linux-kernel - Re: Re: [PATCH] fix memory leak on kvm_vm_ioctl_create_spapr

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Message-ID: <20170827210220.GG5426@ZenIV.linux.org.uk>
Date:   Sun, 27 Aug 2017 22:02:20 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Paul Mackerras <paulus@...abs.org>
Cc:     Nixiaoming <nixiaoming@...wei.com>,
        David Hildenbrand <david@...hat.com>,
        "agraf@...e.com" <agraf@...e.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "kvm-ppc@...r.kernel.org" <kvm-ppc@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Re: [PATCH] fix memory leak on kvm_vm_ioctl_create_spapr_tce

On Wed, Aug 23, 2017 at 04:06:24PM +1000, Paul Mackerras wrote:

> It seems to me that it would be better to do the anon_inode_getfd()
> call before the kvm_get_kvm() call, and go to the fail label if it
> fails.

And what happens if another thread does close() on the (guessed) fd?