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Bug#902678: marked as done (unsub_copy: segfault at 0 ip error 4 in libc-2.19.so)

Your message dated Sat, 4 Aug 2018 23:45:50 +0200
with message-id <20180804214550.GD5563@aurel32.net>
and subject line Re: Bug#902678: unsub_copy: segfault at 0 ip error 4 in libc-2.19.so
has caused the Debian Bug report #902678,
regarding unsub_copy: segfault at 0 ip error 4 in libc-2.19.so
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
902678: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902678
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: reportbug
Version: 6.6.3+deb8u1
Severity: normal

Dear Maintainer,

   * What led up to the situation?
    Answer: don't know, nothing new was installed

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
    Answer: nothing cause cannot find solution google don't know what is "unsub_copy"

   * What was the outcome of this action?

   * What outcome did you expect instead?

Problem: Since few days ago I found in the kern.log / messages.log and syslog below lines:

These lines appear randomly like below example,

Jun 29 14:09:09 backup kernel: [3132191.949481] unsub_copy[10238]: segfault at 0 ip 00007fa8e46695e4 sp 00007ffe8a7709a0 error 4 in libc-2.19.so[7fa8e4600000+1a1000]
Jun 29 14:09:23 backup kernel: [3132205.893641] unsub_copy[10624]: segfault at 0 ip 00007ff3740b95e4 sp 00007ffe73950590 error 4 in libc-2.19.so[7ff374050000+1a1000]
Jun 29 14:10:02 backup kernel: [3132244.769708] unsub_copy[11736]: segfault at 0 ip 00007ff8b83495e4 sp 00007fff1300fda0 error 4 in libc-2.19.so[7ff8b82e0000+1a1000]
Jun 29 14:11:28 backup kernel: [3132330.544565] unsub_copy[14783]: segfault at 0 ip 00007f9b9d9ff5e4 sp 00007ffeeaceb000 error 4 in libc-2.19.so[7f9b9d996000+1a1000]
Jun 29 14:13:01 backup kernel: [3132424.138362] unsub_copy[18412]: segfault at 0 ip 00007efc6f12d5e4 sp 00007ffd3d92b730 error 4 in libc-2.19.so[7efc6f0c4000+1a1000]
Jun 29 14:13:35 backup kernel: [3132457.576257] unsub_copy[19792]: segfault at 0 ip 00007faf6df5e5e4 sp 00007fff19bdd3d0 error 4 in libc-2.19.so[7faf6def5000+1a1000]
Jun 29 14:14:00 backup kernel: [3132482.572554] unsub_copy[20314]: segfault at 0 ip 00007faa2e6f35e4 sp 00007ffefa711430 error 4 in libc-2.19.so[7faa2e68a000+1a1000]
Jun 29 14:15:04 backup kernel: [3132546.752067] unsub_copy[25126]: segfault at 0 ip 00007f57e848a5e4 sp 00007ffd7e3795c0 error 4 in libc-2.19.so[7f57e8421000+1a1000]
Jun 29 14:15:04 backup kernel: [3132546.792256] unsub_copy[25140]: segfault at 0 ip 00007f988ca595e4 sp 00007ffe07c35650 error 4 in libc-2.19.so[7f988c9f0000+1a1000]
Jun 29 14:15:50 backup kernel: [3132593.114237] unsub_copy[32474]: segfault at 0 ip 00007f1f1601f5e4 sp 00007fffb415dc20 error 4 in libc-2.19.so[7f1f15fb6000+1a1000]
Jun 29 14:15:50 backup kernel: [3132593.123985] unsub_copy[32478]: segfault at 0 ip 00007efede6915e4 sp 00007ffeb3dbb4d0 error 4 in libc-2.19.so[7efede628000+1a1000]
Jun 29 14:15:50 backup kernel: [3132593.229071] unsub_copy[32487]: segfault at 0 ip 00007fd889aae5e4 sp 00007ffde572b550 error 4 in libc-2.19.so[7fd889a45000+1a1000]
Jun 29 14:15:50 backup kernel: [3132593.231343] unsub_copy[32490]: segfault at 0 ip 00007fb1c81345e4 sp 00007ffc7e3db390 error 4 in libc-2.19.so[7fb1c80cb000+1a1000]
Jun 29 14:15:50 backup kernel: [3132593.345188] unsub_copy[32496]: segfault at 0 ip 00007f41ac0f25e4 sp 00007fff4c5f8610 error 4 in libc-2.19.so[7f41ac089000+1a1000]
Jun 29 14:15:51 backup kernel: [3132593.604890] unsub_copy[32502]: segfault at 0 ip 00007ff3f6b605e4 sp 00007fff8a725550 error 4 in libc-2.19.so[7ff3f6af7000+1a1000]
Jun 29 14:17:02 backup kernel: [3132664.761601] unsub_copy[3163]: segfault at 0 ip 00007f481295a5e4 sp 00007ffc5e1cbfd0 error 4 in libc-2.19.so[7f48128f1000+1a1000]
Jun 29 14:17:12 backup kernel: [3132674.625068] unsub_copy[3460]: segfault at 0 ip 00007f48f68c05e4 sp 00007ffd1c5e77d0 error 4 in libc-2.19.so[7f48f6857000+1a1000]

I tried to reinstall libc packages without result.

-- Package-specific info:
** Environment settings:
INTERFACE="text"

** /root/.reportbugrc:
reportbug_version "6.6.3"
mode standard
ui text
realname "Arkadiusz Zug"
email "a.zug@inis.pl"
no-check-uid

-- System Information:
Debian Release: 8.11
  APT prefers oldstable-updates
  APT policy: (500, 'oldstable-updates'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-5-amd64 (SMP w/24 CPU cores)
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to pl_PL.UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages reportbug depends on:
ii  apt               1.0.9.8.4
ii  python            2.7.9-1
ii  python-reportbug  6.6.3+deb8u1
pn  python:any        <none>

reportbug recommends no packages.

Versions of packages reportbug suggests:
pn  claws-mail                                 <none>
pn  debconf-utils                              <none>
pn  debsums                                    <none>
pn  dlocate                                    <none>
pn  emacs23-bin-common | emacs24-bin-common    <none>
ii  exim4                                      4.84.2-2+deb8u5
ii  exim4-daemon-light [mail-transport-agent]  4.84.2-2+deb8u5
ii  file                                       1:5.22+15-2+deb8u4
ii  gnupg                                      1.4.18-7+deb8u5
pn  python-gtk2                                <none>
pn  python-gtkspell                            <none>
pn  python-urwid                               <none>
pn  python-vte                                 <none>
pn  xdg-utils                                  <none>

Versions of packages python-reportbug depends on:
ii  apt               1.0.9.8.4
ii  python-debian     0.1.27
ii  python-debianbts  1.12
pn  python:any        <none>

python-reportbug suggests no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
On 2018-07-02 22:24, Aurelien Jarno wrote:
> On 2018-07-02 10:37, Arkadiusz Zug wrote:
> > Hello,
> > 
> > Thanks for your reply.
> > 
> > No. I have only unsub_copy. I don't have any other errors and thats why I
> > wrote to you. I couldn't find this kind of error. I tried to find in google
> > without result. Google doesn't know what is "unsub_copy".
> 
> If you don't know what this code, it's difficult to help you. It's
> definitely not something provided by Debian, so it's has been installed
> by hand. You should look for such a binary on your system. Alternatively
> at the code seems to be launched regularly and this likely
> automatically, you might want to look at /var/log/syslog.
> 
> > I have this error all the time:
> > 
> > Jul  2 10:32:07 backup kernel: [3378556.256208] unsub_copy[25424]: segfault
> > at 0 ip 00007f85140a65e4 sp 00007ffd83eb0660 error 4 in libc-2.19.so
> > [7f851403d000+1a1000]
> 
> As said in my previous email, it's very likely a bug in unsub_copy,
> calling fclose(NULL).

Given the issue appears in an unknown, non-Debian packaged binary, and
that it is unlikely to be a glibc bug, I am just closing the bug. Feel
free to reopen it if you have more details to provide.

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net

--- End Message ---
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