Comment #5 on issue 348 by [email protected]: asan does not always
detect access beyond mmaped page
https://code.google.com/p/address-sanitizer/issues/detail?id=348
tampering with mmap is risky.
If a user mmaps 32K small regions we will create 32K (or 64K?) redzone
pages and will exhaust the kernel limit of contiguous mappings.
This can be done under a flag though -- a patch is welcome.
Most of the code we care about does not use mmap directly so this
has never been a priority for us.
(glider, seccomp-bpf is a completely different story, let's not mix it here)
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