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[Bug 1255424] Re: include of dir fails when the number of files in the dir approaches or exceeds the processes fd limit

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Jamie Strandboge <jamie@xxxxxxxxxx>
Date: Thu, 09 Oct 2014 19:43:47 -0000
Reply-to: Bug 1255424 <1255424@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

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

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https://bugs.launchpad.net/bugs/1255424

Title:
  include of dir fails when the number of files in the dir approaches or
  exceeds the processes fd limit

Status in AppArmor Linux application security framework:
  Confirmed
Status in “apparmor” package in Ubuntu:
  Confirmed

Bug description:
  The apparmor parser handles directory includes in an odd way, where
  each file in the directory is opened and the pushed as a flex buffer
  state before any files in the directory are actually processed. The
  flex buffers and associated fds are then processed one by one and the
  <eof> handling pops the buffer (and closes the fd) to get to the next
  file to process.

  This means that if a directory contains a lot of files the include
  could fail as the parser will run out of available fds.

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