From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756495AbcECUdK (ORCPT ); Tue, 3 May 2016 16:33:10 -0400 Received: from mail-yw0-f177.google.com ([209.85.161.177]:33476 "EHLO mail-yw0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756181AbcECUdI (ORCPT ); Tue, 3 May 2016 16:33:08 -0400 From: Kangjie Lu X-Google-Original-From: Kangjie Lu To: catalin.marinas@arm.com Cc: will.deacon@arm.com, james.morse@arm.com, linux-kernel@vger.kernel.org, Kangjie Lu Subject: [PATCH] fix infoleak in mm Date: Tue, 3 May 2016 16:36:08 -0400 Message-Id: <1462307768-5929-1-git-send-email-kjlu@gatech.edu> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The stack object “si” has a total size of 128; however, only 20 bytes are initialized. The remaining uninitialized bytes are sent to userland via send_signal Signed-off-by: Kangjie Lu --- arch/arm64/mm/fault.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 95df28b..f790eda 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -117,6 +117,7 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr, { struct siginfo si; + memset(&si, 0, sizeof(si)); if (unhandled_signal(tsk, sig) && show_unhandled_signals_ratelimited()) { pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n", tsk->comm, task_pid_nr(tsk), fault_name(esr), sig, -- 1.9.1