j&n'e5GBG;G䈇X~וcg=u;.lЏji@{\[)& @ \L((hJLC'mCu @z0 2K_Ȍ.'7Cdchى>n_ϷOգ` lN/(̤UlHD o$ֽ܉?.(9\]7 KO(BRm*zէc]Juvm_fault(0xfffffd806bb97020, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff81716e60 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800039009c40
gsbase 0xffff8000299edff0 kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff81716e60
Starting stack trace...
panic(ffffffff8332ccbd) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff800039009b90) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579
dtclose(11e5f,81,2000,ffff80002a290cf0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80002a290cf0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff800039009d40) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8079e06880,81,fffffd807f7d33a8,ffff80002a290cf0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd805e043128,ffff80002a290cf0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd805e043128,ffff80002a290cf0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd805e043128,ffff80002a290cf0) at fdrop+0x126 sys/kern/kern_descrip.c:1265
closef(fffffd805e043128,ffff80002a290cf0) at closef+0x192 sys/kern/kern_descrip.c:1249
fdfree(ffff80002a290cf0) at fdfree+0x116 sys/kern/kern_descrip.c:1181
exit1(ffff80002a290cf0,b,0,1) at exit1+0x58f sys/kern/kern_exit.c:214
sys_exit(ffff80002a290cf0,ffff80003900a0b0,ffff80003900a000) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003900a0b0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003900a0b0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x753fcb0fb4e0, count: 242
End of stack trace.
WARNING: SPL NOT LOWERED ON SYSCALL 74 1569959936 EXIT 0 4
Stopped at savectx+0xae: movl $0,%gs:0x680
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*205678 14415 0 0 0 1 syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x74cc3ee88da0, 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}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd806bb97020, 0x0, 0, 1) -> e
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x74cc3ee88da0, count: -1
ddb{1}> show registers
rdi 0
rsi 0
rbp 0xffff80003441c250
rbx 0
rdx 0
rcx 0xffff8000ffff0548
rax 0x3b
r8 0xffff80003441c180
r9 0x1
r10 0xe66f3a54ffede588
r11 0x1fec3a34d2ec90f2
r12 0
r13 0
r14 0xffff8000ffff0548
r15 0
rip 0xffffffff82c6e3ee savectx+0xae
cs 0x8
rflags 0x46
rsp 0xffff80003441c1d0
ss 0x10
savectx+0xae: movl $0,%gs:0x680
ddb{1}> show proc
PROC (syz-executor) tid=205678 pid=14415 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=86, usrpri=86, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff8000fffe6f90,0xffff8000ffff1228
process=0xffff8000fffee558 user=0xffff800034417000, vmspace=0xfffffd8009ed2d20
estcpu=36, cpticks=4, pctcpu=0.0, user=3, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*14415 205678 12601 0 7 0 syz-executor
14415 95518 12601 0 3 0x4000080 fsleep syz-executor
85480 421834 79077 0 3 0x80 nanoslp syz-executor
85480 149102 79077 0 3 0x4000080 kqsel syz-executor
85480 268245 79077 0 3 0x4000080 fsleep syz-executor
85480 233094 79077 0 3 0x4000080 fsleep syz-executor
92954 7792 60729 0 3 0x80 nanoslp syz-executor
92954 128644 60729 0 3 0x4000080 kqread syz-executor
92954 69285 60729 0 3 0x4000080 fsleep syz-executor
66442 61617 6182 0 3 0x90 nanoslp syz-executor
66442 144442 6182 0 3 0x4000090 msgwait syz-executor
66442 86733 6182 0 3 0x4000090 fsleep syz-executor
36881 182113 10415 0 3 0x2 biowait syz-executor
86859 179219 10415 0 3 0x10000082 nanoslp syz-executor
67185 151654 0 0 3 0x14200 bored sosplice
680 50249 0 0 3 0x14200 acct acct
60729 60673 10415 0 3 0x82 nanoslp syz-executor
17247 415449 10415 0 3 0x82 nanoslp syz-executor
6182 222346 10415 0 3 0x82 nanoslp syz-executor
66633 368638 10415 0 3 0x82 nanoslp syz-executor
79077 70535 10415 0 3 0x82 nanoslp syz-executor
12601 256741 10415 0 3 0x82 nanoslp syz-executor
10415 19163 28742 0 3 0x82 kqread syz-executor
28742 437582 26139 0 3 0x10008a sigsusp ksh
26139 376054 62789 0 3 0x98 kqread sshd-session
62789 441327 71614 0 3 0x92 kqread sshd-session
92636 54498 1 0 3 0x100083 ttyin getty
71614 143061 1 0 3 0x88 kqread sshd
60516 179636 25051 74 3 0x1100092 bpf pflogd
25051 21185 1 0 3 0x80 sbwait pflogd
38170 139558 90837 73 3 0x1100090 kqread syslogd
90837 382694 1 0 3 0x100082 sbwait syslogd
36940 208129 1 0 3 0x100080 kqread resolvd
44930 85041 28619 77 3 0x100092 kqread dhcpleased
20866 493475 28619 77 3 0x100092 kqread dhcpleased
28619 397323 1 0 3 0x80 kqread dhcpleased
69341 427101 0 0 3 0x14200 bored smr
15857 293722 0 0 2 0x14200 zerothread
76351 245790 0 0 3 0x14200 aiodoned aiodoned
84992 135161 0 0 3 0x14200 syncer update
41645 69171 0 0 3 0x14200 cleaner cleaner
77605 260112 0 0 3 0x14200 reaper reaper
36132 230344 0 0 3 0x14200 pgdaemon pagedaemon
83047 520234 0 0 3 0x14200 bored viomb
5555 20939 0 0 3 0x40014200 acpi0 acpi0
22088 516158 0 0 3 0x40014200 idle1
71006 360774 0 0 3 0x14200 bored softnet3
97113 266652 0 0 3 0x14200 bored softnet2
63911 184485 0 0 3 0x14200 bored softnet1
63529 290154 0 0 2 0x14200 softnet0
50221 73750 0 0 2 0x40014200 systqmp
32248 99263 0 0 3 0x14200 bored systq
68338 223040 0 0 3 0x14200 tmoslp softclockmp
90850 374121 0 0 3 0x40014200 tmoslp softclock
37749 305341 0 0 7 0x40014200 idle0
1 327167 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 36881 (syz-executor) thread 0xffff8000ffff1c58 (182113)
exclusive rrwlock inode r = 0 (0xfffffd806e09d1e8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vget+0x2bd sys/kern/vfs_subr.c:694
#6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201
#8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#11 namei+0x7aa sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866
#13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806dd381d8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
#6 namei+0x7aa sys/kern/vfs_lookup.c:250
#7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866
#8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10251 11197K 11432K 166960K 12334 0
pcb 17 13K 14K 166960K 161 0
rtable 254 10K 10K 166960K 505 0
pf 39 18K 20K 166960K 93 0
ifaddr 45 8K 8K 166960K 73 0
ifgroup 60 2K 2K 166960K 106 0
sysctl 4 1K 1K 166960K 6 0
counters 68 36K 37K 166960K 118 0
ioctlops 0 0K 4K 166960K 1649 0
iov 0 0K 12K 166960K 75 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1431 90K 90K 166960K 2256 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 12 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 24 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 16 57K 93K 166960K 826 0
sigio 0 0K 0K 166960K 14 0
proc 72 91K 115K 166960K 667 0
subproc 72 4K 4K 166960K 90 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 86 0
in_multi 99 7K 7K 166960K 134 0
ether_multi 1 0K 0K 166960K 2 0
mrt 0 0K 0K 166960K 2 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 247 1102K 1102K 166960K 247 0
exec 0 0K 1K 166960K 528 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 151K 164K 166960K 9099 0
UVM aobj 18 2K 2K 166960K 21 0
pinsyscall 41 82K 106K 166960K 1996 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 3 0K 0K 166960K 39 0
NDP 13 0K 1K 166960K 47 0
temp 55 8686K 8751K 166960K 28879 0
kqueue 15 24K 28K 166960K 139 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 120 155 0 87 3 0 3 3 0 8 0
rtentry 176 148 0 35 6 0 6 6 0 8 0
unpcb 144 740 0 720 6 5 1 6 0 8 0
syncache 336 5 0 5 2 1 1 1 0 8 1
tcpcb 808 191 0 186 4 3 1 4 0 8 0
arp 128 23 0 6 1 0 1 1 0 8 0
inpcb 384 726 0 647 14 6 8 8 0 8 0
nd6 144 34 0 6 2 0 2 2 0 8 0
pkpcb 40 4 0 4 1 0 1 1 0 8 1
kcovpl 48 10 0 2 1 0 1 1 0 8 0
ppxss 1192 20 0 19 1 0 1 1 0 8 0
pppxif 1504 4 0 3 1 0 1 1 0 8 0
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 2 0 2 1 0 1 1 0 8 1
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 53 0 13 1 0 1 1 0 8 0
pfstkey 128 53 0 13 2 0 2 2 0 8 0
pfstate 384 53 0 13 5 0 5 5 0 8 0
pfrule 1344 27 0 18 2 1 1 2 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 587 0 116 30 0 30 30 0 8 0
art_table 32 590 0 116 4 0 4 4 0 8 0
art_node 16 144 0 43 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 8 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 22 0 12 1 0 1 1 0 8 0
shmpl 112 18 0 3 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 2995 0 1483 95 0 95 95 0 8 0
ffsino 288 2995 0 1483 109 0 109 109 0 8 0
nchpl 144 4088 0 2393 63 0 63 63 0 8 0
rtmask 32 4 0 4 1 1 0 1 0 8 0
uvmvnodes 80 3564 0 0 73 0 73 73 0 8 0
vnodes 216 3564 0 0 198 0 198 198 0 8 0
namei 1024 14311 0 14311 2 1 1 2 0 8 1
percpumem 16 74 0 25 1 0 1 1 0 8 0
kstatmem 264 54 0 28 2 0 2 2 0 8 0
scsiplug 72 4 0 4 2 1 1 1 0 8 1
scxspl 216 14148 0 14147 9 7 2 8 1 8 1
plimitpl 152 118 0 101 1 0 1 1 0 8 0
sigapl 424 1133 0 1082 8 2 6 7 0 8 0
futexpl 64 10211 0 10206 1 0 1 1 0 8 0
knotepl 120 551 0 0 17 0 17 17 0 8 0
kqueuepl 224 458 0 444 5 3 2 5 0 8 1
pipepl 336 189 0 159 5 0 5 5 0 8 2
fdescpl 520 1113 0 1083 3 0 3 3 0 8 0
filepl 160 7281 0 6919 19 3 16 16 0 8 0
lockfpl 104 274 0 272 1 0 1 1 0 8 0
lockfspl 48 118 0 116 1 0 1 1 0 8 0
sessionpl 144 26 0 17 1 0 1 1 0 8 0
pgrppl 48 48 0 31 1 0 1 1 0 8 0
ucredpl 104 1641 0 1625 1 0 1 1 0 8 0
zombiepl 144 1085 0 1082 1 0 1 1 0 8 0
processpl 1192 1133 0 1082 5 0 5 5 0 8 0
procpl 656 2253 0 2194 7 1 6 6 0 8 0
srpgc 96 4 0 4 1 0 1 1 0 8 1
sosppl 168 1 0 1 1 0 1 1 0 8 1
sockpl 728 1637 0 1470 27 11 16 16 0 8 0
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 131 0 0 17 0 17 17 0 8 0
mcl2k 2048 18 0 0 3 0 3 3 0 8 0
mtagpl 96 41 0 0 1 0 1 1 0 8 0
mbufpl 256 573 0 0 36 0 36 36 0 8 0
bufpl 280 4663 0 126 325 0 325 325 0 8 0
anonpl 32 11205 0 0 91 0 91 91 0 246 0
amapchunkpl 152 29099 0 28599 28 0 28 28 0 158 7
amappl16 200 3414 0 3382 33 18 15 27 0 8 11
amappl15 192 6 0 6 1 1 0 1 0 8 0
amappl14 184 130 0 118 1 0 1 1 0 8 0
amappl13 176 9 0 9 2 2 0 1 0 8 0
amappl12 168 1800 0 1770 4 1 3 3 0 8 0
amappl11 160 80 0 66 1 0 1 1 0 8 0
amappl10 152 9 0 9 1 1 0 1 0 8 0
amappl9 144 247 0 247 1 1 0 1 0 8 0
amappl8 136 28 0 26 1 0 1 1 0 8 0
amappl7 128 115 0 103 1 0 1 1 0 8 0
amappl6 120 200 0 197 1 0 1 1 0 8 0
amappl5 112 145 0 136 1 0 1 1 0 8 0
amappl4 104 331 0 311 1 0 1 1 0 8 0
amappl3 96 5814 0 5700 4 0 4 4 0 8 0
amappl2 88 687 0 622 2 0 2 2 0 8 0
amappl1 80 11708 0 11102 15 0 15 15 0 8 0
amappl 88 8209 0 8041 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma2048 2048 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 128 255 0 255 3 3 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 20 0 3 1 0 1 1 0 8 0
uaddrrnd 24 1113 0 1083 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1113 0 1083 1 0 1 1 0 8 0
vmmpekpl 168 10450 0 10399 3 0 3 3 0 8 0
vmmpepl 168 75226 0 73256 112 2 110 110 0 357 10
vmsppl 480 1112 0 1083 5 0 5 5 0 8 0
rwobjpl 72 25139 0 20609 86 0 86 86 0 8 1
pdppl 4096 2233 0 2166 109 38 71 85 0 8 4
pvpl 32 19369 0 0 158 1 157 157 0 265 0
pmappl 256 1112 0 1083 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 428 0 46 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83806ff0) 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
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 sys/kern/kern_lock.c:144
softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsofttty() at Xsofttty+0x27
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 sys/kern/kern_lock.c:144
intr_handler(ffff80002a202d00,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218
sched_idle(ffffffff83806ff0) at sched_idle+0x558 sys/kern/kern_sched.c:182
end trace frame: 0x0, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff83806ff0) 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
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 sys/kern/kern_lock.c:144
softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsofttty() at Xsofttty+0x27
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839922b0) at __mp_lock+0x192 sys/kern/kern_lock.c:144
intr_handler(ffff80002a202d00,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218
sched_idle(ffffffff83806ff0) at sched_idle+0x558 sys/kern/kern_sched.c:182
end trace frame: 0x0, count: -11
ddb{0}> machine ddbcpu 1
Stopped at savectx+0xae: movl $0,%gs:0x680
savectx() at savectx+0xae
end of kernel
end trace frame: 0x74cc3ee88da0, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x74cc3ee88da0, count: -1