[Bug 805752] Re: fontforge crashed with SIGSEGV in GImageRead_Png() due to optipng

[Paul Sladen]

Pitti: looks like Optipng is producing duff PNGs that are causing the
crashes.

** Also affects: optipng (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  fontforge crashed with SIGSEGV in GImageRead_Png() due to optipng

Status in “fontforge” package in Ubuntu:
  Triaged
Status in “optipng” package in Ubuntu:
  New

Bug description:
  I simply clicked on one of the free fonts downloaded from Google
  (Cabin).  Fontforge consistently crashes with any TTF font.

  TEST CASE:
  1. Launch fontforge
  2. Open a TTF file

  Result:
  fontforge segfaults

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: fontforge 0.0.20110222-1
  ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5
  Uname: Linux 3.0-3-generic x86_64
  NonfreeKernelModules: wl
  Architecture: amd64
  CrashCounter: 1
  Date: Mon Jul  4 22:13:11 2011
  ExecutablePath: /usr/bin/fontforge
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcCmdline: fontforge /home/username/Download/tempo/Cabin/Cabin-Bold.ttf
  ProcEnviron:
   LANGUAGE=pt_BR:en
   PATH=(custom, user)
   LANG=pt_BR.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7f9fc30d0d0f <GImageRead_Png+1407>:	movzbl (%rax),%eax
   PC (0x7f9fc30d0d0f) ok
   source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: fontforge
  StacktraceTop:
   GImageRead_Png () from /usr/lib/libgutils.so.1
   GImageReadPng () from /usr/lib/libgutils.so.1
   ?? () from /usr/lib/libgdraw.so.4
   ?? () from /usr/lib/libgdraw.so.4
   GMenuItem2ArrayCopy () from /usr/lib/libgdraw.so.4
  Title: fontforge crashed with SIGSEGV in GImageRead_Png()
  UpgradeStatus: Upgraded to oneiric on 2011-07-02 (2 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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