>>108582644
cause malloc to fail with this?
If MCL_FUTURE has been specified, then a later system call (e.g.,
mmap(2), sbrk(2), malloc(3)), may fail if it would cause the
number of locked bytes to exceed the permitted maximum (see
below). In the same circumstances, stack growth may likewise
fail: the kernel will deny stack expansion and deliver a SIGSEGV
signal to the process.