TOMOYO: Remove usage counter for temporary memory.

TOMOYO was using own memory usage counter for detecting memory leak.
But as kernel 2.6.31 introduced memory leak detection mechanism
( CONFIG_DEBUG_KMEMLEAK ), we no longer need to have own counter.

We remove usage counter for memory used for permission checks, but we keep
usage counter for memory used for policy so that we can apply quota.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 11 insertions, 11 deletions

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index e331e699cf5..ef6622300a8 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -750,7 +750,7 @@ bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
  *
  * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
  *
- * This function uses tomoyo_alloc(), so the caller must call tomoyo_free()
+ * This function uses kzalloc(), so the caller must call kfree()
  * if this function didn't return NULL.
  */
 static const char *tomoyo_get_exe(void)
@@ -1248,7 +1248,7 @@ static bool tomoyo_is_policy_manager(void)
 			last_pid = pid;
 		}
 	}
-	tomoyo_free(exe);
+	kfree(exe);
 	return found;
 }
 
@@ -1931,7 +1931,7 @@ static int tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
  */
 static int tomoyo_open_control(const u8 type, struct file *file)
 {
-	struct tomoyo_io_buffer *head = tomoyo_alloc(sizeof(*head));
+	struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_KERNEL);
 
 	if (!head)
 		return -ENOMEM;
@@ -1992,9 +1992,9 @@ static int tomoyo_open_control(const u8 type, struct file *file)
 	} else {
 		if (!head->readbuf_size)
 			head->readbuf_size = 4096 * 2;
-		head->read_buf = tomoyo_alloc(head->readbuf_size);
+		head->read_buf = kzalloc(head->readbuf_size, GFP_KERNEL);
 		if (!head->read_buf) {
-			tomoyo_free(head);
+			kfree(head);
 			return -ENOMEM;
 		}
 	}
@@ -2006,10 +2006,10 @@ static int tomoyo_open_control(const u8 type, struct file *file)
 		head->write = NULL;
 	} else if (head->write) {
 		head->writebuf_size = 4096 * 2;
-		head->write_buf = tomoyo_alloc(head->writebuf_size);
+		head->write_buf = kzalloc(head->writebuf_size, GFP_KERNEL);
 		if (!head->write_buf) {
-			tomoyo_free(head->read_buf);
-			tomoyo_free(head);
+			kfree(head->read_buf);
+			kfree(head);
 			return -ENOMEM;
 		}
 	}
@@ -2141,11 +2141,11 @@ static int tomoyo_close_control(struct file *file)
 
 	tomoyo_read_unlock(head->reader_idx);
 	/* Release memory used for policy I/O. */
-	tomoyo_free(head->read_buf);
+	kfree(head->read_buf);
 	head->read_buf = NULL;
-	tomoyo_free(head->write_buf);
+	kfree(head->write_buf);
 	head->write_buf = NULL;
-	tomoyo_free(head);
+	kfree(head);
 	head = NULL;
 	file->private_data = NULL;
 	return 0;