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 0E95C1C08 for ; Wed, 28 Dec 2022 16:31:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88FA0C433EF; Wed, 28 Dec 2022 16:31:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672245111; bh=MxP9Ca6ZRaaiDUdG1Bv32qDmM1KGnIdycsO7dqW+zb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c0PtRf8nGiDKWoq1GPSpcyMc/SsWXnQOdn08rbkYs0mTRVOTVOiKXqojuZBCNswZt D1hjPWHBO2/Sf4Uc2s4sX+ldRK37TnGC9WWpO0E1LhVHEixgBTWfvfcLgxedm1msJ4 nf3Q4TS33BbRrk4hG8dgenQbDqeUmgtyk2ZbdbRw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shang XiaoJing , Bjorn Andersson , Sasha Levin Subject: [PATCH 6.0 0821/1073] remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio() Date: Wed, 28 Dec 2022 15:40:09 +0100 Message-Id: <20221228144350.314802229@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@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: Shang XiaoJing [ Upstream commit f360e2b275efbb745ba0af8b47d9ef44221be586 ] q6v5_wcss_init_mmio() will call platform_get_resource_byname() that may fail and return NULL. devm_ioremap() will use res->start as input, which may causes null-ptr-deref. Check the ret value of platform_get_resource_byname() to avoid the null-ptr-deref. Fixes: 0af65b9b915e ("remoteproc: qcom: wcss: Add non pas wcss Q6 support for QCS404") Signed-off-by: Shang XiaoJing Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20221125021641.29392-1-shangxiaojing@huawei.com Signed-off-by: Sasha Levin --- drivers/remoteproc/qcom_q6v5_wcss.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c index bb0947f7770e..de232337e082 100644 --- a/drivers/remoteproc/qcom_q6v5_wcss.c +++ b/drivers/remoteproc/qcom_q6v5_wcss.c @@ -827,6 +827,9 @@ static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss, int ret; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6"); + if (!res) + return -EINVAL; + wcss->reg_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!wcss->reg_base) -- 2.35.1