REDHAT-BUG-652122

First published: Thu Nov 11 2010(Updated: )

Given the right combination of ThinkPad and X.org, just reading the video output control state is enough to hard-crash X.org. Until the day I somehow find out a model or BIOS cut date to not provide this feature to ThinkPads that can do video switching through X RandR, change permissions so that only processes with CAP_SYS_ADMIN can access any sort of video output control state. This bug could be considered a local DoS I suppose, as it allows any non-privledged local user to cause some versions of X.org to hard-crash some ThinkPads. Reported-by: Jidanni &lt;jidanni&gt; Signed-off-by: Henrique de Moraes Holschuh &lt;hmh.br&gt; Cc: stable Upstream commit: <a href="http://git.kernel.org/linus/b525c06cdbd8a3963f0173ccd23f9147d4c384b5">http://git.kernel.org/linus/b525c06cdbd8a3963f0173ccd23f9147d4c384b5</a>

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