[PATCH 05/20] tomoyo_write_control(): get rid of pointless access_ok()

From: Al Viro
Date: Sat May 09 2020 - 19:46:22 EST


From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

address is passed only to get_user()

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
security/tomoyo/common.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 1b467381986f..f93f8acd05f7 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;
--
2.11.0