linux-kernel - Re: [PATCH] KVM: fix memoryleak in kvm

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Message-ID: <YxE+Y1ZDaPgChrrS@google.com>
Date:   Thu, 1 Sep 2022 23:21:07 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Miaohe Lin <linmiaohe@...wei.com>, vkuznets@...hat.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: fix memoryleak in kvm_init()

On Fri, Sep 02, 2022, Paolo Bonzini wrote:
> On 8/30/22 23:36, Sean Christopherson wrote:
> > On Tue, Aug 23, 2022, Miaohe Lin wrote:
> > > When alloc_cpumask_var_node() fails for a certain cpu, there might be some
> > > allocated cpumasks for percpu cpu_kick_mask. We should free these cpumasks
> > > or memoryleak will occur.
> > > 
> > > Fixes: baff59ccdc65 ("KVM: Pre-allocate cpumasks for kvm_make_all_cpus_request_except()")
> > > Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
> > > ---
> > 
> > Pushed to branch `for_paolo/6.1` at:
> > 
> >      https://github.com/sean-jc/linux.git
> > 
> > Unless you hear otherwise, it will make its way to kvm/queue "soon".
> > 
> > Note, the commit IDs are not guaranteed to be stable.
> 
> Hmm, I was going to merge these memory leak fixes for 6.0, but no big deal
> since they're mostly theoretical anyway.

Take them, I wasn't sure and was anticipating possibly dropping them anyways.  I
can easily adjust, and was deliberately a little greedy for these technically-a-bug
memory leaks so that we would't miss them by thinking the other would grab 'em.