panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
261401 50748 0 0x2 0x4000000 1 syz-fuzzer
*382173 49690 0 0x14000 0x40000200 0K softclock
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8220d011) at panic+0x15c sys/kern/subr_prf.c:207
witness_checkorder(ffffffff8265cf78,1,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821
rw_enter_read(ffffffff8265cf68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111
uvmfault_lookup(ffff800020e268f8,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
uvm_fault(ffffffff8265cf60,100000000,0,2) at uvm_fault+0x7f sys/uvm/uvm_fault.c:524
pageflttrap(ffff800020e26a90,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020e26a90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 pool_cache_list_alloc sys/kern/subr_pool.c:1809 [inline]
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 sys/kern/subr_pool.c:1879
pool_get(ffffffff82660f40,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
sbappendaddr(fffffd806f6d4000,fffffd806f6d4088,ffffffff8229d968,fffffd806b860e00,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804
rtm_sendup(fffffd806f6d4000,fffffd806b860e00,0) at rtm_sendup+0xef sys/net/rtsock.c:594
end trace frame: 0xffff800020e26e40, count: 0
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8220d011) at panic+0x15c sys/kern/subr_prf.c:207
witness_checkorder(ffffffff8265cf78,1,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821
rw_enter_read(ffffffff8265cf68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111
uvmfault_lookup(ffff800020e268f8,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
uvm_fault(ffffffff8265cf60,100000000,0,2) at uvm_fault+0x7f sys/uvm/uvm_fault.c:524
pageflttrap(ffff800020e26a90,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020e26a90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 pool_cache_list_alloc sys/kern/subr_pool.c:1809 [inline]
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 sys/kern/subr_pool.c:1879
pool_get(ffffffff82660f40,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
sbappendaddr(fffffd806f6d4000,fffffd806f6d4088,ffffffff8229d968,fffffd806b860e00,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804
rtm_sendup(fffffd806f6d4000,fffffd806b860e00,0) at rtm_sendup+0xef sys/net/rtsock.c:594
route_input(fffffd806b860e00,0,18) at route_input+0x489 sys/net/rtsock.c:572
rtm_addr(14,ffff800000a0e500) at rtm_addr+0x10b sys/net/rtsock.c:1751
nd6_dad_timer(ffff800000a0e500) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244
timeout_run(ffff800000a24a30) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline]
timeout_run(ffff800000a24a30) at timeout_run+0xc4 sys/kern/kern_timeout.c:490
softclock_thread(ffff800020e189c0) at softclock_thread+0x16a sys/kern/kern_timeout.c:580
end trace frame: 0x0, count: -19
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020e26570
rbx 0xffff800020e26620
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff81c97d9f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xcfe7f2c76d63f4d7
r12 0x3000000008
r13 0xffff800020e26580
r14 0x100
r15 0x1
rip 0xffffffff81a9d458 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020e26560
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (softclock) pid=382173 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
pri=0, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020e19380,0xffff800020e18760
process=0xffff800020e1a000 user=0xffff800020e22000, vmspace=0xffffffff8265cf60
estcpu=0, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
59858 39718 43268 0 2 0 syz-executor.1
43268 489178 50748 0 3 0x82 nanosleep syz-executor.1
82740 130579 50748 0 3 0x82 piperd syz-executor.0
50748 292651 44419 0 3 0x82 kqread syz-fuzzer
50748 150020 44419 0 3 0x4000082 nanosleep syz-fuzzer
50748 364797 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 506231 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 173788 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 344389 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 450336 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 359069 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 447653 44419 0 3 0x4000082 thrsleep syz-fuzzer
50748 261401 44419 0 7 0x4000002 syz-fuzzer
44419 335778 96039 0 3 0x10008a pause ksh
96039 389038 807 0 3 0x92 select sshd
32207 226760 1 0 3 0x100083 ttyin getty
807 406186 1 0 3 0x80 select sshd
99049 302559 68074 74 3 0x100092 bpf pflogd
68074 126058 1 0 3 0x80 netio pflogd
56155 31602 15808 73 3 0x100090 kqread syslogd
15808 27771 1 0 3 0x100082 netio syslogd
78050 311625 1 77 3 0x100090 poll dhclient
44405 296246 1 0 3 0x80 poll dhclient
96084 6100 0 0 3 0x14200 bored smr
33913 200350 0 0 2 0x14200 zerothread
18254 72374 0 0 3 0x14200 aiodoned aiodoned
24813 3513 0 0 3 0x14200 syncer update
88921 440048 0 0 3 0x14200 cleaner cleaner
52518 282209 0 0 3 0x14200 reaper reaper
33049 512459 0 0 3 0x14200 pgdaemon pagedaemon
20268 22259 0 0 3 0x14200 bored crynlk
6123 392152 0 0 3 0x14200 bored crypto
42194 360140 0 0 3 0x40014200 acpi0 acpi0
52262 241693 0 0 3 0x40014200 idle1
70750 122461 0 0 3 0x14200 bored softnet
48760 337295 0 0 3 0x14200 bored systqmp
47661 363273 0 0 3 0x14200 bored systq
*49690 382173 0 0 7 0x40014200 softclock
49749 489347 0 0 3 0x40014200 idle0
1 197911 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex mbufpl r = 0 (0xffffffff82661038)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 pool_cache_get+0xa3 pl_enter_try sys/kern/subr_pool.c:109 [inline]
#2 pool_cache_get+0xa3 pool_list_enter sys/kern/subr_pool.c:1789 [inline]
#2 pool_cache_get+0xa3 pool_cache_list_alloc sys/kern/subr_pool.c:1806 [inline]
#2 pool_cache_get+0xa3 sys/kern/subr_pool.c:1879
#3 pool_get+0x91 sys/kern/subr_pool.c:572
#4 m_get+0x4c sys/kern/uipc_mbuf.c:250
#5 sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804
#6 rtm_sendup+0xef sys/net/rtsock.c:594
#7 route_input+0x489 sys/net/rtsock.c:572
#8 rtm_addr+0x10b sys/net/rtsock.c:1751
#9 nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244
#10 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline]
#10 timeout_run+0xc4 sys/kern/kern_timeout.c:490
#11 softclock_thread+0x16a sys/kern/kern_timeout.c:580
#12 proc_trampoline+0x1c
Process 49690 (softclock) thread 0xffff800020e189c0 (382173)
exclusive rwlock netlock r = 0 (0xffffffff82489288)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 nd6_dad_timer+0x34 sys/netinet6/nd6_nbr.c:1170
#2 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline]
#2 timeout_run+0xc4 sys/kern/kern_timeout.c:490
#3 softclock_thread+0x16a sys/kern/kern_timeout.c:580
#4 proc_trampoline+0x1c
shared rwlock timeout r = 0 (0xffffffff824b76b0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 timeout_run+0xb9 sys/kern/kern_timeout.c:489
#2 softclock_thread+0x16a sys/kern/kern_timeout.c:580
#3 proc_trampoline+0x1c
exclusive kernel_lock &kernel_lock r = 2 (0xffffffff82673698)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 softclock_thread+0x103 sys/kern/kern_timeout.c:575
#5 proc_trampoline+0x1c
exclusive mutex mbufpl r = 0 (0xffffffff82661038)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 pool_cache_get+0xa3 pl_enter_try sys/kern/subr_pool.c:109 [inline]
#2 pool_cache_get+0xa3 pool_list_enter sys/kern/subr_pool.c:1789 [inline]
#2 pool_cache_get+0xa3 pool_cache_list_alloc sys/kern/subr_pool.c:1806 [inline]
#2 pool_cache_get+0xa3 sys/kern/subr_pool.c:1879
#3 pool_get+0x91 sys/kern/subr_pool.c:572
#4 m_get+0x4c sys/kern/uipc_mbuf.c:250
#5 sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804
#6 rtm_sendup+0xef sys/net/rtsock.c:594
#7 route_input+0x489 sys/net/rtsock.c:572
#8 rtm_addr+0x10b sys/net/rtsock.c:1751
#9 nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244
#10 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline]
#10 timeout_run+0xc4 sys/kern/kern_timeout.c:490
#11 softclock_thread+0x16a sys/kern/kern_timeout.c:580
#12 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9487 6404K 6407K 78643K 10586 0
pcb 13 8K 8K 78643K 23 0
rtable 105 3K 3K 78643K 208 0
ifaddr 53 11K 12K 78643K 57 0
counters 43 33K 33K 78643K 43 0
ioctlops 0 0K 4K 78643K 1469 0
iov 0 0K 12K 78643K 14 0
mount 1 1K 1K 78643K 1 0
vnodes 1217 77K 77K 78643K 1227 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 5 0K 0K 78643K 6 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 51 0
proc 59 63K 83K 78643K 445 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 33 2K 2K 78643K 33 0
ether_multi 1 0K 0K 78643K 2 0
mrt 0 0K 0K 78643K 3 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 1K 78643K 207 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 111 22K 22K 78643K 1071 0
UVM aobj 8 2K 2K 78643K 8 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 9 0K 0K 78643K 12 0
temp 75 3040K 3104K 78643K 2052 0
kqueue 3 4K 8K 78643K 5 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 25 0 23 1 0 1 1 0 8 0
rtentry 112 46 0 2 2 0 2 2 0 8 0
unpcb 120 43 0 33 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 439 0 439 1 0 1 1 0 8 1
tcpcb 544 16 0 12 1 0 1 1 0 8 0
inpcb 280 59 0 52 1 0 1 1 0 8 0
rttmr 72 1 0 1 1 0 1 1 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 1 1 0 8 1
swfcl 56 2 0 0 1 0 1 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 14 0 0 1 0 1 1 0 8 0
pfstkey 112 14 0 0 1 0 1 1 0 8 0
pfstate 328 14 0 0 2 0 2 2 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 188 0 0 12 0 12 12 0 8 0
art_table 32 189 0 0 2 0 2 2 0 8 0
art_node 16 45 0 5 1 0 1 1 0 8 0
semapl 112 4 0 1 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1459 0 53 89 0 89 89 0 8 0
ffsino 272 1459 0 53 94 0 94 94 0 8 0
nchpl 144 1708 0 101 60 0 60 60 0 8 0
uvmvnodes 72 1505 0 0 28 0 28 28 0 8 0
vnodes 208 1505 0 0 80 0 80 80 0 8 0
namei 1024 4443 0 4443 1 0 1 1 0 8 1
percpumem 16 32 0 0 1 0 1 1 0 8 0
scxspl 192 4328 0 4328 2 1 1 2 0 8 1
plimitpl 152 17 0 9 1 0 1 1 0 8 0
sigapl 424 266 0 235 4 0 4 4 0 8 0
futexpl 56 382 0 382 1 0 1 1 0 8 1
knotepl 112 63 0 44 1 0 1 1 0 8 0
kqueuepl 144 8 0 6 1 0 1 1 0 8 0
pipelkpl 48 81 0 71 1 0 1 1 0 8 0
pipepl 120 162 0 143 1 0 1 1 0 8 0
fdescpl 496 251 0 235 3 0 3 3 0 8 0
filepl 0 1261 0 1161 5 0 5 5 0 8 1
lockfpl 104 17 0 16 1 0 1 1 0 8 0
lockfspl 48 8 0 7 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 69 0 60 1 0 1 1 0 8 0
zombiepl 144 235 0 235 1 0 1 1 0 8 1
processpl 984 266 0 235 5 0 5 5 0 8 1
procpl 624 300 0 260 4 0 4 4 0 8 0
sockpl 400 129 0 110 3 0 3 3 0 8 1
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 184 0 0 22 0 22 22 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 211 0 0 13 0 13 13 0 8 0
bufpl 280 3323 0 134 228 0 228 228 0 8 0
anonpl 16 37460 0 23606 57 1 56 56 0 124 0
amapchunkpl 152 1159 0 1031 8 0 8 8 0 158 1
amappl16 192 946 0 203 38 0 38 38 0 8 0
amappl15 184 2 0 0 1 0 1 1 0 8 0
amappl14 176 35 0 26 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 7 0 3 1 0 1 1 0 8 0
amappl11 152 54 0 38 1 0 1 1 0 8 0
amappl10 144 16 0 13 1 0 1 1 0 8 0
amappl9 136 398 0 395 1 0 1 1 0 8 0
amappl8 128 344 0 317 1 0 1 1 0 8 0
amappl7 120 124 0 113 1 0 1 1 0 8 0
amappl6 112 25 0 20 1 0 1 1 0 8 0
amappl5 104 146 0 130 1 0 1 1 0 8 0
amappl4 96 490 0 463 1 0 1 1 0 8 0
amappl3 88 98 0 93 1 0 1 1 0 8 0
amappl2 80 1005 0 941 2 0 2 2 0 8 0
amappl1 72 15785 0 15349 23 6 17 18 0 8 7
amappl 80 550 0 510 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 7 0 0 1 0 1 1 0 8 0
uaddrrnd 24 251 0 235 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 251 0 235 1 0 1 1 0 8 0
vmmpekpl 168 6011 0 5982 2 0 2 2 0 8 0
vmmpepl 168 37454 0 35599 108 4 104 104 0 357 21
vmsppl 368 250 0 235 2 0 2 2 0 8 0
pdppl 4096 510 0 470 6 0 6 6 0 8 0
pvpl 32 135999 0 119035 138 0 138 138 0 265 0
pmappl 232 250 0 235 2 0 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 259 0 3 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8220d011) at panic+0x15c sys/kern/subr_prf.c:207
witness_checkorder(ffffffff8265cf78,1,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821
rw_enter_read(ffffffff8265cf68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:111
uvmfault_lookup(ffff800020e268f8,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
uvm_fault(ffffffff8265cf60,100000000,0,2) at uvm_fault+0x7f sys/uvm/uvm_fault.c:524
pageflttrap(ffff800020e26a90,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020e26a90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 pool_cache_list_alloc sys/kern/subr_pool.c:1809 [inline]
pool_cache_get(ffffffff82660f40) at pool_cache_get+0x118 sys/kern/subr_pool.c:1879
pool_get(ffffffff82660f40,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
sbappendaddr(fffffd806f6d4000,fffffd806f6d4088,ffffffff8229d968,fffffd806b860e00,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804
rtm_sendup(fffffd806f6d4000,fffffd806b860e00,0) at rtm_sendup+0xef sys/net/rtsock.c:594
route_input(fffffd806b860e00,0,18) at route_input+0x489 sys/net/rtsock.c:572
rtm_addr(14,ffff800000a0e500) at rtm_addr+0x10b sys/net/rtsock.c:1751
nd6_dad_timer(ffff800000a0e500) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244
timeout_run(ffff800000a24a30) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline]
timeout_run(ffff800000a24a30) at timeout_run+0xc4 sys/kern/kern_timeout.c:490
softclock_thread(ffff800020e189c0) at softclock_thread+0x16a sys/kern/kern_timeout.c:580
end trace frame: 0x0, count: -19
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0xc000515b10, count: 12
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0xc000515b10, count: -3