From owner-freebsd-hackers@FreeBSD.ORG  Wed May 18 19:53:23 2005
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Date: Thu, 19 May 2005 05:53:12 +1000
From: Peter Jeremy <PeterJeremy@optushome.com.au>
To: Jamie Heckford <jamie@tridentmicrosystems.co.uk>
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Subject: Re: 5.4-RC2 freezing - ATA related?
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On Wed, 2005-May-18 16:03:16 +0100, Jamie Heckford wrote:
>Managed to get a dump on our system for a similar prob we are getting:

That traceback looks like a panic, not a deadlock.  What was the panic
message?

>#2  0xc0513474 in panic (fmt=0xc06c3da5 "%s") at /usr/src/sys/kern/kern_shutdown.c:566
...
>#7  0xc0510018 in crcopy () at /usr/src/sys/kern/kern_prot.c:1810
>#8  0xc0598c77 in in_pcbdetach (inp=0xc0743a40) at /usr/src/sys/netinet/in_pcb.c:720
>#9  0xc05b21a6 in tcp_close (tp=0x0) at /usr/src/sys/netinet/tcp_subr.c:783

There's something wrong here:  If tcp_close() is passed NULL it will panic
at this point when it tries to dereference tp.

>#10 0xc05ae560 in tcp_input (m=0xc3a6a300, off0=20) at /usr/src/sys/netinet/tcp_input.c:2308
>#11 0xc05a5aed in ip_input (m=0xc3a6a300) at /usr/src/sys/netinet/ip_input.c:776
>#12 0xc0582f13 in netisr_processqueue (ni=0xc0742498) at /usr/src/sys/net/netisr.c:233
>#13 0xc058310a in swi_net (dummy=0x0) at /usr/src/sys/net/netisr.c:346

-- 
Peter Jeremy