From patchwork Tue Dec 1 08:53:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 335757 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 C293AC83021 for ; Tue, 1 Dec 2020 09:27:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 692852067D for ; Tue, 1 Dec 2020 09:27:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="iqUJW287" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390649AbgLAJ1a (ORCPT ); Tue, 1 Dec 2020 04:27:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:39316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729254AbgLAJC3 (ORCPT ); Tue, 1 Dec 2020 04:02:29 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 3752520809; Tue, 1 Dec 2020 09:01:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1606813301; bh=7Ue//Zng0WP0KW0pSdTtBSWbvhT1XT/7/kSp4eyX0n8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iqUJW287jqFODTNx0ozNk0Rd+MCHLIAqkvGULBx7BKnUgysFSa0nbwRkCTg/zfbqz OTy/ntzK6W3tdlRNYpTBrOFbiNWKGLaLuN1Lc6bzxFzMOSQZI6c2GPj+rrMTLrtyIc AOn98oFh60DhTJqI/mOkXuCe8Zp+rPKhrSAgRJJI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vamsi Krishna Samavedam , Alan Stern Subject: [PATCH 4.19 50/57] USB: core: Change %pK for __user pointers to %px Date: Tue, 1 Dec 2020 09:53:55 +0100 Message-Id: <20201201084651.570228911@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201201084647.751612010@linuxfoundation.org> References: <20201201084647.751612010@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alan Stern commit f3bc432aa8a7a2bfe9ebb432502be5c5d979d7fe upstream. Commit 2f964780c03b ("USB: core: replace %p with %pK") used the %pK format specifier for a bunch of __user pointers. But as the 'K' in the specifier indicates, it is meant for kernel pointers. The reason for the %pK specifier is to avoid leaks of kernel addresses, but when the pointer is to an address in userspace the security implications are minimal. In particular, no kernel information is leaked. This patch changes the __user %pK specifiers (used in a bunch of debugging output lines) to %px, which will always print the actual address with no mangling. (Notably, there is no printk format specifier particularly intended for __user pointers.) Fixes: 2f964780c03b ("USB: core: replace %p with %pK") CC: Vamsi Krishna Samavedam CC: Signed-off-by: Alan Stern Link: https://lore.kernel.org/r/20201119170228.GB576844@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -463,11 +463,11 @@ static void snoop_urb(struct usb_device if (userurb) { /* Async */ if (when == SUBMIT) - dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " + dev_info(&udev->dev, "userurb %px, ep%d %s-%s, " "length %u\n", userurb, ep, t, d, length); else - dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " + dev_info(&udev->dev, "userurb %px, ep%d %s-%s, " "actual_length %u status %d\n", userurb, ep, t, d, length, timeout_or_status); @@ -1927,7 +1927,7 @@ static int proc_reapurb(struct usb_dev_s if (as) { int retval; - snoop(&ps->dev->dev, "reap %pK\n", as->userurb); + snoop(&ps->dev->dev, "reap %px\n", as->userurb); retval = processcompl(as, (void __user * __user *)arg); free_async(as); return retval; @@ -1944,7 +1944,7 @@ static int proc_reapurbnonblock(struct u as = async_getcompleted(ps); if (as) { - snoop(&ps->dev->dev, "reap %pK\n", as->userurb); + snoop(&ps->dev->dev, "reap %px\n", as->userurb); retval = processcompl(as, (void __user * __user *)arg); free_async(as); } else { @@ -2070,7 +2070,7 @@ static int proc_reapurb_compat(struct us if (as) { int retval; - snoop(&ps->dev->dev, "reap %pK\n", as->userurb); + snoop(&ps->dev->dev, "reap %px\n", as->userurb); retval = processcompl_compat(as, (void __user * __user *)arg); free_async(as); return retval; @@ -2087,7 +2087,7 @@ static int proc_reapurbnonblock_compat(s as = async_getcompleted(ps); if (as) { - snoop(&ps->dev->dev, "reap %pK\n", as->userurb); + snoop(&ps->dev->dev, "reap %px\n", as->userurb); retval = processcompl_compat(as, (void __user * __user *)arg); free_async(as); } else { @@ -2512,7 +2512,7 @@ static long usbdev_do_ioctl(struct file #endif case USBDEVFS_DISCARDURB: - snoop(&dev->dev, "%s: DISCARDURB %pK\n", __func__, p); + snoop(&dev->dev, "%s: DISCARDURB %px\n", __func__, p); ret = proc_unlinkurb(ps, p); break;