freebsd stable - Dec 2006 - panic: bus_dmamap_load_mbuf_sg still there

Hi,

this panic has been reported a few times in the past, both by me and
other people; I just updated my Soekris box to 6.2-RC2 and it's still
happening.

panic: bus_dmamap_load_mbuf_sg: no mbuf packet header!
KDB: stack backtrace:
panic(c06128c3,c060f93c,c055b9af,c0db804e,c0db803e,...) at panic+0xef
bus_dmamap_load_mbuf_sg(c0d18e00,0,c0db8000,c0d627d8,c0d627b8,1) at
bus_dmamap_load_mbuf_sg+0x4ec
ath_start(c0d55000,35000,36,0,c1000000,...) at ath_start+0x26f
ether_output_frame(c0d55000,c0fee600,c1000006,0,1,...) at
ether_output_frame+0x226
ether_output(c0d55000,c0fee600,c56f6bb0,c0feb840) at ether_output+0x2de
ip_output(c0fee600,0,c56f6bac,1,0,0) at ip_output+0xaad
ip_forward(c0cf9648,c56f6c78,c04e14dd,c066ca40,1,...) at ip_forward+0x120
ip_input(c0fee600,18,c0673378,c56f6cec,c0541fd7,...) at ip_input+0x8d5
netisr_processqueue(c0d12240,c0cef400,0,c56f6d0c,c04bd93b,...) at
netisr_processqueue+0x13
swi_net(0,c0cef438,c0cfaa80,c04bd740,c0cf9648,...) at swi_net+0x97
ithread_loop(c0ce8750,c56f6d38,c0ce8750,c04bd740,0,...) at ithread_loop+0x1fb
fork_exit(c04bd740,c0ce8750,c56f6d38) at fork_exit+0x83
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xc56f6d6c, ebp = 0 ---
KDB: enter: panic
[thread pid 13 tid 100003 ]
Stopped at      kdb_enter+0x2c: leal    0(%esi),%esi


It has been suggested that it may be pf-related, but I don't have a
clue on how to go about digging more info out.
Any idea?

Bye,
	Andrea

-- 
If it's there, and you can see it, it's real. If it's not there, and
you can see it, it's virtual. If it's there, and you can't see it,
it's transparent. If it's not there, and you can't see it, you
erased it.

I have a Soekris board, so I'm interested.  What's the PR number for the
bug?  How frequently does it occur?

  It is good to log all of the details to the PR.

----- Andrea Campi <andrea+freebsd_stable@webcom.it>
wrote:
> Hi,
> 
> this panic has been reported a few times in the past, both by me and
> other people; I just updated my Soekris box to 6.2-RC2 and it's still
> happening.
> 
> panic: bus_dmamap_load_mbuf_sg: no mbuf packet header!
> KDB: stack backtrace:
> panic(c06128c3,c060f93c,c055b9af,c0db804e,c0db803e,...) at panic+0xef
> bus_dmamap_load_mbuf_sg(c0d18e00,0,c0db8000,c0d627d8,c0d627b8,1) at
> bus_dmamap_load_mbuf_sg+0x4ec
> ath_start(c0d55000,35000,36,0,c1000000,...) at ath_start+0x26f
> ether_output_frame(c0d55000,c0fee600,c1000006,0,1,...) at
> ether_output_frame+0x226
> ether_output(c0d55000,c0fee600,c56f6bb0,c0feb840) at
> ether_output+0x2de
> ip_output(c0fee600,0,c56f6bac,1,0,0) at ip_output+0xaad
> ip_forward(c0cf9648,c56f6c78,c04e14dd,c066ca40,1,...) at
> ip_forward+0x120
> ip_input(c0fee600,18,c0673378,c56f6cec,c0541fd7,...) at
> ip_input+0x8d5
> netisr_processqueue(c0d12240,c0cef400,0,c56f6d0c,c04bd93b,...) at
> netisr_processqueue+0x13
> swi_net(0,c0cef438,c0cfaa80,c04bd740,c0cf9648,...) at swi_net+0x97
> ithread_loop(c0ce8750,c56f6d38,c0ce8750,c04bd740,0,...) at
> ithread_loop+0x1fb
> fork_exit(c04bd740,c0ce8750,c56f6d38) at fork_exit+0x83
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xc56f6d6c, ebp = 0 ---
> KDB: enter: panic
> [thread pid 13 tid 100003 ]
> Stopped at      kdb_enter+0x2c: leal    0(%esi),%esi
> 
> 
> It has been suggested that it may be pf-related, but I don't have a
> clue on how to go about digging more info out.
> Any idea?
> 
> Bye,
> 	Andrea
> 
> -- 
> If it's there, and you can see it, it's real. If it's not
there, and
> you can see it, it's virtual. If it's there, and you can't see
it,
> it's transparent. If it's not there, and you can't see it, you
erased
> it.
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