[kernel-hardening] [PATCH 4/6] Protectable Memory
From: Igor Stoppa <hidden>
Date: 2018-02-04 15:05:25
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linux-mm, lkml
On 04/02/18 00:29, Boris Lukashev wrote:
On Sat, Feb 3, 2018 at 3:32 PM, Igor Stoppa [off-list ref] wrote:
[...]
quoted
What you are suggesting, if I have understood it correctly, is that, when the pool is protected, the addresses already given out, will become traps that get resolved through a lookup table that is built based on the content of each allocation. That seems to generate a lot of overhead, not to mention the fact that it might not play very well with the MMU.That is effectively what i'm suggesting - as a form of protection for consumers against direct reads of data which may have been corrupted by some irrelevant means. In the context of pmalloc, it would probably be a separate type of ro+verified pool
ok, that seems more like an extension though. ATM I am having problems gaining traction to get even the basic merged :-) I would consider this as a possibility for future work, unless it is said that it's necessary for pmalloc to be accepted ... -- igor -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html