From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756491AbcECUjq (ORCPT ); Tue, 3 May 2016 16:39:46 -0400 Received: from mail-yw0-f175.google.com ([209.85.161.175]:33202 "EHLO mail-yw0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756389AbcECUjp (ORCPT ); Tue, 3 May 2016 16:39:45 -0400 From: Kangjie Lu X-Google-Original-From: Kangjie Lu To: akpm@linux-foundation.org Cc: oleg@redhat.com, peterz@infradead.org, amanieu@gmail.com, linux-kernel@vger.kernel.org, taesoo@gatech.edu, insu@gatech.edu, Kangjie Lu Subject: [PATCH] infoleak fix2 in signal Date: Tue, 3 May 2016 16:42:46 -0400 Message-Id: <1462308166-6126-1-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 “info” has a total size of 128 bytes; however, only 32 bytes are initialized. The remaining uninitialized bytes are sent to userland via send_signal. Signed-off-by: Kangjie Lu --- kernel/signal.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/signal.c b/kernel/signal.c index f40f0b3..26fdb74 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1689,6 +1689,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, parent = tsk->real_parent; } + memset(&info, 0, sizeof(info)); info.si_signo = SIGCHLD; info.si_errno = 0; /* -- 1.9.1