From 18595411a7146330ec19adf0b9db8e6736c84a4e Mon Sep 17 00:00:00 2001 From: Guo Chao Date: Fri, 2 Nov 2012 18:33:21 +0800 Subject: [PATCH] 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: Guo Chao Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/x86.c | 19 ++++++------------- virt/kvm/kvm_main.c | 2 ++ 2 files changed, 8 insertions(+), 13 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 49fa1f0e59bd..40905ce6be0a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 2fb73191801f..316d76aa030d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1954,6 +1954,7 @@ out_free2: 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 @@ out_free2: 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);