linux-kernel - [PATCH v3 0/3] Fix undefined operation VMXOFF during reboot and crash

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: <20200704203809.76391-1-dpreed@deepplum.com>
Date:   Sat,  4 Jul 2020 16:38:06 -0400
From:   "David P. Reed" <dpreed@...pplum.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     "David P. Reed" <dpreed@...pplum.com>,
        Andy Lutomirski <luto@...capital.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Allison Randal <allison@...utok.net>,
        Enrico Weigelt <info@...ux.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Martin Molnar <martin.molnar.programming@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Jann Horn <jannh@...gle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 0/3] Fix undefined operation VMXOFF during reboot and crash

At the request of Sean Christopherson, the original patch was split
into three patches, each fixing a distinct issue related to the original
bug, of a hang due to VMXOFF causing an undefined operation fault
when the kernel reboots with CR4.VMXE set. The combination of
the patches is the complete fix to the reported bug, and a lurking
error in asm side effects.

David P. Reed (3):
  Correct asm VMXOFF side effects
  Fix undefined operation fault that can hang a cpu on crash or panic
  Force all cpus to exit VMX root operation on crash/panic reliably

 arch/x86/include/asm/virtext.h | 24 ++++++++++++++++--------
 arch/x86/kernel/reboot.c       | 20 +++++++-------------
 2 files changed, 23 insertions(+), 21 deletions(-)

-- 
2.26.2