Re: port-amd64/52596 (Another netbsd-8 panic)

[Dominik Bialy <dmb%yenn.ulegend.net@localhost>]

On Mon, Oct 09, 2017 at 01:00:02PM +0000, Kamil Rytarowski wrote:
> The following reply was made to PR port-amd64/52596; it has been noted by GNATS.
> 
> From: Kamil Rytarowski <n54%gmx.com@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: 
> Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
> Date: Mon, 9 Oct 2017 14:58:28 +0200
> 
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>  From: Kamil Rytarowski <n54%gmx.com@localhost>
>  To: gnats-bugs%NetBSD.org@localhost
>  Message-ID: <35eeab5d-5eb1-2c24-5719-4ee284bbd4e0%gmx.com@localhost>
>  Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
>  References: <pr-port-amd64-52596%gnats.netbsd.org@localhost>
>   <20171006053940.1CB755CD8%yenn.ulegend.net@localhost>
>   <20171009124001.6CD267A2AC%mollari.NetBSD.org@localhost>
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>  On 09.10.2017 14:40, Dominik Bialy wrote:
>  > The following reply was made to PR port-amd64/52596; it has been noted =
>  by GNATS.
>  >=20
>  > From: Dominik Bialy <dmb%yenn.ulegend.net@localhost>
>  > To: coypu%sdf.org@localhost
>  > Cc: Dominik Bialy <dmb%yenn.ulegend.net@localhost>, gnats-bugs%NetBSD.org@localhost
>  > Subject: Re: port-amd64/52596 (Another netbsd-8 panic)
>  > Date: Mon, 9 Oct 2017 14:37:47 +0200
>  >=20
>  >  On Mon, Oct 09, 2017 at 10:13:34AM +0000, coypu%sdf.org@localhost wrote:
>  >  > On Mon, Oct 09, 2017 at 10:01:47AM +0200, Dominik Bialy wrote:
>  >  > > Current sysctls are:
>  >  > >=20
>  >  > > yenn# sysctl machdep.xsave_features
>  >  > > machdep.xsave_features =3D 0
>  >  > > yenn# sysctl machdep.fpu_save
>  >  > > machdep.fpu_save =3D 1
>  >  > >=20
>  >  > > I'll try applying the patch today and building the kernel.
>  >  >=20
>  >  > sorry, I misread the code, it shouldn't make a functional difference=
>  
>  >  > either way.
>  >  >=20
>  >  > do you have a coredump in /var/crash?
>  >  > can you:
>  >  > gunzip netbsd.3.core.gz
>  >  > gunzip netbsd.3.gz
>  >  > crash -M netbsd.3.core -N netbsd.3
>  >  >=20
>  >  > crash> dmesg
>  >  > (only to confirm it died at the same spot)
>  >  > crash> examine x86_xsave_features
>  >  > crash> bt
>  > =20
>  >  I found one coredump from Sep 23 (sources were
>  >  dated around Sep 15.)
>  > =20
>  >  fatal privileged instruction fault in supervisor mode
>  >  trap type 0 code 0 rip 0xffffffff80224a52 cs 0x8 rflags 0x10016 cr2 0x=
>  75ba90c36d60 ilevel 0x8 rsp 0xfffffe804057
>  >  bea8
>  >  curlwp 0xfffffe81318c2720 pid 391.2 lowest kstack 0xfffffe80405792c0
>  >  panic: trap
>  >  cpu1: Begin traceback...
>  >  vpanic() at netbsd:vpanic+0x140
>  >  snprintf() at netbsd:snprintf
>  >  startlwp() at netbsd:startlwp
>  >  alltraps() at netbsd:alltraps+0x96
>  >  fpudna() at netbsd:fpudna+0x61
>  >  cpu1: End traceback...
>  > =20
>  >  dumping to dev 18,1 (offset=3D132519, size=3D1032011):
>  >  dump
>  >  crash> examine x86_xsave_features
>  >  x86_xsave_features:     160b78a0
>  
>  Looks like trash..
>  
>  Please try:
>  examine x86_fpu_save_size
>  examine x86_fpu_save
>  examine i386_nocpuid_cpus
>  
>  (checking if the stack has been damaged)

yenn# crash -M netbsd.6.core -N netbsd.6
Crash version 8.0_BETA, image version 8.0_BETA.
System panicked: trap
Backtrace from time of crash is available.
crash> examine x86_fpu_save_size
x86_fpu_save_size:      200
crash> examine x86_fpu_save
x86_fpu_save:   1
crash> examine i386_nocpuid_cpus
i386_nocpuid_cpus:      1
crash>

>  
>  >  crash> bt
>  >  _KERNEL_OPT_NARCNET() at 0
>  >  _KERNEL_OPT_ACPI_SCANPCI() at _KERNEL_OPT_ACPI_SCANPCI+0x7
>  >  vpanic() at vpanic+0x149
>  >  snprintf() at snprintf
>  >  startlwp() at startlwp
>  >  calltrap() at calltrap+0x11
>  >  fpudna() at fpudna+0x61
>  >  crash>
>  > =20
>  >=20
>  
>  
>  
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