Re: [PATCH] mm: Remove HARDENED_USERCOPY_FALLBACK
From: Kees Cook <hidden>
Date: 2021-09-21 19:01:19
Also in:
linux-hardening, linux-mm, linux-security-module, lkml
On Tue, Sep 21, 2021 at 08:11:49AM +0200, Stephen Kitt wrote:
This has served its purpose and is no longer used. All usercopy
violations appear to have been handled by now, any remaining
instances (or new bugs) will cause copies to be rejected.
This isn't a direct revert of commit 2d891fbc3bb6 ("usercopy: Allow
strict enforcement of whitelists"); since usercopy_fallback is
effectively 0, the fallback handling is removed too.
This also removes the usercopy_fallback module parameter on
slab_common.
Link: https://github.com/KSPP/linux/issues/153
Signed-off-by: Stephen Kitt <redacted>
Suggested-by: Kees Cook <redacted>Thanks for doing this! Acked-by: Kees Cook <redacted> -- Kees Cook