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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E13DDC433FE for ; Wed, 10 Nov 2021 18:51:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C60C06135E for ; Wed, 10 Nov 2021 18:51:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233257AbhKJSxz (ORCPT ); Wed, 10 Nov 2021 13:53:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:47598 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233010AbhKJSuI (ORCPT ); Wed, 10 Nov 2021 13:50:08 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 890BD61361; Wed, 10 Nov 2021 18:46:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636570019; bh=1jwbG5JvQnwVZJOTrihR3UoYDfVzfY9qH4ncG3kh3WI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s0Ar+3PL3pP3sTlvA6DLUSnI8TrusmhuZlhmGnELCePQ6o5xnGxS9GelPZ5xptZIf 5wi5Bh7k1ftaVjAtYLRrmanoaEZPtomWO/uAT6A2maI65vn5vdhK2PYeINR7G7ChPO +GH1N4lIJpsF2IVmZhB/nRwE7dg+uD8lX0Gc9Xgo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Viraj Shah Subject: [PATCH 4.19 05/16] usb: musb: Balance list entry in musb_gadget_queue Date: Wed, 10 Nov 2021 19:43:38 +0100 Message-Id: <20211110182002.167181265@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211110182001.994215976@linuxfoundation.org> References: <20211110182001.994215976@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: Viraj Shah commit 21b5fcdccb32ff09b6b63d4a83c037150665a83f upstream. musb_gadget_queue() adds the passed request to musb_ep::req_list. If the endpoint is idle and it is the first request then it invokes musb_queue_resume_work(). If the function returns an error then the error is passed to the caller without any clean-up and the request remains enqueued on the list. If the caller enqueues the request again then the list corrupts. Remove the request from the list on error. Fixes: ea2f35c01d5ea ("usb: musb: Fix sleeping function called from invalid context for hdrc glue") Cc: stable Signed-off-by: Viraj Shah Link: https://lore.kernel.org/r/20211021093644.4734-1-viraj.shah@linutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_gadget.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1248,9 +1248,11 @@ static int musb_gadget_queue(struct usb_ status = musb_queue_resume_work(musb, musb_ep_restart_resume_work, request); - if (status < 0) + if (status < 0) { dev_err(musb->controller, "%s resume work: %i\n", __func__, status); + list_del(&request->list); + } } unlock: