linux-kernel - [PATCH 3.10 097/319] sparc32: fix copy_from

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Message-Id: <1486322486-8024-68-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:21:24 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Al Viro <viro@...iv.linux.org.uk>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 097/319] sparc32: fix copy_from_user()

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

commit 917400cecb4b52b5cde5417348322bb9c8272fa6 upstream.

Acked-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Willy Tarreau <w@....eu>
---
 arch/sparc/include/asm/uaccess_32.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index 53a28dd..01f6028 100644
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -265,8 +265,10 @@ static inline unsigned long copy_from_user(void *to, const void __user *from, un
 {
 	if (n && __access_ok((unsigned long) from, n))
 		return __copy_user((__force void __user *) to, from, n);
-	else
+	else {
+		memset(to, 0, n);
 		return n;
+	}
 }
 
 static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
-- 
2.8.0.rc2.1.gbe9624a