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=-12.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_1 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 00397C2B9F7 for ; Fri, 28 May 2021 14:06:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C95EE613E9 for ; Fri, 28 May 2021 14:06:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236334AbhE1OHm (ORCPT ); Fri, 28 May 2021 10:07:42 -0400 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]:14036 "EHLO mx0b-00069f02.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229740AbhE1OHj (ORCPT ); Fri, 28 May 2021 10:07:39 -0400 Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 14SE1a2x025614; Fri, 28 May 2021 14:05:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=x0Z6u2+quld8a1ogwAHqK5j1nZAVx8Hl57Fvz5MNvCM=; b=FkqoxiNfanOAAUlH6X3v7JHncE0SulON8luwQMcmns8XLzdr6BJdpWbJnfmH7OTNvMmc L8SqUOu2wmSmgxxiI/sABhd2hxA7UxOAEvYMjsxv6cxV7H2vnBrS80yFXtz18WBBym+1 uD54X5G2Q0/w64/nWruE87YaK7R8i7K3Q5OREfNc901HlgBYX7G1cMaXqSGROdVsXsTI TTFetJvtBY3uD6WOFAjmn2pZnLpviaC3CTAfz4Xq3qvWF3/5NqnjOQPztJB8THVntB2E CCnWXN6fYDXa3WhJhDSdFN+Cdfzlhwg/9QrEfAkIwJvJHNkr8rpQndz1Cu1o/OLR6wke 7Q== Received: from oracle.com (aserp3030.oracle.com [141.146.126.71]) by mx0b-00069f02.pphosted.com with ESMTP id 38u1meg07p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 May 2021 14:05:15 +0000 Received: from aserp3030.oracle.com (aserp3030.oracle.com [127.0.0.1]) by pps.podrdrct (8.16.0.36/8.16.0.36) with SMTP id 14SDuGWQ184141; Fri, 28 May 2021 14:05:15 GMT Received: from pps.reinject (localhost [127.0.0.1]) by aserp3030.oracle.com with ESMTP id 38pr0eksnr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 May 2021 14:05:15 +0000 Received: from aserp3030.oracle.com (aserp3030.oracle.com [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 14SE1wai002270; Fri, 28 May 2021 14:05:14 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3030.oracle.com with ESMTP id 38pr0eksng-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 May 2021 14:05:14 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 14SE57lC014288; Fri, 28 May 2021 14:05:12 GMT Received: from kadam (/41.212.42.34) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 28 May 2021 07:05:07 -0700 Date: Fri, 28 May 2021 17:05:00 +0300 From: Dan Carpenter To: Dongliang Mu Cc: perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-kernel , syzbot+08a7d8b51ea048a74ffb@syzkaller.appspotmail.com Subject: Re: [PATCH] ALSA: control led: fix memory leak in snd_ctl_led_register Message-ID: <20210528140500.GS24442@kadam> References: <20210528131757.2269989-1-mudongliangabcd@gmail.com> <20210528133309.GR24442@kadam> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-GUID: kGEkvuh53fm-bW_P-RF8g9Ks8iyeQjRF X-Proofpoint-ORIG-GUID: kGEkvuh53fm-bW_P-RF8g9Ks8iyeQjRF Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 28, 2021 at 09:50:49PM +0800, Dongliang Mu wrote: > > Can you please give some advise on how to fix this WARN issue? But it feels like it spoils the fun if I write the commit... Anyway: regards, dan carpenter diff --git a/sound/core/control_led.c b/sound/core/control_led.c index 25f57c14f294..dd357abc1b58 100644 --- a/sound/core/control_led.c +++ b/sound/core/control_led.c @@ -740,6 +740,7 @@ static int __init snd_ctl_led_init(void) for (; group > 0; group--) { led = &snd_ctl_leds[group - 1]; device_del(&led->dev); + device_put(&led->dev); } device_del(&snd_ctl_led_dev); return -ENOMEM; @@ -768,6 +769,7 @@ static void __exit snd_ctl_led_exit(void) for (group = 0; group < MAX_LED; group++) { led = &snd_ctl_leds[group]; device_del(&led->dev); + device_put(&led->dev); } device_del(&snd_ctl_led_dev); snd_ctl_led_clean(NULL);