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Remove risky compatability with old kernels.
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Authored by brooks on Sep 1 2020, 10:26 PM.

Details

Summary

The badsys() handler for SIGSYS was added as a transtion aid for kernels
lacking sysctl() in 1993. It is unsafe and unsound so remove it rather
than running the risk of a privilege-dropping system call being silently
omitted.

This partially reverts SCCSID 6.12 (Berkeley) 03/03/93 "add code to
change the system security level".

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Repository
rS FreeBSD src repository
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Event Timeline

brooks created this revision.

I found this when discussing the implications of D26288.

It was a horrible hack at the time and should have been tossed decades ago.

This revision is now accepted and ready to land.Sep 1 2020, 11:17 PM
This revision was automatically updated to reflect the committed changes.