From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754899AbdBETfM (ORCPT + 2 others); Sun, 5 Feb 2017 14:35:12 -0500 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:28539 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754802AbdBET24 (ORCPT ); Sun, 5 Feb 2017 14:28:56 -0500 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Al Viro , Willy Tarreau Subject: [PATCH 3.10 087/319] sh: fix copy_from_user() Date: Sun, 5 Feb 2017 20:21:14 +0100 Message-Id: <1486322486-8024-58-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1486322486-8024-1-git-send-email-w@1wt.eu> References: <1486322486-8024-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Al Viro commit 6e050503a150b2126620c1a1e9b3a368fcd51eac upstream. Signed-off-by: Al Viro Signed-off-by: Willy Tarreau --- arch/sh/include/asm/uaccess.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h index 9486376..c04cc18 100644 --- a/arch/sh/include/asm/uaccess.h +++ b/arch/sh/include/asm/uaccess.h @@ -151,7 +151,10 @@ copy_from_user(void *to, const void __user *from, unsigned long n) __kernel_size_t __copy_size = (__kernel_size_t) n; if (__copy_size && __access_ok(__copy_from, __copy_size)) - return __copy_user(to, from, __copy_size); + __copy_size = __copy_user(to, from, __copy_size); + + if (unlikely(__copy_size)) + memset(to + (n - __copy_size), 0, __copy_size); return __copy_size; } -- 2.8.0.rc2.1.gbe9624a