From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:41974 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751644AbbIOUno (ORCPT ); Tue, 15 Sep 2015 16:43:44 -0400 Subject: Patch "x86/ldt: Correct LDT access in single stepping logic" has been added to the 4.1-stable tree To: jgross@suse.com, gregkh@linuxfoundation.org, luto@kernel.org, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Tue, 15 Sep 2015 13:43:43 -0700 Message-ID: <144234982320458@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 x86/ldt: Correct LDT access in single stepping logic to the 4.1-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: x86-ldt-correct-ldt-access-in-single-stepping-logic.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 136d9d83c07c5e30ac49fc83b27e8c4842f108fc Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Thu, 6 Aug 2015 10:04:38 +0200 Subject: x86/ldt: Correct LDT access in single stepping logic From: Juergen Gross commit 136d9d83c07c5e30ac49fc83b27e8c4842f108fc upstream. Commit 37868fe113ff ("x86/ldt: Make modify_ldt synchronous") introduced a new struct ldt_struct anchored at mm->context.ldt. convert_ip_to_linear() was changed to reflect this, but indexing into the ldt has to be changed as the pointer is no longer void *. Signed-off-by: Juergen Gross Reviewed-by: Andy Lutomirski Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: bp@suse.de Link: http://lkml.kernel.org/r/1438848278-12906-1-git-send-email-jgross@suse.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/step.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/kernel/step.c +++ b/arch/x86/kernel/step.c @@ -28,11 +28,11 @@ unsigned long convert_ip_to_linear(struc struct desc_struct *desc; unsigned long base; - seg &= ~7UL; + seg >>= 3; mutex_lock(&child->mm->context.lock); if (unlikely(!child->mm->context.ldt || - (seg >> 3) >= child->mm->context.ldt->size)) + seg >= child->mm->context.ldt->size)) addr = -1L; /* bogus selector, access would fault */ else { desc = &child->mm->context.ldt->entries[seg]; Patches currently in stable-queue which might be from jgross@suse.com are queue-4.1/x86-ldt-correct-ldt-access-in-single-stepping-logic.patch queue-4.1/x86-ldt-correct-fpu-emulation-access-to-ldt.patch queue-4.1/x86-ldt-further-fix-fpu-emulation.patch