linux-kernel - Re: [PATCH]fix page release issue in filemap

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Message-Id: <1191863723.20745.26.camel@twins>
Date:	Mon, 08 Oct 2007 19:15:23 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Yan Zheng <yanzheng@...n.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH]fix page release issue in filemap_fault

On Mon, 2007-10-08 at 23:28 +0800, Yan Zheng wrote:
> Hi all
> 
> find_lock_page increases page's usage count, we should decrease it
> before return VM_FAULT_SIGBUS
> 
> Signed-off-by: Yan Zheng<yanzheng@...n.com>

Nice catch, .23 material?

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>

> ----
> diff -ur linux-2.6.23-rc9/mm/filemap.c linux/mm/filemap.c
> --- linux-2.6.23-rc9/mm/filemap.c	2007-10-07 15:03:33.000000000 +0800
> +++ linux/mm/filemap.c	2007-10-08 23:14:39.000000000 +0800
> @@ -1388,6 +1388,7 @@
>  	size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
>  	if (unlikely(vmf->pgoff >= size)) {
>  		unlock_page(page);
> +		page_cache_release(page);
>  		goto outside_data_content;
>  	}

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