Re: [PATCH] MIPS: KVM: Fix memory leak on VCPU

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On Thu, Jul 03, 2014 at 09:53:40AM +0100, James Hogan wrote:
> From: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
> 
> Backport of commit 8c9eb041cf76038eb3b62ee259607eec9b89f48d.
> 
> kvm_arch_vcpu_free() is called in 2 code paths:
> 
> 1) kvm_vm_ioctl()
>        kvm_vm_ioctl_create_vcpu()
>            kvm_arch_vcpu_destroy()
>                kvm_arch_vcpu_free()
> 2) kvm_put_kvm()
>        kvm_destroy_vm()
>            kvm_arch_destroy_vm()
>                kvm_mips_free_vcpus()
>                    kvm_arch_vcpu_free()
> 
> Neither of the paths handles VCPU free. We need to do it in
> kvm_arch_vcpu_free() corresponding to the memory allocation in
> kvm_arch_vcpu_create().
> 
> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Reviewed-by: James Hogan <james.hogan@xxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> [james.hogan@xxxxxxxxxx: Backported due to conflict without commit
>  c6c0a6637f9d (MIPS: KVM: Remove redundant NULL checks before kfree())]

Ah, I just added this commit first, that way the backport would be
identical to what is in Linus's tree, thanks.

greg k-h
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