[Bug 1173091] Re: skype crashes because malloc in libGL from fglrx is resolved incorrectly

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: eglibc (Ubuntu)
       Status: New => Confirmed

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Title:
  skype crashes because malloc in libGL from fglrx is resolved
  incorrectly

Status in “eglibc” package in Ubuntu:
  Confirmed

Bug description:
  After the update to Raring Skype doesn't start anymore. This is the
  backtrace:

  Starting program: /usr/bin/skype 
  [...]
  Program received signal SIGSEGV, Segmentation fault.
  0x08075f40 in malloc at plt ()
  (gdb) bt
  #0  0x08075f40 in malloc at plt ()
  #1  0xf40dbe0e in ?? () from /usr/lib32/fglrx/libGL.so.1
  #2  0xf40a815d in ?? () from /usr/lib32/fglrx/libGL.so.1
  #3  0xf7feb1d5 in ?? () from /lib/ld-linux.so.2
  #4  0xf7feb2fc in ?? () from /lib/ld-linux.so.2
  #5  0xf7fdd1df in ?? () from /lib/ld-linux.so.2

  relevant entries from /proc/<pid>/maps:
  08048000-09ac4000 rwxp 00000000 fc:02 918326                             /usr/bin/skype
  f405c000-f4128000 r-xp 00000000 fc:02 923545                             /usr/lib32/fglrx/libGL.so.1.2
  f7fdc000-f7ffc000 r-xp 00000000 fc:02 4720042                            /lib/i386-linux-gnu/ld-2.17.so

  The disassembly at 0x08075f40 shows:
     0x08075f40 <+0>:     cmp    %bl,0xd(%ebx,%eiz,8)
     0x08075f44 <+4>:     out    %al,(%dx)
     0x08075f45 <+5>:     lods   %ds:(%esi),%eax
     0x08075f46 <+6>:     jecxz  0x8075f85 <_ZN8QWebPage11qt_metacastEPKc at plt+5>
     0x08075f48 <+8>:     and    $0xc3d4ec67,%eax
     0x08075f4d <+13>:    sub    $0xb1f62b1a,%eax

  ... which looks very wrong to me.

  objdump -T /usr/bin/skype shows the following:
  08075f40      DF *UND*  00000000  GLIBC_2.0   malloc

  Let me know if I can provide more information.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: libc6:i386 2.17-0ubuntu5
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  Date: Fri Apr 26 10:44:28 2013
  InstallationDate: Installed on 2012-11-07 (169 days ago)
  InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
  MarkForUpload: True
  PackageArchitecture: i386
  SourcePackage: eglibc
  UpgradeStatus: Upgraded to raring on 2013-04-25 (0 days ago)

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