Date: 24 Oct 1997 17:11:09 -0500 From: Dave Marquardt <marquard@zilker.net> To: freebsd-hackers@freebsd.org Subject: Re: netstat: kvm_read: Bad address Message-ID: <85zpnyerr6.fsf@localhost.zilker.net> In-Reply-To: Paul Saab's message of "Fri, 24 Oct 1997 15:55:45 -0500 (CDT)" References: <199710242055.PAA08603@elvis.mu.org>
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Paul Saab <paul@mu.org> writes: > and find the bug. Now today I got this while doing a netstat on > another machine with exactly the same hardware configuration as > the one which had the kernel panic but it is running 2.2.5-RELEASE. > > > Active Internet connections > Proto Recv-Q Send-Q Local Address Foreign Address (state) > tcp 0 0 themaneater.com.http 204.184.83.7.1976 ESTABLISHED > tcp 0 8398 themaneater.com.http 204.184.83.7.1975 ESTABLISHED > tcp 0 5650 themaneater.com.http 204.184.83.7.1974 ESTABLISHED > tcp 0 0 themaneater.com.http 208.196.245.66.2658 ESTABLISHED > tcp 0 0 themaneater.com.http 208.196.245.66.2657 ESTABLISHED > tcp 0 0 themaneater.com.ftp-da Mizzou-AS6-17.mi.1232 TIME_WAIT > tcp 361 -266160568 themaneater.com.http 16.211.65.241.2656 -264201400 > tcp 0 -264546048 128.204.64.241.16625 144.105.65.241.39147 CLOSED > netstat: kvm_read: Bad address > ??? > udp 0 0 elvis.4724 elvis.domain > udp 0 0 localhost.domain *.* > udp 0 0 elvis.domain *.* You'll see this on lots of BSD-based systems. netstat reads the items on the tcb (TCP PCB) list one at a time from kernel memory, and the list has changed while you were reading it. No big deal, just a little annoying. To fix it would be painful, I think. -Dave
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