rmalloc
rmalloc is a malloc (and calloc, and realloc, and, of course, free)
implementation that improves upon traditional malloc implementations by
taking advantage of the size of modern processor address spaces to provide
cryptographically enhanced security in allocations.
usage
rmalloc is most easily used with a simple LD_PRELOAD - first, get the repo,
then run the program you want to secure like normal, but with
LD_PRELOAD=path/to/librmalloc.so in front of it. for example:
LD_PRELOAD=./target/release/librmalloc.so cargo build
in the rmalloc repo should complete without error.
theory
at its core, rmalloc uses the Mersenne Twister algorithm to randomly select
addresses for allocations. it will then probe to see if the chosen address has
been allocated, and if not, will then allocate it with a high-performance
mmap system call. because the mmap function is implemented inside the Linux
kernel, it is secure to RCE exploits and supply chain (software update)
attacks. because it is in the krenel, it is also fast.
thread safety
rmalloc is thread safe.
no_std
rmalloc is no_std. it is appropriate for embedded usage to replace glibc or other malloc.
the name rmalloc
this is a joke crate. if you'd like the name for pretty much any more serious purpose feel free to email me.