Re: Panic "m_copydata, negative off" out of tcp_output

[Bosko Milekic]

Is this with code before or after the race condition in the sockbuf
  limiting code was fixed?


On Fri, 13 Oct 2000, Greg Lehey wrote:

> I've been having a few panics lately with a PRE_SMPNG snap:

[...]

> Does anybody recognize this?
> 
> Greg
> --
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  Bosko Milekic
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Panic "m_copydata, negative off" out of tcp_output

[Greg Lehey]

I've been having a few panics lately with a PRE_SMPNG snap:

kgdb) bt
#0  dumpsys () at ../../kern/kern_shutdown.c:461
#1  0xc01cf043 in boot (howto=256) at ../../kern/kern_shutdown.c:302
#2  0xc01cf3e5 in panic (fmt=0xc037db85 "m_copydata, negative off %d") at 
../../kern/kern_shutdown.c:550
#3  0xc01edd02 in m_copydata (m=0x0, off=-1, len=1, cp=0xc0cd7970 "xmission\003com") 
at ../../kern/uipc_mbuf.c:766
#4  0xc02356a0 in tcp_output (tp=0xcb54d720) at ../../netinet/tcp_output.c:590
#5  0xc02343f3 in tcp_input (m=0xc0cd7900, off0=20, proto=6) at 
../../netinet/tcp_input.c:2249
#6  0xc022e5d2 in ip_input (m=0xc0cd7900) at ../../netinet/ip_input.c:750
#7  0xc022e62f in ipintr () at ../../netinet/ip_input.c:778

Does anybody recognize this?

Greg
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