Re: ng_ksocket & WITNESS

On Sun, 4 Jul 2004, Gleb Smirnoff wrote:

>   I can easily reproduce this panic using today's CURRENT and ng_ksocket
> and WITNESS turned on: 

That's not good, your system has entered fairly complex bits of the
network stack without Giant -- in a few days, that may be OK, but today
it's not.  Could you tell us a bit about the network stack configuration
on that machine?  You're definitely using netgraph -- any particular
modules, and are you using features like bridging, etc?

Thanks,

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



> 
> mutex Giant not owned at /usr/src/sys/netinet/udp_usrreq.c:734
> 
> #0  Debugger (msg=0x12 <Address 0x12 out of bounds>) at atomic.h:263
> #1  0xc0563565 in panic (fmt=0xc0701209 "mutex %s not owned at %s:%d")
>     at /usr/src/sys/kern/kern_shutdown.c:543
> #2  0xc0559b4c in _mtx_assert (m=0xc0779320, what=-1056882688, 
>     file=0xc070d665 "/usr/src/sys/netinet/udp_usrreq.c", line=734)
>     at /usr/src/sys/kern/kern_mutex.c:747
> #3  0xc060e47f in udp_output (inp=0xc17af21c, m=0xc172a500, addr=0x0, control=0x0, td=0xc15012c0)
>     at /usr/src/sys/netinet/udp_usrreq.c:734
> #4  0xc060f067 in udp_send (so=0x12, flags=0, m=0xc172a500, addr=0x12, control=0x12, td=0x12)
>     at /usr/src/sys/netinet/udp_usrreq.c:1079
> #5  0xc05a31ed in sosend (so=0xc17ae4f0, addr=0x0, uio=0x0, top=0xc172a500, control=0x0, flags=0, 
>     td=0xc15012c0) at /usr/src/sys/kern/uipc_socket.c:788
> #6  0xc05eb595 in ng_ksocket_rcvdata (hook=0xc19e9380, item=0xc17eb7c0)
>     at /usr/src/sys/netgraph/ng_ksocket.c:917
> #7  0xc05e4fe9 in ng_apply_item (node=0xc19d2800, item=0xc17eb7c0)
>     at /usr/src/sys/netgraph/ng_base.c:2375
> #8  0xc05e4b95 in ng_snd_item (item=0xc17eb7c0, queue=0) at /usr/src/sys/netgraph/ng_base.c:2264
> #9  0xc1a01b09 in ?? ()
> #10 0xc17eb7c0 in ?? ()
> 
> -- 
> Totus tuus, Glebius.
> GLEBIUS-RIPN GLEB-RIPE
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