[PANIC] 6.0BETA2 in l2ping flood

Andrew Thompson thompsa at freebsd.org
Wed Aug 17 23:18:41 GMT 2005


On Wed, Aug 17, 2005 at 12:41:07PM +0200, Jonatan B wrote:
> This is a repeatable panic I get when l2ping flooding my tungsten.
> Maksim?
> 
> repeatable panic with bluetooth on SMP
> 
> #> l2ping -fa MyTungsten -s 65531
> 

Interesting... I can get exactly the same panic by doing

 ifconfig bridge0 create
  <'tcpdump -i bridge0' on another terminal>
 ifconfig bridge0 up
 ifconfig bridge0 destroy

So far I have been unable to find the cause.

> kernel trap 12 with interrupts disable
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 01
> virtual fault address	= 0xdeadc0e6
> fault code		= supervisor read, page not present
> instruction pointer	= 0x20:0xc06b15b6
> stack pointer		= 0x28:0xe508cc96	# sometimes 0x28:0xe508cc94
> frame pointer		= 0x28:0xe508cccc
> code segment		= base 0x0, limit 0xfffff, type 0x1b
> 			= DPL 0, pres 1, def32 1, gran 1
> processor eflags	= resume, IOPL = 0
> current process		= 37 (swi4: clock sio)
> [thread pid 37 tid 100036 ]
> Stopped at	softclock+0x96: cmpl	%eax,0x8(%ecx)
> db> trace
> Tracing pid 37 tid 100036 td 0xc2340d80
> softclock(0,0,c092b71f,251,e508cd00) at softclock+0x96
> ithread_loop(c2328500,e508cd38,c092b50a,30d,0) at ithread_loop+0x162
> fork_exit(c068b200,c2328500,e508cd38) at fork_exit+0xc1
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xe508cd6c, ebp = 0 ---
> db> 
> 
> 
> Please CC me as I'm not subscribed.
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