linux-kernel - [PATCH v2 0/4] KVM: x86: get CPL from SS.DPL

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-next>] [day] [month] [year] [list]

Message-Id: <1400172691-27030-1-git-send-email-pbonzini@redhat.com>
Date:	Thu, 15 May 2014 18:51:27 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	jan.kiszka@...mens.com, kvm@...r.kernel.org, gleb@...nel.org,
	avi.kivity@...il.com
Subject: [PATCH v2 0/4] KVM: x86: get CPL from SS.DPL

Another day, another CPL patch...

It turns out that the simple approach of getting CPL from SS.DPL
broke x86/taskswitch2.flat.  To fix that, already "imagine" that the
CPL is CS.RPL, or 3 for VM86 tasks, while loading segment descriptors
during task switches.  This removes the hack where task switches call
kvm_set_rflags to override the VM flag (patch 2).

While at it, add a new privilege test during task switches that is
missing.

Patch 4 is the same as before.

Paolo Bonzini (4):
  KVM: x86: use new CS.RPL as CPL during task switch
  KVM: x86: drop set_rflags callback
  KVM: x86: check CS.DPL against RPL during task switch
  KVM: x86: get CPL from SS.DPL

 arch/x86/include/asm/kvm_emulate.h |  1 -
 arch/x86/include/asm/kvm_host.h    |  1 -
 arch/x86/kvm/emulate.c             | 63 ++++++++++++++++++++++----------------
 arch/x86/kvm/svm.c                 | 35 +++++++++------------
 arch/x86/kvm/vmx.c                 | 24 +++------------
 arch/x86/kvm/x86.c                 |  6 ----
 6 files changed, 54 insertions(+), 76 deletions(-)

-- 
1.8.3.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/