Date: Sun, 29 Feb 2004 22:49:52 -0700 From: Robin Schoonover <end@endif.cjb.net> To: freebsd-current@freebsd.org Subject: extra truss evilness Message-ID: <20040301054953.3391A43D1F@mx1.FreeBSD.org>
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It's possible to panic the system with truss (doesn't appear related to race conditions with truss). It appears that if truss is 'watching' a process, and the process forks, than the system could possibly hang. However this is rare and hard to reproduce. However, if a process truss is 'watching' forks, and then the parent process is interupted (^C), than the system will panic multiple times. This has a much higher likelyhood of occuring. I've been able to reproduce this with the following C snippet: int pid = fork(10); sleep(10); Run, wait a few seconds (so we KNOW we are after fork occurs), then hit ^C. Panic. -- Robin Schoonover (aka End) # # "Freedom of speech in Usenet means that when you shout 'Fire!' in a # crowded theatre, half the crowd stands up and shouts, 'Wrong theatre!'"
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