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Subject: [Bug 217435] Users can panic the kernel by tracing kevents with
 unusual arguments.
Date: Wed, 08 Mar 2017 22:32:55 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217435

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
Created attachment 180655
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D180655&action=
=3Dedit
Limit the size of uio's for ktrace events and changes to max ktrio size.

The attached patch worked for me, the test program fails with invalid file
descriptor error instead of panicing debugging kernel.

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