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 648DBC432C3 for ; Mon, 15 Mar 2021 14:25:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F6A765006 for ; Mon, 15 Mar 2021 14:25:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234353AbhCOOZo (ORCPT ); Mon, 15 Mar 2021 10:25:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:37522 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233013AbhCOOAd (ORCPT ); Mon, 15 Mar 2021 10:00:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 88E6864F16; Mon, 15 Mar 2021 14:00:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816811; bh=F54PcwDAnn2FMWaao0DWhknqEzjDpPH545XJu/fYX0Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MhmUj1NuBejK6oV+G4Mkesx+t27KGd7bIG7S2cz50L8rPtnQWjFd7UjiIYzhmeMo/ 4enMsAVe5gNaofFJkPixwoX0FVGF7ESvwG9r3nlZ2n7LkJ2ey/mzE2xMjxSytb/TUU pck0IlJMiVeD5Dwsp46PDz9F5/stFtLRjlAOSMMw= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tetsuo Handa , Shuah Khan Subject: [PATCH 4.19 084/120] usbip: fix vhci_hcd to check for stream socket Date: Mon, 15 Mar 2021 14:57:15 +0100 Message-Id: <20210315135722.714558186@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 f55a0571690c4aae03180e001522538c0927432f upstream. Fix attach_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/52712aa308915bda02cece1589e04ee8b401d1f3.1615171203.git.skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usbip/vhci_sysfs.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/drivers/usb/usbip/vhci_sysfs.c +++ b/drivers/usb/usbip/vhci_sysfs.c @@ -349,8 +349,16 @@ static ssize_t attach_store(struct devic /* Extract socket from fd. */ socket = sockfd_lookup(sockfd, &err); - if (!socket) + if (!socket) { + dev_err(dev, "failed to lookup sock"); return -EINVAL; + } + if (socket->type != SOCK_STREAM) { + dev_err(dev, "Expecting SOCK_STREAM - found %d", + socket->type); + sockfd_put(socket); + return -EINVAL; + } /* now need lock until setting vdev status as used */