From patchwork Mon Mar 29 07:57:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 412815 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 78B40C433E0 for ; Mon, 29 Mar 2021 08:02:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 339E46198E for ; Mon, 29 Mar 2021 08:02:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231937AbhC2ICX (ORCPT ); Mon, 29 Mar 2021 04:02:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:43868 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231794AbhC2IBw (ORCPT ); Mon, 29 Mar 2021 04:01:52 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1E8E861974; Mon, 29 Mar 2021 08:01:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617004911; bh=796XK1fpdEtnF+BeXuqvdxkJ3JhwrCxFlzAY/6NgDkY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kreGkA9UM1siSujQlNwUzmzk+htm+dUVoEh+hQy46MCLOsrLrpz08hNdAY+mEulAE j3vp2wdwic49R9IIC8D/00o52zrrUxsPhUnx4O1p8ZgCT0Ywo28Hy5yyk57li9BZib nGIexNlJJwe5WHMnwX5pL+LRWZ7J+gIB8eQ3jg3M= 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 4.9 12/53] atm: idt77252: fix null-ptr-dereference Date: Mon, 29 Mar 2021 09:57:47 +0200 Message-Id: <20210329075607.953308260@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075607.561619583@linuxfoundation.org> References: <20210329075607.561619583@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 4416e98594dc04590ebc498fc4e530009535c511 ] this one is similar to the phy_data allocation fix in uPD98402, the driver allocate the idt77105_priv and store to dev_data but later dereference using dev->dev_data, which will cause null-ptr-dereference. fix this issue by changing dev_data to phy_data so that PRIV(dev) can work correctly. Signed-off-by: Tong Zhang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/atm/idt77105.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/atm/idt77105.c b/drivers/atm/idt77105.c index feb023d7eebd..40644670cff2 100644 --- a/drivers/atm/idt77105.c +++ b/drivers/atm/idt77105.c @@ -261,7 +261,7 @@ static int idt77105_start(struct atm_dev *dev) { unsigned long flags; - if (!(dev->dev_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL))) + if (!(dev->phy_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL))) return -ENOMEM; PRIV(dev)->dev = dev; spin_lock_irqsave(&idt77105_priv_lock, flags); @@ -338,7 +338,7 @@ static int idt77105_stop(struct atm_dev *dev) else idt77105_all = walk->next; dev->phy = NULL; - dev->dev_data = NULL; + dev->phy_data = NULL; kfree(walk); break; }