From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 25 Apr 2020 22:01:30 +0000 (-0400)
Subject: default csum_and_copy_to_user(): don't bother with access_ok()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=001c1a655f0a4e4ebe5d9beb47466dc5c6ab4871;p=linux.git

default csum_and_copy_to_user(): don't bother with access_ok()

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

diff --git a/include/net/checksum.h b/include/net/checksum.h
index 5f9c73c0eeb91..46754ba9d7b70 100644
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -38,10 +38,8 @@ static __inline__ __wsum csum_and_copy_to_user
 {
 	sum = csum_partial(src, len, sum);
 
-	if (access_ok(dst, len)) {
-		if (copy_to_user(dst, src, len) == 0)
-			return sum;
-	}
+	if (copy_to_user(dst, src, len) == 0)
+		return sum;
 	if (len)
 		*err_ptr = -EFAULT;