Re: [PATCH] mm: optionally disable brk()

[David Hildenbrand]

On 05.10.20 13:21, David Laight wrote:
> From: David Hildenbrand
>> Sent: 05 October 2020 10:55
> ...
>>> If hardening and compatibility are seen as tradeoffs, perhaps there
>>> could be a top level config choice (CONFIG_HARDENING_TRADEOFF) for this.
>>> It would have options
>>> - "compatibility" (default) to gear questions for maximum compatibility,
>>> deselecting any hardening options which reduce compatibility
>>> - "hardening" to gear questions for maximum hardening, deselecting any
>>> compatibility options which reduce hardening
>>> - "none/manual": ask all questions like before
>>
>> I think the general direction is to avoid an exploding set of config
>> options. So if there isn't a *real* demand, I guess gluing this to a
>> single option ("CONFIG_SECURITY_HARDENING") might be good enough.
> 
> Wouldn't that be better achieved by run-time clobbering
> of the syscall vectors?

You mean via something like a boot parameter? Possibly yes.

-- 
Thanks,

David / dhildenb