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Date:   Thu, 5 Jan 2023 10:03:19 +0100
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Subject: Re: [PATCH v2 1/1] mm: fix vma->anon_name memory leak for anonymous
 shmem VMAs
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To:     Suren Baghdasaryan <surenb@google.com>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     hughd@google.com, hannes@cmpxchg.org, vincent.whitchurch@axis.com,
        seanjc@google.com, rppt@kernel.org, shy828301@gmail.com,
        pasha.tatashin@soleen.com, paul.gortmaker@windriver.com,
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        cgel.zte@gmail.com, yuzhao@google.com, bagasdotme@gmail.com,
        suleiman@google.com, steven@liquorix.net, heftig@archlinux.org,
        cuigaosheng1@huawei.com, kirill@shutemov.name,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-mm@kvack.org,
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References: <20230105000241.1450843-1-surenb@google.com>
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 <CAJuCfpGHMeWSSp+ge3pPppLrQ5BpGiga=fjKmDk65GTjFDV=3w@mail.gmail.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
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On 05.01.23 03:39, Suren Baghdasaryan wrote:
> On Wed, Jan 4, 2023 at 5:38 PM Andrew Morton <akpm@linux-foundation.org> wrote:
>>
>> On Wed,  4 Jan 2023 16:02:40 -0800 Suren Baghdasaryan <surenb@google.com> wrote:
>>
>>> free_anon_vma_name() is missing a check for anonymous shmem VMA which
>>> leads to a memory leak due to refcount not being dropped.  Fix this by
>>> calling anon_vma_name_put() unconditionally. It will free vma->anon_name
>>> whenever it's non-NULL.
>>>
>>> Fixes: d09e8ca6cb93 ("mm: anonymous shared memory naming")
>>
>> A cc:stable is appropriate here, yes?
> 
> Hmm. The patch we are fixing here was merged in 6.2-rc1. Should I CC
> stable to fix the previous -rc branch?
> 

No need for stable if it's not in a release kernel yet.

-- 
Thanks,

David / dhildenb