From patchwork Tue Apr 16 02:20:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13631098 Received: from mail-lj1-f180.google.com (mail-lj1-f180.google.com [209.85.208.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C156F11C83 for ; Tue, 16 Apr 2024 02:20:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713234059; cv=none; b=CyPCl1xu/ZER2e+fGYzUtCGZjb7wigmMfKDrCrJnSN7u/7fRHm6Xv4kZ41YLhtP13qyOd6Cf4xm+2XphmadfHSHlMhqS+oGOoMblZPIRAaot2lmHeJaI2iJ41fadC5Tbx6sMwG6hBwN38XZ/XSjZVRc3imgq7kczJTDi3qYGX3k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713234059; c=relaxed/simple; bh=FEyCX9wXX7I+ebE4NBge8ISHoFDJTvUbCdS4OCDrmww=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=iuTjyCO44jkF50qh4sIkaC9RXhqU3AfoRpfDgc/0czyxo1U3j6eu+m3FvROXRrdDUslvY9MZabIyeckuxMQxidfdYYYX7s1FlTwYdFFzk0xeB/HlJ4Dsm58HWIw0S282Z11aUQL+YDTg3VojfmHGDfWOWA1TrmjojNI+EXDSeVw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=qGwSVlBU; arc=none smtp.client-ip=209.85.208.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="qGwSVlBU" Received: by mail-lj1-f180.google.com with SMTP id 38308e7fff4ca-2da68af6c6fso23291571fa.3 for ; Mon, 15 Apr 2024 19:20:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1713234056; x=1713838856; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=IEN6gNaEJq5cDx0aVqzfzS7okuKcQO2J6EAa15VU8ZU=; b=qGwSVlBUe8GqiMHwN3I+yXMuSv3ByV+oqE1VUWT4KxlyZTvSDxrnHXlX/KXJn8CtsB TdRNCGuTt61HtgaWuuYpNOSF+Xdcg06fNnLEXACGwwNw+TznjkVYNZfgkUoFqWMufTvZ hZk3sC9vMDSLc2OLvkB4mxFfP9KVERJGomprWeuQ9zyOI0ExSU7szpuStSbp3iCnMB8t T+rYad+Ecth3BeW0VxoRu+oYg/GUXmqxkPLu1V2+XxPMmeMTH871XY4Ppa1mCbo5Lflm thQRiDDkZWP1jyAvA+RY/zTgF6KVBXfpr0lVndZJ0KX8GZ3wgJRIM/SIMQgLRGvaFYmJ 4EKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713234056; x=1713838856; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=IEN6gNaEJq5cDx0aVqzfzS7okuKcQO2J6EAa15VU8ZU=; b=atTzy3701NvcjiZ+fgkfWwvbagDxBDETJYcc4um/l8A4rGM34PPswsZZ3noQxkaY38 72IE5koHcLUIlmiN6fCaQKfLkXkFd5SQCeverCZRJAqAGn5gllMZp+GN1YcuLUuZI1sG t4j9gPHuD4vTUvw1SE1LVn9MT2C4Dng1W1JRTdkQolwszG4zYeB1JBX4CdLNjiSrf2Zu 09UIGuB1FNXRNYGLdPQ6avkLNFxKkuqjvw7iBKUBCPaNeXb4hpolp55uBi3+xnNvesio shXuAZU8L06stMGj/+d1HuSrgq9rhOakRiuYTHEQLvBU9mQLw9erNtOTCep6aiStLi6F qsMA== X-Forwarded-Encrypted: i=1; AJvYcCXUZOt2/GMu1De77NxZ7uextTJWAZoHrJRdb/zjQBIE+UK8sD/dNUzXs3QVF0+9xf5ApOSYIMCqCVua2zM7bTet3ewOi0rH+q26OvPK/w== X-Gm-Message-State: AOJu0YzISCcaiik4x1+/0dUeVEwFGS/8LGrP3q1vWo2DH7BJXgJVwwot vih41qu9ZsDa0jV/CWwx/EqU/+XhD9L5fv4M+uoDX5Hcln3Ki8gzSt0PSfHrg9k= X-Google-Smtp-Source: AGHT+IFL7IrVBHPTv1LgRZ4ESfzG16wzd1vNSfA94Y8QxyLSBT8T51y2c97hwR2jkhlTVWWF3wOgQg== X-Received: by 2002:a05:6512:3e22:b0:519:2828:c284 with SMTP id i34-20020a0565123e2200b005192828c284mr57429lfv.65.1713234055797; Mon, 15 Apr 2024 19:20:55 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id bi30-20020a0565120e9e00b0051925dd92dbsm27716lfb.214.2024.04.15.19.20.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 19:20:55 -0700 (PDT) From: Dmitry Baryshkov Date: Tue, 16 Apr 2024 05:20:52 +0300 Subject: [PATCH 3/8] usb: typec: ucsi: glink: check message data sizes Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240416-ucsi-glink-altmode-v1-3-890db00877ac@linaro.org> References: <20240416-ucsi-glink-altmode-v1-0-890db00877ac@linaro.org> In-Reply-To: <20240416-ucsi-glink-altmode-v1-0-890db00877ac@linaro.org> To: Heikki Krogerus , Greg Kroah-Hartman , Neil Armstrong , Bjorn Andersson , Konrad Dybcio Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Dmitry Baryshkov X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1878; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=FEyCX9wXX7I+ebE4NBge8ISHoFDJTvUbCdS4OCDrmww=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmHeCDyDUMWBWYk0gH++Zypzj2AuGdC1dtEEyG1 i8J+qSX6X6JATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZh3ggwAKCRCLPIo+Aiko 1UnmB/9C6LgvEN5vlv4FV4KyUXh/Qm3xcNhF7b9Qee/PBlum0vNEv/px1OSKHvpwdUOqw9Ns5UL YfMIP8DhSpJ6gX7UGEMBQ0jDqmaBXcPZsW9nAy9mM5TH3v/Q+0FdeOXqlqTutkW6atyzrGPTa4u uFtUAr1gGHZZ3Bo69LwFh0qvqMNC9UaVjFpaA4Xj21Zs9AH/rK7HyDq5hVwzN7C4fGBNTGCW2oX WXCP8V6z0lThViLk9OxTNwfJBj4BVUYYmWTNgoTCMLpwkJRQxysh/t8SJDi0qJefzuVJcKKfvnQ 8gYiClPwaqnJub6o4pQf9cAPF8zEVKgkArSFTE/NDFgxUeaT X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A The driver gets data from the DSP firmware. Sanitize data size before reading corresponding message structures. Fixes: 62b5412b1f4a ("usb: typec: ucsi: add PMIC Glink UCSI driver") Signed-off-by: Dmitry Baryshkov --- drivers/usb/typec/ucsi/ucsi_glink.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/ucsi_glink.c index f7546bb488c3..6be9d89d4a28 100644 --- a/drivers/usb/typec/ucsi/ucsi_glink.c +++ b/drivers/usb/typec/ucsi/ucsi_glink.c @@ -223,9 +223,16 @@ static const struct ucsi_operations pmic_glink_ucsi_ops = { .connector_status = pmic_glink_ucsi_connector_status, }; -static void pmic_glink_ucsi_read_ack(struct pmic_glink_ucsi *ucsi, const void *data, int len) +static void pmic_glink_ucsi_read_ack(struct pmic_glink_ucsi *ucsi, const void *data, size_t len) { - const struct ucsi_read_buf_resp_msg *resp = data; + const struct ucsi_read_buf_resp_msg *resp; + + if (len != sizeof (*resp)) { + dev_err_ratelimited(ucsi->dev, "Unexpected read response struct size %zd\n", len); + return; + } + + resp = data; if (resp->ret_code) return; @@ -234,9 +241,16 @@ static void pmic_glink_ucsi_read_ack(struct pmic_glink_ucsi *ucsi, const void *d complete(&ucsi->read_ack); } -static void pmic_glink_ucsi_write_ack(struct pmic_glink_ucsi *ucsi, const void *data, int len) +static void pmic_glink_ucsi_write_ack(struct pmic_glink_ucsi *ucsi, const void *data, size_t len) { - const struct ucsi_write_buf_resp_msg *resp = data; + const struct ucsi_write_buf_resp_msg *resp; + + if (len != sizeof (*resp)) { + dev_err_ratelimited(ucsi->dev, "Unexpected write ack struct size %zd\n", len); + return; + } + + resp = data; if (resp->ret_code) return;