Jes Sorensen wrote:
> Zhang, Xiantao wrote:
>>> From 62895ff991d48398a77afdbf7f2bef127e802230 Mon Sep 17 00:00:00
>>> 2001
>> From: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
>> Date: Fri, 28 Mar 2008 09:49:57 +0800
>> Subject: [PATCH] KVM: IA64: Add kvm arch-specific core code for
>> kvm/ia64.
>>
>> kvm_ia64.c is created to handle kvm ia64-specific core logic.
>> Signed-off-by: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
>
> More comments, a couple of bugs in this one.
>
>> +#include <linux/module.h>
>> +#include <linux/vmalloc.h>
>
> Don't think you need vmalloc.h here.
Originally, we called vmalloc, but removed later. Maybe we can remove it
now.
>> +int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct
>> kvm_regs *regs) +{
> [snip]
>> + copy_from_user(&vcpu->arch.guest, regs->saved_guest,
>> + sizeof(union context));
>> + copy_from_user(vcpu + 1, regs->saved_stack + sizeof(struct
>> kvm_vcpu),
>> + IA64_STK_OFFSET - sizeof(struct kvm_vcpu));
>
> You need to check the return values from copy_from_user() here and
> deal with possible failure.
>
>> + vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
>> + vcpu->arch.apic->vcpu = vcpu;
>
> Whoops! Missing NULL pointer check here after the kzalloc.
Good catch. Fixed!
>> + copy_to_user(regs->saved_guest, &vcpu->arch.guest,
>> + sizeof(union context)); +
copy_to_user(regs->saved_stack,
>> (void *)vcpu, IA64_STK_OFFSET);
>
> Same problem as above - check the return values.
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