From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758244AbcAPBb1 (ORCPT ); Fri, 15 Jan 2016 20:31:27 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:35774 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751781AbcAPADE (ORCPT ); Fri, 15 Jan 2016 19:03:04 -0500 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Sabrina Dubroca , "David S. Miller" , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 038/305] ipvlan: fix use after free of skb Date: Fri, 15 Jan 2016 15:57:32 -0800 Message-Id: <1452902519-2754-39-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1452902519-2754-1-git-send-email-kamal@canonical.com> References: <1452902519-2754-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.8-ckt2 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Sabrina Dubroca commit a534dc529853c69e94994aa47c1d80a03ce2c11d upstream. ipvlan_handle_frame is a rx_handler, and when it returns a value other than RX_HANDLER_CONSUMED (here, NET_RX_DROP aka RX_HANDLER_ANOTHER), __netif_receive_skb_core expects that the skb still exists and will process it further, but we just freed it. Fixes: 2ad7bf363841 ("ipvlan: Initial check-in of the IPVLAN driver.") Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- drivers/net/ipvlan/ipvlan_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c index a50a942..b64e172 100644 --- a/drivers/net/ipvlan/ipvlan_core.c +++ b/drivers/net/ipvlan/ipvlan_core.c @@ -651,5 +651,5 @@ rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb) WARN_ONCE(true, "ipvlan_handle_frame() called for mode = [%hx]\n", port->mode); kfree_skb(skb); - return NET_RX_DROP; + return RX_HANDLER_CONSUMED; } -- 1.9.1