kernel/fork: always deny write access to current MM exe_file

[linux-2.6-microblaze.git] / fs / ecryptfs / main.c

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index cdf40a5..d66bbd2 100644 (file)
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-/**
+/*
  * eCryptfs: Linux filesystem encryption layer
  *
  * Copyright (C) 1997-2003 Erez Zadok
@@ -24,7 +24,7 @@
 #include <linux/magic.h>
 #include "ecryptfs_kernel.h"
 
-/**
+/*
  * Module parameter that defines the ecryptfs_verbosity level.
  */
 int ecryptfs_verbosity = 0;
@@ -34,7 +34,7 @@ MODULE_PARM_DESC(ecryptfs_verbosity,
                 "Initial verbosity level (0 or 1; defaults to "
                 "0, which is Quiet)");
 
-/**
+/*
  * Module parameter that defines the number of message buffer elements
  */
 unsigned int ecryptfs_message_buf_len = ECRYPTFS_DEFAULT_MSG_CTX_ELEMS;
@@ -43,7 +43,7 @@ module_param(ecryptfs_message_buf_len, uint, 0);
 MODULE_PARM_DESC(ecryptfs_message_buf_len,
                 "Number of message buffer elements");
 
-/**
+/*
  * Module parameter that defines the maximum guaranteed amount of time to wait
  * for a response from ecryptfsd.  The actual sleep time will be, more than
  * likely, a small amount greater than this specified value, but only less if
@@ -57,7 +57,7 @@ MODULE_PARM_DESC(ecryptfs_message_wait_timeout,
                 "sleep while waiting for a message response from "
                 "userspace");
 
-/**
+/*
  * Module parameter that is an estimate of the maximum number of users
  * that will be concurrently using eCryptfs. Set this to the right
  * value to balance performance and memory use.
@@ -80,7 +80,7 @@ void __ecryptfs_printk(const char *fmt, ...)
        va_end(args);
 }
 
-/**
+/*
  * ecryptfs_init_lower_file
  * @ecryptfs_dentry: Fully initialized eCryptfs dentry object, with
  *                   the lower dentry and the lower mount set
@@ -221,7 +221,7 @@ static void ecryptfs_init_mount_crypt_stat(
 
 /**
  * ecryptfs_parse_options
- * @sb: The ecryptfs super block
+ * @sbi: The ecryptfs super block
  * @options: The options passed to the kernel
  * @check_ruid: set to 1 if device uid should be checked against the ruid
  *
@@ -466,10 +466,10 @@ out:
 struct kmem_cache *ecryptfs_sb_info_cache;
 static struct file_system_type ecryptfs_fs_type;
 
-/**
- * ecryptfs_get_sb
- * @fs_type
- * @flags
+/*
+ * ecryptfs_mount
+ * @fs_type: The filesystem type that the superblock should belong to
+ * @flags: The flags associated with the mount
  * @dev_name: The path to mount over
  * @raw_data: The options passed into the kernel
  */
@@ -492,6 +492,12 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
                goto out;
        }
 
+       if (!dev_name) {
+               rc = -EINVAL;
+               err = "Device name cannot be null";
+               goto out;
+       }
+
        rc = ecryptfs_parse_options(sbi, raw_data, &check_ruid);
        if (rc) {
                err = "Error parsing options";
@@ -635,7 +641,7 @@ static struct file_system_type ecryptfs_fs_type = {
 };
 MODULE_ALIAS_FS("ecryptfs");
 
-/**
+/*
  * inode_info_init_once
  *
  * Initializes the ecryptfs_inode_info_cache when it is created