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=-18.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 03AB3C433B4 for ; Thu, 13 May 2021 16:33:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4CFB61438 for ; Thu, 13 May 2021 16:33:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232830AbhEMQeR (ORCPT ); Thu, 13 May 2021 12:34:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:35364 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229687AbhEMQeQ (ORCPT ); Thu, 13 May 2021 12:34:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E2D2D61438; Thu, 13 May 2021 16:33:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620923586; bh=55ymi2uiRIUa4FJKqbz31Lb2fBkXoN4zUe9td29tyLw=; h=Subject:To:From:Date:From; b=PXbVPgMSvwHc6VLblfacCgyb2AYXbZYAyi4kT2vooKOB5EEpEcQaJKUoK1ZtE0iVS duwcNNS36JFvTplmFUyTiEZiWw7FFqnj59Qan6i9lYAq0mKYJ7t63+Md+atinZxtRf Yp5xrJ1i9q/iIYR1xuI7K+Czqinz60PrBO4Bi3VI= Subject: patch "rapidio: handle create_workqueue() failure" added to char-misc-linus To: mail@anirudhrb.com, akpm@linux-foundation.org, alex.bou9@gmail.com, gregkh@linuxfoundation.org, mporter@kernel.crashing.org, stable@vger.kernel.org, torvalds@linux-foundation.org From: Date: Thu, 13 May 2021 18:32:54 +0200 Message-ID: <1620923574866@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit 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 rapidio: handle create_workqueue() failure to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-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 69ce3ae36dcb03cdf416b0862a45369ddbf50fdf Mon Sep 17 00:00:00 2001 From: Anirudh Rayabharam Date: Mon, 3 May 2021 13:57:12 +0200 Subject: rapidio: handle create_workqueue() failure In case create_workqueue() fails, release all resources and return -ENOMEM to caller to avoid potential NULL pointer deref later. Move up the create_workequeue() call to return early and avoid unwinding the call to riocm_rx_fill(). Cc: Alexandre Bounine Cc: Matt Porter Cc: Andrew Morton Cc: Linus Torvalds Cc: stable Signed-off-by: Anirudh Rayabharam Link: https://lore.kernel.org/r/20210503115736.2104747-46-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/rapidio/rio_cm.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c index e6c16f04f2b4..db4c265287ae 100644 --- a/drivers/rapidio/rio_cm.c +++ b/drivers/rapidio/rio_cm.c @@ -2127,6 +2127,14 @@ static int riocm_add_mport(struct device *dev, return -ENODEV; } + cm->rx_wq = create_workqueue(DRV_NAME "/rxq"); + if (!cm->rx_wq) { + rio_release_inb_mbox(mport, cmbox); + rio_release_outb_mbox(mport, cmbox); + kfree(cm); + return -ENOMEM; + } + /* * Allocate and register inbound messaging buffers to be ready * to receive channel and system management requests @@ -2137,7 +2145,6 @@ static int riocm_add_mport(struct device *dev, cm->rx_slots = RIOCM_RX_RING_SIZE; mutex_init(&cm->rx_lock); riocm_rx_fill(cm, RIOCM_RX_RING_SIZE); - cm->rx_wq = create_workqueue(DRV_NAME "/rxq"); INIT_WORK(&cm->rx_work, rio_ibmsg_handler); cm->tx_slot = 0; -- 2.31.1