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kGraft Live Kernel Patching now available for download



By: ssalgy

March 28, 2014 10:35 am

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SUSE has released kGraft to the public, the technology it developed to deliver live, run-time patching of the Linux kernel. Unlike other technologies, kGraft doesn’t require stopping the kernel even for short periods, making it easier for IT staff to install critical security and other patches without system downtime.

“Originally a research project from SUSE Labs, kGraft has quickly shown its promise as a live patching Linux tool for enterprise users,” said Vojtěch Pavlík, director of SUSE Labs. “Providing quick and reliable response to unscheduled patching needs without requiring the shutting down or rebooting of any number of servers will increase the stability, cost efficiency and security of enterprise customers’ environments. This technology will enhance uptime in mission-critical environments.”

kGraft is based on modern Linux technologies, including INT3/IPI-NMI self-modifying code, an RCU-like update mechanism, mcount-based NOP space allocation and standard kernel module loading/linking mechanisms. By leveraging other Linux technologies, kGraft requires only a small amount of code to run.

Pavlík is speaking about kGraft live kernel patching today at the Linux Foundation’s Collaboration Summit 2014. SUSE will submit kGraft upstream while working with the Linux community to create a common, standard kernel live patching solution. For more information about kGraft and to download the code, visit www.suse.com/kgraft.

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Categories: SUSE Linux Enterprise, SUSE Linux Enterprise Server, Technical Solutions

Disclaimer: As with everything else at SUSE Conversations, this content is definitely not supported by SUSE (so don't even think of calling Support if you try something and it blows up).  It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.

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