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Do we really want more runtime patching?

Do we really want more runtime patching?

Posted May 8, 2026 18:43 UTC (Fri) by MarcB (subscriber, #101804)
In reply to: Do we really want more runtime patching? by gus3
Parent article: killswitch for short-term emergency vulnerability mitigation

With disabling modules, I mean /sbin/sysctl -w kernel.modules_disabled = 1, as soon as all relevant modules are loaded at boot.

For what it's worth, we now reconfigured some test systems that way. We had to explicitly load some modules early (before, they were loaded on demand). It seems viable, at least in a virtualized environment.


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Do we really want more runtime patching?

Posted May 9, 2026 5:24 UTC (Sat) by PlaguedByPenguins (subscriber, #3577) [Link]

FWIW our HPC systems have disabled module loads for years. maybe a decade.
# no more module loads...
echo 1 > /proc/sys/kernel/modules_disabled

# there's also no point in khelper calling out to modprobe
echo > /proc/sys/kernel/modprobe


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