From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH] {iproute2, xfrm}: Use memcpy to suppress gcc phony
 buffer overflow warning
Date: Mon, 30 Sep 2013 21:10:41 -0700
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Cc: Sohny Thomas <sthomas@linux.vnet.ibm.com>,
	David Laight <David.Laight@aculab.com>,
	<netdev@vger.kernel.org>
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> diff --git a/ip/xfrm_state.c b/ip/xfrm_state.c
> index 0d98e78..5cc87d3 100644
> --- a/ip/xfrm_state.c
> +++ b/ip/xfrm_state.c
> @@ -159,7 +159,7 @@ static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
>   			if (len > max)
>   				invarg("\"ALGO-KEY\" makes buffer overflow\n", key);
> 
> -			strncpy(buf, key, len);
> +			memcpy(buf, key, len);
>   		}
>   	}
> 

Applied this patch. With some edits to make commit message logical.