panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 140
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*309332 43129 0 0 0x4000000 0K syz-executor.1
112199 43129 0 0 0x4000000 1 syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240ad4a) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff824744f5,ffffffff823f9a79,8c,ffffffff823e5235) at __assert+0x2b sys/kern/subr_prf.c:154
uvm_pagealloc(fffffd807effd958,0,0,3) at uvm_pagealloc+0x476 sys/uvm/uvm_page.c:140
pmap_get_ptp(fffffd807effd910,20000000) at pmap_get_ptp+0xe8 sys/arch/amd64/amd64/pmap.c:1175
pmap_enter(fffffd807effd910,20000000,64aa0000,5,21) at pmap_enter+0x2a8
uvm_fault(fffffd806e8f8458,20000000,0,1) at uvm_fault+0x1373 sys/uvm/uvm_fault.c:939
pageflttrap(ffff800020ed4570,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020ed4570) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x4b
sys_bind(ffff800020e0a128,ffff800020ed4718,ffff800020ed4760) at sys_bind+0xfe sys/kern/uipc_syscalls.c:171
syscall(ffff800020ed47e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed47e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x91d52d440f0, count: 1
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
kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 140
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff8240ad4a) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff824744f5,ffffffff823f9a79,8c,ffffffff823e5235) at __assert+0x2b sys/kern/subr_prf.c:154
uvm_pagealloc(fffffd807effd958,0,0,3) at uvm_pagealloc+0x476 sys/uvm/uvm_page.c:140
pmap_get_ptp(fffffd807effd910,20000000) at pmap_get_ptp+0xe8 sys/arch/amd64/amd64/pmap.c:1175
pmap_enter(fffffd807effd910,20000000,64aa0000,5,21) at pmap_enter+0x2a8
uvm_fault(fffffd806e8f8458,20000000,0,1) at uvm_fault+0x1373 sys/uvm/uvm_fault.c:939
pageflttrap(ffff800020ed4570,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020ed4570) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x4b
sys_bind(ffff800020e0a128,ffff800020ed4718,ffff800020ed4760) at sys_bind+0xfe sys/kern/uipc_syscalls.c:171
syscall(ffff800020ed47e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed47e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x91d52d440f0, count: -14
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020ed3f60
rbx 0xffff800020ed4010
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff8202f34f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x78dd93e6aba801cb
r12 0x3000000008
r13 0xffff800020ed3f70
r14 0x100
r15 0x1
rip 0xffffffff81106bf8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020ed3f50
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.1) pid=309332 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=72, nice=20
forw=0xffffffffffffffff, list=0xffff800020e0a878,0xffff800020e09298
process=0xffff8000230f7390 user=0xffff800020ecf000, vmspace=0xfffffd806e8f8458
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
80513 183098 35646 0 3 0x80 nanosleep syz-executor.0
80513 225889 35646 0 3 0x4000080 msgwait syz-executor.0
80513 448949 35646 0 3 0x4000080 fsleep syz-executor.0
43129 127025 39132 0 2 0 syz-executor.1
*43129 309332 39132 0 7 0x4000000 syz-executor.1
43129 112199 39132 0 7 0x4000000 syz-executor.1
43129 505790 39132 0 3 0x4000080 fsleep syz-executor.1
81184 448939 0 0 3 0x14200 bored sosplice
39132 363958 12069 0 3 0x82 nanosleep syz-executor.1
35646 253165 12069 0 3 0x82 nanosleep syz-executor.0
12069 398811 55153 0 3 0x82 thrsleep syz-fuzzer
12069 340854 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 463174 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 38836 55153 0 3 0x4000082 kqread syz-fuzzer
12069 395486 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 79817 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 376799 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 437170 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 57859 55153 0 3 0x4000082 thrsleep syz-fuzzer
12069 281310 55153 0 3 0x4000082 thrsleep syz-fuzzer
55153 496471 40799 0 3 0x10008a pause ksh
40799 393104 74180 0 3 0x92 select sshd
14435 150962 1 0 3 0x100083 ttyin getty
74180 247230 1 0 3 0x80 select sshd
94134 194518 60315 74 3 0x100092 bpf pflogd
60315 325102 1 0 3 0x80 netio pflogd
41289 65523 34550 73 3 0x100090 kqread syslogd
34550 290671 1 0 3 0x100082 netio syslogd
3780 388291 1 77 3 0x100090 poll dhclient
57818 331690 1 0 3 0x80 poll dhclient
72130 344885 0 0 3 0x14200 bored smr
59629 41945 0 0 3 0x14200 pgzero zerothread
24319 297819 0 0 3 0x14200 aiodoned aiodoned
85090 450268 0 0 3 0x14200 syncer update
68831 277877 0 0 3 0x14200 cleaner cleaner
36454 166967 0 0 3 0x14200 reaper reaper
31067 357695 0 0 3 0x14200 pgdaemon pagedaemon
65729 308437 0 0 3 0x14200 bored crynlk
56084 190994 0 0 3 0x14200 bored crypto
12237 495095 0 0 3 0x40014200 acpi0 acpi0
51097 46154 0 0 3 0x40014200 idle1
73946 319188 0 0 3 0x14200 bored softnet
49512 495105 0 0 3 0x14200 bored systqmp
49291 111643 0 0 3 0x14200 bored systq
15922 107117 0 0 3 0x40014200 bored softclock
39933 406351 0 0 3 0x40014200 idle0
1 492191 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807effd920)
#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 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 pmap_enter+0x1bc rcr3 machine/cpufunc.h:141 [inline]
#3 pmap_enter+0x1bc pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline]
#3 pmap_enter+0x1bc sys/arch/amd64/amd64/pmap.c:2678
#4 uvm_fault+0x1373 sys/uvm/uvm_fault.c:939
#5 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
#6 kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
#7 alltraps_kern_meltdown+0x7b
#8 copyin+0x4b
#9 sys_bind+0xfe sys/kern/uipc_syscalls.c:171
#10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#11 Xsyscall+0x128
Process 43129 (syz-executor.1) thread 0xffff800020e0a128 (309332)
shared rwlock vmmaplk r = 0 (0xfffffd806e8f8470)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
#4 kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
#5 alltraps_kern_meltdown+0x7b
#6 copyin+0x4b
#7 sys_bind+0xfe sys/kern/uipc_syscalls.c:171
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828dfa20)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570
#2 Xsyscall+0x128
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807effd920)
#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 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 pmap_enter+0x1bc rcr3 machine/cpufunc.h:141 [inline]
#3 pmap_enter+0x1bc pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline]
#3 pmap_enter+0x1bc sys/arch/amd64/amd64/pmap.c:2678
#4 uvm_fault+0x1373 sys/uvm/uvm_fault.c:939
#5 pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
#6 kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
#7 alltraps_kern_meltdown+0x7b
#8 copyin+0x4b
#9 sys_bind+0xfe sys/kern/uipc_syscalls.c:171
#10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#11 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9505 6481K 7307K 78643K 11429 0
pcb 13 8K 8K 78643K 55 0
rtable 118 6K 7K 78643K 319 0
ifaddr 66 14K 14K 78643K 112 0
counters 43 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1502 0
iov 0 0K 16K 78643K 127 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1426 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 29 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 235 0
sigio 0 0K 0K 78643K 2 0
proc 61 63K 83K 78643K 456 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 26 0
in_multi 39 2K 2K 78643K 86 0
ether_multi 1 0K 0K 78643K 7 0
mrt 0 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 221 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 132 39K 43K 78643K 1721 0
UVM aobj 13 2K 2K 78643K 13 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 48 0
NDP 10 0K 0K 78643K 24 0
temp 94 3856K 3920K 78643K 3326 0
kqueue 3 4K 8K 78643K 6 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 9 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 28 0 25 1 0 1 1 0 8 0
rtentry 112 63 0 19 2 0 2 2 0 8 0
unpcb 120 241 0 231 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 344 0 344 1 1 0 1 0 8 0
tcpcb 544 93 0 86 1 0 1 1 0 8 0
inpcb 296 292 0 280 2 0 2 2 0 8 1
nd6 48 12 0 8 1 0 1 1 0 8 0
ppxss 1136 1 0 1 1 0 1 1 0 8 1
pffrag 232 1 0 1 1 1 0 1 0 482 0
pffrnode 88 1 0 1 1 1 0 1 0 8 0
pffrent 40 2 0 2 1 1 0 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
pfrktable 1344 13 0 8 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 23 0 3 1 0 1 1 0 8 0
pfstkey 112 23 0 3 1 0 1 1 0 8 0
pfstate 328 22 0 3 2 0 2 2 0 8 0
pfrule 1360 27 0 22 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 243 0 58 13 0 13 13 0 8 0
art_table 32 245 0 58 2 0 2 2 0 8 0
art_node 16 62 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 12 1 0 1 1 0 8 1
semupl 112 8 0 8 1 1 0 1 0 8 0
semapl 112 14 0 4 1 0 1 1 0 8 0
shmpl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1700 0 294 89 0 89 89 0 8 0
ffsino 272 1700 0 294 95 1 94 94 0 8 0
nchpl 144 2299 0 685 61 0 61 61 0 8 0
uvmvnodes 72 1926 0 0 36 0 36 36 0 8 0
vnodes 208 1926 0 0 102 0 102 102 0 8 0
namei 1024 6278 0 6278 2 1 1 1 0 8 1
percpumem 16 38 0 6 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 6 0 2 1 0 1 1 0 8 0
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 6447 0 6447 6 5 1 5 0 8 1
plimitpl 152 25 0 17 1 0 1 1 0 8 0
sigapl 424 451 0 418 4 0 4 4 0 8 0
futexpl 56 3806 0 3804 1 0 1 1 0 8 0
knotepl 112 65 0 46 1 0 1 1 0 8 0
kqueuepl 144 23 0 20 1 0 1 1 0 8 0
pipepl 304 99 0 89 3 1 2 2 0 8 1
fdescpl 496 435 0 418 3 0 3 3 0 8 0
filepl 152 2669 0 2563 7 2 5 5 0 8 0
lockfpl 104 44 0 43 1 0 1 1 0 8 0
lockfspl 48 17 0 16 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 96 250 0 240 1 0 1 1 0 8 0
zombiepl 144 418 0 418 2 1 1 1 0 8 1
processpl 992 451 0 418 7 2 5 5 0 8 0
procpl 624 937 0 890 4 0 4 4 0 8 0
sosppl 128 3 0 3 1 0 1 1 0 8 1
sockpl 400 561 0 538 6 2 4 4 0 8 1
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 199 0 0 24 0 24 24 0 8 0
mtagpl 96 116 0 0 3 0 3 3 0 8 0
mbufpl 256 404 0 0 25 0 25 25 0 8 0
bufpl 280 3610 0 133 249 0 249 249 0 8 0
anonpl 16 57453 0 40302 78 1 77 77 0 124 8
amapchunkpl 152 2382 0 2217 13 1 12 12 0 158 3
amappl16 192 1672 0 764 46 0 46 46 0 8 0
amappl15 184 98 0 95 1 0 1 1 0 8 0
amappl14 176 130 0 122 1 0 1 1 0 8 0
amappl13 168 29 0 26 1 0 1 1 0 8 0
amappl12 160 3 0 2 2 1 1 1 0 8 0
amappl11 152 169 0 151 1 0 1 1 0 8 0
amappl10 144 119 0 111 1 0 1 1 0 8 0
amappl9 136 347 0 346 1 0 1 1 0 8 0
amappl8 128 360 0 322 2 0 2 2 0 8 0
amappl7 120 121 0 108 1 0 1 1 0 8 0
amappl6 112 28 0 23 1 0 1 1 0 8 0
amappl5 104 315 0 298 1 0 1 1 0 8 0
amappl4 96 597 0 563 1 0 1 1 0 8 0
amappl3 88 225 0 215 1 0 1 1 0 8 0
amappl2 80 2627 0 2545 2 0 2 2 0 8 0
amappl1 72 21663 0 21176 22 11 11 18 0 8 0
amappl 80 1196 0 1145 2 0 2 2 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 12 0 0 1 0 1 1 0 8 0
uaddrrnd 24 437 0 418 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 437 0 418 1 0 1 1 0 8 0
vmmpekpl 168 7492 0 7456 2 0 2 2 0 8 0
vmmpepl 168 62194 0 59958 125 17 108 120 0 357 10
vmsppl 368 436 0 418 2 0 2 2 0 8 0
pdppl 4096 881 0 838 6 0 6 6 0 8 0
pvpl 32 192122 0 171610 185 0 185 185 0 265 19
pmappl 232 436 0 418 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 280 0 7 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(ffffffff8240ad4a) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff824744f5,ffffffff823f9a79,8c,ffffffff823e5235) at __assert+0x2b sys/kern/subr_prf.c:154
uvm_pagealloc(fffffd807effd958,0,0,3) at uvm_pagealloc+0x476 sys/uvm/uvm_page.c:140
pmap_get_ptp(fffffd807effd910,20000000) at pmap_get_ptp+0xe8 sys/arch/amd64/amd64/pmap.c:1175
pmap_enter(fffffd807effd910,20000000,64aa0000,5,21) at pmap_enter+0x2a8
uvm_fault(fffffd806e8f8458,20000000,0,1) at uvm_fault+0x1373 sys/uvm/uvm_fault.c:939
pageflttrap(ffff800020ed4570,0) at pageflttrap+0x1b8 sys/arch/amd64/amd64/trap.c:221
kerntrap(ffff800020ed4570) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyin() at copyin+0x4b
sys_bind(ffff800020e0a128,ffff800020ed4718,ffff800020ed4760) at sys_bind+0xfe sys/kern/uipc_syscalls.c:171
syscall(ffff800020ed47e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed47e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x91d52d440f0, count: -14
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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
__mp_lock(ffffffff828df818) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828df818) at __mp_lock+0x127 sys/kern/kern_lock.c:147
sys_futex(ffff800020e09eb8,ffff800023f3b2b0,ffff800023f3b300) at sys_futex+0xf6 sys/kern/sys_futex.c:109
syscall(ffff800023f3b380) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3b380) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x91ded5462f0, count: 8
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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
__mp_lock(ffffffff828df818) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828df818) at __mp_lock+0x127 sys/kern/kern_lock.c:147
sys_futex(ffff800020e09eb8,ffff800023f3b2b0,ffff800023f3b300) at sys_futex+0xf6 sys/kern/sys_futex.c:109
syscall(ffff800023f3b380) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023f3b380) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x91ded5462f0, count: -7