From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 23 Apr 2020 14:20:06 +0000 (-0400)
Subject: tomoyo_write_control(): get rid of pointless access_ok()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=00fca6b53a88f600c59bae3828e1c2fdce58be0d;p=linux.git

tomoyo_write_control(): get rid of pointless access_ok()

address is passed only to get_user()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 1b467381986f7..f93f8acd05f76 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -2662,8 +2662,6 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
 
 	if (!head->write)
 		return -EINVAL;
-	if (!access_ok(buffer, buffer_len))
-		return -EFAULT;
 	if (mutex_lock_interruptible(&head->io_sem))
 		return -EINTR;
 	head->read_user_buf_avail = 0;