uvm_fault(0xffffffff8353a8b0, 0xffff80002643276f, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND * 81169 41960 73 0x19100010 0 0K syslogd memset() at memset+0x49 ffs_write(ffff80002a069fe0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e2587e8,ffff80002a06a200,3,fffffd807f7d3820) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f893130,ffff80002a06a200,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a06a200,0,ffff80002a06a2c0) at dofilewritev+0x23c sys/kern/sys_generic.c:375 sys_writev(ffff8000ffffdbe8,ffff80002a06a370,ffff80002a06a2c0) at sys_writev+0xd8 sys/kern/sys_generic.c:322 syscall(ffff80002a06a370) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a370) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734753991e00, count: 7 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: uvm_fault(0xffffffff8353a8b0, 0xffff80002643276f, 0, 2) -> d ddb{0}> trace memset() at memset+0x49 ffs_write(ffff80002a069fe0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e2587e8,ffff80002a06a200,3,fffffd807f7d3820) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f893130,ffff80002a06a200,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a06a200,0,ffff80002a06a2c0) at dofilewritev+0x23c sys/kern/sys_generic.c:375 sys_writev(ffff8000ffffdbe8,ffff80002a06a370,ffff80002a06a2c0) at sys_writev+0xd8 sys/kern/sys_generic.c:322 syscall(ffff80002a06a370) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a370) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734753991e00, count: -8 ddb{0}> show registers rdi 0xffff80002643276f rsi 0 rbp 0xffff80002a069f00 rbx 0xbc76f acpi_pdirpa+0xa85e0 rdx 0x1 rcx 0x1 rax 0 r8 0x3890 __ALIGN_SIZE+0x2890 r9 0xffff80002a069e60 r10 0x7e6cdc326d821e1a r11 0xffff80002643276f r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x76f r14 0xfffffd806e2587e8 r15 0x1 rip 0xffffffff81def949 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a069cf8 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{0}> show proc PROC (syslogd) tid=81169 pid=41960 tcnt=1 stat=onproc flags process=19100010 proc=0 runpri=17, usrpri=51, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd960,0xffff8000ffffc7b8 process=0xffff8000ffff9690 user=0xffff80002a065000, vmspace=0xfffffd806ecb8378 estcpu=1, cpticks=5, pctcpu=1.55, user=11, sys=594, intr=369 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99981 52709 42991 0 2 0x8000000 syz-executor 99981 502877 42991 0 3 0xc000080 sbwait syz-executor 18206 407530 69876 0 2 0x8000000 syz-executor 18206 162114 69876 0 3 0xc000080 fsleep syz-executor 53184 444788 94666 0 2 0x8000000 syz-executor 12110 267268 22687 0 2 0x8000000 syz-executor 12110 382510 22687 0 3 0xc000080 sbwait syz-executor 12110 322728 22687 0 3 0xc000080 sbwait syz-executor 12110 30292 22687 0 3 0xc000080 fsleep syz-executor 51052 364975 17396 0 2 0x8000000 syz-executor 51052 498258 17396 0 2 0xc000000 syz-executor 43302 220916 74876 0 2 0x8000000 syz-executor 43302 218357 74876 0 3 0xc000080 sbwait syz-executor 43302 204840 74876 0 3 0xc000080 fsleep syz-executor 25638 391738 79233 0 2 0x8000000 syz-executor 25638 61878 79233 0 3 0xc000080 fsleep syz-executor 22687 113129 72842 0 2 0x8000482 syz-executor 23472 411777 72842 0 2 0x8000002 syz-executor 42991 340496 72842 0 2 0x8000482 syz-executor 69876 396359 72842 0 2 0x8000482 syz-executor 79233 122625 72842 0 2 0x8000482 syz-executor 94666 157537 72842 0 2 0x8000482 syz-executor 17396 42295 72842 0 2 0x8000482 syz-executor 74876 31038 72842 0 2 0x8000482 syz-executor 68710 196446 0 0 3 0x14200 acct acct 7611 101785 0 0 3 0x14200 bored sosplice 72842 349065 8650 0 3 0x8000082 kqread syz-executor 8650 366808 83511 0 3 0x810008a sigsusp ksh 83511 175901 29366 0 3 0x18000098 kqread sshd-session 29366 178512 25946 0 3 0x18000092 kqread sshd-session 14173 65732 1 0 3 0x18100083 ttyin getty 25946 137425 1 0 3 0x18000088 kqread sshd 24943 64828 92880 74 3 0x19100092 bpf pflogd 92880 460755 1 0 3 0x18000080 sbwait pflogd *41960 81169 88752 73 7 0x19100010 syslogd 88752 45398 1 0 3 0x18100082 sbwait syslogd 16005 193200 1 0 3 0x18100080 kqread resolvd 8724 512843 34500 77 3 0x18100092 kqread dhcpleased 37563 273740 34500 77 3 0x18100092 kqread dhcpleased 34500 36224 1 0 3 0x18000080 kqread dhcpleased 42394 503841 0 0 3 0x14200 bored smr 72917 66047 0 0 2 0x14200 zerothread 83973 258238 0 0 3 0x14200 aiodoned aiodoned 8739 368130 0 0 3 0x14200 syncer update 403 452614 0 0 3 0x14200 cleaner cleaner 5645 161568 0 0 3 0x14200 reaper reaper 69494 352228 0 0 3 0x14200 pgdaemon pagedaemon 16276 111807 0 0 3 0x14200 bored viomb 15723 330315 0 0 3 0x40014200 acpi0 acpi0 74524 101908 0 0 7 0x40014200 idle1 67384 320141 0 0 3 0x14200 bored softnet3 58977 181773 0 0 3 0x14200 bored softnet2 52074 73416 0 0 3 0x14200 bored softnet1 88130 207743 0 0 3 0x14200 bored softnet0 39962 338309 0 0 3 0x14200 bored systqmp 12564 447108 0 0 3 0x14200 bored systq 87575 347168 0 0 3 0x14200 tmoslp softclockmp 7039 92613 0 0 3 0x40014200 tmoslp softclock 29454 464298 0 0 3 0x40014200 idle0 1 487076 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 23472 (syz-executor) thread 0xffff8000371c8548 (411777) exclusive rrwlock inode r = 0 (0xfffffd8068d76a28) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:120 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3100 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c2ab0a8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3085 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 41960 (syslogd) thread 0xffff8000ffffdbe8 (81169) exclusive rrwlock inode r = 0 (0xfffffd806e4a15f0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:375 #7 sys_writev+0xd8 sys/kern/sys_generic.c:322 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8357c390) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vn_write+0x4e sys/kern/vfs_vnops.c:393 #2 dofilewritev+0x23c sys/kern/sys_generic.c:375 #3 sys_writev+0xd8 sys/kern/sys_generic.c:322 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 10307K 10527K 166960K 12075 0 pcb 17 15K 17K 166960K 195 0 rtable 203 6K 7K 166960K 1397 0 pf 32 9K 10K 166960K 130 0 ifaddr 43 15K 16K 166960K 193 0 ifgroup 55 2K 2K 166960K 218 0 sysctl 1 0K 2K 166960K 2 0 counters 64 36K 36K 166960K 146 0 ioctlops 0 0K 4K 166960K 1552 0 iov 0 0K 12K 166960K 57 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1446 91K 91K 166960K 2403 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 151 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 93K 166960K 1047 0 sigio 0 0K 0K 166960K 15 0 proc 70 91K 116K 166960K 1493 0 subproc 104 6K 7K 166960K 548 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 75 0 in_multi 89 6K 7K 166960K 468 0 ether_multi 1 0K 0K 166960K 3 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 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 913 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 77K 91K 166960K 9374 0 UVM aobj 21 6K 6K 166960K 23 0 pinsyscall 42 84K 104K 166960K 2974 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 32 0 NDP 16 0K 2K 166960K 135 0 temp 75 6816K 6882K 166960K 39359 0 kqueue 13 20K 29K 166960K 101 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 205 0 202 3 2 1 3 0 8 0 rtentry 112 495 0 402 4 1 3 4 0 8 0 unpcb 144 841 0 810 9 7 2 4 0 8 0 syncache 336 7 0 7 3 3 0 1 0 8 0 tcpcb 808 335 0 329 12 8 4 8 0 8 3 arp 120 91 0 73 1 0 1 1 0 8 0 inpcb 336 1263 0 1253 24 19 5 13 0 8 3 nd6 136 128 0 107 1 0 1 1 0 8 0 pkpcb 40 3 0 3 3 3 0 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 ppxss 1168 4 0 4 2 2 0 1 0 8 0 pffrag 232 7 0 4 1 0 1 1 0 482 0 pffrnode 88 7 0 4 1 0 1 1 0 8 0 pffrent 40 52 0 49 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 73 0 44 1 0 1 1 0 8 0 pfstkey 128 73 0 44 2 0 2 2 0 8 0 pfstate 376 73 0 44 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1972 0 1563 32 3 29 29 0 8 3 art_table 32 1973 0 1563 4 0 4 4 0 8 0 art_node 16 493 0 409 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 1 0 1 1 0 8 0 semapl 112 148 0 138 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2471 0 896 99 0 99 99 0 8 0 ffsino 272 2471 0 896 106 0 106 106 0 8 0 nchpl 144 3354 0 1628 65 0 65 65 0 8 0 uvmvnodes 80 3390 0 0 70 0 70 70 0 8 0 vnodes 216 3390 0 0 189 0 189 189 0 8 0 namei 1024 15810 0 15809 4 3 1 2 0 8 0 percpumem 16 87 0 41 1 0 1 1 0 8 0 vcpupl 3904 2 0 0 1 0 1 1 0 8 0 vmpool 696 2 0 0 1 0 1 1 0 8 0 kstatmem 264 106 0 82 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 24790 0 24790 11 10 1 8 1 8 1 plimitpl 152 205 0 188 1 0 1 1 0 8 0 sigapl 424 1279 0 1228 9 3 6 7 0 8 0 futexpl 64 8651 0 8647 4 3 1 1 0 8 0 knotepl 120 594 0 0 18 0 18 18 0 8 0 kqueuepl 216 415 0 405 5 4 1 5 0 8 0 pipepl 320 253 0 226 3 0 3 3 0 8 0 fdescpl 496 1259 0 1228 7 2 5 5 0 8 0 filepl 152 8939 0 8677 35 20 15 21 0 8 4 lockfpl 104 173 0 170 1 0 1 1 0 8 0 lockfspl 48 81 0 78 1 0 1 1 0 8 0 sessionpl 144 55 0 46 1 0 1 1 0 8 0 pgrppl 48 100 0 83 1 0 1 1 0 8 0 ucredpl 104 1274 0 1259 1 0 1 1 0 8 0 zombiepl 144 1228 0 1228 1 0 1 1 0 8 1 processpl 1152 1279 0 1228 5 1 4 5 0 8 0 procpl 648 2064 0 2004 8 1 7 7 0 8 1 sosppl 168 2 0 2 2 2 0 1 0 8 0 sockpl 664 2317 0 2273 27 20 7 15 0 8 2 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 234 0 0 30 0 30 30 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 3797 0 0 235 0 235 235 0 8 0 bufpl 280 7028 0 856 441 0 441 441 0 8 0 anonpl 24 223113 0 218913 64 10 54 58 0 185 26 amapchunkpl 152 29417 0 28879 34 1 33 33 0 158 11 amappl16 200 4211 0 4195 18 15 3 14 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 182 0 170 1 0 1 1 0 8 0 amappl13 176 28 0 27 1 0 1 1 0 8 0 amappl12 168 2423 0 2392 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 31 0 31 1 1 0 1 0 8 0 amappl9 144 190 0 190 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 170 0 158 1 0 1 1 0 8 0 amappl6 120 492 0 491 1 0 1 1 0 8 0 amappl5 112 278 0 265 1 0 1 1 0 8 0 amappl4 104 419 0 397 1 0 1 1 0 8 0 amappl3 96 5493 0 5377 4 0 4 4 0 8 0 amappl2 88 1079 0 1012 2 0 2 2 0 8 0 amappl1 80 12396 0 11815 14 1 13 14 0 8 0 amappl 88 8744 0 8566 5 0 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1261 0 1228 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1261 0 1228 1 0 1 1 0 8 0 vmmpekpl 168 12285 0 12236 3 0 3 3 0 8 0 vmmpepl 168 83992 0 82109 97 9 88 96 0 357 3 vmsppl 440 1260 0 1228 6 2 4 5 0 8 0 rwobjpl 56 29646 0 25294 63 1 62 62 0 8 0 pdppl 4096 2529 0 2458 144 69 75 85 0 8 4 pvpl 32 29418 0 0 239 2 237 237 0 265 0 pmappl 248 1260 0 1228 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 702 0 109 18 0 18 18 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memset() at memset+0x49 ffs_write(ffff80002a069fe0) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e2587e8,ffff80002a06a200,3,fffffd807f7d3820) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f893130,ffff80002a06a200,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a06a200,0,ffff80002a06a2c0) at dofilewritev+0x23c sys/kern/sys_generic.c:375 sys_writev(ffff8000ffffdbe8,ffff80002a06a370,ffff80002a06a2c0) at sys_writev+0xd8 sys/kern/sys_generic.c:322 syscall(ffff80002a06a370) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06a370) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734753991e00, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1208 sched_idle(ffff800029b7bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1208 sched_idle(ffff800029b7bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5