linux-kernel - Re: [PATCH] kvm: x86: mmu: fix memoryleak in kvm_mmu_vendor_module

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Message-ID: <YwZHYZFj5Q8NzZha@google.com>
Date:   Wed, 24 Aug 2022 15:44:33 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Miaohe Lin <linmiaohe@...wei.com>
Cc:     pbonzini@...hat.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kvm: x86: mmu: fix memoryleak in
 kvm_mmu_vendor_module_init()

Nit for future patches, please use

  KVM: x86/mmu:

for the scope.

On Tue, Aug 23, 2022, Miaohe Lin wrote:
> When register_shrinker() fails, we forgot to release the percpu counter
> kvm_total_used_mmu_pages leading to memoryleak. Fix this issue by calling
> percpu_counter_destroy() when register_shrinker() fails.
> 
> Fixes: ab271bd4dfd5 ("x86: kvm: propagate register_shrinker return code")
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
> ---

Reviewed-by: Sean Christopherson <seanjc@...gle.com>