cap_syslog: accept CAP_SYS_ADMIN for now
In commit ce6ada35 ("security: Define CAP_SYSLOG") Serge Hallyn introduced CAP_SYSLOG, but broke backwards compatibility by no longer accepting CAP_SYS_ADMIN as an override (it would cause a warning and then reject the operation). Re-instate CAP_SYS_ADMIN - but keeping the warning - as an acceptable capability until any legacy applications have been updated. There are apparently applications out there that drop all capabilities except for CAP_SYS_ADMIN in order to access the syslog. (This is a re-implementation of a patch by Serge, cleaning the logic up and making the code more readable) Acked-by: NSerge Hallyn <serge@hallyn.com> Reviewed-by: NJames Morris <jmorris@namei.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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