diff options
| author | Avi Kivity <avi@redhat.com> | 2010-05-13 11:50:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:23:04 -0700 |
| commit | 8d3c865a11cc027bee53985237e12b086a6d7f41 (patch) | |
| tree | cde02291fcca85892d9957e74cc295c500b855e8 | |
| parent | 548d65e9b09a7321e2da125acae765d1e902b6cd (diff) | |
KVM: x86: Add missing locking to arch specific vcpu ioctls
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
(Cherry-picked from commit 8fbf065d625617bbbf6b72d5f78f84ad13c8b547)
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ead3ea4070bf..5b66418a7cdb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1776,6 +1776,7 @@ static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, { int r; + vcpu_load(vcpu); r = -E2BIG; if (cpuid->nent < vcpu->arch.cpuid_nent) goto out; @@ -1787,6 +1788,7 @@ static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, out: cpuid->nent = vcpu->arch.cpuid_nent; + vcpu_put(vcpu); return r; } @@ -2042,6 +2044,7 @@ static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, int r; unsigned bank_num = mcg_cap & 0xff, bank; + vcpu_load(vcpu); r = -EINVAL; if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) goto out; @@ -2056,6 +2059,7 @@ static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, for (bank = 0; bank < bank_num; bank++) vcpu->arch.mce_banks[bank*4] = ~(u64)0; out: + vcpu_put(vcpu); return r; } @@ -2323,7 +2327,9 @@ long kvm_arch_vcpu_ioctl(struct file *filp, r = -EFAULT; if (copy_from_user(&mce, argp, sizeof mce)) goto out; + vcpu_load(vcpu); r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); + vcpu_put(vcpu); break; } case KVM_GET_VCPU_EVENTS: { |