On Mon, Oct 26, 2020 at 06:05:18PM +0200, Topi Miettinen wrote: > Writing a new value of 3 to /proc/sys/kernel/randomize_va_space > enables full randomization of memory mappings created with mmap(NULL, > ...). With 2, the base of the VMA used for such mappings is random, > but the mappings are created in predictable places within the VMA and > in sequential order. With 3, new VMAs are created to fully randomize > the mappings. Also mremap(..., MREMAP_MAYMOVE) will move the mappings > even if not necessary. Is this worth it? https://www.ndss-symposium.org/ndss2017/ndss-2017-programme/aslrcache-practical-cache-attacks-mmu/
