From: Avi Kivity <avi@redhat.com>
Date: Tue, 27 Jul 2010 11:51:44 +0000 (+0300)
Subject: KVM: fix i8259 oops when no vcpus are online
X-Git-Tag: firefly_0821_release~9833^2~541^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ae0635b3580844e320a253a16985f4ce8b5bd0b6;p=firefly-linux-kernel-4.4.55.git

KVM: fix i8259 oops when no vcpus are online

If there are no vcpus, found will be NULL.  Check before doing anything with
it.

Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 8d10c063d7f2..4b7b73ce2098 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -64,6 +64,9 @@ static void pic_unlock(struct kvm_pic *s)
 		if (!found)
 			found = s->kvm->bsp_vcpu;
 
+		if (!found)
+			return;
+
 		kvm_vcpu_kick(found);
 	}
 }