diff options
| author | Jim Mattson <jmattson@google.com> | 2018-01-03 14:31:38 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-17 09:29:29 +0100 |
| commit | 17e27ff45ed9c9c87ae918178953e8ac0018522a (patch) | |
| tree | 1bb132d3e27948eca4a73a09e496fa3f282d0b61 /security | |
| parent | 2f9cf5cd5580046fe9ff97dae32f9c753500d4ea (diff) | |
kvm: vmx: Scrub hardware GPRs at VM-exit
commit 0cb5b30698fdc8f6b4646012e3acb4ddce430788 upstream.
Guest GPR values are live in the hardware GPRs at VM-exit. Do not
leave any guest values in hardware GPRs after the guest GPR values are
saved to the vcpu_vmx structure.
This is a partial mitigation for CVE 2017-5715 and CVE 2017-5753.
Specifically, it defeats the Project Zero PoC for CVE 2017-5715.
Suggested-by: Eric Northup <digitaleric@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Eric Northup <digitaleric@google.com>
Reviewed-by: Benjamin Serebrin <serebrin@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
[Paolo: Add AMD bits, Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions