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=-11.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 53870C4360C for ; Thu, 10 Oct 2019 10:44:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D85A20B7C for ; Thu, 10 Oct 2019 10:44:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570704250; bh=gr6IxDxFpSVlUX1rmkgICP9h/5dWKFaOXunfXgqMO5c=; h=Subject:To:From:Date:List-ID:From; b=Zfc+LzV4pYog16y3pRw/vEawWcjmPsIkxJAiZh+TdFA4JHgNO1vS038H15o+WEUZz B2K4nrDpYOLt8sFjHKJw3wcPJgNDa6oqk9yIFTXTZPq0L7fO7mWhGF5gfE0moAn41f iM21ANcHLYVAmrPQpgOJ3GeiStbsopz7mEr5RpME= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727116AbfJJKoJ (ORCPT ); Thu, 10 Oct 2019 06:44:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:45658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbfJJKoJ (ORCPT ); Thu, 10 Oct 2019 06:44:09 -0400 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 8944F20B7C; Thu, 10 Oct 2019 10:44:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570704249; bh=gr6IxDxFpSVlUX1rmkgICP9h/5dWKFaOXunfXgqMO5c=; h=Subject:To:From:Date:From; b=CeIDxwYVCQ5FQ1q0fMNFqDN/Tgp+A1r3Ha4DWkxnobwgFelcm7iekeSzsp/IkuxpI NMuukkNr2F+9T+AMmDUP0u+fsm3cHp31bL1Aw87hqaqBR9VUDB7ZWXgLkfpP9a6z5h m52WqncvgGQ5JO5wTo7ZRSwPbhB3+jLxzXHZuZa0= Subject: patch "USB: chaoskey: fix use-after-free on release" added to usb-linus To: johan@kernel.org, gregkh@linuxfoundation.org, stable@vger.kernel.org From: Date: Thu, 10 Oct 2019 12:43:54 +0200 Message-ID: <157070423423375@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled USB: chaoskey: fix use-after-free on release to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 93ddb1f56ae102f14f9e46a9a9c8017faa970003 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 9 Oct 2019 17:38:45 +0200 Subject: USB: chaoskey: fix use-after-free on release The driver was accessing its struct usb_interface in its release() callback without holding a reference. This would lead to a use-after-free whenever the device was disconnected while the character device was still open. Fixes: 66e3e591891d ("usb: Add driver for Altus Metrum ChaosKey device (v2)") Cc: stable # 4.1 Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191009153848.8664-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/chaoskey.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/usb/misc/chaoskey.c b/drivers/usb/misc/chaoskey.c index cf5828ce927a..34e6cd6f40d3 100644 --- a/drivers/usb/misc/chaoskey.c +++ b/drivers/usb/misc/chaoskey.c @@ -98,6 +98,7 @@ static void chaoskey_free(struct chaoskey *dev) usb_free_urb(dev->urb); kfree(dev->name); kfree(dev->buf); + usb_put_intf(dev->interface); kfree(dev); } } @@ -145,6 +146,8 @@ static int chaoskey_probe(struct usb_interface *interface, if (dev == NULL) goto out; + dev->interface = usb_get_intf(interface); + dev->buf = kmalloc(size, GFP_KERNEL); if (dev->buf == NULL) @@ -174,8 +177,6 @@ static int chaoskey_probe(struct usb_interface *interface, goto out; } - dev->interface = interface; - dev->in_ep = in_ep; if (le16_to_cpu(udev->descriptor.idVendor) != ALEA_VENDOR_ID) -- 2.23.0