From patchwork Thu Oct 8 21:40:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Kleine-Budde X-Patchwork-Id: 11824649 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2639C433E7 for ; Thu, 8 Oct 2020 21:40:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A84222244 for ; Thu, 8 Oct 2020 21:40:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730262AbgJHVkd (ORCPT ); Thu, 8 Oct 2020 17:40:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727560AbgJHVkb (ORCPT ); Thu, 8 Oct 2020 17:40:31 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 440D9C0613D4 for ; Thu, 8 Oct 2020 14:40:31 -0700 (PDT) Received: from heimdall.vpn.pengutronix.de ([2001:67c:670:205:1d::14] helo=blackshift.org) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1kQdeH-0001aU-7D; Thu, 08 Oct 2020 23:40:29 +0200 From: Marc Kleine-Budde To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, kernel@pengutronix.de, Cong Wang , syzbot+3f3837e61a48d32b495f@syzkaller.appspotmail.com, Robin van der Gracht , Oleksij Rempel , Oliver Hartkopp , Marc Kleine-Budde Subject: [PATCH 2/3] can: j1935: j1939_tp_tx_dat_new(): fix missing initialization of skbcnt Date: Thu, 8 Oct 2020 23:40:21 +0200 Message-Id: <20201008214022.2044402-3-mkl@pengutronix.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201008214022.2044402-1-mkl@pengutronix.de> References: <20201008214022.2044402-1-mkl@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:205:1d::14 X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Cong Wang This fixes an uninit-value warning: BUG: KMSAN: uninit-value in can_receive+0x26b/0x630 net/can/af_can.c:650 Reported-and-tested-by: syzbot+3f3837e61a48d32b495f@syzkaller.appspotmail.com Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Cc: Robin van der Gracht Cc: Oleksij Rempel Cc: Pengutronix Kernel Team Cc: Oliver Hartkopp Cc: Marc Kleine-Budde Signed-off-by: Cong Wang Link: https://lore.kernel.org/r/20201008061821.24663-1-xiyou.wangcong@gmail.com Signed-off-by: Marc Kleine-Budde --- net/can/j1939/transport.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c index 0cec4152f979..88cf1062e1e9 100644 --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -580,6 +580,7 @@ sk_buff *j1939_tp_tx_dat_new(struct j1939_priv *priv, skb->dev = priv->ndev; can_skb_reserve(skb); can_skb_prv(skb)->ifindex = priv->ndev->ifindex; + can_skb_prv(skb)->skbcnt = 0; /* reserve CAN header */ skb_reserve(skb, offsetof(struct can_frame, data));