Network related panic on FreeBSD 5.3-STABLE/AMD64
Robert Watson
rwatson at freebsd.org
Fri Nov 19 02:52:24 PST 2004
On Fri, 19 Nov 2004, Robert Watson wrote:
>
> 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.
Also, since this is highly reproduceable for you, could you try running
with "options SOCKBUF_DEBUG"? It could be that we're looking at a socket
buffer corruption issue, and this debugging option will catch it earlier
(at some cost to performance).
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Principal Research Scientist, McAfee Research
>
> Thanks!
>
> Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
> robert at 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
> >
>
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