From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36614 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752456AbdFLJUc (ORCPT ); Mon, 12 Jun 2017 05:20:32 -0400 Subject: Patch "stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms" has been added to the 4.4-stable tree To: danielmicay@gmail.com, arjan@linux.intel.com, gregkh@linuxfoundation.org, keescook@chromium.org, mingo@kernel.org, peterz@infradead.org, riel@redhat.com, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Mon, 12 Jun 2017 11:19:28 +0200 Message-ID: <1497259168113227@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: stackprotector-increase-the-per-task-stack-canary-s-random-range-from-32-bits-to-64-bits-on-64-bit-platforms.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 Mon Sep 17 00:00:00 2001 From: Daniel Micay Date: Thu, 4 May 2017 09:32:09 -0400 Subject: stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms From: Daniel Micay commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 upstream. The stack canary is an 'unsigned long' and should be fully initialized to random data rather than only 32 bits of random data. Signed-off-by: Daniel Micay Acked-by: Arjan van de Ven Acked-by: Rik van Riel Acked-by: Kees Cook Cc: Arjan van Ven Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: kernel-hardening@lists.openwall.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170504133209.3053-1-danielmicay@gmail.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/fork.c +++ b/kernel/fork.c @@ -368,7 +368,7 @@ static struct task_struct *dup_task_stru set_task_stack_end_magic(tsk); #ifdef CONFIG_CC_STACKPROTECTOR - tsk->stack_canary = get_random_int(); + tsk->stack_canary = get_random_long(); #endif /* Patches currently in stable-queue which might be from danielmicay@gmail.com are queue-4.4/stackprotector-increase-the-per-task-stack-canary-s-random-range-from-32-bits-to-64-bits-on-64-bit-platforms.patch