Messages in this thread | | | From | Miklos Szeredi <> | Date | Thu, 28 Sep 2023 12:07:17 +0200 | Subject | Re: [RFC PATCH 3/3] add listmnt(2) syscall |
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On Tue, 19 Sept 2023 at 18:48, Paul Moore <paul@paul-moore.com> wrote:
> > Ideally we avoid multiple capable(CAP_SYS_ADMIN) calls by only doing it > > once and saving the return value. capable() call's aren't that cheap. > > Agreed. The capability check doesn't do any subject/object > comparisons so calling it for each mount is overkill. However, I > would think we would want the LSM hook called from inside the loop as > that could involve a subject (@current) and object (individual mount > point) comparison.
The security_sb_statfs() one?
Should a single failure result in a complete failure?
Why is it not enough to check permission on the parent?
Thanks, Miklos
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