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Killswitch: Per-function short-circuit mitigation primitive

[PATCH] killswitch: add per-function short-circuit mitigation primitive Sasha Levin [this message] ` Greg KH ` Sasha Levin ` Greg KH ` Jonathan Corbet ` Sasha Levin ` Joshua Peisach ` Mathieu Desnoyers ` Sasha Levin ` Mathieu Desnoyers ` Sasha Levin ` Mathieu Desnoyers ` Sasha Levin ` Andrew Morton ` Sasha Levin ` Andrew Morton ` Sasha Levin ` Andrew Morton When a (security) issue goes public, fleets stay exposed until a patched kernel is built, distributed, and rebooted into. For many such issues the simplest mitigation is to stop calling the buggy function.

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