panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: filepanic: kernel diagnostic assertion "((flags & PGO_LOCKED) != 0 && rw_lock_held(uobj->vmobjlock)) || (flags & PGO_LOCKED) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 954
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*258468 88841 0 0 0 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29
uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953
uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130
uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236
uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637
upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7daa2a663590, count: 5
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu0: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188
cpu1: kernel diagnostic assertion "((flags & PGO_LOCKED) != 0 && rw_lock_held(uobj->vmobjlock)) || (flags & PGO_LOCKED) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_vnode.c", line 954
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29
uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953
uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130
uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236
uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637
upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7daa2a663590, count: -10
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a1305f0
rbx 0xffff800029b7cdbf
rdx 0
rcx 0xffff80002ef83c10
rax 0xffff800029b7bff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x2753de198c56e9d2
r11 0xe3d8bf72b738d1b
r12 0xffff800029b7cbc0
r13 0
r14 0xffffffff834c2bc0 cpu_info_full_primary+0x2bc0
r15 0x1
rip 0xffffffff82500785 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a1305e0
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=258468 pid=88841 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=86, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002ef82a58,0xffff8000371baa60
process=0xffff8000371e5220 user=0xffff80002a12b000, vmspace=0xfffffd806ce31e18
estcpu=36, cpticks=7, pctcpu=0.0, user=2, sys=5, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
63774 254217 40389 0 2 0 syz-executor
63774 22086 40389 0 3 0x4000080 fsleep syz-executor
72516 114332 13172 0 2 0x10 syz-executor
72516 136061 13172 0 2 0x4000010 syz-executor
*88841 258468 41376 0 7 0 syz-executor
88841 441084 41376 0 3 0x4000080 fsleep syz-executor
56476 522819 98918 0 2 0 syz-executor
56476 510700 98918 0 3 0x4000080 fsleep syz-executor
56476 405666 98918 0 3 0x4000080 fsleep syz-executor
86311 449955 45671 0 2 0 syz-executor
86311 445135 45671 0 3 0x4000080 fsleep syz-executor
86311 38267 45671 0 3 0x4000080 kqread syz-executor
86311 286936 45671 0 3 0x4000080 fsleep syz-executor
53078 331733 72074 0 2 0x2 syz-executor
13172 120237 72074 0 3 0x82 nanoslp syz-executor
44852 63890 72074 0 3 0x82 nanoslp syz-executor
11851 400170 0 0 3 0x14200 acct acct
41376 518350 72074 0 3 0x82 nanoslp syz-executor
98918 127930 72074 0 3 0x82 nanoslp syz-executor
40389 225426 72074 0 3 0x82 nanoslp syz-executor
99536 424876 0 0 3 0x14280 nfsidl nfsio
15339 163105 0 0 3 0x14280 nfsidl nfsio
10771 16990 0 0 3 0x14280 nfsidl nfsio
92087 104714 0 0 3 0x14280 nfsidl nfsio
52088 226522 0 0 3 0x14280 nfsidl nfsio
57764 386351 0 0 3 0x14280 nfsidl nfsio
15254 502922 0 0 3 0x14280 nfsidl nfsio
60421 375767 0 0 3 0x14280 nfsidl nfsio
31104 158288 0 0 3 0x14280 nfsidl nfsio
11701 6740 0 0 3 0x14280 nfsidl nfsio
9783 471908 0 0 3 0x14280 nfsidl nfsio
33223 295836 0 0 3 0x14280 nfsidl nfsio
44496 284890 0 0 3 0x14280 nfsidl nfsio
43576 517144 0 0 3 0x14280 nfsidl nfsio
82861 228571 0 0 3 0x14280 nfsidl nfsio
72499 459536 0 0 3 0x14280 nfsidl nfsio
61973 445627 0 0 3 0x14280 nfsidl nfsio
97847 298588 0 0 3 0x14280 nfsidl nfsio
20573 206453 0 0 3 0x14280 nfsidl nfsio
78984 352037 0 0 3 0x14280 nfsidl nfsio
51810 246856 0 0 3 0x14200 bored sosplice
2896 446922 58989 0 3 0x100082 sbwait ndp
58989 208201 1 0 3 0x10008a sigsusp sh
70981 90061 72074 0 3 0x82 wait syz-executor
45671 18086 72074 0 3 0x82 nanoslp syz-executor
72074 52190 23533 0 3 0x82 kqread syz-executor
23533 504595 12573 0 3 0x10008a sigsusp ksh
12573 492181 49795 0 3 0x98 kqread sshd-session
49795 475942 33493 0 3 0x92 kqread sshd-session
12315 434723 1 0 3 0x100083 ttyin getty
33493 321824 1 0 3 0x88 kqread sshd
63062 165774 69106 74 3 0x1100092 bpf pflogd
69106 221397 1 0 3 0x80 sbwait pflogd
65198 411786 65477 73 3 0x1100090 kqread syslogd
65477 196182 1 0 3 0x100082 sbwait syslogd
29604 370128 1 0 3 0x100080 kqread resolvd
61469 167125 6324 77 3 0x100092 kqread dhcpleased
37245 93228 6324 77 3 0x100092 kqread dhcpleased
6324 279190 1 0 3 0x80 kqread dhcpleased
46004 134105 0 0 3 0x14200 bored smr
70263 362910 0 0 3 0x14200 pgzero zerothread
12966 503977 0 0 3 0x14200 aiodoned aiodoned
84496 112284 0 0 3 0x14200 syncer update
27633 522081 0 0 3 0x14200 cleaner cleaner
11695 90398 0 0 2 0x14200 reaper
71083 486527 0 0 3 0x14200 pgdaemon pagedaemon
47148 296142 0 0 3 0x14200 bored viomb
20747 191853 0 0 3 0x40014200 acpi0 acpi0
59576 357255 0 0 3 0x40014200 idle1
78846 21898 0 0 3 0x14200 bored softnet3
1376 236738 0 0 3 0x14200 bored softnet2
52919 511592 0 0 3 0x14200 bored softnet1
31426 166868 0 0 3 0x14200 bored softnet0
63554 437035 0 0 3 0x14200 bored systqmp
27922 327716 0 0 3 0x14200 bored systq
46349 396441 0 0 3 0x14200 tmoslp softclockmp
52092 75429 0 0 3 0x40014200 tmoslp softclock
62683 13825 0 0 3 0x40014200 idle0
1 135300 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 56476 (syz-executor) thread 0xffff800029fd96d0 (510700)
Process 11695 (reaper) thread 0xffff800029fd8cb0 (90398)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10211 11152K 12714K 166960K 20305 0
pcb 17 20K 25K 166960K 1397 0
rtable 125 5K 8K 166960K 961 0
pf 40 18K 26K 166960K 255 0
ifaddr 34 5K 8K 166960K 182 0
ifgroup 64 2K 2K 166960K 291 0
sysctl 4 1K 1K 166960K 15 0
counters 68 36K 37K 166960K 224 0
ioctlops 0 0K 4K 166960K 2197 0
iov 0 0K 24K 166960K 443 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1682 106K 106K 166960K 5982 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 78 0
VM map 2 1K 1K 166960K 2 0
sem 24 11K 11K 166960K 66 0
dirhash 12 2K 3K 166960K 135 0
ACPI 1690 195K 286K 166960K 12468 0
file desc 18 65K 89K 166960K 5118 0
sigio 0 0K 0K 166960K 358 0
proc 79 127K 128K 166960K 1265 0
subproc 117 7K 7K 166960K 196 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 815 0
in_multi 51 3K 7K 166960K 411 0
ether_multi 1 0K 0K 166960K 50 0
mrt 1 0K 0K 166960K 22 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 79 360K 360K 166960K 79 0
exec 0 0K 1K 166960K 1379 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 8 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 285 74K 91K 166960K 49956 0
UVM aobj 50 4K 6K 166960K 60 0
pinsyscall 45 90K 107K 166960K 6429 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 361 0
NDP 14 0K 2K 166960K 133 0
temp 87 6828K 7084K 166960K 185117 0
kqueue 14 20K 32K 166960K 887 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 612 0 608 9 6 3 4 0 8 2
rtentry 112 295 0 246 4 1 3 4 0 8 0
unpcb 144 4343 0 4324 35 31 4 6 0 8 3
syncache 336 13 0 13 2 2 0 1 0 8 0
tcpqe 32 1 0 1 1 1 0 1 0 8 0
tcpcb 808 1862 0 1854 44 37 7 8 0 8 6
arp 120 56 0 48 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 336 7259 0 7247 93 84 9 21 0 8 7
nd6 136 62 0 52 1 0 1 1 0 8 0
pkpcb 40 92 0 92 16 15 1 1 0 8 1
kcovpl 48 15 0 6 1 0 1 1 0 8 0
ppxss 1168 50 0 50 11 10 1 1 0 8 1
pfstscr 40 2 0 1 1 0 1 1 0 8 0
pffrag 232 30 0 26 1 0 1 1 0 482 0
pffrnode 88 27 0 24 1 0 1 1 0 8 0
pffrent 40 112 0 108 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 435 0 315 2 0 2 2 0 8 0
pfstkey 128 437 0 317 7 0 7 7 0 8 0
pfstate 376 435 0 316 20 0 20 20 0 8 0
pfrule 1344 23 0 18 2 1 1 2 0 8 0
art_heap8 4096 4 0 1 3 0 3 3 0 8 0
art_heap4 256 1349 0 1077 34 16 18 31 0 8 0
art_table 32 1353 0 1078 4 1 3 4 0 8 0
art_node 16 280 0 238 1 0 1 1 0 8 0
sysvmsgpl 40 28 0 24 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 59 0 37 1 0 1 1 0 8 0
shmpl 112 57 0 10 2 0 2 2 0 8 0
dirhash 1024 100 0 83 3 0 3 3 0 8 0
dino2pl 256 10451 0 8926 96 0 96 96 0 8 0
ffsino 272 10451 0 8926 103 0 103 103 0 8 0
nchpl 144 17900 0 16198 64 0 64 64 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 65149 0 65148 7 5 2 2 0 8 1
percpumem 16 126 0 78 1 0 1 1 0 8 0
kstatmem 264 184 0 156 9 6 3 3 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 23 0 23 14 13 1 1 0 8 1
scxspl 216 52783 0 52783 25 24 1 8 1 8 1
plimitpl 152 1225 0 1207 1 0 1 1 0 8 0
sigapl 424 5444 0 5371 10 1 9 9 0 8 0
futexpl 64 79121 0 79114 1 0 1 1 0 8 0
knotepl 120 803 0 0 24 0 24 24 0 8 0
kqueuepl 216 1749 0 1739 18 17 1 5 0 8 0
pipepl 320 749 0 717 14 11 3 8 0 8 0
fdescpl 496 5397 0 5365 5 0 5 5 0 8 0
filepl 152 40021 0 39747 72 54 18 22 0 8 5
lockfpl 104 2392 0 2390 5 4 1 2 0 8 0
lockfspl 48 866 0 864 1 0 1 1 0 8 0
sessionpl 144 39 0 30 1 0 1 1 0 8 0
pgrppl 48 316 0 298 1 0 1 1 0 8 0
ucredpl 104 6974 0 6958 1 0 1 1 0 8 0
zombiepl 144 5766 0 5764 4 3 1 1 0 8 0
processpl 1160 5444 0 5371 6 0 6 6 0 8 0
procpl 648 13748 0 13666 10 2 8 8 0 8 0
srpgc 96 20 0 20 7 7 0 1 0 8 0
sosppl 168 37 0 37 13 13 0 1 0 8 0
sockpl 664 12381 0 12346 116 105 11 23 0 8 7
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 18 0 0 3 0 3 3 0 8 0
mcl12k 12288 9 0 0 1 0 1 1 0 8 0
mcl9k 9216 5 0 0 1 0 1 1 0 8 0
mcl8k 8192 22 0 0 3 0 3 3 0 8 0
mcl4k 4096 156 0 0 19 1 18 19 0 8 0
mcl2k2 2112 4 0 0 1 0 1 1 0 8 0
mcl2k 2048 47 0 0 5 0 5 5 0 8 0
mtagpl 96 102 0 0 3 0 3 3 0 8 0
mbufpl 256 1322 0 0 77 0 77 77 0 8 0
bufpl 280 15056 0 8882 442 0 442 442 0 8 0
anonpl 24 668109 0 662602 170 114 56 73 0 185 8
amapchunkpl 152 163850 0 163139 96 58 38 38 0 158 8
amappl16 200 16155 0 16116 154 142 12 28 0 8 6
amappl15 192 9 0 9 1 1 0 1 0 8 0
amappl14 184 152 0 139 1 0 1 1 0 8 0
amappl13 176 12 0 12 2 2 0 1 0 8 0
amappl12 168 6205 0 6171 3 1 2 2 0 8 0
amappl11 160 89 0 75 1 0 1 1 0 8 0
amappl10 152 15 0 15 2 2 0 1 0 8 0
amappl9 144 132 0 132 1 1 0 1 0 8 0
amappl8 136 47 0 44 1 0 1 1 0 8 0
amappl7 128 126 0 112 1 0 1 1 0 8 0
amappl6 120 246 0 243 1 0 1 1 0 8 0
amappl5 112 173 0 160 1 0 1 1 0 8 0
amappl4 104 385 0 361 1 0 1 1 0 8 0
amappl3 96 30422 0 30304 6 2 4 4 0 8 0
amappl2 88 5807 0 5718 3 0 3 3 0 8 0
amappl1 80 25523 0 24920 15 0 15 15 0 8 0
amappl 88 48964 0 48744 7 1 6 6 0 92 0
dma65536 65536 1 0 1 1 1 0 1 0 8 0
dma32768 32768 2 0 2 2 2 0 1 0 8 0
dma4096 4096 3 0 3 2 2 0 1 0 8 0
dma1024 1024 2 0 1 1 0 1 1 0 8 0
dma512 512 33 0 33 1 1 0 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 258 0 258 5 5 0 1 0 8 0
dma64 64 7 0 7 2 2 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 20 0 19 1 0 1 1 0 8 0
aobjpl 72 59 0 10 1 0 1 1 0 8 0
uaddrrnd 24 5397 0 5364 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 5397 0 5364 1 0 1 1 0 8 0
vmmpekpl 168 40696 0 40635 3 0 3 3 0 8 0
vmmpepl 168 330753 0 328698 171 72 99 110 0 357 4
vmsppl 448 5396 0 5364 6 1 5 5 0 8 0
rwobjpl 56 86701 0 79654 112 9 103 106 0 8 0
pdppl 4096 10801 0 10728 171 96 75 83 0 8 2
pvpl 32 20110 0 0 163 1 162 162 0 265 0
pmappl 248 5396 0 5364 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 692 0 260 13 0 13 13 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff834c1ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff835b1128) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835b1128) at __mp_lock+0x192 sys/kern/kern_lock.c:144
softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
cnputc(65) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff830956bf) at db_printf+0x9b
panic(ffffffff830f6312) at panic+0x103 sys/kern/subr_prf.c:216
__assert(ffffffff830a7cd6,ffffffff8306202e,bc,ffffffff83024a05) at __assert+0x29
unveil_destroy(ffff8000371e68c8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188
exit1(ffff8000367b2f78,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233
end trace frame: 0xffff80002d572b80, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff834c1ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff835b1128) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835b1128) at __mp_lock+0x192 sys/kern/kern_lock.c:144
softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
cnputc(65) at cnputc+0x61 sys/dev/cons.c:218
db_putchar(65) at db_putchar+0x65c sys/ddb/db_output.c:155
kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065
db_printf(ffffffff830956bf) at db_printf+0x9b
panic(ffffffff830f6312) at panic+0x103 sys/kern/subr_prf.c:216
__assert(ffffffff830a7cd6,ffffffff8306202e,bc,ffffffff83024a05) at __assert+0x29
unveil_destroy(ffff8000371e68c8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188
exit1(ffff8000367b2f78,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233
sys_exit(ffff8000367b2f78,ffff80002d572c60,ffff80002d572bb0) at sys_exit+0x1a
syscall(ffff80002d572c60) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80002d572c60) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e08f95b4a30, count: -17
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29
uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953
uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130
uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236
uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637
upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7daa2a663590, count: 5
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff830f6312) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff830a7cd6,ffffffff82febe76,3ba,ffffffff830c95c0) at __assert+0x29
uvn_get(fffffd806d138ac0,47000,ffff80002a130950,ffff80002a1307cc,3,1,2758c642826e4d45,47000) at uvn_get+0x69b sys/uvm/uvm_vnode.c:953
uvm_fault_lower_lookup(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950) at uvm_fault_lower_lookup+0x10e sys/uvm/uvm_fault.c:1130
uvm_fault_lower(ffff80002a1309d8,ffff80002a130a10,ffff80002a130950,ffff80002ef83c10) at uvm_fault_lower+0x6f sys/uvm/uvm_fault.c:1236
uvm_fault(fffffd806ce31e18,110c27a000,0,1) at uvm_fault+0x2f0 sys/uvm/uvm_fault.c:637
upageflttrap(ffff80002a130b60,110c27a477) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a130b60) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7daa2a663590, count: -10