[Bug 1037431] Re: update-alternatives crashed with SIGSEGV in main()

[Raphaël Hertzog]

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Title:
  update-alternatives crashed with SIGSEGV in main()

Status in “dpkg” package in Ubuntu:
  New

Bug description:
  I got this whilst trying to debug why the nvidia-current package
  wasn't being set up properly. Digging through the postinst, I found
  the following which is part of a big update-alternatives command to
  correctly symlink the nvidia xorg driver into place:

  update-alternatives --force --slave
  /usr/lib/xorg/modules/drivers/nvidia_drv.so x86_64-linux-
  gnu_nvidia_drv /usr/lib/nvidia-current/xorg/nvidia_drv.so

  Running this by hand caused this crash.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: dpkg 1.16.7ubuntu3
  ProcVersionSignature: Ubuntu 3.5.0-10.10-generic 3.5.1
  Uname: Linux 3.5.0-10-generic x86_64
  ApportVersion: 2.4-0ubuntu6
  Architecture: amd64
  Date: Thu Aug 16 16:28:29 2012
  ExecutablePath: /usr/bin/update-alternatives
  ProcCmdline: update-alternatives --force --slave /usr/lib/xorg/modules/drivers/nvidia_drv.so x86_64-linux-gnu_nvidia_drv /usr/lib/nvidia-current/xorg/nvidia_drv.so
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_AU.UTF-8
   LANGUAGE=en_AU:en
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x4025eb:	mov    (%rax),%rdi
   PC (0x004025eb) ok
   source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rdi" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: dpkg
  StacktraceTop:
   ?? ()
   __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
   ?? ()
   ?? ()
   ?? ()
  Title: update-alternatives crashed with SIGSEGV in __libc_start_main()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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