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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 BC5A6C43331 for ; Mon, 11 Nov 2019 19:10:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C42921655 for ; Mon, 11 Nov 2019 19:10:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573499409; bh=Wr+QOl9fx70tvSuUnMOSAVArjRVbhH+B/hgCt7RzL2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Y6fc2JbKAHZW+HTDbB+CONBBTe8nUFvRNGysDVf+vulbEQxhhhRH02oMC8S3f3Ft3 VtId0Fi2U8uPinoeY0cpvgGKJMxPM4J0ztDt0of7nLlSVW3mNn8PkWzedFTwmyFIqD 4IO9zKYVh96GlDljprIXNQvk339RjhdkaYBPiVmA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728002AbfKKScl (ORCPT ); Mon, 11 Nov 2019 13:32:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:49912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727975AbfKKScf (ORCPT ); Mon, 11 Nov 2019 13:32:35 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D4E7C214E0; Mon, 11 Nov 2019 18:32:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573497155; bh=Wr+QOl9fx70tvSuUnMOSAVArjRVbhH+B/hgCt7RzL2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fZcR5idYUcZ/FziZt66TbLA80eSmJ39O7Yxh4GUUgO/l98PZW9qkJBHT56u+5xdfa QtAd4gE1rNX8n2YxS8OYu8FN47572VMf4fySgcf/jBISLPFpkP5FR1yQy86YRNidU4 +noJ78HRmbGhL/e165mznBgVFAjMM+e5bvetsMMw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bernd Krumboeck , Wolfgang Grandegger , Johan Hovold , Marc Kleine-Budde Subject: [PATCH 4.9 22/65] can: usb_8dev: fix use-after-free on disconnect Date: Mon, 11 Nov 2019 19:28:22 +0100 Message-Id: <20191111181345.056368548@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191111181331.917659011@linuxfoundation.org> References: <20191111181331.917659011@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johan Hovold commit 3759739426186a924675651b388d1c3963c5710e upstream. The driver was accessing its driver data after having freed it. Fixes: 0024d8ad1639 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices") Cc: stable # 3.9 Cc: Bernd Krumboeck Cc: Wolfgang Grandegger Signed-off-by: Johan Hovold Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/usb/usb_8dev.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -1007,9 +1007,8 @@ static void usb_8dev_disconnect(struct u netdev_info(priv->netdev, "device disconnected\n"); unregister_netdev(priv->netdev); - free_candev(priv->netdev); - unlink_all_urbs(priv); + free_candev(priv->netdev); } }