Re: kern/46464: lib/librumphijack/t_tcpip:ssh test case randomly fails

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR kern/46464; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: Antti Kantee <pooka%NetBSD.org@localhost>
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/46464: lib/librumphijack/t_tcpip:ssh test case randomly fails
Date: Sat, 19 Jul 2014 12:11:23 +0300

 Hi Antti,
 
 I have now tracked down the cause of PR 46464 to an assertion failure
 in librumphijack:
 
   assertion "(pfd=5Frump[nfds].revents & POLLIN) =3D=3D 0" failed: file=
  "/tmp/bracket/build/2014.07.16.07.41.43-i386-debug/src/lib/librumphija=
 ck/hijack.c", line 2073, function "=5Fsys=5F=5F=5Fpollts50"
 
 What is the intent of the assertion=3F  It seems to be asserting that
 the two threads can't simultaneously notify each other, but it looks
 like they can.
 
 To reproduce the failure, including the assertion failure message,
 paste the following into a terminal running a root shell:
 
 cd /usr/tests/lib/librumphijack
 ed t=5Ftcpip
 /sbin.sshd/
 s/sshd/sshd -d -o LogLevel=3DDEBUG3 /
 s/$/ 2>\/tmp\/sshd.log \&/
 a
 echo $! >sshd.pid
 =2E
 /save:ssh.out/
 s/out/out -e ignore/
 w
 q
 while atf-run t=5Ftcpip; do true; done
 cat /tmp/sshd.log
 
 --=20
 Andreas Gustafsson, gson%gson.org@localhost