panic: tcpp_aonuitpc:u kt
ernStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*165655 64035 32767 0x10 0x4000000 0 syz-executor.3
501794 1800 0 0x14000 0x200 1 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: 6
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
*cpu0: tcp_output
cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: -9
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e4c7070
rbx 0xffffffff829a1b8f cpu_info_full_primary+0x2b8f
rdx 0xffff800000be3580
rcx 0
rax 0xffff800029a3a2a0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xe0d0bff94bb59795
r11 0x12352e22533b9099
r12 0xffffffff829a1990 cpu_info_full_primary+0x2990
r13 0
r14 0
r15 0x1
rip 0xffffffff81a16d08 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e4c7060
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.3) pid=165655 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=32, usrpri=79, nice=20
forw=0xffffffffffffffff, list=0xffff800029a60a90,0xffff800029a3ba50
process=0xffff800029a0e580 user=0xffff80002e4c2000, vmspace=0xfffffd8070012180
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
10871 379600 82669 32767 2 0x10 syz-executor.6
10871 521758 82669 32767 3 0x4000090 fsleep syz-executor.6
48789 188911 51180 32767 2 0x10 syz-executor.2
62533 120742 32081 32767 2 0x10 syz-executor.5
62533 504520 32081 32767 3 0x4000090 fsleep syz-executor.5
62533 247320 32081 32767 3 0x4000090 fsleep syz-executor.5
13962 359224 52714 32767 2 0x10 syz-executor.7
13962 168711 52714 32767 3 0x4000090 fsleep syz-executor.7
64035 35846 98765 32767 2 0x10 syz-executor.3
*64035 165655 98765 32767 7 0x4000010 syz-executor.3
82404 62424 49087 32767 3 0x90 nanoslp syz-executor.1
49087 174381 59431 0 3 0x82 wait syz-executor.1
10616 500751 0 0 3 0x14200 bored sosplice
98765 278653 66929 32767 2 0x10 syz-executor.3
82669 65544 48597 32767 3 0x90 nanoslp syz-executor.6
52714 475989 65857 32767 2 0x10 syz-executor.7
65857 486969 59431 0 3 0x82 wait syz-executor.7
48597 403657 59431 0 3 0x82 wait syz-executor.6
32081 236241 50362 32767 3 0x90 nanoslp syz-executor.5
50362 442112 59431 0 3 0x82 wait syz-executor.5
51180 459 8226 32767 3 0x90 nanoslp syz-executor.2
66929 60483 59431 0 3 0x82 wait syz-executor.3
89036 328637 83051 32767 3 0x90 nanoslp syz-executor.4
8226 278723 59431 0 3 0x82 wait syz-executor.2
70565 183988 75210 32767 2 0x10 syz-executor.0
83051 68158 59431 0 3 0x82 wait syz-executor.4
75210 267164 59431 0 3 0x82 wait syz-executor.0
59431 104741 25077 0 3 0x82 wait syz-fuzzer
59431 127489 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 415367 25077 0 3 0x4000082 wait syz-fuzzer
59431 356509 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 343087 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 364357 25077 0 3 0x4000082 wait syz-fuzzer
59431 496093 25077 0 3 0x4000082 wait syz-fuzzer
59431 140180 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 221774 25077 0 3 0x4000082 kqread syz-fuzzer
59431 72687 25077 0 3 0x4000082 wait syz-fuzzer
59431 10032 25077 0 3 0x4000082 wait syz-fuzzer
59431 289705 25077 0 3 0x4000082 wait syz-fuzzer
59431 430461 25077 0 3 0x4000082 wait syz-fuzzer
59431 206865 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 233024 25077 0 3 0x4000082 thrsleep syz-fuzzer
59431 262581 25077 0 3 0x4000082 thrsleep syz-fuzzer
25077 400560 65633 0 3 0x10008a sigsusp ksh
65633 209502 78096 0 3 0x9a kqread sshd
21416 148043 1 0 3 0x100083 ttyin getty
78096 354304 1 0 3 0x88 kqread sshd
17952 34324 64073 73 3 0x1100090 kqread syslogd
64073 156200 1 0 3 0x100082 netio syslogd
73156 284289 1 0 3 0x100080 kqread resolvd
71167 438811 88782 77 3 0x100092 kqread dhcpleased
46495 428690 88782 77 3 0x100092 kqread dhcpleased
88782 56157 1 0 3 0x80 kqread dhcpleased
76627 16827 0 0 3 0x14200 bored smr
63981 69587 0 0 2 0x14200 zerothread
21266 118865 0 0 3 0x14200 aiodoned aiodoned
36371 443343 0 0 3 0x14200 syncer update
40176 368538 0 0 3 0x14200 cleaner cleaner
1800 501794 0 0 7 0x14200 reaper
44371 82880 0 0 3 0x14200 pgdaemon pagedaemon
53403 224245 0 0 3 0x14200 bored viomb
74893 158192 0 0 3 0x40014200 acpi0 acpi0
85467 91793 0 0 3 0x40014200 idle1
15647 3050 0 0 3 0x14200 bored softnet
70334 94353 0 0 3 0x14200 bored softnet
42407 463923 0 0 3 0x14200 bored softnet
27147 58104 0 0 3 0x14200 bored softnet
69583 381825 0 0 3 0x14200 bored systqmp
67210 518064 0 0 3 0x14200 bored systq
66081 336646 0 0 3 0x40014200 bored softclock
50773 306469 0 0 3 0x40014200 idle0
1 179201 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 1:
exclusive sched_lock &sched_lock r = 0 (0xffffffff82add530)
#0 witness_lock+0x44d
#1 wakeup_n+0x37
#2 uvm_pmr_freepages+0x306 sys/uvm/uvm_pmemrange.c:1304
#3 pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883
#4 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891
#5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
#5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523
#6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#7 reaper+0x19a sys/kern/kern_exit.c:448
#8 proc_trampoline+0x1c
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82add780)
#0 witness_lock+0x44d
#1 mtx_enter_try+0x100
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 uvm_pmr_freepages+0x10c sys/uvm/uvm_pmemrange.c:1289
#4 pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883
#5 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891
#6 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
#6 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523
#7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#8 reaper+0x19a sys/kern/kern_exit.c:448
#9 proc_trampoline+0x1c
Process 64035 (syz-executor.3) thread 0xffff800029a3a2a0 (165655)
exclusive rwlock netlock r = 0 (0xffffffff8291ebe0)
#0 witness_lock+0x44d
#1 sosend+0x500 sys/kern/uipc_socket.c:632
#2 sendit+0x65d sys/kern/uipc_syscalls.c:694
#3 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
#4 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#4 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10200 6410K 6419K 78643K 11297 0
pcb 13 10K 12K 78643K 15 0
rtable 240 6K 7K 78643K 527 0
ifaddr 82 16K 16K 78643K 98 0
sysctl 0 0K 2K 78643K 2 0
counters 56 35K 35K 78643K 60 0
ioctlops 0 0K 2K 78643K 35 0
iov 0 0K 12K 78643K 392 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1271 79K 79K 78643K 2145 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 20 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 14 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 23 85K 125K 78643K 2118 0
sigio 0 0K 0K 78643K 33 0
proc 56 78K 103K 78643K 616 0
subproc 104 6K 6K 78643K 130 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 974 0
in_multi 99 6K 6K 78643K 130 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 181 811K 811K 78643K 181 0
exec 0 0K 2K 78643K 874 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 62K 78643K 8 0
UVM amap 296 91K 100K 78643K 14413 0
UVM aobj 33 6K 6K 78643K 38 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 60 0
NDP 11 0K 2K 78643K 33 0
temp 124 4726K 4790K 78643K 8046 0
kqueue 12 18K 28K 78643K 211 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
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 185 0 182 3 0 3 3 0 8 2
rtentry 112 138 0 25 4 0 4 4 0 8 0
unpcb 144 1640 0 1627 25 23 2 8 0 8 1
syncache 296 24 0 24 6 6 0 1 0 8 0
tcpqe 32 94 0 94 3 3 0 1 0 8 0
tcpcb 768 1261 0 1247 42 33 9 16 0 8 7
arp 120 23 0 4 1 0 1 1 0 8 0
ipq 40 1 0 1 1 1 0 1 0 8 0
ipqe 40 3 0 3 1 1 0 1 0 8 0
inpcb 368 2419 0 2408 45 36 9 13 0 8 7
nd6 48 34 0 8 1 0 1 1 0 8 0
kcovpl 48 10 0 2 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 572 0 110 30 0 30 30 0 8 1
art_table 32 573 0 110 4 0 4 4 0 8 0
art_node 16 137 0 34 1 0 1 1 0 8 0
sysvmsgpl 40 6 0 3 2 1 1 1 0 8 0
semupl 112 2 0 2 2 2 0 1 0 8 0
semapl 112 10 0 0 1 0 1 1 0 8 0
shmpl 112 35 0 5 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 4613 0 3181 90 0 90 90 0 8 0
ffsino 272 4613 0 3181 96 0 96 96 0 8 0
nchpl 144 7470 0 5828 63 0 63 63 0 8 0
uvmvnodes 80 4752 0 0 97 0 97 97 0 8 0
vnodes 216 4752 0 0 264 0 264 264 0 8 0
namei 1024 27897 0 27897 2 1 1 2 0 8 1
percpumem 16 42 0 2 1 0 1 1 0 8 0
kstatmem 264 26 0 4 2 0 2 2 0 8 0
scxspl 216 20151 0 20151 16 13 3 8 0 8 3
plimitpl 152 426 0 404 2 0 2 2 0 8 1
sigapl 424 2392 0 2337 7 0 7 7 0 8 0
futexpl 64 18680 0 18676 1 0 1 1 0 8 0
knotepl 120 202 0 0 5 0 5 5 0 8 0
kqueuepl 216 622 0 614 11 10 1 5 0 8 0
pipepl 320 485 0 457 14 8 6 8 0 8 3
fdescpl 496 2374 0 2340 7 2 5 6 0 8 0
filepl 152 18435 0 18197 41 24 17 18 0 8 7
lockfpl 104 168 0 165 1 0 1 1 0 8 0
lockfspl 48 80 0 77 1 0 1 1 0 8 0
sessionpl 144 25 0 9 1 0 1 1 0 8 0
pgrppl 48 39 0 23 1 0 1 1 0 8 0
ucredpl 104 5530 0 5512 1 0 1 1 0 8 0
zombiepl 144 2340 0 2337 1 0 1 1 0 8 0
processpl 1064 2392 0 2337 5 1 4 5 0 8 0
procpl 672 6508 0 6431 12 4 8 9 0 8 1
sosppl 168 30 0 30 5 5 0 1 0 8 0
sockpl 488 4296 0 4271 102 91 11 28 0 8 7
mcl64k 65536 11 0 0 2 0 2 2 0 8 0
mcl16k 16384 15 0 0 2 0 2 2 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 45 0 0 5 0 5 5 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 253 0 0 31 0 31 31 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 418 0 0 23 0 23 23 0 8 0
bufpl 288 6642 0 312 453 0 453 453 0 8 0
anonpl 24 451063 0 438361 129 46 83 102 0 186 0
amapchunkpl 152 41451 0 40785 65 31 34 41 0 158 6
amappl16 200 6102 0 5741 43 21 22 33 0 8 0
amappl15 192 613 0 601 1 0 1 1 0 8 0
amappl14 184 32 0 28 1 0 1 1 0 8 0
amappl13 176 831 0 824 1 0 1 1 0 8 0
amappl12 168 6 0 3 1 0 1 1 0 8 0
amappl11 160 327 0 308 1 0 1 1 0 8 0
amappl10 152 258 0 252 1 0 1 1 0 8 0
amappl9 144 780 0 774 1 0 1 1 0 8 0
amappl8 136 673 0 588 3 0 3 3 0 8 0
amappl7 128 134 0 115 1 0 1 1 0 8 0
amappl6 120 493 0 479 2 1 1 2 0 8 0
amappl5 112 1855 0 1835 1 0 1 1 0 8 0
amappl4 104 1137 0 1110 2 1 1 2 0 8 0
amappl3 96 7249 0 7182 2 0 2 2 0 8 0
amappl2 88 1254 0 1211 5 4 1 2 0 8 0
amappl1 80 60200 0 59461 19 2 17 19 0 8 0
amappl 88 13853 0 13672 6 1 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 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 72 37 0 5 1 0 1 1 0 8 0
uaddrrnd 24 2375 0 2340 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2375 0 2340 1 0 1 1 0 8 0
vmmpekpl 168 21904 0 21842 4 0 4 4 0 8 0
vmmpepl 168 233719 0 230992 159 30 129 137 0 357 1
vmsppl 368 2374 0 2340 4 0 4 4 0 8 0
rwobjpl 56 63451 0 57265 89 1 88 88 0 8 0
pdppl 4096 4757 0 4680 159 78 81 95 0 8 4
pvpl 32 950750 0 932895 266 109 157 239 0 265 3
pmappl 248 2374 0 2340 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 952 0 117 24 0 24 24 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:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: -9
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: 1
ddb{1}> trace
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -14