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Rather than checking if the top bit in a virtual address is a 0 or 1

Description

Rather than checking if the top bit in a virtual address is a 0 or 1
compare against VM_MAXUSER_ADDRESS as we should have been doing.

Sponsored by: DARPA, AFRL

Details

Provenance
andrewAuthored on
Parents
rS316768: Fix an out-of-bounds write when a zero-length buffer is passed.
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