Live patching for Linux 3.20

From https://lkml.org , "In case you haven't read the titlebar of your web browser's window: this site is the (unofficial) Linux Kernel Mailing List archive."

Re: Live patching for Linux 3.20

#5

Post by resc1440 » Tue, Feb 10, 2015, 11:24 PM UTC

And lkml discussion of the follow-up patches: http://lkml.iu.edu/hypermail/linux/kernel/1502.1/00694.html

Re: Live patching for Linux 3.20

#6

Post by peterwwillis » Tue, Feb 10, 2015, 11:58 PM UTC

An interesting case of the Cathedral causing siloed duplication, and the Bazaar creating a better solution without duplication.

Re: Live patching for Linux 3.20

#7

Post by agumonkey » Wed, Feb 11, 2015, 1:37 AM UTC

sigjuice wrote: post #4

SEJeff wrote: post #3

And for those who prefer the official lkml.org link: https://lkml.org/lkml/2015/2/9/534

lkml.org explicitly states that they are unofficial. From https://lkml.org , "In case you haven't read the titlebar of your web browser's window: this site is the (unofficial) Linux Kernel Mailing List archive."

Firefox Nightly doesn't display that neither in the tab name nor the Xwindow title. I'd never have seen this ...

Re: Live patching for Linux 3.20

#8

Post by bjackman » Wed, Feb 11, 2015, 1:39 AM UTC

This is cool as fuck, I didn't know about kpatch or kGraft.

Does anyone know if any other OSs have live kernel patching?

Re: Live patching for Linux 3.20

#9

Post by feld » Wed, Feb 11, 2015, 2:00 AM UTC

bjackman wrote: post #8

This is cool as fuck, I didn't know about kpatch or kGraft. Does anyone know if any other OSs have live kernel patching?

FreeBSD has not gone quite that far, but there was a PoC for loading new kernels without rebooting.

https://www.bsdcan.org/2012/schedule/events/325.en.html

Re: Live patching for Linux 3.20

#10

Post by mkonecny » Wed, Feb 11, 2015, 2:34 AM UTC

Does anyone have a simple example of how this would work? I can't wrap my head around code evolving during runtime for any arbitrary binary change.