From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA90DC678D5 for ; Tue, 7 Mar 2023 17:38:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231882AbjCGRiV (ORCPT ); Tue, 7 Mar 2023 12:38:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231886AbjCGRhm (ORCPT ); Tue, 7 Mar 2023 12:37:42 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56D5D8F70D for ; Tue, 7 Mar 2023 09:33:47 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id EED1BB81851 for ; Tue, 7 Mar 2023 17:33:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44760C433EF; Tue, 7 Mar 2023 17:33:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678210424; bh=nCgy3LUOP3yJeam8inpqFOBfdblksxUA3J4qWFGlPzA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FzPo1YF3FXNYhbNY5YlgHnQ/LKRi/oBarDVAzwX2OGSGfYevIsALqAHoBYURtwfjA QZMrxe1BuC9eT7X0cIeYSOWNGJxmpk/ms9kQPa2rmKk7xdaBq4dRFON+wwz2fFDuZn oh6YgxaZ+aV+1fInQeLERZ6gY+Evxn7s56ATt4Vw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nikita Zhandarovich , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.2 0537/1001] RDMA/cxgb4: add null-ptr-check after ip_dev_find() Date: Tue, 7 Mar 2023 17:55:09 +0100 Message-Id: <20230307170044.757533111@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170022.094103862@linuxfoundation.org> References: <20230307170022.094103862@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nikita Zhandarovich [ Upstream commit ef42520240aacfc0d46c8d780c051d135a8dc9b7 ] ip_dev_find() may return NULL and assign it to pdev which is dereferenced later. Fix this by checking the return value of ip_dev_find() for NULL similar to the way it is done with other instances of said function. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 1cab775c3e75 ("RDMA/cxgb4: Fix LE hash collision bug for passive open connection") Signed-off-by: Nikita Zhandarovich Link: https://lore.kernel.org/r/20230201172103.17261-1-n.zhandarovich@fintech.ru Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/cxgb4/cm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 499a425a33791..ea3ddf0d24114 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -4144,6 +4144,10 @@ static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb) if (neigh->dev->flags & IFF_LOOPBACK) { pdev = ip_dev_find(&init_net, iph->daddr); + if (!pdev) { + pr_err("%s - failed to find device!\n", __func__); + goto free_dst; + } e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, pdev, 0); pi = (struct port_info *)netdev_priv(pdev); -- 2.39.2