Return-Path: Received: from mail.kernel.org ([198.145.29.99]:58894 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726452AbeLKPmb (ORCPT ); Tue, 11 Dec 2018 10:42:31 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pan Bian , "David S. Miller" Subject: [PATCH 3.18 02/54] rapidio/rionet: do not free skb before reading its length Date: Tue, 11 Dec 2018 16:40:50 +0100 Message-Id: <20181211151546.123868470@linuxfoundation.org> In-Reply-To: <20181211151546.010073210@linuxfoundation.org> References: <20181211151546.010073210@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pan Bian [ Upstream commit cfc435198f53a6fa1f656d98466b24967ff457d0 ] skb is freed via dev_kfree_skb_any, however, skb->len is read then. This may result in a use-after-free bug. Fixes: e6161d64263 ("rapidio/rionet: rework driver initialization and removal") Signed-off-by: Pan Bian Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/rionet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/rionet.c +++ b/drivers/net/rionet.c @@ -215,9 +215,9 @@ static int rionet_start_xmit(struct sk_b * it just report sending a packet to the target * (without actual packet transfer). */ - dev_kfree_skb_any(skb); ndev->stats.tx_packets++; ndev->stats.tx_bytes += skb->len; + dev_kfree_skb_any(skb); } }