From patchwork Tue Jun 21 09:07:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?U2h1bWluZyBb6IyD5pu46YqYXQ==?= X-Patchwork-Id: 583639 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2D0AAC43334 for ; Tue, 21 Jun 2022 09:08:41 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 557192846; Tue, 21 Jun 2022 11:07:49 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 557192846 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1655802519; bh=LmGfl8TuDo6mDnE/xEJVUhMiFm1tNQTXNS8wZ9Djobw=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=WXa9j4/fXpfW8Hy31AJk50G9GHyqjWvQ1rS8Q92jd27Jt24t04Z6TrKhoprMbImIZ zFrntIzL2JvMHL2u4M8hSP9td1LTYvHMMjm991jubHwX7Arp26fncCUAAMH8yoIQIT SuU/SWvzYnHZCsF4oNQ0KfYl2+pnXZflqTCM8Xgs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id EE88BF80152; Tue, 21 Jun 2022 11:07:48 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 9277CF80155; Tue, 21 Jun 2022 11:07:47 +0200 (CEST) Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 19D2EF80152 for ; Tue, 21 Jun 2022 11:07:40 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 19D2EF80152 Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 25L97UQB0002781, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36504.realtek.com.tw[172.21.6.27]) by rtits2.realtek.com.tw (8.15.2/2.71/5.88) with ESMTPS id 25L97UQB0002781 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 21 Jun 2022 17:07:30 +0800 Received: from RTEXMBS01.realtek.com.tw (172.21.6.94) by RTEXH36504.realtek.com.tw (172.21.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Tue, 21 Jun 2022 17:07:30 +0800 Received: from localhost.localdomain (172.22.102.1) by RTEXMBS01.realtek.com.tw (172.21.6.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27; Tue, 21 Jun 2022 17:07:29 +0800 From: To: , Subject: [PATCH] ASoC: rt711-sdca: fix kernel NULL pointer dereference when IO error Date: Tue, 21 Jun 2022 17:07:19 +0800 Message-ID: <20220621090719.30558-1-shumingf@realtek.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 X-Originating-IP: [172.22.102.1] X-ClientProxiedBy: RTEXH36504.realtek.com.tw (172.21.6.27) To RTEXMBS01.realtek.com.tw (172.21.6.94) X-KSE-ServerInfo: RTEXMBS01.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: trusted connection X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 06/21/2022 08:45:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIyLzYvMjEgpFekyCAwNjo1?= =?big5_tw?b?NjowMA==?= X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-ServerInfo: RTEXH36504.realtek.com.tw, 9 X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled Cc: oder_chiou@realtek.com, jack.yu@realtek.com, alsa-devel@alsa-project.org, lars@metafoo.de, derek.fang@realtek.com, Vijendar.Mukunda@amd.com, Shuming Fan , flove@realtek.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Shuming Fan The initial settings will be written before the codec probe function. But, the rt711->component doesn't be assigned yet. If IO error happened during initial settings operations, it will cause the kernel panic. This patch changed component->dev to slave->dev to fix this issue. Signed-off-by: Shuming Fan --- sound/soc/codecs/rt711-sdca.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/rt711-sdca.c b/sound/soc/codecs/rt711-sdca.c index 9d226b1cb7e9..925268121901 100644 --- a/sound/soc/codecs/rt711-sdca.c +++ b/sound/soc/codecs/rt711-sdca.c @@ -34,7 +34,7 @@ static int rt711_sdca_index_write(struct rt711_sdca_priv *rt711, ret = regmap_write(regmap, addr, value); if (ret < 0) - dev_err(rt711->component->dev, + dev_err(&rt711->slave->dev, "Failed to set private value: %06x <= %04x ret=%d\n", addr, value, ret); @@ -50,7 +50,7 @@ static int rt711_sdca_index_read(struct rt711_sdca_priv *rt711, ret = regmap_read(regmap, addr, value); if (ret < 0) - dev_err(rt711->component->dev, + dev_err(&rt711->slave->dev, "Failed to get private value: %06x => %04x ret=%d\n", addr, *value, ret);