Commit 1dab1345 authored Dec 30, 2015 by Nicholas Krause Committed by Paolo Bonzini Jan 07, 2016

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>

parent 0af2593b

arch/x86/kvm/x86.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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