[Cryptography] Digital dyes for tracing digital leaks ?

Dan McDonald danmcd at kebe.com
Thu Jan 10 12:54:52 EST 2019


Not as sophisticated as the linear spanning you're proposing, but the illumos (nee OpenSolaris) slab memory allocator has had leak-allocation-use-after-free-debugging for years.

Here're the header files with the patterns:

	http://src.illumos.org/source/xref/illumos-gate/usr/src/uts/common/sys/kmem_impl.h

	http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libumem/common/umem_impl.h

Coredumps with the memory debugging enabled allow post-mortem commands like ::findleaks in mdb to do just that.

Here's a 15 year old blog post describing it for userspace:

	http://dtrace.org/blogs/ahl/2004/07/13/number-11-of-20-libumem/

Dan



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