[Bug 956870] Re: growpart tickles overflow bug in klibc with big disks

[Neil Wilson]

** No longer affects: klibc (Ubuntu)

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https://bugs.launchpad.net/bugs/956870

Title:
  growpart tickles overflow bug in klibc with big disks

Status in “busybox” package in Ubuntu:
  New
Status in “cloud-initramfs-tools” package in Ubuntu:
  New

Bug description:
  If the number of blocks in a disk is greater than the maximum size of
  a signed 32-bit integer then growpart will fail in the initramfs.

  This is because the 'test' function in busybox gives the incorrect
  answer with large numbers. Since the busybox test function works fine
  under 'libc' when a server is booted, it looks like the root cause is
  a 32-bit overflow fault in klibc.

  To check for the problem, boot a server with a 'break init' option to
  force the initramfs to drop to a shell.

  (initramfs) [ 2117696 -gt 2147483647 ]
  (initramfs) echo $?
  1
  (initramfs) [ 2117696 -gt 2147483648 ]
  (initramfs) echo $?
  0

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: cloud-initramfs-growroot (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
  Uname: Linux 3.0.0-16-generic x86_64
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  CheckboxSubmission: 55cafa5b8b82ed224cc59d444cb1fc25
  CheckboxSystem: 3e53d3ea5811723345f19eff5070f9ab
  Date: Fri Mar 16 11:05:07 2012
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  SourcePackage: cloud-initramfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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