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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 E746FC2BA83 for ; Fri, 14 Feb 2020 17:35:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C55D52168B for ; Fri, 14 Feb 2020 17:35:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581701726; bh=z70ujt1EqXAZKyx0yyjAuQe/ZW4XhB3+LwH5tlRzWqs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ITiAqAmWKvO3tTPAaXoKAlHaq3qx7L7JIOizbNhfZoKZMu4nhRxr4fFhlh6seB/RS CYNtp5sGDltejCakDogcuTM6Oo032+Si6GKD/MLSyCzvEJP/Hdv/4+ip9Qpn5qsaFi wAT+AeizjLYw8bapyi8xqkxE5kbAgyylWDh3blt4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730495AbgBNRfZ (ORCPT ); Fri, 14 Feb 2020 12:35:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:56118 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390264AbgBNQFz (ORCPT ); Fri, 14 Feb 2020 11:05:55 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 64EF3222C2; Fri, 14 Feb 2020 16:05:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696355; bh=z70ujt1EqXAZKyx0yyjAuQe/ZW4XhB3+LwH5tlRzWqs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ql5q+3kWOPnf9mcHwFBUw7F16QVvqRL6Lg80R+HB9GK3St2qIiocNcn76nF468ydC vtMsVhvPpr7EGhenjN4FwFqay1kSrnH+/xgZdG6YbBROttqSzMN7lWH4v26ZdUIth/ p2rFmdq3+FjYU4bvCPdKLIjecd5I29pcQ3mFWiCA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Aditya Pakki , "David S . Miller" , Sasha Levin , linux-atm-general@lists.sourceforge.net, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 188/459] fore200e: Fix incorrect checks of NULL pointer dereference Date: Fri, 14 Feb 2020 10:57:18 -0500 Message-Id: <20200214160149.11681-188-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Aditya Pakki [ Upstream commit bbd20c939c8aa3f27fa30e86691af250bf92973a ] In fore200e_send and fore200e_close, the pointers from the arguments are dereferenced in the variable declaration block and then checked for NULL. The patch fixes these issues by avoiding NULL pointer dereferences. Signed-off-by: Aditya Pakki Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/atm/fore200e.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c index f1a5002053132..8fbd36eb89410 100644 --- a/drivers/atm/fore200e.c +++ b/drivers/atm/fore200e.c @@ -1414,12 +1414,14 @@ fore200e_open(struct atm_vcc *vcc) static void fore200e_close(struct atm_vcc* vcc) { - struct fore200e* fore200e = FORE200E_DEV(vcc->dev); struct fore200e_vcc* fore200e_vcc; + struct fore200e* fore200e; struct fore200e_vc_map* vc_map; unsigned long flags; ASSERT(vcc); + fore200e = FORE200E_DEV(vcc->dev); + ASSERT((vcc->vpi >= 0) && (vcc->vpi < 1<vci >= 0) && (vcc->vci < 1<dev); - struct fore200e_vcc* fore200e_vcc = FORE200E_VCC(vcc); + struct fore200e* fore200e; + struct fore200e_vcc* fore200e_vcc; struct fore200e_vc_map* vc_map; - struct host_txq* txq = &fore200e->host_txq; + struct host_txq* txq; struct host_txq_entry* entry; struct tpd* tpd; struct tpd_haddr tpd_haddr; @@ -1480,9 +1482,18 @@ fore200e_send(struct atm_vcc *vcc, struct sk_buff *skb) unsigned char* data; unsigned long flags; - ASSERT(vcc); - ASSERT(fore200e); - ASSERT(fore200e_vcc); + if (!vcc) + return -EINVAL; + + fore200e = FORE200E_DEV(vcc->dev); + fore200e_vcc = FORE200E_VCC(vcc); + + if (!fore200e) + return -EINVAL; + + txq = &fore200e->host_txq; + if (!fore200e_vcc) + return -EINVAL; if (!test_bit(ATM_VF_READY, &vcc->flags)) { DPRINTK(1, "VC %d.%d.%d not ready for tx\n", vcc->itf, vcc->vpi, vcc->vpi); -- 2.20.1