From patchwork Wed May 5 17:08:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 12240647 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA71FC43619 for ; Wed, 5 May 2021 17:15:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C40B610FB for ; Wed, 5 May 2021 17:15:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237482AbhEEROB (ORCPT ); Wed, 5 May 2021 13:14:01 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:58048 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239040AbhEERKg (ORCPT ); Wed, 5 May 2021 13:10:36 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1620234579; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=2NJ2FCJ5eygsO7NmVQKBkrCnohRdJRzGE0EKHDhDgYA=; b=eVO2dj3NjJNlHQR73Rav4QC+tr0hdXzH9YlEzoRHV8t9ltQMxKVLK5ccMrni2EtPHf7UWgt3 YsmECZRgL3XsZqapqNsx7odo4alXZihxrGskmHrB8UXUAFMlED5FNR6omtimXi2jk9M6q4sL Z5OiP3sHCknur06s7byaC6kbkkM= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n01.prod.us-west-2.postgun.com with SMTP id 6092d1398807bcde1d132856 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 05 May 2021 17:09:13 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 567ABC00A28; Wed, 5 May 2021 17:09:13 +0000 (UTC) Received: from malabar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id A7CD9C43143; Wed, 5 May 2021 17:08:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A7CD9C43143 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, loic.poulain@linaro.org, linux-wireless@vger.kernel.org, kvalo@codeaurora.org, ath11k@lists.infradead.org, Bhaumik Bhatt Subject: [PATCH v3 6/6] bus: mhi: core: Add range checks for BHI and BHIe Date: Wed, 5 May 2021 10:08:21 -0700 Message-Id: <1620234501-30461-7-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1620234501-30461-1-git-send-email-bbhatt@codeaurora.org> References: <1620234501-30461-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org When obtaining the BHI or BHIe offsets during the power up preparation phase, range checks are missing. These can help controller drivers avoid accessing any address outside of the MMIO region. Ensure that mhi_cntrl->reg_len is set before MHI registration as it is a required field and range checks will fail without it. Signed-off-by: Bhaumik Bhatt Reviewed-by: Jeffrey Hugo --- drivers/bus/mhi/core/init.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 1cc2f22..86ad06e 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -885,7 +885,8 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, if (!mhi_cntrl || !mhi_cntrl->cntrl_dev || !mhi_cntrl->regs || !mhi_cntrl->runtime_get || !mhi_cntrl->runtime_put || !mhi_cntrl->status_cb || !mhi_cntrl->read_reg || - !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || !mhi_cntrl->irq) + !mhi_cntrl->write_reg || !mhi_cntrl->nr_irqs || + !mhi_cntrl->irq || !mhi_cntrl->reg_len) return -EINVAL; ret = parse_config(mhi_cntrl, config); @@ -1077,6 +1078,12 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl) dev_err(dev, "Error getting BHI offset\n"); goto error_reg_offset; } + + if (bhi_off >= mhi_cntrl->reg_len) { + dev_err(dev, "BHI offset is out of range\n"); + ret = -EINVAL; + goto error_reg_offset; + } mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off; if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) { @@ -1086,6 +1093,12 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl) dev_err(dev, "Error getting BHIE offset\n"); goto error_reg_offset; } + + if (bhie_off >= mhi_cntrl->reg_len) { + dev_err(dev, "BHIe offset is out of range\n"); + ret = -EINVAL; + goto error_reg_offset; + } mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off; }