Re: [PATCH] xfrm: policy: check policy direction value

[Steffen Klassert]

On Wed, Aug 02, 2017 at 07:50:14PM +0200, Vladis Dronov wrote:
> The 'dir' parameter in xfrm_migrate() is a user-controlled byte which is used
> as an array index. This can lead to an out-of-bound access, kernel lockup and
> DoS. Add a check for the 'dir' value.
> 
> This fixes CVE-2017-11600.
> 
> References: https://bugzilla.redhat.com/show_bug.cgi?id=1474928
> Fixes: 80c9abaabf42 ("[XFRM]: Extension for dynamic update of endpoint address(es)")
> Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.21-rc1
> Reported-by: "bo Zhang" <zhangbo5891001@xxxxxxxxx>
> Signed-off-by: Vladis Dronov <vdronov@xxxxxxxxxx>

Applied to the ipsec tree, thanks!