[Bug 988045] ThreadStacktrace.txt

[Apport retracing service]

** Attachment added: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/bugs/988045/+attachment/3102533/+files/ThreadStacktrace.txt

** Attachment removed: "CoreDump.gz"
   https://bugs.launchpad.net/bugs/988045/+attachment/3102523/+files/CoreDump.gz

** Changed in: bash (Ubuntu)
   Importance: Undecided => Medium

** Summary changed:

- bash crashed with SIGSEGV in xmalloc()
+ bash crashed with SIGSEGV in internal_malloc()

** Tags removed: need-amd64-retrace

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Title:
  bash crashed with SIGSEGV in internal_malloc()

Status in “bash” package in Ubuntu:
  New

Bug description:
  I was typing on the command line and backspacing and BOOM the shell (and enclosing rxvt) went away.
  I can't ever remember crashing bash before.
  I had noticed yesterday that this interactive bash had managed to use up way more cpu (over 30 minutes!) than my other two dozen bash shells in various windows:

  bash                DX idallen  pts/3    1097.12 secs Tue Apr 17 01:52

  The nearest bash in CPU use was 6 *seconds* of CPU.  What is with this
  one?

  I've also had Firefox crashes, so I'm not above believing that I have
  either memory issues (but memtest says I don't) or SSD issues (OCZ
  Vertex 2).

  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: bash 4.2-0ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-13.57-generic 2.6.38.8
  Uname: Linux 2.6.38-13-generic x86_64
  Architecture: amd64
  Date: Tue Apr 24 17:26:16 2012
  ExecutablePath: /bin/bash
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcCmdline: -bash
  SegvAnalysis:
   Segfault happened at: 0x4a9d6b:	callq  0x41ae20 <memset at plt>
   PC (0x004a9d6b) ok
   source "0x41ae20" (0x0041ae20) ok
   destination "(%rsp)" (0x7fff9e2cbf70) not located in a known VMA region (needed writable region)!
   Stack memory exhausted (SP below stack segment)
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: bash
  StacktraceTop:
   ?? ()
   xmalloc ()
   ?? ()
   rl_vi_change_to ()
   _rl_dispatch_subseq ()
  Title: bash crashed with SIGSEGV in xmalloc()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout disk lpadmin plugdev sambashare video

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