From patchwork Mon Mar 29 07:57:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 411426 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 478F4C433ED for ; Mon, 29 Mar 2021 08:24:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C97F619B6 for ; Mon, 29 Mar 2021 08:24:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232405AbhC2IYW (ORCPT ); Mon, 29 Mar 2021 04:24:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:50648 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232412AbhC2IHU (ORCPT ); Mon, 29 Mar 2021 04:07:20 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 525F66196F; Mon, 29 Mar 2021 08:07:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617005240; bh=NdobjXfxkUlLQQgYLGkOOaDb142VgIraDp2YTCi1ccA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g69eJdDpmtxRoSRIKS+0RsQcJ8BNUWCjX29SI5OA5BYzQK5EZBx7BCfNpmH2rL1HV CkEryNkqq6oNXMM9IukuCUEbWQ+n1EehHK1JTpBQjuJCUuZEvkkO/HoRxDPI1Sg32h xSzPn8L8/iU3LK4oSAnFWKbG+M+QAToh0z4FwL1w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tong Zhang , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 15/72] atm: uPD98402: fix incorrect allocation Date: Mon, 29 Mar 2021 09:57:51 +0200 Message-Id: <20210329075610.780161572@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075610.300795746@linuxfoundation.org> References: <20210329075610.300795746@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tong Zhang [ Upstream commit 3153724fc084d8ef640c611f269ddfb576d1dcb1 ] dev->dev_data is set in zatm.c, calling zatm_start() will overwrite this dev->dev_data in uPD98402_start() and a subsequent PRIV(dev)->lock (i.e dev->phy_data->lock) will result in a null-ptr-dereference. I believe this is a typo and what it actually want to do is to allocate phy_data instead of dev_data. Signed-off-by: Tong Zhang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/atm/uPD98402.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/atm/uPD98402.c b/drivers/atm/uPD98402.c index 4fa13a807873..cf517fd148ea 100644 --- a/drivers/atm/uPD98402.c +++ b/drivers/atm/uPD98402.c @@ -210,7 +210,7 @@ static void uPD98402_int(struct atm_dev *dev) static int uPD98402_start(struct atm_dev *dev) { DPRINTK("phy_start\n"); - if (!(dev->dev_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL))) + if (!(dev->phy_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL))) return -ENOMEM; spin_lock_init(&PRIV(dev)->lock); memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));