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| author | Jim Mattson <jmattson@google.com> | 2018-01-04 01:31:38 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-01-05 18:48:40 +0300 |
| commit | 0cb5b30698fdc8f6b4646012e3acb4ddce430788 (patch) | |
| tree | 5d4f85bedfcc2fcd851597303960de5cffaebd81 /arch/s390/kvm/kvm-s390.c | |
| parent | aa12f594f97efe50223611dbd13ecca4e8dafee6 (diff) | |
| download | linux-0cb5b30698fdc8f6b4646012e3acb4ddce430788.tar.xz | |
kvm: vmx: Scrub hardware GPRs at VM-exit
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>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
0 files changed, 0 insertions, 0 deletions