From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 18 Feb 2020 17:19:23 +0000 (-0500)
Subject: generic arch_futex_atomic_op_inuser() doesn't need access_ok()
X-Git-Tag: v5.7-rc1~181^2~4^2~1
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a251b2d513ea4116ddb5487610e4b4048c7aa397;p=users%2Fhch%2Fmisc.git

generic arch_futex_atomic_op_inuser() doesn't need access_ok()

uses get_user() and put_user() for memory accesses

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

diff --git a/include/asm-generic/futex.h b/include/asm-generic/futex.h
index 3eab7ba912fc..f4c3470480c7 100644
--- a/include/asm-generic/futex.h
+++ b/include/asm-generic/futex.h
@@ -33,8 +33,6 @@ arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr)
 	int oldval, ret;
 	u32 tmp;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
 	preempt_disable();
 
 	ret = -EFAULT;