KVM: Initialize fpu state in preemptible context

[mirror_ubuntu-zesty-kernel.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index fa708c9a74377c41d1c17d255f8e26f4cf5d2b47..9dda70dffac19b99950c24b7028aa8724447849c 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5376,6 +5376,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
        int r;
        sigset_t sigsaved;
 
+       if (!tsk_used_math(current) && init_fpu(current))
+               return -ENOMEM;
+
        if (vcpu->sigset_active)
                sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);