From nobody Sat Feb 7 03:44:49 2026 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 67C21C25B0D for ; Tue, 16 Aug 2022 04:43:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231808AbiHPEnb (ORCPT ); Tue, 16 Aug 2022 00:43:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232007AbiHPEkp (ORCPT ); Tue, 16 Aug 2022 00:40:45 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4640A50DF; Mon, 15 Aug 2022 13:31:56 -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 ams.source.kernel.org (Postfix) with ESMTPS id 8F25BB80EA8; Mon, 15 Aug 2022 20:31:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DAC25C433D6; Mon, 15 Aug 2022 20:31:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660595514; bh=Vi5nOn57Hq/yjy93n2CxGZ9yBwsNUVNFG9Sh/CociKg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rMyf8akShDbN7TfyTmnyRdZBGDADNsXcyH9tMFTFUUI38c5oENYs5nxm8JSltyB6G cMqtZpHNFGKEx8tfyrjYZzqACHstqEZbGYOsHMv2mFh7Z2Q+CDCVLLKb0qI2WLJyAc JSSaMHGki+ZFMkXQ8FFTaxlx4U1azQYQbRP3NUXw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Shevchenko , Jiasheng Jiang , Alexander Shishkin , Sasha Levin Subject: [PATCH 5.19 0787/1157] intel_th: msu-sink: Potential dereference of null pointer Date: Mon, 15 Aug 2022 20:02:23 +0200 Message-Id: <20220815180510.969405483@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180439.416659447@linuxfoundation.org> References: <20220815180439.416659447@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Jiasheng Jiang [ Upstream commit 82f76a4a720791d889de775b5f7541d601efc8bd ] The return value of dma_alloc_coherent() needs to be checked. To avoid use of null pointer in sg_set_buf() in case of the failure of alloc. Fixes: f220df66f676 ("intel_th: msu-sink: An example msu buffer "sink"") Reviewed-by: Andy Shevchenko Signed-off-by: Jiasheng Jiang Signed-off-by: Alexander Shishkin Link: https://lore.kernel.org/r/20220705082637.59979-3-alexander.shishkin@l= inux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/hwtracing/intel_th/msu-sink.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/hwtracing/intel_th/msu-sink.c b/drivers/hwtracing/inte= l_th/msu-sink.c index 2c7f5116be12..891b28ea25fe 100644 --- a/drivers/hwtracing/intel_th/msu-sink.c +++ b/drivers/hwtracing/intel_th/msu-sink.c @@ -71,6 +71,9 @@ static int msu_sink_alloc_window(void *data, struct sg_ta= ble **sgt, size_t size) block =3D dma_alloc_coherent(priv->dev->parent->parent, PAGE_SIZE, &sg_dma_address(sg_ptr), GFP_KERNEL); + if (!block) + return -ENOMEM; + sg_set_buf(sg_ptr, block, PAGE_SIZE); } =20 --=20 2.35.1