From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexander Drozdov , Eric Dumazet , "David S. Miller" Subject: [PATCH 3.14 06/96] ipv4: ip_check_defrag should correctly check return value of skb_copy_bits Date: Mon, 16 Mar 2015 15:08:37 +0100 Message-Id: <20150316140855.463829891@linuxfoundation.org> In-Reply-To: <20150316140855.186617380@linuxfoundation.org> References: <20150316140855.186617380@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Drozdov [ Upstream commit fba04a9e0c869498889b6445fd06cbe7da9bb834 ] skb_copy_bits() returns zero on success and negative value on error, so it is needed to invert the condition in ip_check_defrag(). Fixes: 1bf3751ec90c ("ipv4: ip_check_defrag must not modify skb before unsharing") Signed-off-by: Alexander Drozdov Acked-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/ip_fragment.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -684,7 +684,7 @@ struct sk_buff *ip_check_defrag(struct s if (skb->protocol != htons(ETH_P_IP)) return skb; - if (!skb_copy_bits(skb, 0, &iph, sizeof(iph))) + if (skb_copy_bits(skb, 0, &iph, sizeof(iph)) < 0) return skb; if (iph.ihl < 5 || iph.version != 4)