linux-kernel - Re: [PATCH -mm 2/6] rmap: always add new vmas at the end

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20100622140822.3d290151.akpm@linux-foundation.org>
Date:	Tue, 22 Jun 2010 14:08:22 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-kernel@...r.kernel.org, aarcange@...hat.com,
	linux-mm@...ck.org
Subject: Re: [PATCH -mm 2/6] rmap: always add new vmas at the end

On Mon, 21 Jun 2010 16:33:49 -0400
Rik van Riel <riel@...hat.com> wrote:

> From: Andrea Arcangeli <aarcange@...hat.com>
> Subject: always add new vmas at the end
> 
> Make sure to always add new VMAs at the end of the list.  This
> is important so rmap_walk does not miss a VMA that was created
> during the rmap_walk.
> 
> The old code got this right most of the time due to luck, but
> was buggy when anon_vma_prepare reused a mergeable anon_vma.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
> Signed-off-by: Rik van Riel <riel@...hat.com>
> ---
> 
> diff --git a/mm/rmap.c b/mm/rmap.c
> --- a/mm/rmap.c
> +++ b/mm/rmap.c
> @@ -149,7 +149,7 @@ int anon_vma_prepare(struct vm_area_stru
>  			avc->anon_vma = anon_vma;
>  			avc->vma = vma;
>  			list_add(&avc->same_vma, &vma->anon_vma_chain);
> -			list_add(&avc->same_anon_vma, &anon_vma->head);
> +			list_add_tail(&avc->same_anon_vma, &anon_vma->head);
>  			allocated = NULL;
>  			avc = NULL;
>  		}

Should this go into 2.6.35?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/