[Bug 948] high CPU in sshd after tcp_wrappers deny

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=948





------- Additional Comments From atlunde at panix.com  2005-02-19 11:34 -------
I was able to reproduce the problem, by creating a tcp_wrappers deny rule for a
local box, running a test server on a high port, and running the "ab" (apache
benchmark utility) against that port.

In fact it was even easier to mess it up by running "ab" against the port
without the tcp_wrappers deny rule.

This binary was build with the Sun compiler suite, not gcc, so I used the
corresponding "dpx" debugger traceback feature.

It looks like it's looping deep in the random number generation code; several
traces all looked similar.

I suspect the common factor between me and the other case is use of prngd or a
similar daemon, rather than the sun /dev/random patch. This set-up was brought
over from HP-UX which didn't have a /dev/random patch, and the other report is
from HP-UX. Plus, there were syslog errors from prngd.




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