Re: [PATCH] mm/mincore: allow for making sys_mincore() privileged
From: Jiri Kosina <jikos@kernel.org>
Date: 2019-01-10 07:54:31
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On Thu, 10 Jan 2019, Dave Chinner wrote:
quoted
Yeah, preadv2(RWF_NOWAIT) is in the same teritory as mincore(), it has "just" been overlooked. I can't speak for Daniel, but I believe he might be ok with rephrasing the above as "Restricting mincore() and RWF_NOWAIT is sufficient ...".Good luck with restricting RWF_NOWAIT. I eagerly await all the fstests that exercise both the existing and new behaviours to demonstrate they work correctly.
Well, we can still resurrect my original aproach of doing this opt-in based on a sysctl setting, and letting the admin choose his poison. If 'secure' mode is selected, RWF_NOWAIT will then probably just always fail wit EAGAIN. -- Jiri Kosina SUSE Labs