From 7567cae105e435b53e5a3e778546dd3ec53e3204 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Tue, 9 Mar 2010 12:01:10 +0200 Subject: [PATCH] KVM: take srcu lock before call to complete_pio() complete_pio() may use slot table which is protected by srcu. Signed-off-by: Gleb Natapov Cc: stable@kernel.org Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 24cd0ee896e9..2eb999dc9774 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4483,7 +4483,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) kvm_set_cr8(vcpu, kvm_run->cr8); if (vcpu->arch.pio.cur_count) { + vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); r = complete_pio(vcpu); + srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); if (r) goto out; } -- 2.30.2