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authorMarcelo Tosatti <mtosatti@redhat.com>2009-06-23 15:05:14 -0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:33:02 +0300
commit894a9c5543abf6f88d36dc1b9f5d90f35db09cb3 (patch)
tree3fff94c380904dfef66ec7182c4dae59d7c85763 /virt
parentec04b2604c3707a46db1d26d98f82b11d0844669 (diff)
downloadlinux-linaro-stable-894a9c5543abf6f88d36dc1b9f5d90f35db09cb3.tar.gz
KVM: x86: missing locking in PIT/IRQCHIP/SET_BSP_CPU ioctl paths
Correct missing locking in a few places in x86's vm_ioctl handling path. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8361662e7e0a..f1e2e8c373c6 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2274,10 +2274,12 @@ static long kvm_vm_ioctl(struct file *filp,
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
case KVM_SET_BOOT_CPU_ID:
r = 0;
+ mutex_lock(&kvm->lock);
if (atomic_read(&kvm->online_vcpus) != 0)
r = -EBUSY;
else
kvm->bsp_vcpu_id = arg;
+ mutex_unlock(&kvm->lock);
break;
#endif
default: