Ack: hfs: add sanity check for file name length
 

On Thu, Nov 24, 2011 at 05:50:54PM +0000, Andy Whitcroft wrote:
> From: Dan Carpenter <dan.carpenter@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@netasq.com>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> Cc: stable@kernel.org
> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
>
> (cherry picked from commit bc5b8a9003132ae44559edd63a1623b7b99dfb68)
> CVE-2011-4330
> BugLink: http://bugs.launchpad.net/bugs/894374
> Signed-off-by: Andy Whitcroft <apw@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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