[Bug 1242746] [NEW] SIGSEGV when file2str reads zero bytes

[John-Mark Bell]

Public bug reported:

The changes made in the following commit, which backported a number of
changes to the procps package in precise, result in various procps
utilities crashing with a SIGSEGV if the file2str function in
proc/readproc.c reads zero bytes.

http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/precise/procps
/precise-updates/revision/61

This corresponds to the following procps package version:
1:3.2.8-11ubuntu6.1

Prior to this changeset, file2str would return -1 if the read failed;
now it does not, which is not expected by other parts of the procps
codebase, hence the crash.

Upstream have fixed this issue in the following commit:

https://www.gitorious.org/procps/procps/commit/526bc5dfa924177e68be0123bd67e3370955f924

** Affects: procps (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1242746

Title:
  SIGSEGV when file2str reads zero bytes

Status in “procps” package in Ubuntu:
  New

Bug description:
  The changes made in the following commit, which backported a number of
  changes to the procps package in precise, result in various procps
  utilities crashing with a SIGSEGV if the file2str function in
  proc/readproc.c reads zero bytes.

  http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/precise/procps
  /precise-updates/revision/61

  This corresponds to the following procps package version:
  1:3.2.8-11ubuntu6.1

  Prior to this changeset, file2str would return -1 if the read failed;
  now it does not, which is not expected by other parts of the procps
  codebase, hence the crash.

  Upstream have fixed this issue in the following commit:

  https://www.gitorious.org/procps/procps/commit/526bc5dfa924177e68be0123bd67e3370955f924

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