1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

A Backdoor In AMD's Catalyst OpenCL Library?

AMD

Published on 13 January 2014 09:58 AM EST
Written by Michael Larabel in AMD
58 Comments

There's a chance there might be a concealed backdoor within AMD's Catalyst driver, in particular within their closed-source graphics driver's OpenCL library.

Developers behind oclHashcat, an open-source password recovery / cracking utility that uses OpenCL and CUDA for being "the world's fastest password cracker", pointed out in a tweet this morning that there's a rather stomach-turning symbol within the AMD Linux OpenCL library.

Spotted was a osTestBackdoorATI string within the libamdocl64.so AMD OpenCL 64-bit library on Linux. The "osTestBackdoorATI" can be easily revealed by running strings on the compiled library, but it's not yet known what exactly AMD is doing with this "test backdoor."

This was pointed out in our forums and as of publishing I have yet to hear back from AMD with any explanation over this "test backdoor" in their binary Linux driver.

UPDATE: According to AMD's Graham Sellers on Twitter, the hook is used for obtaining memory usage statistics during testing.

UPDATE 2: AMD's official statement on this symbol.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Acer B286HK: A 28-inch UHD LED 4K Monitor For As Low As $350
  2. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  3. Intel 120GB 530 Series SSD Linux Performance
  4. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
Latest Linux Articles
  1. Mesa Git Yields Performance Improvements For Newer AMD GPUs
  2. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  3. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  4. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
Latest Linux News
  1. Ubuntu 14.10 MacBook Air Tests With Linux 3.18, Mesa 10.5
  2. AMD Richland APU Support Added To Coreboot
  3. 2014 Holiday Shopping Reminder, Happy Thanksgiving
  4. Python 3 Support Added To The GNOME Shell
  5. ReactOS Lands Its New Explorer Shell
  6. Weston's IVI Shell Sees New Version
  7. IMP Launches As Another Open-Source Computer Attempt
  8. Git 2.2.0 Released With 550+ Changes
  9. GNOME 3.15.2 Released
  10. Quantum OS Aims For A Linux Desktop With QML, Wayland & Material Design
Latest Forum Discussions
  1. Updated and Optimized Ubuntu Free Graphics Drivers
  2. Hurrican SDL Port
  3. Roadmap to Catalyst 14.10 ?
  4. how to configure module phoromatic ?
  5. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  6. Debian Developer Resigns From The Systemd Maintainership Team
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control