About: KGraft

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kGraft is a feature of the Linux kernel that implements live patching of a running kernel, which allows kernel patches to be applied while the kernel is still running. By avoiding the need for rebooting the system with a new kernel that contains the desired patches, kGraft aims to maximize the system uptime and availability. At the same time, kGraft allows kernel-related security updates to be applied without deferring them to scheduled downtimes. Internally, kGraft allows entire functions in a running kernel to be replaced with their patched versions, doing that safely by selectively using original versions of functions to ensure per-process consistency while the live patching is performed.

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  • kGraft es una característica del núcleo Linux que implementa la aplicación de parches en vivo de un kernel en ejecución, lo que permite que se apliquen parches del kernel mientras el kernel aún se está ejecutando. Al evitar la necesidad de reiniciar el sistema con un nuevo núcleo que contiene los parches deseados, kGraft apunta a maximizar el tiempo de actividad y disponibilidad del sistema. Al mismo tiempo, kGraft permite que las actualizaciones de seguridad relacionadas con el kernel se apliquen sin diferirlas a los tiempos de inactividad programados.​​ Internamente, kGraft permite que se reemplacen funciones completas en un kernel en ejecución con sus versiones parcheadas, haciendo esto de forma segura mediante el uso selectivo de las versiones originales de las funciones para asegurar la consistencia del proceso mientras se realiza la aplicación de parches en vivo.​ kGraft es desarrollado por SUSE, con su código fuente bajo los términos de las versiones dos y tres de la Licencia Pública General de GNU (GPL).​​ En abril de 2014, se envió kGraft para su inclusión en la línea principal del núcleo Linux, ​ y los fundamentos minimalistas para la aplicación de parches en vivo se fusionaron en la línea principal del núcleo Linux en la versión 4.0 del kernel, que se publicó el 12 de abril de 2015, en conjunto con kpatch.​ (es)
  • kGraft is a feature of the Linux kernel that implements live patching of a running kernel, which allows kernel patches to be applied while the kernel is still running. By avoiding the need for rebooting the system with a new kernel that contains the desired patches, kGraft aims to maximize the system uptime and availability. At the same time, kGraft allows kernel-related security updates to be applied without deferring them to scheduled downtimes. Internally, kGraft allows entire functions in a running kernel to be replaced with their patched versions, doing that safely by selectively using original versions of functions to ensure per-process consistency while the live patching is performed. kGraft is developed by SUSE, with its source code licensed under the terms of versions two and three of the GNU General Public License (GPL). In April 2014, kGraft was submitted for inclusion into the Linux kernel mainline, and the minimalistic foundations for live patching were merged into the Linux kernel mainline in kernel version 4.0, which was released on April 12, 2015. (en)
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  • 2014-03-27 (xsd:date)
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  • left (en)
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  • Each process is monitored so it executes a patched function consistently within a single system call. (en)
  • Without additional logic in place, not replacing patched functions atomically could lead to inconsistencies. (en)
  • After everything migrates to a new "universe", trampoline-style checks are no longer needed. (en)
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  • "World views" or "universes", maintained by kGraft in a read-copy-update fashion (en)
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  • Linux kernel live patching kGraft1.svg (en)
  • Linux kernel live patching kGraft2.svg (en)
  • Linux kernel live patching kGraft3.svg (en)
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  • GNU GPL versions 2 and 3 (en)
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  • kGraft (en)
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  • 2014-03-27 (xsd:date)
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  • 320 (xsd:integer)
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  • kGraft es una característica del núcleo Linux que implementa la aplicación de parches en vivo de un kernel en ejecución, lo que permite que se apliquen parches del kernel mientras el kernel aún se está ejecutando. Al evitar la necesidad de reiniciar el sistema con un nuevo núcleo que contiene los parches deseados, kGraft apunta a maximizar el tiempo de actividad y disponibilidad del sistema. Al mismo tiempo, kGraft permite que las actualizaciones de seguridad relacionadas con el kernel se apliquen sin diferirlas a los tiempos de inactividad programados.​​ Internamente, kGraft permite que se reemplacen funciones completas en un kernel en ejecución con sus versiones parcheadas, haciendo esto de forma segura mediante el uso selectivo de las versiones originales de las funciones para asegurar (es)
  • kGraft is a feature of the Linux kernel that implements live patching of a running kernel, which allows kernel patches to be applied while the kernel is still running. By avoiding the need for rebooting the system with a new kernel that contains the desired patches, kGraft aims to maximize the system uptime and availability. At the same time, kGraft allows kernel-related security updates to be applied without deferring them to scheduled downtimes. Internally, kGraft allows entire functions in a running kernel to be replaced with their patched versions, doing that safely by selectively using original versions of functions to ensure per-process consistency while the live patching is performed. (en)
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  • KGraft (es)
  • KGraft (en)
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  • kGraft (en)
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