sparc32: fix copy_from_user()

[ Upstream commit 917400cecb4b52b5cde5417348322bb9c8272fa6 ]

Cc: stable@vger.kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index 64ee103dc29da142305d93d26fd44cf4a62ae699..dfb542c7cc714ea5b5cf19d6d3f853cb1a9c08ed 100644 (file)
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -328,8 +328,10 @@ 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)