panic[cpu0]/thread=30002fda340: BAD TRAP: type=31 rp=2a1007ece30 addr=4 mmu_fsr=0 occurred in module "afs" due to a NULL pointer dereference

nfsd: trap type = 0x31
addr=0x4
pid=645, pc=0x7b27d300, sp=0x2a1007ec6d1, tstate=0x9980001607, context=0x525
g1-g7: 0, 0, 0, 1080, 7ffffc00, 525, 30002fda340

000002a1007ecb50 unix:die+78 (31, 2a1007ece30, 4, 0, 2a1007ecc10, 107b000)
 %l0-3: 0000000000001fff 0000000000000031 0000000001000000 0000000000002000
 %l4-7: 000000000181a4f8 000000000181a400 0000000000000000 0000009980001607
000002a1007ecc30 unix:trap+9d4 (2a1007ece30, 5, 1fff, 1c00, 0, 1)
 %l0-3: 0000000000000000 000003000375e4a8 0000000000000031 0000000000000000
 %l4-7: ffffffffffffe000 0000000000000000 0000000000000001 0000000000000005
000002a1007ecd80 unix:ktl0+48 (14fc1, 14fc1, 4, a, a, 1814000)
 %l0-3: 0000000000000000 0000000000001400 0000009980001607 000000000101aee0
 %l4-7: 00000000e0000000 0000000000000001 0000000000000000 000002a1007ece30
000002a1007eced0 genunix:cpu_update_pct+c0 (0, 30003729890, ffffffffffffffff, 6, 6, 30002934f80)
 %l0-3: 0000000000000000 0000000000000007 0000000000000000 0000000000005960
 %l4-7: 0000000000000000 0000000000013219 0000000000000000 0000000000014fc0
000002a1007ecf90 afs:nfs3_to_afs_call+1b4 (3, 2a1007ed500, 2a1007ed168, 2a1007ed160, 2a1007ed500, 0)
 %l0-3: 000000007b27d454 000000007b27d650 0000000000000008 0000000000000006
 %l4-7: 00000300028d13d8 0000000000000000 000003000310a231 0000000000000000
000002a1007ed090 afs:afs_nfs3_dispatcher+a8 (0, 3, 2a1007ed500, 2a1007ed298, 2a1007ed698, 80782030)
 %l0-3: 0000000000000000 0000030001de7858 0000000000000024 00000300038063c0
 %l4-7: 0000000000000000 0000030001de7858 0000000000000000 0000000000000000
000002a1007ed1b0 afs:afs_xserver+ad650c4 (2a1007ed500, 2a1007ed398, 30003729560, 2a1007ed698, 30003729820, 1)
 %l0-3: 000002a1007ed532 0000000000000004 00000000704fb000 00000000704fb000
 %l4-7: 0000030004d45658 0000000000000002 0000000000000028 0000000000000001
000002a1007ed2b0 nfssrv:common_dispatch+564 (2a1007ed698, 300054d8540, 0, 30004d45580, 704fe1b8, 0)
 %l0-3: 000002a1007ed530 00000000704fc910 00000300033b4b40 000002a1007ed398
 %l4-7: 0000030003729820 0000000000000011 000000007b27dd28 000002a1007ed398
000002a1007ed5d0 rpcmod:svc_getreq+1c8 (300054d8540, 300028d13c0, 30002e26c50, 30005675c00, 18ecd90, 30002e26ac0)
 %l0-3: 0000000000000000 0000030002e26ac0 0000000000000000 0000000000000001
 %l4-7: 0000000000000000 000000007b79b1bc 000000000185e800 0000030002e26de0
000002a1007ed720 rpcmod:svc_run+198 (300052a3428, 0, 0, 0, 300052a3460, 1)
 %l0-3: 000003000375e4a8 00000300052a3470 00000300054d8540 0000030005675c00
 %l4-7: 0000000000000000 0000000000000000 0000000000000001 00000300028d13c0
000002a1007ed7d0 nfs:nfssys+1c4 (c, 1, 7b723800, c, 1f8, 30)
 %l0-3: 0000000000000000 0000000000000000 00000000d2240000 000000000000d224
 %l4-7: 0000000000000001 0000000000000000 0000000000000000 000000007b723918