panic: kerWnAeRlN ING:d iSaPgL nNOoTstic LaOsserWtEiRED ON TRAP EXIT a 0
Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*113674 27242 0 0 0 1 syz-executor
224422 9612 0 0 0x4000000 0 syz-executor
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x77b188554a80, count: 14
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 "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1309
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x77b188554a80, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff800037fe1240
rbx 0
rdx 0
rcx 0xffff80003c40afc0
rax 0x2a
r8 0xffff800037fe1170
r9 0x1
r10 0x7957a3701c0ee6e4
r11 0x181106c2d0dbcbd7
r12 0
r13 0xffffffff82e7bf98 Xdoreti+0x18
r14 0
r15 0
rip 0xffffffff831f04c7 proc_trampoline+0xc7
cs 0x8
rflags 0x246
rsp 0xffff800037fe11c0
ss 0
proc_trampoline+0xc7: movl $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=113674 pid=27242 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=50, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003bbfda10,0xffff80003c40a040
process=0xffff80003c4c0028 user=0xffff800037fdc000, vmspace=0xfffffd806c817b90
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
4441 192652 60508 0 2 0 syz-executor
*27242 113674 19359 0 7 0 syz-executor
27242 208666 19359 0 3 0x4000080 fsleep syz-executor
9612 97405 95573 0 2 0 syz-executor
9612 224422 95573 0 7 0x4000000 syz-executor
99211 438969 0 0 3 0x14280 nfsidl nfsio
75528 367747 0 0 3 0x14280 nfsidl nfsio
92359 388652 0 0 3 0x14280 nfsidl nfsio
6356 274956 0 0 3 0x14280 nfsidl nfsio
10212 48905 0 0 3 0x14280 nfsidl nfsio
10205 187390 0 0 3 0x14280 nfsidl nfsio
49521 73667 0 0 3 0x14280 nfsidl nfsio
79138 305057 0 0 3 0x14280 nfsidl nfsio
7803 147332 0 0 3 0x14280 nfsidl nfsio
64496 320127 0 0 3 0x14280 nfsidl nfsio
89305 176849 0 0 3 0x14280 nfsidl nfsio
97085 26841 0 0 3 0x14280 nfsidl nfsio
52941 523865 0 0 3 0x14280 nfsidl nfsio
43323 72457 0 0 3 0x14280 nfsidl nfsio
98667 97353 0 0 3 0x14280 nfsidl nfsio
59664 261480 0 0 3 0x14280 nfsidl nfsio
35836 439433 0 0 3 0x14280 nfsidl nfsio
28151 837 0 0 3 0x14280 nfsidl nfsio
83332 333653 0 0 3 0x14280 nfsidl nfsio
31654 176935 0 0 3 0x14280 nfsidl nfsio
66300 420461 63111 0 3 0x80 nanoslp syz-executor
66300 85051 63111 0 3 0x4000080 ttyin syz-executor
66300 307094 63111 0 3 0x4000080 fsleep syz-executor
39158 203223 40650 0 3 0x80 nanoslp syz-executor
39158 107417 40650 0 3 0x4000080 kqsel syz-executor
39158 414 40650 0 3 0x4000080 fsleep syz-executor
80817 228253 731 0 3 0x80 nanoslp syz-executor
80817 286368 731 0 3 0x4000080 kqread syz-executor
80817 266032 731 0 3 0x4000080 ttyin syz-executor
80817 403182 731 0 3 0x4000080 fsleep syz-executor
40650 28608 68004 0 3 0x82 nanoslp syz-executor
19359 520446 68004 0 3 0x82 nanoslp syz-executor
731 29583 68004 0 3 0x82 nanoslp syz-executor
95573 51281 68004 0 3 0x82 nanoslp syz-executor
37968 405334 68004 0 3 0x82 nanoslp syz-executor
63111 403873 68004 0 3 0x82 nanoslp syz-executor
81911 85909 68004 0 3 0x82 nanoslp syz-executor
60508 446049 68004 0 3 0x82 nanoslp syz-executor
68004 237026 10798 0 3 0x82 kqread syz-executor
10798 105117 42288 0 3 0x10008a sigsusp ksh
42288 236646 94086 0 3 0x98 kqread sshd-session
94086 151913 14155 0 3 0x92 kqread sshd-session
81798 285593 1 0 3 0x100083 ttyin getty
14155 467362 1 0 3 0x88 kqread sshd
56959 356058 63764 74 3 0x1100092 bpf pflogd
63764 7358 1 0 3 0x80 sbwait pflogd
4839 300259 26151 73 3 0x1100090 kqread syslogd
26151 398273 1 0 3 0x100082 sbwait syslogd
46949 358657 1 0 3 0x100080 kqread resolvd
93889 106312 91702 77 3 0x100092 kqread dhcpleased
21031 399213 91702 77 3 0x100092 kqread dhcpleased
91702 505857 1 0 3 0x80 kqread dhcpleased
77886 432449 0 0 3 0x14200 bored smr
21289 188919 0 0 3 0x14200 pgzero zerothread
41761 336655 0 0 3 0x14200 aiodoned aiodoned
36802 320190 0 0 3 0x14200 syncer update
84083 389302 0 0 3 0x14200 cleaner cleaner
60825 39539 0 0 2 0x14200 reaper
92680 274308 0 0 3 0x14200 pgdaemon pagedaemon
61553 213249 0 0 3 0x14200 bored viomb
77138 387437 0 0 3 0x40014200 acpi0 acpi0
48634 378682 0 0 3 0x40014200 idle1
96116 234310 0 0 3 0x14200 bored softnet1
65131 412183 0 0 3 0x14200 bored softnet0
92118 295596 0 0 3 0x14200 bored systqmp
50732 96263 0 0 3 0x14200 bored systq
20981 497251 0 0 3 0x14200 tmoslp softclockmp
77427 117050 0 0 3 0x40014200 tmoslp softclock
747 188936 0 0 3 0x40014200 idle0
1 299960 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c816810)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824
#3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863
#4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
#4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486
#5 exit1+0x6fc sys/kern/kern_exit.c:260
#6 sys_exit+0x1a sys/kern/kern_exit.c:-1
#7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
#8 Xsyscall+0x128
Process 9612 (syz-executor) thread 0xffff80003bbfda10 (224422)
shared rwlock uobjlk r = 0 (0xfffffd806f5f06d8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204
#3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
#4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
#5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
#7 alltraps_kern_meltdown+0x7b
#8 _copyin+0x5b
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#10 Xsyscall+0x128
shared rwlock amaplk r = 0 (0xfffffd805f08cce8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#5 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
#6 alltraps_kern_meltdown+0x7b
#7 _copyin+0x5b
#8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#9 Xsyscall+0x128
shared rwlock vmmaplk r = 0 (0xfffffd806c817308)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
#7 alltraps_kern_meltdown+0x7b
#8 _copyin+0x5b
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#10 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10214 11165K 11411K 166960K 11581 0
pcb 17 12K 12K 166960K 76 0
rtable 253 9K 9K 166960K 392 0
pf 36 17K 18K 166960K 63 0
ifaddr 44 7K 8K 166960K 56 0
ifgroup 57 2K 2K 166960K 82 0
sysctl 2 1K 9K 166960K 7 0
counters 76 37K 37K 166960K 100 0
ioctlops 0 0K 4K 166960K 1507 0
iov 0 0K 16K 166960K 9 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1372 86K 86K 166960K 1508 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 2K 3K 166960K 4 0
VM map 2 1K 1K 166960K 2 0
sem 4 0K 0K 166960K 4 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 97K 166960K 277 0
sigio 0 0K 0K 166960K 1 0
proc 72 115K 180K 166960K 540 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 16 0
in_multi 99 7K 7K 166960K 117 0
ether_multi 1 0K 0K 166960K 6 0
mrt 0 0K 0K 166960K 3 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 399 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 239 161K 178K 166960K 4626 0
UVM aobj 7 8K 8K 166960K 8 0
pinsyscall 42 84K 108K 166960K 1446 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 13 0
NDP 13 0K 2K 166960K 34 0
temp 45 8668K 8739K 166960K 14296 0
kqueue 14 22K 26K 166960K 47 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 41 0 38 1 0 1 1 0 8 0
rtentry 176 116 0 4 6 0 6 6 0 8 0
unpcb 144 160 0 142 4 0 4 4 0 8 3
syncache 336 4 0 4 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 82 0 77 4 0 4 4 0 8 3
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 317 0 307 7 0 7 7 0 8 6
nd6 152 25 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 11 0 8 1 0 1 1 0 8 0
pppxif 1504 3 0 3 1 0 1 1 0 8 1
pffrag 232 2 0 0 1 0 1 1 0 482 0
pffrnode 88 2 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 1 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 25 0 0 1 0 1 1 0 8 0
pfstkey 128 25 0 0 1 0 1 1 0 8 0
pfstate 448 25 0 0 3 0 3 3 0 8 0
pfrule 1344 21 0 15 2 0 2 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 481 0 18 30 0 30 30 0 8 1
art_table 40 483 0 18 5 0 5 5 0 8 0
art_node 32 116 0 14 1 0 1 1 0 8 0
semapl 112 2 0 0 1 0 1 1 0 8 0
shmpl 112 2 0 1 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1824 0 310 96 0 96 96 0 8 0
ffsino 296 1824 0 310 118 0 118 118 0 8 0
nchpl 144 2229 0 521 64 0 64 64 0 8 0
rtmask 32 3 0 2 1 0 1 1 0 8 0
vnodes 216 2009 0 0 112 0 112 112 0 8 0
namei 1024 6757 0 6757 2 0 2 2 0 8 2
percpumem 16 65 0 12 1 0 1 1 0 8 0
vcpupl 3968 3 0 0 1 0 1 1 0 8 0
vmpool 848 3 0 0 1 0 1 1 0 8 0
kstatmem 264 38 0 10 3 0 3 3 0 8 0
scxspl 216 9862 0 9862 9 1 8 8 1 8 8
plimitpl 152 51 0 31 1 0 1 1 0 8 0
sigapl 424 618 0 550 8 0 8 8 0 8 0
knotepl 120 313 0 0 10 0 10 10 0 8 0
kqueuepl 224 71 0 60 2 0 2 2 0 8 1
pipepl 344 132 0 103 3 0 3 3 0 8 0
fdescpl 528 582 0 551 3 0 3 3 0 8 0
filepl 160 2467 0 2222 13 0 13 13 0 8 2
lockfpl 104 64 0 59 1 0 1 1 0 8 0
lockfspl 48 32 0 27 1 0 1 1 0 8 0
sessionpl 144 23 0 14 1 0 1 1 0 8 0
pgrppl 48 31 0 14 1 0 1 1 0 8 0
ucredpl 104 213 0 200 1 0 1 1 0 8 0
zombiepl 144 552 0 550 1 0 1 1 0 8 0
processpl 1232 618 0 550 6 0 6 6 0 8 0
procpl 664 863 0 786 7 0 7 7 0 8 0
sockpl 752 522 0 491 10 0 10 10 0 8 6
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k 2048 22 0 0 3 0 3 3 0 8 0
mtagpl 96 8 0 0 1 0 1 1 0 8 0
mbufpl 256 160 0 0 10 0 10 10 0 8 0
bufpl 280 3618 0 124 250 0 250 250 0 8 0
anonpl 32 10811 0 0 89 1 88 88 0 246 0
amapchunkpl 152 13213 0 12549 32 0 32 32 0 158 3
amappl16 200 1419 0 1396 26 2 24 24 0 8 19
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 6 0 6 1 1 0 1 0 8 0
amappl13 176 437 0 436 1 0 1 1 0 8 0
amappl12 168 953 0 912 3 0 3 3 0 8 0
amappl11 160 51 0 51 1 1 0 1 0 8 0
amappl10 152 50 0 35 1 0 1 1 0 8 0
amappl9 144 258 0 258 1 1 0 1 0 8 0
amappl8 136 22 0 20 1 0 1 1 0 8 0
amappl7 128 84 0 83 1 0 1 1 0 8 0
amappl6 120 290 0 277 1 0 1 1 0 8 0
amappl5 112 74 0 64 1 0 1 1 0 8 0
amappl4 104 433 0 401 1 0 1 1 0 8 0
amappl3 96 2305 0 2203 5 1 4 4 0 8 1
amappl2 88 545 0 485 2 0 2 2 0 8 0
amappl1 80 9940 0 9356 15 0 15 15 0 8 2
amappl 88 3832 0 3671 5 0 5 5 0 92 0
uvmvnodes 80 101 0 0 3 0 3 3 0 8 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 7 0 7 2 1 1 1 0 8 1
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 7 0 1 1 0 1 1 0 8 0
uaddrrnd 24 582 0 551 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 582 0 551 1 0 1 1 0 8 0
vmmpekpl 168 6620 0 6578 3 0 3 3 0 8 0
vmmpepl 168 44231 0 42345 105 0 105 105 0 357 5
vmsppl 488 581 0 550 5 0 5 5 0 8 1
rwobjpl 80 14771 0 13758 31 0 31 31 0 8 5
pdppl 4096 1177 0 1103 109 34 75 87 0 8 1
pvpl 32 16868 0 0 137 0 137 137 0 265 0
pmappl 256 584 0 550 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 288 0 36 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8389eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(69) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(69) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff8338c269) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff833b4474) at panic+0x103 sys/kern/subr_prf.c:217
__assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1
end trace frame: 0xffff80003c4e76b0, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff8389eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
cnputc(69) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(69) at db_putchar+0x36d sys/ddb/db_output.c:155
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
db_printf(ffffffff8338c269) at db_printf+0x9b sys/kern/subr_prf.c:-1
panic(ffffffff833b4474) at panic+0x103 sys/kern/subr_prf.c:217
__assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageactivate(fffffd800851eba0) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306
uvm_fault_lower_lookup(ffff80003c4e7900,ffff80003c4e7938,ffff80003c4e7880) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1248
uvm_fault_lower(ffff80003c4e7900,ffff80003c4e7938,ffff80003c4e7880) at uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334
uvm_fault(fffffd806c817208,200000000000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
kpageflttrap(ffff80003c4e7ab0,200000000080) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80003c4e7ab0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
_copyin() at _copyin+0x5b
syscall(ffff80003c4e7dd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e7dd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc87998f6300, count: -24
ddb{0}> machine ddbcpu 1
Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x77b188554a80, count: 14
ddb{1}> trace
proc_trampoline() at proc_trampoline+0xc7
end of kernel
end trace frame: 0x77b188554a80, count: -1