From patchwork Tue Apr 5 07:21:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 557619 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E748FC433FE for ; Tue, 5 Apr 2022 09:24:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343957AbiDEJQl (ORCPT ); Tue, 5 Apr 2022 05:16:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244977AbiDEIww (ORCPT ); Tue, 5 Apr 2022 04:52:52 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EDD21D0E6; Tue, 5 Apr 2022 01:48:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 09CA561504; Tue, 5 Apr 2022 08:48:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B688C385A1; Tue, 5 Apr 2022 08:48:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649148504; bh=k+kA+XOU2S9QaW5auCvkHqxpqLDNO4b9XtnucmR8ilA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wWmoDH4VvhWNMEbPPLbEPHTIh4S5DkBg3J8v/R2mb2VuyW6ylRQTMy8jtXbojP0KD +juFni223uey48+5YsSsL56TDvIgPQhlfV/plm8ZB03DYYrdcLoD64cOtY2ZwEX9Qv 3i5DkQQ4Lgs+yawzOm39X+OADT2r7HLVl2R9Y+5g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miaoqian Lin , Codrin Ciubotariu , Mark Brown , Sasha Levin Subject: [PATCH 5.16 0378/1017] ASoC: atmel: Fix error handling in snd_proto_probe Date: Tue, 5 Apr 2022 09:21:31 +0200 Message-Id: <20220405070405.506970709@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070354.155796697@linuxfoundation.org> References: <20220405070354.155796697@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miaoqian Lin [ Upstream commit b0bfaf0544d08d093d6211d7ef8816fb0b5b6c75 ] The device_node pointer is returned by of_parse_phandle() with refcount incremented. We should use of_node_put() on it when done. This function only calls of_node_put() in the regular path. And it will cause refcount leak in error paths. Fix this by calling of_node_put() in error handling too. Fixes: a45f8853a5f9 ("ASoC: Add driver for PROTO Audio CODEC (with a WM8731)") Signed-off-by: Miaoqian Lin Reviewed-by: Codrin Ciubotariu Link: https://lore.kernel.org/r/20220308013949.20323-1-linmq006@gmail.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/atmel/mikroe-proto.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/sound/soc/atmel/mikroe-proto.c b/sound/soc/atmel/mikroe-proto.c index f9331f7e80fe..5b513ff7fe2d 100644 --- a/sound/soc/atmel/mikroe-proto.c +++ b/sound/soc/atmel/mikroe-proto.c @@ -115,7 +115,8 @@ static int snd_proto_probe(struct platform_device *pdev) cpu_np = of_parse_phandle(np, "i2s-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "i2s-controller missing\n"); - return -EINVAL; + ret = -EINVAL; + goto put_codec_node; } dai->cpus->of_node = cpu_np; dai->platforms->of_node = cpu_np; @@ -125,7 +126,8 @@ static int snd_proto_probe(struct platform_device *pdev) &bitclkmaster, &framemaster); if (bitclkmaster != framemaster) { dev_err(&pdev->dev, "Must be the same bitclock and frame master\n"); - return -EINVAL; + ret = -EINVAL; + goto put_cpu_node; } if (bitclkmaster) { if (codec_np == bitclkmaster) @@ -136,18 +138,20 @@ static int snd_proto_probe(struct platform_device *pdev) dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL); } - of_node_put(bitclkmaster); - of_node_put(framemaster); - dai->dai_fmt = dai_fmt; - - of_node_put(codec_np); - of_node_put(cpu_np); + dai->dai_fmt = dai_fmt; ret = snd_soc_register_card(&snd_proto); if (ret && ret != -EPROBE_DEFER) dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); + +put_cpu_node: + of_node_put(bitclkmaster); + of_node_put(framemaster); + of_node_put(cpu_np); +put_codec_node: + of_node_put(codec_np); return ret; }