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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00665C54EBE for ; Mon, 16 Jan 2023 17:00:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234145AbjAPRAh (ORCPT ); Mon, 16 Jan 2023 12:00:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234100AbjAPQ7x (ORCPT ); Mon, 16 Jan 2023 11:59:53 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9776D3D089 for ; Mon, 16 Jan 2023 08:42:41 -0800 (PST) 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 36DC861077 for ; Mon, 16 Jan 2023 16:42:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 49EB3C433EF; Mon, 16 Jan 2023 16:42:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887360; bh=OUgQ3YmlL+kC/xj82o2Oh7xprEho4Eb8CVEzeEQBe6k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tj6Vy7qVvDxhjGpg81V5rusUWIb3bS0URM7Hjm/TSR0DpNcK8Zq+36AZNHiEwx1dQ U1zD+WN6eN/3LK723i8/BAx+vc/wuHp1UTwFyiwgMPNwiaVmSWfMyyIvgT0Efa8Yy5 uI4wg/gUT2hYUNvMrtJUSEniELLw0BKHx46XLK/Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zeng Heng , Mark Brown , Sasha Levin Subject: [PATCH 4.19 102/521] ASoC: pxa: fix null-pointer dereference in filter() Date: Mon, 16 Jan 2023 16:46:04 +0100 Message-Id: <20230116154851.820551150@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Zeng Heng [ Upstream commit ec7bf231aaa1bdbcb69d23bc50c753c80fb22429 ] kasprintf() would return NULL pointer when kmalloc() fail to allocate. Need to check the return pointer before calling strcmp(). Fixes: 7a824e214e25 ("ASoC: mmp: add audio dma support") Signed-off-by: Zeng Heng Link: https://lore.kernel.org/r/20221114085629.1910435-1-zengheng4@huawei.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/pxa/mmp-pcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/pxa/mmp-pcm.c b/sound/soc/pxa/mmp-pcm.c index d2d4652de32c..5969aa66410d 100644 --- a/sound/soc/pxa/mmp-pcm.c +++ b/sound/soc/pxa/mmp-pcm.c @@ -90,7 +90,7 @@ static bool filter(struct dma_chan *chan, void *param) devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, dma_data->ssp_id); - if ((strcmp(dev_name(chan->device->dev), devname) == 0) && + if (devname && (strcmp(dev_name(chan->device->dev), devname) == 0) && (chan->chan_id == dma_data->dma_res->start)) { found = true; } -- 2.35.1