[Bug 1050774] Re: grub-script-check assert failure: *** glibc detected *** /usr/bin/grub-script-check: double free or corruption (!prev): 0x08210b38 ***

[Colin Watson]

This is actually a bug somewhere in the grub-mkconfig stack.  There's a
series of increasingly-implausible lines of the form:

        menuentry 'Ubuntu'\\''\'\\'''\\'' --class ubuntu --class gnu-
linux --class gnu --class os $menuentry_id_option
'\\''\'\\'''\\''gnulinux-simple-aa1bddfe-1ddb-4832-bee9-eb31c56faefa (on
/dev/sdc4)'\\'' --class gnu-linux --class gnu --class os
$menuentry_id_option '\\''osprober-
gnulinux-/boot/vmlinuz-3.6.0-030600rc5-generic--aa1bddfe-
1ddb-4832-bee9-eb31c56faefa (on /dev/sdc5)' --class gnu-linux --class
gnu --class os $menuentry_id_option 'osprober-
gnulinux-/boot/vmlinuz-3.6.0-030600rc5-generic--00c5de83-479c-
4ab0-9b54-9af0a727175e' {

... and eventually these get long enough to overflow grub-script-check's
buffer.  The buffer size is sufficiently large that I can't really
imagine it being hit intentionally, so I'd rather fix whatever's
generating this madness.

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Title:
  grub-script-check assert failure: *** glibc detected *** /usr/bin
  /grub-script-check: double free or corruption (!prev): 0x08210b38 ***

Status in “grub2” package in Ubuntu:
  Triaged

Bug description:
  Lubuntu Quantal i386

  Yesterday i've tested grub 2.0 fromm the cjwatson ppa without issue.
  Then i've ran vbeinfo on next boot to fill custom values :
  GRUB_GFXMODE=1024x768,800x600

   Today the new 2.00-3ubuntu1 is upgraded and get that problem. Note
  that ubuntu quantal i386 have been previously upgraded with this
  latest grub 2.0 without that issue.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: grub-common 2.00-3ubuntu1
  Uname: Linux 3.6.0-030600rc5-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.5.1-0ubuntu7
  Architecture: i386
  AssertionMessage: *** glibc detected *** /usr/bin/grub-script-check: double free or corruption (!prev): 0x08210b38 ***
  Date: Fri Sep 14 09:06:51 2012
  ExecutablePath: /usr/bin/grub-script-check
  ProcCmdline: /usr/bin/grub-script-check /boot/grub/grub.cfg.new
  Signal: 6
  SourcePackage: grub2
  StacktraceTop:
   __libc_message (do_abort=2, fmt=0xb77271dc "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201
   malloc_printerr (action=<optimized out>, str=<optimized out>, ptr=0x8210b38) at malloc.c:5007
   ?? ()
   ?? ()
   ?? ()
  Title: grub-script-check assert failure: *** glibc detected *** /usr/bin/grub-script-check: double free or corruption (!prev): 0x08210b38 ***
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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