From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:59728 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934585AbdCLRiP (ORCPT ); Sun, 12 Mar 2017 13:38:15 -0400 Subject: Patch "s390: TASK_SIZE for kernel threads" has been added to the 4.4-stable tree To: schwidefsky@de.ibm.com, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 12 Mar 2017 17:29:04 +0100 Message-ID: <1489336144247158@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 s390: TASK_SIZE for kernel threads 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: s390-task_size-for-kernel-threads.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 fb94a687d96c570d46332a4a890f1dcb7310e643 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 24 Feb 2017 07:43:51 +0100 Subject: s390: TASK_SIZE for kernel threads From: Martin Schwidefsky commit fb94a687d96c570d46332a4a890f1dcb7310e643 upstream. Return a sensible value if TASK_SIZE if called from a kernel thread. This gets us around an issue with copy_mount_options that does a magic size calculation "TASK_SIZE - (unsigned long)data" while in a kernel thread and data pointing to kernel space. Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/include/asm/processor.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -74,7 +74,8 @@ extern void execve_tail(void); * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. */ -#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit) +#define TASK_SIZE_OF(tsk) ((tsk)->mm ? \ + (tsk)->mm->context.asce_limit : TASK_MAX_SIZE) #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \ (1UL << 30) : (1UL << 41)) #define TASK_SIZE TASK_SIZE_OF(current) Patches currently in stable-queue which might be from schwidefsky@de.ibm.com are queue-4.4/s390-dcssblk-fix-device-size-calculation-in-dcssblk_direct_access.patch queue-4.4/s390-task_size-for-kernel-threads.patch queue-4.4/kvm-s390-disable-dirty-log-retrieval-for-ucontrol-guests.patch queue-4.4/s390-use-correct-input-data-address-for-setup_randomness.patch queue-4.4/s390-make-setup_randomness-work.patch queue-4.4/s390-qdio-clear-dsci-prior-to-scanning-multiple-input-queues.patch