Commit 0ff77873 authored Jul 02, 2009 by Marcelo Tosatti Committed by Avi Kivity Aug 05, 2009

KVM: PIT: fix kpit_elapsed division by zero



Fix division by zero triggered by latch count command on uninitialized
counter.

Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

parent e125e7b6

arch/x86/kvm/i8254.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -104,6 +104,9 @@ static s64 __kpit_elapsed(struct kvm *kvm)
		ktime_t remaining;
		struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;

		if (!ps->pit_timer.period)
		return 0;

		/*
		* The Counter does not stop when it reaches zero. In
		* Modes 0, 1, 4, and 5 the Counter ``wraps around'' to