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Sanitizing kernel memorySanitizing kernel memoryPosted May 28, 2009 19:09 UTC (Thu) by anton (guest, #25547)In reply to: Sanitizing kernel memory by gmaxwell Parent article: Sanitizing kernel memory
any userspace app that reads memory handed to it by the kernel before writing it is broken.If the application writes a byte to a line that's not in cache, current CPUs load (the rest of) the cache line from main memory (write allocate). In a few special cases this read can be avoided, but for ordinary writes it happens.
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