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Commit 18595411 authored by Guo Chao's avatar Guo Chao Committed by Marcelo Tosatti
Browse files

KVM: do not kfree error pointer 



We should avoid kfree()ing error pointer in kvm_vcpu_ioctl() and
kvm_arch_vcpu_ioctl().

Signed-off-by: default avatarGuo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent f026399f

arch/x86/kvm/x86.c

+6 −13
Original line number Diff line number Diff line
@@ -2689,14 +2689,11 @@ long kvm_arch_vcpu_ioctl(struct file *filp, 
		break;

	}

	case KVM_SET_LAPIC: {

		r = -EINVAL;

		if (!vcpu->arch.apic)

			goto out;

		u.lapic = memdup_user(argp, sizeof(*u.lapic));

		if (IS_ERR(u.lapic)) {

			r = PTR_ERR(u.lapic);

			goto out;

		}

		if (IS_ERR(u.lapic))

			return PTR_ERR(u.lapic);



		r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic);

		if (r)
@@ -2877,10 +2874,8 @@ long kvm_arch_vcpu_ioctl(struct file *filp, 
	}

	case KVM_SET_XSAVE: {

		u.xsave = memdup_user(argp, sizeof(*u.xsave));

		if (IS_ERR(u.xsave)) {

			r = PTR_ERR(u.xsave);

			goto out;

		}

		if (IS_ERR(u.xsave))

			return PTR_ERR(u.xsave);



		r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave);

		break;
@@ -2902,10 +2897,8 @@ long kvm_arch_vcpu_ioctl(struct file *filp, 
	}

	case KVM_SET_XCRS: {

		u.xcrs = memdup_user(argp, sizeof(*u.xcrs));

		if (IS_ERR(u.xcrs)) {

			r = PTR_ERR(u.xcrs);

			goto out;

		}

		if (IS_ERR(u.xcrs))

			return PTR_ERR(u.xcrs);



		r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs);

		break;

virt/kvm/kvm_main.c

+2 −0
Original line number Diff line number Diff line
@@ -1954,6 +1954,7 @@ static long kvm_vcpu_ioctl(struct file *filp, 
		kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs));

		if (IS_ERR(kvm_sregs)) {

			r = PTR_ERR(kvm_sregs);

			kvm_sregs = NULL;

			goto out;

		}

		r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs);
@@ -2054,6 +2055,7 @@ static long kvm_vcpu_ioctl(struct file *filp, 
		fpu = memdup_user(argp, sizeof(*fpu));

		if (IS_ERR(fpu)) {

			r = PTR_ERR(fpu);

			fpu = NULL;

			goto out;

		}

		r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu);