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The trouble with CAP_SYS_RAWIO

Posted Mar 14, 2013 12:55 UTC (Thu) by paulj (subscriber, #341)
Parent article: The trouble with CAP_SYS_RAWIO

Oh, in other fields of computer science, changing semantics of protocols in incompatible ways is often handled through versioning.

I.e. the capability calls need a version flag, perhaps?

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Posted Mar 14, 2013 15:30 UTC (Thu) by paulj (subscriber, #341) [Link]

And looking into this, cap_user_header_t actually has a version field! So this problem may well be fixable without hacks or breakage, if the kernel developers start to consider that the semantic meaning of capabilities, as exposed to user-space, is versioned.