Re: [RFC PATCH] x86/Kconfig: Disable KASLR on debug builds

Borislav Petkov
2023-11-30T12:49:24Z

On Thu, Nov 30, 2023 at 01:08:31PM +0100, Peter Zijlstra wrote:
> Works for me, but I have "nokaslr no_hash_pointers" on all my machines
> by now. It goes right along with "debug ignore_loglevel
> sysrq_always_enabled earlyprintk=serial,ttyS0,115200" :-)

Bah, there's cmdline switches. Lemme add them to all my scripts starting
guests and grub too. Thanks for the hint!

I guess we could still do the Kconfig dependency when we're on new
machines, without the scripts.

Btw, I'm not the only one who's walked right into this one:

config KCOV
bool "Code coverage for fuzzing"

...

If RANDOMIZE_BASE is enabled, PC values will not be stable across
different machines and across reboots. If you need stable PC values,
disable RANDOMIZE_BASE.

--
Regards/Gruss,
Boris.