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| author | Nicholas Krause <xerofoify@gmail.com> | 2015-12-30 19:08:46 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-07 14:51:32 +0100 |
| commit | 1dab1345d885819a3a0d5d08ce0b5c2e12c65343 (patch) | |
| tree | b6e8d7aabaca0e4d215534a723aef18557f73eec /arch/x86 | |
| parent | kvm: x86: fix comment about {mmu,nested_mmu}.gva_to_gpa (diff) | |
| download | linux-1dab1345d885819a3a0d5d08ce0b5c2e12c65343.tar.xz linux-1dab1345d885819a3a0d5d08ce0b5c2e12c65343.zip | |
kvm: x86: Check kvm_write_guest return value in kvm_write_wall_clock
This makes sure the wall clock is updated only after an odd version value
is successfully written to guest memory.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b6102c1eb3b1..102c3028513f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1169,7 +1169,8 @@ static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) ++version; - kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); + if (kvm_write_guest(kvm, wall_clock, &version, sizeof(version))) + return; /* * The guest calculates current wall clock time by adding |