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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 91A66C433E6 for ; Wed, 17 Mar 2021 01:03:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6546164F9C for ; Wed, 17 Mar 2021 01:03:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232262AbhCQBDA (ORCPT ); Tue, 16 Mar 2021 21:03:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:36102 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231916AbhCQA7L (ORCPT ); Tue, 16 Mar 2021 20:59:11 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DBD4364FBC; Wed, 17 Mar 2021 00:59:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615942750; bh=UwteTIvtz0sz7yz6zNFbrqtuV5n3YUzbwKmK4nWPcpc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LV+t5LRBYfwp8UqwNtHf71Zz/EjsxFSQwG4aObCUUDfJ877nDH6gjOnIGk8vVbptJ oBCJdbuEAr1Ru9kJ3mLN9JayjFeSSUi6B6kaNxav5D8FaFJaG0ROi4JP2x9HrD/Mox WYqSnMI4IlzEI+EV0jVwazq4V9NEmG4fbKEdwmaQ61INCVI0J0qzVbLojZAquJE0Q5 Vv6xJMUnWfoxT/2WJs13fdR4yKqg6OQzwsFzhGv81qscmgw1qBBh9+mUNRF0QnqXbO G/PcuWLVaH1etZ7RS8bNk2AXDS++RJe/jvl530hIl3sNZPD++GXOxuKW6kySiSKwrr IQauEShnlLp6w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tong Zhang , "David S . Miller" , Sasha Levin , linux-atm-general@lists.sourceforge.net, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 16/23] atm: idt77252: fix null-ptr-dereference Date: Tue, 16 Mar 2021 20:58:42 -0400 Message-Id: <20210317005850.726479-16-sashal@kernel.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210317005850.726479-1-sashal@kernel.org> References: <20210317005850.726479-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 0a67487c0b1d..a2ecb4190f78 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); @@ -336,7 +336,7 @@ 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; } -- 2.30.1