From patchwork Mon May 16 19:36:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573294 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 2C4CCC38A2E for ; Mon, 16 May 2022 20:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348418AbiEPUGe (ORCPT ); Mon, 16 May 2022 16:06:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348317AbiEPT6d (ORCPT ); Mon, 16 May 2022 15:58:33 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2638F40912; Mon, 16 May 2022 12:50:30 -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 B2F9C60DDA; Mon, 16 May 2022 19:50:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8D47C34100; Mon, 16 May 2022 19:50:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652730629; bh=omJeBGX28SkPxdoJonDoRUB1KOVyZzromm7NoJwczQ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T81iD2onKp32+92ibBRMrpDS6aSAZhzziQ8ogF+KY/k6GiDoYRtKono+o3GcQ3JHC +TfiJF76HRru5e9RSsg4i2OeBHiCEWzbEE6IR89isCWNbYZhJVPpwDvaCXUfHANmJa /Gt5Ag5s68W4bpYojmlX/cJ8BV9Mgj1gVyv1n/mk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ranjani Sridharan , Ajit Kumar Pandey , Pierre-Louis Bossart , Mark Brown , Sasha Levin Subject: [PATCH 5.15 052/102] ASoC: SOF: Fix NULL pointer exception in sof_pci_probe callback Date: Mon, 16 May 2022 21:36:26 +0200 Message-Id: <20220516193625.490547866@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193623.989270214@linuxfoundation.org> References: <20220516193623.989270214@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ajit Kumar Pandey [ Upstream commit c61711c1c95791850be48dd65a1d72eb34ba719f ] We are accessing "desc->ops" in sof_pci_probe without checking "desc" pointer. This results in NULL pointer exception if pci_id->driver_data i.e desc pointer isn't defined in sof device probe: BUG: kernel NULL pointer dereference, address: 0000000000000060 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:sof_pci_probe+0x1e/0x17f [snd_sof_pci] Code: Unable to access opcode bytes at RIP 0xffffffffc043dff4. RSP: 0018:ffffac4b03b9b8d8 EFLAGS: 00010246 Add NULL pointer check for sof_dev_desc pointer to avoid such exception. Reviewed-by: Ranjani Sridharan Signed-off-by: Ajit Kumar Pandey Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20220426183357.102155-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sof/sof-pci-dev.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/sound/soc/sof/sof-pci-dev.c b/sound/soc/sof/sof-pci-dev.c index bc9e70765678..b773289c928d 100644 --- a/sound/soc/sof/sof-pci-dev.c +++ b/sound/soc/sof/sof-pci-dev.c @@ -129,6 +129,11 @@ int sof_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) dev_dbg(&pci->dev, "PCI DSP detected"); + if (!desc) { + dev_err(dev, "error: no matching PCI descriptor\n"); + return -ENODEV; + } + if (!desc->ops) { dev_err(dev, "error: no matching PCI descriptor ops\n"); return -ENODEV;