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

KernelASan: Bringing Address Sanitizer To The Linux Kernel

Linux Kernel

Published on 18 July 2014 09:23 AM EDT
Written by Michael Larabel in Linux Kernel
7 Comments

Work being done by Samsung and other Linux stakeholders is bringing the Address Sanitizer capabilities found in GCC as being useful for detecting potential memory issues within the Linux kernel.

Address Sanitizer is the feature within GCC (and now LLVM/Clang too) for detecting memory corruption bugs like buffer overflows, use-after-free, and other memory errors. Address Sanitizer is successfully used in the real world for finding bugs within Firefox, Chromium, FFmpeg, and many other projects for using this easy memory detection instrumentation within the compiler.

Earlier this month a set of patches were published for supporting the Address Sanitizer for the Linux kernel and introducing new CONFIG_KASAN=y and CONFIG_KASAN_SANITIZE_ALL=y kernel config options. The patches for the kernel currently support finding use-after-free bugs and out-of-bounds read/writes in kmalloc. Not yet wired in but possible to implement for the kernel memory checking code are global buffer overflows, stack buffer overflows, and use after returns.

While these patches aren't yet feature complete, there's already been a number of bugs fixed by Address Sanitizer for the kernel ranging from IPv4/IPv6 code to the EXT4 file-system and AIO. The current kernel patches can be found on the LKML and hopefully they'll get queued up for the Linux 3.17 kernel merge window.

Published today is a small GCC patch for supporting the Kernel Address Sanitizer.

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. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
  2. RadeonSI GLAMOR Benchmarks With X.Org Server 1.16
  3. RadeonSI Gallium3D vs. Catalyst At 4K UHD On Linux
  4. MSAA RadeonSI Gallium3D Performance Preview
Latest Linux News
  1. NVIDIA Releases The 343.22 Linux Driver With GTX 980 Support
  2. NVIDIA Launches The GTX 980: The High-End Maxwell Beauty
  3. X.Org Server Shatter Project Fails
  4. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  5. Fedora 21 Alpha Finally Coming Next Week
  6. Ubuntu Touch/Phone Reaches Its First RTM Image
  7. The KMS Mode-Setting Driver Was Imported For X.Org Server 1.17
  8. SNA & UXA Intel Benchmarks With X.Org Server 1.16
  9. Graphics Driver Changes Coming In The Linux 3.18 Kernel
  10. Tropico 5 Being Released For Linux Gamers This Week
Latest Forum Discussions
  1. Can Linux kill a motherboard?
  2. Stop grabbing my keyboard :(
  3. New Group Calls For Boycotting Systemd
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Best Radeon for a Power Mac G5?
  6. New stress testing utility for GPU's
  7. Hd 6850
  8. support for first generation UVD blocks (RV6xx, RS780, RS880 and RV790)

Close Advertisement

Close Advertisement