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[Bug 1031718] Re: Obscure error messages caused by ubuntu patch

 

So. Apparently this has been "fixed" somewhere along the road to Ubuntu
14.04.

The patch is commented out in the debian/patches/series file in version 1.3.0-0ubuntu2.
However, the debian/changelog doesn't tell me when that happened (or when it was added, for that matter).

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https://bugs.launchpad.net/bugs/1031718

Title:
  Obscure error messages caused by ubuntu patch

Status in “libjpeg-turbo” package in Ubuntu:
  Confirmed

Bug description:
  Environment:
  Description:    Ubuntu 12.04 LTS
  Release:        12.04
  libjpeg-turbo8                      1.1.90+svn733-0ubuntu4.1

  Ubuntu's own patch (FixLibraryStartup.patch) causes obscure "Error
  opening file for reading: Permission denied" error messages.

  The patch adds some auxv related stuff to the library init that
  attempt to read /proc/self/auxv. If it fails the above error is
  printed usually ending up to application's log that's using the
  library. Looking at the log it's completely unclear where that error
  came from and what file was it trying to read.

  The /proc/self/auxv has 0400 permissions and is owned by the user who
  started the process. If the process drops privileges and setuid()'s to
  another user, the file is no longer readable.

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