From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58754 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751500AbdGRPQc (ORCPT ); Tue, 18 Jul 2017 11:16:32 -0400 Subject: Patch "parisc: Report SIGSEGV instead of SIGBUS when running out of stack" has been added to the 4.12-stable tree To: deller@gmx.de, gregkh@linuxfoundation.org Cc: , From: Date: Tue, 18 Jul 2017 17:16:20 +0200 Message-ID: <15003909803187@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 parisc: Report SIGSEGV instead of SIGBUS when running out of stack to the 4.12-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: parisc-report-sigsegv-instead-of-sigbus-when-running-out-of-stack.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 247462316f85a9e0479445c1a4223950b68ffac1 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 2 Jul 2017 22:00:41 +0200 Subject: parisc: Report SIGSEGV instead of SIGBUS when running out of stack From: Helge Deller commit 247462316f85a9e0479445c1a4223950b68ffac1 upstream. When a process runs out of stack the parisc kernel wrongly faults with SIGBUS instead of the expected SIGSEGV signal. This example shows how the kernel faults: do_page_fault() command='a.out' type=15 address=0xfaac2000 in libc-2.24.so[f8308000+16c000] trap #15: Data TLB miss fault, vm_start = 0xfa2c2000, vm_end = 0xfaac2000 The vma->vm_end value is the first address which does not belong to the vma, so adjust the check to include vma->vm_end to the range for which to send the SIGSEGV signal. This patch unbreaks building the debian libsigsegv package. Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- arch/parisc/mm/fault.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -367,7 +367,7 @@ bad_area: case 15: /* Data TLB miss fault/Data page fault */ /* send SIGSEGV when outside of vma */ if (!vma || - address < vma->vm_start || address > vma->vm_end) { + address < vma->vm_start || address >= vma->vm_end) { si.si_signo = SIGSEGV; si.si_code = SEGV_MAPERR; break; Patches currently in stable-queue which might be from deller@gmx.de are queue-4.12/parisc-use-compat_sys_keyctl.patch queue-4.12/parisc-dma-api-return-error-instead-of-bug_on-for-dma-ops-on-non-dma-devs.patch queue-4.12/parisc-mm-ensure-irqs-are-off-in-switch_mm.patch queue-4.12/parisc-report-sigsegv-instead-of-sigbus-when-running-out-of-stack.patch