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Date: Wed, 21 Dec 2011 23:10:42 +0100
From: Petr Matousek <>
Subject: CVE Request -- kernel: tight loop and no preemption can cause system

A tight loop in user level process isn't preempted unless a realtime
process is woken up on the cpu.  Some important kernel threads such as
events/*, kblockd/* can be blocked by the process, and the machine

Unprivileged local user could use this flaw to DoS the system.

Upstream commit:


Petr Matousek / Red Hat Security Response Team

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