Page fault in syncache_drop

[Kris Kennaway]

8-core amd64, up-to-date CVS sources

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff803134b4
stack pointer           = 0x10:0xffffffffabe09890
frame pointer           = 0x10:0xffffffffabe098a0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 37 (irq31: bge0)
[thread pid 37 tid 100043 ]
Stopped at      syncache_drop+0x4:      cmpq    $0,(%rdi)
db> wh
Tracing pid 37 tid 100043 td 0xffffff00b9409580
syncache_drop() at syncache_drop+0x4
syncache_add() at syncache_add+0x263
tcp_input() at tcp_input+0x7e0
ip_input() at ip_input+0x69d
netisr_dispatch() at netisr_dispatch+0x51
ether_demux() at ether_demux+0x19f
ether_input() at ether_input+0x3a8
bge_rxeof() at bge_rxeof+0x3ad
bge_intr() at bge_intr+0x11b
ithread_execute_handlers() at ithread_execute_handlers+0x15d
ithread_loop() at ithread_loop+0x69
fork_exit() at fork_exit+0x93
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffffffabe09d30, rbp = 0 ---

Kris
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