Ack: Re: [hardy, lucid, lucid/fsl-imx51, maverick, maverick/ti-omap4, natty, natty/ti-omap4 CVE 1/1] hfs: add sanity check for file name length

[Herton Ronaldo Krzesinski]

On Thu, Nov 24, 2011 at 05:50:54PM +0000, Andy Whitcroft wrote:
> From: Dan Carpenter <dan.carpenter at oracle.com>
> 
> On a corrupted file system the ->len field could be wrong leading to
> a buffer overflow.
> 
> Reported-and-acked-by: Clement LECIGNE <clement.lecigne at netasq.com>
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> Cc: stable at kernel.org
> Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
> 
> (cherry picked from commit bc5b8a9003132ae44559edd63a1623b7b99dfb68)
> CVE-2011-4330
> BugLink: http://bugs.launchpad.net/bugs/894374
> Signed-off-by: Andy Whitcroft <apw at canonical.com>
> ---
>  fs/hfs/trans.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c
> index e673a88..b1ce4c7 100644
> --- a/fs/hfs/trans.c
> +++ b/fs/hfs/trans.c
> @@ -40,6 +40,8 @@ int hfs_mac2asc(struct super_block *sb, char *out, const struct hfs_name *in)
>  
>  	src = in->name;
>  	srclen = in->len;
> +	if (srclen > HFS_NAMELEN)
> +		srclen = HFS_NAMELEN;
>  	dst = out;
>  	dstlen = HFS_MAX_NAMELEN;
>  	if (nls_io) {
> -- 
> 1.7.5.4
> 
> 
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