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From: Robert Watson <rwatson@freebsd.org>
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To: Slawek Zak <zaks@prioris.mini.pw.edu.pl>
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cc: stable@freebsd.org
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Subject: Re: Network related panic on FreeBSD 5.3-STABLE/AMD64
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On Fri, 19 Nov 2004, Slawek Zak wrote:

> I can reproduce it easily,
> 
> The panic message and backtrace is:

Could I get you to convert the symbol+offsets below to line numbers using
gdb on a copy of your kernel with debugging symbols?  In particular, the
offsets into tcp_output, tcp_input, and ip_input. 

Thanks!

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Principal Research Scientist, McAfee Research


> 
> 	panic: m_copym, offset > size of mbuf chain
> 	cpuid = 1
> 	KDB: enter: panic
> 	[thread 100025]
> 	Stopped at      kdb_enter+0x2f: nop
> 	db> trace
> 	kdb_enter() at kdb_enter+0x2f
> 	panic() at panic+0x249
> 	m_copym() at m_copym+0x1b1
> 	tcp_output() at tcp_output+0xce8
> 	tcp_input() at tcp_input+0x2d95
> 	ip_input() at ip_input+0x10f
> 	netisr_processqueue() at netisr_processqueue+0x17
> 	swi_net() at swi_net+0x116
> 	ithread_loop() at ithread_loop+0xd9
> 	fork_exit() at fork_exit+0xc3
> 	fork_trampoline() at fork_trampoline+0xe
> 	--- trap 0, rip = 0, rsp = 0xffffffffb19bad00, rbp = 0 ---
> 
> I was able to collect a coredump, if it helps, I can make it available
> to interrested parties along with kernel.debug.
> 
> The machine is 2 processor SunFire V20z, debug.mpsafenet is 0.
> 
> TIA, /S
>