[Bug 633331] Re: umountable entry in /etc/fstab causes boot to hang

[Steve Langasek]

*** This bug is a duplicate of bug 577636 ***
    https://bugs.launchpad.net/bugs/577636

** This bug has been marked a duplicate of bug 577636
   Filesystem could not be mounted: /proc/bus/usb

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https://bugs.launchpad.net/bugs/633331

Title:
  umountable entry in /etc/fstab causes boot to hang

Status in “mountall” package in Ubuntu:
  New

Bug description:
  Binary package hint: mountall

  I had the following entry in my /etc/fstab:

  usbfs           /proc/bus/usb   usbfs   auto            0       0

  which existed prior to my upgrade to Lucid and thus worked fine on
  pre-Lucid releases.  However, as of Lucid this entry is invalid
  because there is no /proc/bus/usb anymore.

  This failure to mount would cause mountall to hang the entire boot
  process without any opportunity to rectify the situation in single
  user mode or anything like that.

  What makes this so much more interesting however is that I could get
  the system to boot successfully, even with the bad mount entry simply
  adding "init=/bin/bash" to the kernel command line and then when the
  bash init came up, simply run:

  # exec /sbin/init

  So there was something about having a shell before the real init that
  would cause the system to boot successfully despite a bad /etc/fstab
  entry.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: mountall 2.15.1
  ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5
  Uname: Linux 2.6.32-24-generic i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  Date: Wed Sep  8 12:11:18 2010
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_CA.utf8
   SHELL=/bin/bash
  SourcePackage: mountall

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