1 files changed, 25 insertions, 58 deletions

diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
index 1d877cc9af97..0818bb517805 100644
--- a/drivers/char/tpm/tpm_vtpm_proxy.c
+++ b/drivers/char/tpm/tpm_vtpm_proxy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2015, 2016 IBM Corporation
  * Copyright (C) 2016 Intel Corporation
@@ -7,12 +8,6 @@
  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
  *
  * Device driver for vTPM (vTPM proxy driver)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
  */
 
 #include <linux/types.h>
@@ -96,7 +91,7 @@ static ssize_t vtpm_proxy_fops_read(struct file *filp, char __user *buf,
 
 	len = proxy_dev->req_len;
 
-	if (count < len) {
+	if (count < len || len > sizeof(proxy_dev->buffer)) {
 		mutex_unlock(&proxy_dev->buf_lock);
 		pr_debug("Invalid size in recv: count=%zd, req_len=%zd\n",
 			 count, len);
@@ -173,22 +168,22 @@ static ssize_t vtpm_proxy_fops_write(struct file *filp, const char __user *buf,
  *
  * Return: Poll flags
  */
-static unsigned int vtpm_proxy_fops_poll(struct file *filp, poll_table *wait)
+static __poll_t vtpm_proxy_fops_poll(struct file *filp, poll_table *wait)
 {
 	struct proxy_dev *proxy_dev = filp->private_data;
-	unsigned ret;
+	__poll_t ret;
 
 	poll_wait(filp, &proxy_dev->wq, wait);
 
-	ret = POLLOUT;
+	ret = EPOLLOUT;
 
 	mutex_lock(&proxy_dev->buf_lock);
 
 	if (proxy_dev->req_len)
-		ret |= POLLIN | POLLRDNORM;
+		ret |= EPOLLIN | EPOLLRDNORM;
 
 	if (!(proxy_dev->state & STATE_OPENED_FLAG))
-		ret |= POLLHUP;
+		ret |= EPOLLHUP;
 
 	mutex_unlock(&proxy_dev->buf_lock);
 
@@ -248,7 +243,6 @@ static int vtpm_proxy_fops_release(struct inode *inode, struct file *filp)
 
 static const struct file_operations vtpm_proxy_fops = {
 	.owner = THIS_MODULE,
-	.llseek = no_llseek,
 	.read = vtpm_proxy_fops_read,
 	.write = vtpm_proxy_fops_write,
 	.poll = vtpm_proxy_fops_poll,
@@ -303,9 +297,9 @@ out:
 static int vtpm_proxy_is_driver_command(struct tpm_chip *chip,
 					u8 *buf, size_t count)
 {
-	struct tpm_input_header *hdr = (struct tpm_input_header *)buf;
+	struct tpm_header *hdr = (struct tpm_header *)buf;
 
-	if (count < sizeof(struct tpm_input_header))
+	if (count < sizeof(struct tpm_header))
 		return 0;
 
 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
@@ -327,15 +321,16 @@ static int vtpm_proxy_is_driver_command(struct tpm_chip *chip,
  *
  * @chip: tpm chip to use
  * @buf: send buffer
+ * @bufsiz: size of the buffer
  * @count: bytes to send
  *
  * Return:
  *      0 in case of success, negative error value otherwise.
  */
-static int vtpm_proxy_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t count)
+static int vtpm_proxy_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t bufsiz,
+				  size_t count)
 {
 	struct proxy_dev *proxy_dev = dev_get_drvdata(&chip->dev);
-	int rc = 0;
 
 	if (count > sizeof(proxy_dev->buffer)) {
 		dev_err(&chip->dev,
@@ -366,7 +361,7 @@ static int vtpm_proxy_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t count)
 
 	wake_up_interruptible(&proxy_dev->wq);
 
-	return rc;
+	return 0;
 }
 
 static void vtpm_proxy_tpm_op_cancel(struct tpm_chip *chip)
@@ -402,7 +397,7 @@ static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality)
 {
 	struct tpm_buf buf;
 	int rc;
-	const struct tpm_output_header *header;
+	const struct tpm_header *header;
 	struct proxy_dev *proxy_dev = dev_get_drvdata(&chip->dev);
 
 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
@@ -417,9 +412,7 @@ static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality)
 
 	proxy_dev->state |= STATE_DRIVER_COMMAND;
 
-	rc = tpm_transmit_cmd(chip, NULL, buf.data, tpm_buf_length(&buf), 0,
-			      TPM_TRANSMIT_UNLOCKED | TPM_TRANSMIT_RAW,
-			      "attempting to set locality");
+	rc = tpm_transmit_cmd(chip, &buf, 0, "attempting to set locality");
 
 	proxy_dev->state &= ~STATE_DRIVER_COMMAND;
 
@@ -428,7 +421,7 @@ static int vtpm_proxy_request_locality(struct tpm_chip *chip, int locality)
 		goto out;
 	}
 
-	header = (const struct tpm_output_header *)buf.data;
+	header = (const struct tpm_header *)buf.data;
 	rc = be32_to_cpu(header->return_code);
 	if (rc)
 		locality = -1;
@@ -678,20 +671,10 @@ static long vtpmx_fops_ioctl(struct file *f, unsigned int ioctl,
 	}
 }
 
-#ifdef CONFIG_COMPAT
-static long vtpmx_fops_compat_ioctl(struct file *f, unsigned int ioctl,
-					  unsigned long arg)
-{
-	return vtpmx_fops_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
-}
-#endif
-
 static const struct file_operations vtpmx_fops = {
 	.owner = THIS_MODULE,
 	.unlocked_ioctl = vtpmx_fops_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = vtpmx_fops_compat_ioctl,
-#endif
+	.compat_ioctl = compat_ptr_ioctl,
 	.llseek = noop_llseek,
 };
 
@@ -701,37 +684,21 @@ static struct miscdevice vtpmx_miscdev = {
 	.fops = &vtpmx_fops,
 };
 
-static int vtpmx_init(void)
-{
-	return misc_register(&vtpmx_miscdev);
-}
-
-static void vtpmx_cleanup(void)
-{
-	misc_deregister(&vtpmx_miscdev);
-}
-
 static int __init vtpm_module_init(void)
 {
 	int rc;
 
-	rc = vtpmx_init();
-	if (rc) {
-		pr_err("couldn't create vtpmx device\n");
-		return rc;
-	}
-
 	workqueue = create_workqueue("tpm-vtpm");
 	if (!workqueue) {
 		pr_err("couldn't create workqueue\n");
-		rc = -ENOMEM;
-		goto err_vtpmx_cleanup;
+		return -ENOMEM;
 	}
 
-	return 0;
-
-err_vtpmx_cleanup:
-	vtpmx_cleanup();
+	rc = misc_register(&vtpmx_miscdev);
+	if (rc) {
+		pr_err("couldn't create vtpmx device\n");
+		destroy_workqueue(workqueue);
+	}
 
 	return rc;
 }
@@ -739,13 +706,13 @@ err_vtpmx_cleanup:
 static void __exit vtpm_module_exit(void)
 {
 	destroy_workqueue(workqueue);
-	vtpmx_cleanup();
+	misc_deregister(&vtpmx_miscdev);
 }
 
 module_init(vtpm_module_init);
 module_exit(vtpm_module_exit);
 
-MODULE_AUTHOR("Stefan Berger (stefanb@us.ibm.com)");
+MODULE_AUTHOR("Stefan Berger <stefanb@us.ibm.com>");
 MODULE_DESCRIPTION("vTPM Driver");
 MODULE_VERSION("0.1");
 MODULE_LICENSE("GPL");