linux-kernel - RE: [PATCH 1/2] x86/hyper-v: check cpumask_to_vpset() return value in hyperv_flush_tlb_others

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

Message-ID: <SN6PR2101MB1120785831C2538C2C0D93DDDC5B0@SN6PR2101MB1120.namprd21.prod.outlook.com>
Date:   Tue, 10 Jul 2018 19:38:06 +0000
From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] x86/hyper-v: check cpumask_to_vpset() return value in
 hyperv_flush_tlb_others_ex()

From: Vitaly Kuznetsov <vkuznets@...hat.com> Monday, July 9, 2018 10:40 AM
> Commit 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI
> enlightenment") made cpumask_to_vpset() return '-1' when there is a CPU
> with unknown VP index in the supplied set. This needs to be checked before
> we pass 'nr_bank' to hypercall.
> 
> Fixes: 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI enlightenment")
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> ---
>  arch/x86/hyperv/mmu.c | 2 ++
>  1 file changed, 2 insertions(+)

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>