linux-kernel - [PATCH 07/20] nvram: drop useless access

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Message-Id: <20200509234557.1124086-7-viro@ZenIV.linux.org.uk>
Date:   Sun, 10 May 2020 00:45:44 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 07/20] nvram: drop useless access_ok()

From: Al Viro <viro@...iv.linux.org.uk>

we are using copy_to_user()/memdup_user() anyway

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 drivers/char/nvram.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 4667844eee69..8206412d25ba 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -232,8 +232,6 @@ static ssize_t nvram_misc_read(struct file *file, char __user *buf,
 	ssize_t ret;
 
 
-	if (!access_ok(buf, count))
-		return -EFAULT;
 	if (*ppos >= nvram_size)
 		return 0;
 
@@ -264,8 +262,6 @@ static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
 	char *tmp;
 	ssize_t ret;
 
-	if (!access_ok(buf, count))
-		return -EFAULT;
 	if (*ppos >= nvram_size)
 		return 0;
 
-- 
2.11.0