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A comment on Energizer battery charger contains backdoor. Parent comment

Re:Energizer battery charger contains backdoor by jey on Tuesday March 09, 2010 @03:50PM (#1179328)
Er, DMA isn't controlled by the TLB using the usual page table for access permissions? If not, PCs are ridiculously broken.
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Re:Energizer battery charger contains backdoor by wendroid on Thursday March 11, 2010 @01:01PM (#1184393)
You can read write system memory at addresses that fit in 32bits even when the Kernel has crashed.
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