From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 842516FA0 for ; Mon, 16 Jan 2023 17:03:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 098ABC433D2; Mon, 16 Jan 2023 17:03:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673888619; bh=RLbFRT4rSWoiQiRKf7EjKZSZkzYA7nMG9LmlB6bnPs8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bfh5q7jimSF6RqRNSYydOgqNSJRKIh2vDD18AQ0/tgWWm/V7DTjmr7DNF+O+WBgqI Qpi7qMJ7rCcFNUXsa9lUeoAt+jIUWnkqW0if4yPgY7t2kop0f4RamUsRLPMvToTQBs GiC8zRpTUY6tK3Q5R6Qq/gF9jyj0RdNe68hk8sM4= 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 4.14 074/338] ASoC: pxa: fix null-pointer dereference in filter() Date: Mon, 16 Jan 2023 16:49:07 +0100 Message-Id: <20230116154824.110775740@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154820.689115727@linuxfoundation.org> References: <20230116154820.689115727@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 624d9bd5dadd..609843f607a3 100644 --- a/sound/soc/pxa/mmp-pcm.c +++ b/sound/soc/pxa/mmp-pcm.c @@ -88,7 +88,7 @@ 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