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=-19.0 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=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 838DCC433E6 for ; Mon, 15 Mar 2021 14:29:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C25464E86 for ; Mon, 15 Mar 2021 14:29:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234708AbhCOO3P (ORCPT ); Mon, 15 Mar 2021 10:29:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:37670 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233008AbhCOOAd (ORCPT ); Mon, 15 Mar 2021 10:00:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E2AAA64F39; Mon, 15 Mar 2021 14:00:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816810; bh=7FnpRKc4Wvba20HFD+Q6GPJu64JtwqjEycgRBK0bmhA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YTaylO/I52wF0c1TkTmyQKaWH+m3M6tuQ2WvVY6bHNh4OxQ1trE7FBKLrPqMyBIlX A9FzdptJVjJgEbAtMnYC7VMnouF4Gt/YXE6I7qYVtcJWp0KIcLRFM6JGy2z7sFvho0 c3XX823I2jcmOISa+0y4RpVsUHqdfv2m5pYaGTz0= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tetsuo Handa , Shuah Khan Subject: [PATCH 4.19 083/120] usbip: fix stub_dev to check for stream socket Date: Mon, 15 Mar 2021 14:57:14 +0100 Message-Id: <20210315135722.680996357@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135720.002213995@linuxfoundation.org> References: <20210315135720.002213995@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Kroah-Hartman From: Shuah Khan commit 47ccc8fc2c9c94558b27b6f9e2582df32d29e6e8 upstream. Fix usbip_sockfd_store() to validate the passed in file descriptor is a stream socket. If the file descriptor passed was a SOCK_DGRAM socket, sock_recvmsg() can't detect end of stream. Cc: stable@vger.kernel.org Suggested-by: Tetsuo Handa Signed-off-by: Shuah Khan Link: https://lore.kernel.org/r/e942d2bd03afb8e8552bd2a5d84e18d17670d521.1615171203.git.skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/stub_dev.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -69,8 +69,16 @@ static ssize_t usbip_sockfd_store(struct } socket = sockfd_lookup(sockfd, &err); - if (!socket) + if (!socket) { + dev_err(dev, "failed to lookup sock"); goto err; + } + + if (socket->type != SOCK_STREAM) { + dev_err(dev, "Expecting SOCK_STREAM - found %d", + socket->type); + goto sock_err; + } sdev->ud.tcp_socket = socket; sdev->ud.sockfd = sockfd; @@ -100,6 +108,8 @@ static ssize_t usbip_sockfd_store(struct return count; +sock_err: + sockfd_put(socket); err: spin_unlock_irq(&sdev->ud.lock); return -EINVAL;