[Pkg-javascript-devel] Bug#922075: Bug#922075: npm: segfault during extract on i386

[Jérémy Lal]

Le ven. 29 mars 2019 à 14:22, Bernhard Übelacker <bernhardu at mailbox.org> a
écrit :

> Hello Jérémy,
>
> Am 29.03.19 um 12:44 schrieb Jérémy Lal:
> > This fails too:
> > yarnpkg add electron-spellchecker at 1.1.2
> >
> > Are you all doing this on qemu or on real hardware ?
> > On i686 ?
> > I'm asking because buster does not support i586, nor does nodejs,
> > and it seems qemu defaults to something < i686 (to be verified).
>
> I tested just inside qemu.
> Teemu Ikonen's original report looks like on real hardware.
>
> Other cases where cpu features were related, the process
> usually gets a SIGILL on a instruction not supported.
> In this case we get SIGSEGV on a mov instruction, which
> is quite common I guess.
> So I am not sure, if in this case the cpu is the issue.
>
> Qemu can also use other cpu configurations like "-M max"
> or "-M host". That way it should be able to do all what the
> host is able to? Have not tested such a configuration.
>
> I have repeated the test on real hardware and it crashes
> the same as in the VM. I hope buster is supported on
> this hardware?
>

Buster release notes:
"""
Nearly all x86-based (IA-32) processors still in use in personal computers
are supported.
This also includes 32-bit AMD and VIA (former Cyrix) processors, and
processors like the
Athlon XP and Intel P4 Xeon.
However, Debian GNU/Linux buster will not run on 586 (Pentium) or earlier
processors.
"""

I let you check if that's all right for your host cpu.

So if i run qemu with the first P6 cpu that comes to mind, pentiumpro,
npm install electron-spellchecker at 1.1.2
no longer crashes.

That doesn't prove there is no crash on a supported cpu, but that's a start.
Comparing the flags and address sizes might help.
Also upstream nodejs does not support 32bit cpu on linux platform.

Jérémy





Kind regards,
> Bernhard
>
>
>
> Real hardware:
> root at debian-athlonx2-32:~# lscpu
> Architecture:        i686
> CPU op-mode(s):      32-bit, 64-bit
> Byte Order:          Little Endian
> Address sizes:       40 bits physical, 48 bits virtual
> CPU(s):              2
> On-line CPU(s) list: 0,1
> Thread(s) per core:  1
> Core(s) per socket:  2
> Socket(s):           1
> Vendor ID:           AuthenticAMD
> CPU family:          15
> Model:               107
> Model name:          AMD Athlon(tm) 64 X2 Dual Core Processor 5000+
> Stepping:            1
> CPU MHz:             1000.000
> CPU max MHz:         2600,0000
> CPU min MHz:         1000,0000
> BogoMIPS:            2009.24
> Virtualization:      AMD-V
> L1d cache:           64K
> L1i cache:           64K
> L2 cache:            512K
> Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> rdtscp lm 3dnowext 3dnow rep_good cpuid extd_apicid pni cx16 lahf_lm
> cmp_legacy svm extapic cr8_legacy 3dnowprefetch vmmcall lbrv
>
> Mär 29 14:10:10 debian-athlonx2-32 kernel: npm[5417]: segfault at 1085 ip
> b6f9023b sp bfd1a1b4 error 4 in libnode.so.64[b6eb4000+b4a000]
> Mär 29 14:10:10 debian-athlonx2-32 kernel: Code: 01 00 00 85 c0 74 16 8d
> 96 6c 01 00 00 39 d0 74 0c 83 ec 0c 50 e8 f5 14 f5 ff 83 c4 10 8b 86 4c 01
> 00 00 85 c0 74 0c 83 ec 0c <8b>
>  10 50 ff 52 04 83 c4 10 8b 83 54 69 01 00 8b 4e 04 83 c0 08 89
>
> ######
>
>
> Inside my qemu i386 VM with default cpu:
> root at debian:~# lscpu
> Architecture:        i686
> CPU op-mode(s):      32-bit
> Byte Order:          Little Endian
> Address sizes:       36 bits physical, 32 bits virtual
> CPU(s):              14
> On-line CPU(s) list: 0-13
> Thread(s) per core:  1
> Core(s) per socket:  1
> Socket(s):           14
> Vendor ID:           AuthenticAMD
> CPU family:          6
> Model:               6
> Model name:          QEMU Virtual CPU version 2.5+
> Stepping:            3
> CPU MHz:             2994.374
> BogoMIPS:            5988.74
> Hypervisor vendor:   KVM
> Virtualization type: full
> Flags:               fpu de pse tsc msr pae mce cx8 apic sep pge cmov pat
> mmx fxsr sse sse2 cpuid tsc_known_freq pni x2apic hypervisor vmmcall
>
>
> ######
>
>
> $ qemu-system-i386 -cpu help
> ...
> x86 host                  KVM processor with all supported host features
> x86 max                   Enables all features supported by the
> accelerator in the current host
>
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