evince-thumbnailer DOSes rsyslogd

[Florian Hars]

I just noticed that I had evince-thumbnailer, systemd-journald, and at least two instances of rsyslogd each using about a full core, and writing about 50GB worth of the two lines:

Sep 20 12:07:41 dirichlet gnome-session[1581]: page: Warning: font `cmr10' not found, trying metric files instead
Sep 20 12:07:41 dirichlet gnome-session[1581]: page: Error: /usr/share/texlive/texmf-dist/fonts/tfm/public/cm/cmr10.tfm: File corrupted, or not a TFM file

into /var/log/syslog.

The last few lines leading up to that were:

Sep 20 12:06:45 dirichlet udisksd[1845]: Mounted /dev/sdc1 at /media/hars/Backup2 on behalf of uid 1000
Sep 20 12:06:45 dirichlet gnome-session[1581]: (nautilus:3898): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
Sep 20 12:06:45 dirichlet gnome-session[1581]: (nautilus:3898): GLib-GObject-WARNING **: invalid (NULL) pointer instance
Sep 20 12:06:45 dirichlet gnome-session[1581]: (nautilus:3898): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Sep 20 12:07:30 dirichlet gnome-session[1581]: (nautilus:1816): GnomeDesktop-WARNING **: Unable to create loader for mime type audio/x-wav: Unrecognized image file format
Sep 20 12:07:30 dirichlet gnome-session[1581]: (nautilus:1816): GnomeDesktop-WARNING **: Error creating thumbnail for file:///media/hars/Backup2/some/path/unbekannt.wav: Unrecognized image file format
Sep 20 12:07:31 dirichlet gnome-session[1581]: (nautilus:1816): GnomeDesktop-WARNING **: Unable to create loader for mime type audio/x-wav: Unrecognized image file format
Sep 20 12:07:31 dirichlet gnome-session[1581]: (nautilus:1816): GnomeDesktop-WARNING **: Error creating thumbnail for file:///media/hars/Backup2/some/path/unbekannt.wav: Unrecognized image file format
Sep 20 12:07:40 dirichlet gnome-session[1581]: kpathsea: Running mktexpk --mfmode / --bdpi 600 --mag 1+57/600 --dpi 657 cmr10
Sep 20 12:07:41 dirichlet gnome-session[1581]: /usr/bin/mktexpk: 1: /usr/bin/mktexpk: /usr/share/texlive/texmf-dist/web2c/mktexnam: Permission denied
Sep 20 12:07:41 dirichlet kernel: [ 3712.286587] audit_printk_skb: 39 callbacks suppressed
Sep 20 12:07:41 dirichlet kernel: [ 3712.286594] audit: type=1400 audit(1442743661.594:25): apparmor="DENIED" operation="exec" profile="/usr/bin/evince-thumbnailer//sanitized_helper" name="/usr/share/texlive/texmf-dist/web2c/mktexnam" pid=4036 comm="mktexpk" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0
Sep 20 12:07:41 dirichlet gnome-session[1581]: mktexpk: / already exists.
Sep 20 12:07:41 dirichlet gnome-session[1581]: /usr/bin/mktexpk: 229: /usr/bin/mktexpk: /usr/share/texlive/texmf-dist/web2c/mktexupd: Permission denied
Sep 20 12:07:41 dirichlet kernel: [ 3712.291366] audit: type=1400 audit(1442743661.598:26): apparmor="DENIED" operation="exec" profile="/usr/bin/evince-thumbnailer//sanitized_helper" name="/usr/share/texlive/texmf-dist/web2c/mktexupd" pid=4041 comm="mktexpk" requested_mask="x" denied_mask="x" fsuid=1000 ouid=0
Sep 20 12:07:41 dirichlet gnome-session[1581]: kpathsea: Appending font creation commands to missfont.log.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: evince 3.14.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
Uname: Linux 3.19.0-28-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.4
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Sep 20 15:02:02 2015
InstallationDate: Installed on 2014-04-14 (523 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
SourcePackage: evince
UpgradeStatus: Upgraded to vivid on 2015-05-01 (141 days ago)

[Florian Hars (hars)]

I found an easy way to reproduce the issue:

navigate to a directory that contains a dvi-file in nautilus, and you end up with:

top - 15:15:40 up 4:09, 3 users, load average: 3,36, 1,64, 1,68
Aufgaben: 248 total, 2 running, 246 sleeping, 0 stopped, 0 zombie
%Cpu(s): 35,0 be, 39,8 sy, 0,8 ni, 24,4 un, 0,0 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 31791692 total, 5193104 used, 26598588 free, 80824 buffers
KiB Swap: 32444412 total, 1044628 used, 31399784 free. 1865100 cached Mem

  PID BENUTZER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
  362 root 20 0 86720 12020 11856 R 97,8 0,0 166:36.81 systemd-journal
 9600 hars 20 0 1118484 823024 14412 S 95,8 2,6 2:07.34 evince-thumbnai
  730 syslog 20 0 255896 1132 728 S 91,5 0,0 163:30.19 rsyslogd
And fix this stupid bugtracker to support markdown or whatever.

[Sebastien Bacher (seb128)]

There is a bug upstream about similar issues, https://bugzilla.gnome.org/show_bug.cgi?id=741232

[Ads20000 (ads20000)]

I can't reproduce this issue with the following .dvi file, could you attach a .dvi file that does trigger the bug on Ubuntu 18.04 or is this fixed in that release?

[Mateusz Bawaj (mateusz-bawaj)]

I experienced the same bug with syslog flooded. It seems that it happens when PDF or SVG documents have embedded LaTeX font (often cmr10 but I bet that with others it would be the same) gnome has problems with generating thumbnails. In my case it is looking for the right TFM file in texlive font directory:

gnome-session[3640]: page: Warning: font `cmr10' not found, trying metric files instead
gnome-session[3640]: page: Error: /usr/share/texlive/texmf-dist/fonts/tfm/public/cm/cmr10.tfm: File corrupted, or not a TFM file

and it finds it corrupted and retries filling the log.

When I remove the "corrupted" file gnome tries to regenerate it but it finds the folder read-only.

gnome-session[3640]: kpathsea: Running mkofm cmr10
gnome-session[3640]: mkofm: Permission denied

I solved the problem by regenerating TFM manually: mktextfm cmr10 and substituting the TFM file in texlive.