From: David Rientjes <rientjes@google.com>
To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
koct9i@gmail.com, stable@vger.kernel.org
Subject: Re: [PATCH v2] mm: rmap: fix use-after-free in __put_anon_vma
Date: Sat, 7 Jun 2014 14:50:30 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.02.1406071450190.24927@chino.kir.corp.google.com> (raw)
In-Reply-To: <1402067370-5773-1-git-send-email-a.ryabinin@samsung.com>
On Fri, 6 Jun 2014, Andrey Ryabinin wrote:
> While working address sanitizer for kernel I've discovered use-after-free
> bug in __put_anon_vma.
> For the last anon_vma, anon_vma->root freed before child anon_vma.
> Later in anon_vma_free(anon_vma) we are referencing to already freed anon_vma->root
> to check rwsem.
> This patch puts freeing of child anon_vma before freeing of anon_vma->root.
>
> Cc: <stable@vger.kernel.org> # v3.0+
> Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Acked-by: David Rientjes <rientjes@google.com>
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prev parent reply other threads:[~2014-06-07 21:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-06 11:30 [PATCH] " Andrey Ryabinin
2014-06-06 11:56 ` Peter Zijlstra
2014-06-06 14:16 ` Andrey Ryabinin
2014-06-06 15:09 ` [PATCH v2] " Andrey Ryabinin
2014-06-06 15:30 ` Peter Zijlstra
2014-06-07 21:50 ` David Rientjes [this message]
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