NetBSD Problem Report #52628

From www@NetBSD.org  Thu Oct 19 09:16:09 2017
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Message-Id: <20171019091608.D07C37A295@mollari.NetBSD.org>
Date: Thu, 19 Oct 2017 09:16:08 +0000 (UTC)
From: n54@gmx.com
Reply-To: n54@gmx.com
To: gnats-bugs@NetBSD.org
Subject: tracing 32-bit application on 64-bit kernel panic
X-Send-Pr-Version: www-1.0

>Number:         52628
>Category:       kern
>Synopsis:       tracing 32-bit application on 64-bit kernel panic
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kamil
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 19 09:20:00 +0000 2017
>Closed-Date:    Tue Jun 04 22:59:30 +0000 2019
>Last-Modified:  Tue Jun 04 22:59:30 +0000 2019
>Originator:     Kamil Rytarowski
>Release:        NetBSD 8.99.2 amd64
>Organization:
TNF
>Environment:
NetBSD compaq 8.99.2 NetBSD 8.99.2 (GENERIC) #1: Wed Sep  6 23:28:12 CEST 2017  root@chieftec:/public/netbsd-root/sys/arch/amd64/compile/GENERIC amd64
c
>Description:
# crash -M ./netbsd.4.core -N /netbsd.gdb                                                                                                             
Crash version 8.99.2, image version 8.99.2.
System panicked: kernel diagnostic assertion "(p->p_flag & PK_32) == 0" failed: file "/usr/src/sys/arch/amd64/amd64/machdep.c", line 1906 
Backtrace from time of crash is available.
crash> bt
_KERNEL_OPT_NVGA_RASTERCONSOLE() at 0
?() at ffffe40049a33360
vpanic() at vpanic+0x149
ch_voltag_convert_in() at ch_voltag_convert_in
cpu_mcontext_validate() at cpu_mcontext_validate+0x10e
process_write_regs() at process_write_regs+0x13
process_doregs() at process_doregs+0xb9
do_ptrace() at do_ptrace+0x8a7
sys_ptrace() at sys_ptrace+0x28
syscall() at syscall+0x1d8
--- syscall (number 26) ---
77327463c917:
>How-To-Repeat:
gcc test.c -m32 -o test
gdb ./test
>Fix:
Not investigated but this shall be fixed for NetBSD-8.

>Release-Note:

>Audit-Trail:
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/52628: tracing 32-bit application on 64-bit kernel panic
Date: Thu, 19 Oct 2017 11:27:07 +0200

 On Thu, Oct 19, 2017 at 09:20:00AM +0000, n54@gmx.com wrote:
 > >How-To-Repeat:
 > gcc test.c -m32 -o test
 > gdb ./test

 I can not quite reproduce it:

 [/tmp] martin@seven-days-to-the-wolves > file test
 test: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /usr/libexec/ld.elf_so, for NetBSD 8.99.4, not stripped
 [/tmp] martin@seven-days-to-the-wolves > uname -a
 NetBSD seven-days-to-the-wolves.aprisoft.de 8.99.4 NetBSD 8.99.4 (GENERIC) #160: Wed Oct 11 12:35:27 CEST 2017  martin@seven-days-to-the-wolves.aprisoft.de:/work/src/sys/arch/amd64/compile/GENERIC amd64
 [/tmp] martin@seven-days-to-the-wolves > gdb ./test
 GNU gdb (GDB) 7.12
 Copyright (C) 2016 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "x86_64--netbsd".
 Type "show configuration" for configuration details.
 For bug reporting instructions, please see:
 <http://www.gnu.org/software/gdb/bugs/>.
 Find the GDB manual and other documentation resources online at:
 <http://www.gnu.org/software/gdb/documentation/>.
 For help, type "help".
 Type "apropos word" to search for commands related to "word"...
 Reading symbols from ./test...(no debugging symbols found)...done.
 (gdb) run
 Starting program: /tmp/test 
 Couldn't write registers: Invalid argument.
 (gdb) 

 Martin

From: Kamil Rytarowski <n54@gmx.com>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/52628: tracing 32-bit application on 64-bit kernel panic
Date: Thu, 19 Oct 2017 11:41:24 +0200

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 From: Kamil Rytarowski <n54@gmx.com>
 To: gnats-bugs@NetBSD.org
 Message-ID: <dfc92cfa-d7e5-4068-12e5-3c15c9bc53fc@gmx.com>
 Subject: Re: kern/52628: tracing 32-bit application on 64-bit kernel panic
 References: <pr-kern-52628@gnats.netbsd.org>
  <20171019091608.D07C37A295@mollari.NetBSD.org>
  <20171019093001.BF8F77A295@mollari.NetBSD.org>
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 On 19.10.2017 11:30, Martin Husemann wrote:
 > The following reply was made to PR kern/52628; it has been noted by GNA=
 TS.
 >=20
 > From: Martin Husemann <martin@duskware.de>
 > To: gnats-bugs@NetBSD.org
 > Cc:=20
 > Subject: Re: kern/52628: tracing 32-bit application on 64-bit kernel pa=
 nic
 > Date: Thu, 19 Oct 2017 11:27:07 +0200
 >=20
 >  On Thu, Oct 19, 2017 at 09:20:00AM +0000, n54@gmx.com wrote:
 >  > >How-To-Repeat:
 >  > gcc test.c -m32 -o test
 >  > gdb ./test
 > =20
 >  I can not quite reproduce it:
 > =20
 >  [/tmp] martin@seven-days-to-the-wolves > file test
 >  test: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynami=
 cally linked, interpreter /usr/libexec/ld.elf_so, for NetBSD 8.99.4, not =
 stripped
 >  [/tmp] martin@seven-days-to-the-wolves > uname -a
 >  NetBSD seven-days-to-the-wolves.aprisoft.de 8.99.4 NetBSD 8.99.4 (GENE=
 RIC) #160: Wed Oct 11 12:35:27 CEST 2017  martin@seven-days-to-the-wolves=
 =2Eaprisoft.de:/work/src/sys/arch/amd64/compile/GENERIC amd64
 >  [/tmp] martin@seven-days-to-the-wolves > gdb ./test
 >  GNU gdb (GDB) 7.12
 >  Copyright (C) 2016 Free Software Foundation, Inc.
 >  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gp=
 l.html>
 >  This is free software: you are free to change and redistribute it.
 >  There is NO WARRANTY, to the extent permitted by law.  Type "show copy=
 ing"
 >  and "show warranty" for details.
 >  This GDB was configured as "x86_64--netbsd".
 >  Type "show configuration" for configuration details.
 >  For bug reporting instructions, please see:
 >  <http://www.gnu.org/software/gdb/bugs/>.
 >  Find the GDB manual and other documentation resources online at:
 >  <http://www.gnu.org/software/gdb/documentation/>.
 >  For help, type "help".
 >  Type "apropos word" to search for commands related to "word"...
 >  Reading symbols from ./test...(no debugging symbols found)...done.
 >  (gdb) run
 >  Starting program: /tmp/test=20
 >  Couldn't write registers: Invalid argument.
 >  (gdb)=20
 > =20
 >  Martin
 > =20
 >=20

 I observed this already in the past..  I was trying to panic the kernel
 with ATF ptrace(2) tests from i386 on amd64 without success.

 I will investigate it later.


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Responsible-Changed-From-To: kern-bug-people->kamil
Responsible-Changed-By: kamil@NetBSD.org
Responsible-Changed-When: Mon, 06 Nov 2017 05:30:32 +0100
Responsible-Changed-Why:
Take.


State-Changed-From-To: open->closed
State-Changed-By: kamil@NetBSD.org
State-Changed-When: Wed, 05 Jun 2019 00:59:30 +0200
State-Changed-Why:
No longer reproducible as of NetBSD 8.99.42.


>Unformatted:

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