linux-kernel - [RFC][PATCH v2 2/8] sh: no need of access_ok() in arch_futex_atomic_op

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Message-Id: <20200327022836.881203-2-viro@ZenIV.linux.org.uk>
Date:   Fri, 27 Mar 2020 02:28:30 +0000
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC][PATCH v2 2/8] sh: no need of access_ok() in arch_futex_atomic_op_inuser()

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

everything it uses is doing access_ok() already

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 arch/sh/include/asm/futex.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/sh/include/asm/futex.h b/arch/sh/include/asm/futex.h
index 324fa680b13d..b39cda09fb95 100644
--- a/arch/sh/include/asm/futex.h
+++ b/arch/sh/include/asm/futex.h
@@ -34,9 +34,6 @@ static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval,
 	u32 oldval, newval, prev;
 	int ret;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
-
 	do {
 		ret = get_user(oldval, uaddr);
 
-- 
2.11.0