:   Mon, 24 Feb 2020 01:53:21 +0000
From:   linmiaohe <linmiaohe@...wei.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
CC:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "sean.j.christopherson@...el.com" <sean.j.christopherson@...el.com>,
        "wanpengli@...cent.com" <wanpengli@...cent.com>,
        "jmattson@...gle.com" <jmattson@...gle.com>,
        "joro@...tes.org" <joro@...tes.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>, "hpa@...or.com" <hpa@...or.com>
Subject: Re: [PATCH v2] KVM: apic: avoid calculating pending eoi from an
 uninitialized val

Vitaly Kuznetsov <vkuznets@...hat.com> writes:
>linmiaohe <linmiaohe@...wei.com> writes:
>
>> From: Miaohe Lin <linmiaohe@...wei.com>
>>
>> When pv_eoi_get_user() fails, 'val' may remain uninitialized and the 
>> return value of pv_eoi_get_pending() becomes random. Fix the issue by 
>> initializing the variable.
>
>Well, now the 'perfect' commit message doesn't match the patch :-). I think you (or Paolo upon commit) can just drop the last sentence.

My bad, sorry about it, I should be more careful about it. I will drop the last sentence in v3. Thanks.