From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 4 Jun 2017 01:50:46 +0000 (-0400)
Subject: adb: get rid of pointless access_ok()
X-Git-Tag: v4.14-rc1~594^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5a5011936ec0ef22e9433cf2ee3520db4993b445;p=platform%2Fkernel%2Flinux-rpi.git

adb: get rid of pointless access_ok()

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

diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index fee939ef..039dc82 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -723,8 +723,6 @@ static ssize_t adb_read(struct file *file, char __user *buf,
 		return -EINVAL;
 	if (count > sizeof(req->reply))
 		count = sizeof(req->reply);
-	if (!access_ok(VERIFY_WRITE, buf, count))
-		return -EFAULT;
 
 	req = NULL;
 	spin_lock_irqsave(&state->lock, flags);
@@ -781,8 +779,6 @@ static ssize_t adb_write(struct file *file, const char __user *buf,
 		return -EINVAL;
 	if (adb_controller == NULL)
 		return -ENXIO;
-	if (!access_ok(VERIFY_READ, buf, count))
-		return -EFAULT;
 
 	req = kmalloc(sizeof(struct adb_request),
 					     GFP_KERNEL);