Date: Mon, 29 Jun 1998 18:47:56 -0400 From: Jared Mauch <jared@puck.nether.net> To: Bill Fenner <fenner@parc.xerox.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: Problems w/ IMCP sockets Message-ID: <19980629184756.A22923@puck.nether.net> In-Reply-To: <199806241736.KAA07821@mango.parc.xerox.com>; from Bill Fenner on Wed, Jun 24, 1998 at 10:36:51AM -0700 References: <19980623232240.A21485@puck.nether.net> <199806241736.KAA07821@mango.parc.xerox.com>
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On Wed, Jun 24, 1998 at 10:36:51AM -0700, Bill Fenner wrote: > Can you give more specifics? On a 2.2.6 system, I opened 75 raw > ICMP sockets and set SO_RCVBUF to 200Kbytes on each, and then > initiated a flood ping so that I'd get lots and lots of ICMP. I > don't know if 75 is "many, many" or if 200Kbytes is "too high", > and I don't know what OS version you experienced this on, but > nothing untoward happened during my test. I'm running my "sysmond" program (source is at ftp://puck.nether.net/pub/jared/beta/sysmon-0.78.4.12-dev2.tar.gz) with the config file found in there called crashfreebsd.conf When running this, please run it with -d -n, (-d says don't fork, and -n tells it to ignore the e-mail contact info). I just crashed these boxes: FreeBSD punk.nether.net 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Wed Mar 4 12:28:12 EST 1998 jared@punk.nether.net:/usr/src/sys/compile/PUNK i386 FreeBSD irc.cic.net 3.0-980520-SNAP FreeBSD 3.0-980520-SNAP #1: Wed May 27 02:22:15 EDT 1998 jared@irc.cic.net:/usr/src/sys/compile/MYSMP i386 kernel conf files are in that directory also. It's panicing the kernel niceley, and 100% of the time. If you need *any* help at all reproducing this, let me know, i'd be happy to help you crash your system. (program must be run as root to do raw icmp sockets) -- feel free to comment on the "security" of the program directly to me. - Jared To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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