uvm_fault(0xffffffff829b12d0, 0x10, 0, 1) -> e kernel: page fault trap, code=0 Stopped at nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 TID PID UID PRFLAGS PFLAGS CPU COMMAND *174464 88875 0 0x14000 0x200 0K softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167b08,ffff800021167b14,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167b08,ffff800021167b14,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167b08,ffff800021167b14,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd8068ae2600) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd8068ae2600,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd8068ae2600) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167c48) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: 4 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(0xffffffff829b12d0, 0x10, 0, 1) -> e ddb{0}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167b08,ffff800021167b14,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167b08,ffff800021167b14,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167b08,ffff800021167b14,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd8068ae2600) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd8068ae2600,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd8068ae2600) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167c48) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000211676a0 rbx 0 rdx 0 rcx 0x7 rax 0xffff800021148000 r8 0xffffffff8221b7ac nd6_ns_input+0x3bc r9 0x1 r10 0xe6e1a1f6bc4f3600 r11 0xa9a48fc6601f1df3 r12 0 r13 0x2 r14 0 r15 0xffff800000d1ab00 rip 0xffffffff8221dfd8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021167620 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb{0}> show proc PROC (softnet) pid=174464 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000211482a0,0xffff800021148550 process=0xffff8000ffffd4f0 user=0xffff800021162000, vmspace=0xffffffff829b12d0 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85481 811 61073 0 2 0 syz-executor.1 85481 442464 61073 0 2 0x4000000 syz-executor.1 61073 179424 54455 0 2 0x482 syz-executor.1 34186 201507 54455 0 2 0x482 syz-executor.0 53413 357223 1 0 3 0x100083 ttyopn getty 8879 231588 0 0 3 0x14280 nfsidl nfsio 9326 322016 0 0 3 0x14280 nfsidl nfsio 75438 504500 0 0 3 0x14280 nfsidl nfsio 98801 192252 0 0 3 0x14280 nfsidl nfsio 92737 350287 0 0 3 0x14280 nfsidl nfsio 76396 252998 0 0 3 0x14280 nfsidl nfsio 27443 316225 0 0 3 0x14280 nfsidl nfsio 53189 384855 0 0 3 0x14280 nfsidl nfsio 52008 488986 0 0 3 0x14280 nfsidl nfsio 74426 24558 0 0 3 0x14280 nfsidl nfsio 44792 249517 0 0 3 0x14280 nfsidl nfsio 88694 368614 0 0 3 0x14280 nfsidl nfsio 52426 38255 0 0 3 0x14280 nfsidl nfsio 30097 446971 0 0 3 0x14280 nfsidl nfsio 20409 75433 0 0 3 0x14280 nfsidl nfsio 94827 334599 0 0 3 0x14280 nfsidl nfsio 20688 323453 0 0 3 0x14280 nfsidl nfsio 70912 385599 0 0 3 0x14280 nfsidl nfsio 29697 85731 0 0 3 0x14280 nfsidl nfsio 98573 193314 0 0 3 0x14280 nfsidl nfsio 77345 521948 0 0 3 0x14200 bored sosplice 54455 70259 88247 0 3 0x82 thrsleep syz-fuzzer 54455 121601 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 227096 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 43160 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 314538 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 403310 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 228505 88247 0 3 0x4000082 thrsleep syz-fuzzer 54455 65734 88247 0 3 0x4000082 kqread syz-fuzzer 88247 180862 35208 0 3 0x10008a sigsusp ksh 35208 237637 81486 0 3 0x9a kqread sshd 81486 121259 1 0 3 0x88 kqread sshd 91167 352891 67281 74 3 0x100092 bpf pflogd 67281 270002 1 0 3 0x80 netio pflogd 35543 301803 57624 73 3 0x100090 kqread syslogd 57624 60143 1 0 3 0x100082 netio syslogd 57525 283455 1 0 3 0x100080 kqread resolvd 36261 362045 0 0 3 0x14200 bored smr 54218 127188 0 0 2 0x14200 zerothread 50590 416192 0 0 3 0x14200 aiodoned aiodoned 76145 418957 0 0 3 0x14200 syncer update 81597 403973 0 0 3 0x14200 cleaner cleaner 91555 181577 0 0 3 0x14200 reaper reaper 7982 133215 0 0 3 0x14200 pgdaemon pagedaemon 65241 400885 0 0 3 0x14200 bored viomb 20341 396841 0 0 3 0x40014200 acpi0 acpi0 35885 234648 0 0 7 0x40014200 idle1 *88875 174464 0 0 7 0x14200 softnet 70528 454305 0 0 2 0x14200 systqmp 48072 475897 0 0 3 0x14200 bored systq 58642 220319 0 0 2 0x40014200 softclock 88151 319820 0 0 3 0x40014200 idle0 1 58321 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 88875 (softnet) thread 0xffff800021148000 (174464) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8294f760) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 kpageflttrap+0x229 sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 #5 nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] #5 nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 #6 icmp6_input+0xabe sys/netinet6/icmp6.c:686 #7 ip_deliver+0x322 sys/netinet/ip_input.c:658 #8 ip6_input_if+0x978 #9 ipv6_input+0x48 sys/netinet6/ip6_input.c:171 #10 if_input_local+0x136 sys/net/if.c:778 #11 loinput+0x4d sys/net/if_loop.c:238 #12 if_input_process+0xd2 sys/net/if.c:843 #13 ifiq_process+0x80 sys/net/ifq.c:773 #14 taskq_thread+0xe6 sys/kern/kern_task.c:449 #15 proc_trampoline+0x1c exclusive rwlock netlock r = 0 (0xffffffff827efb90) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 if_input_process+0xa1 sys/net/if.c:843 #2 ifiq_process+0x80 sys/net/ifq.c:773 #3 taskq_thread+0xe6 sys/kern/kern_task.c:449 #4 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002c070) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 taskq_thread+0xcb sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10134 6448K 7722K 78643K 22153 0 pcb 14 8K 8K 78643K 1125 0 rtable 157 27K 27K 78643K 4371 0 ifaddr 85 24K 26K 78643K 1327 0 sysctl 2 0K 0K 78643K 2 0 counters 44 34K 34K 78643K 408 0 ioctlops 0 0K 4K 78643K 2825 0 iov 0 0K 24K 78643K 701 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1244 78K 79K 78643K 5459 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 130 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 12319 0 sigio 0 0K 0K 78643K 42 0 proc 73 63K 111K 78643K 1993 0 subproc 66 4K 4K 78643K 926 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 721 0 in_multi 30 2K 2K 78643K 2167 0 ether_multi 1 0K 0K 78643K 140 0 mrt 2 0K 0K 78643K 63 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 115 519K 519K 78643K 115 0 exec 0 0K 2K 78643K 1829 0 tdb 3 0K 0K 78643K 3 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 471 1160K 1161K 78643K 145773 0 UVM aobj 131 8K 8K 78643K 155 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 1013 0 NDP 9 0K 0K 78643K 495 0 temp 95 4216K 4296K 78643K 140113 0 kqueue 12 18K 31K 78643K 788 0 SYN cache 2 0K 16K 78643K 4 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1017 0 1016 1 0 1 1 0 8 0 rtentry 112 1506 0 1474 2 0 2 2 0 8 0 unpcb 128 5120 0 5112 2 1 1 2 0 8 0 syncache 296 30 0 30 14 14 0 1 0 8 0 tcpqe 32 107 0 107 9 9 0 1 0 8 0 tcpcb 736 2380 0 2376 43 42 1 3 0 8 0 arp 120 93 0 87 1 0 1 1 0 8 0 inpcb 304 9619 0 9611 26 25 1 3 0 8 0 rttmr 72 10 0 10 6 6 0 1 0 8 0 nd6 48 375 0 370 3 2 1 1 0 8 0 pkpcb 40 66 0 66 18 18 0 1 0 8 0 kcovpl 48 28 0 26 1 0 1 1 0 8 0 ppxss 1248 44 0 44 27 26 1 1 0 8 1 pfstscr 40 40 0 40 11 11 0 1 0 8 0 pffrag 232 98 0 97 10 9 1 1 0 482 0 pffrnode 88 98 0 97 10 9 1 1 0 8 0 pffrent 40 1540 0 1539 11 10 1 1 0 8 0 pfosfp 40 1432 0 1431 6 5 1 5 0 8 0 pfosfpen 112 1432 0 1431 22 21 1 21 0 8 0 pfrktable 1344 145 0 115 7 4 3 3 0 8 0 pftag 88 21 0 14 2 1 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 88 0 86 1 0 1 1 0 8 0 pfstkey 112 114 0 112 1 0 1 1 0 8 0 pfstate 320 92 0 90 3 2 1 3 0 8 0 pfrule 1360 524 0 405 18 7 11 11 0 8 0 art_heap8 4096 8 0 7 7 6 1 3 0 8 0 art_heap4 256 11248 0 11064 69 57 12 13 0 8 0 art_table 32 11256 0 11071 9 7 2 2 0 8 0 art_node 16 1501 0 1470 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 8 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 152 0 24 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17429 0 15991 92 1 91 91 0 8 0 ffsino 272 17429 0 15991 98 1 97 97 0 8 0 nchpl 144 35310 0 34846 61 42 19 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 113548 0 113548 16 15 1 1 0 8 1 percpumem 16 216 0 182 1 0 1 1 0 8 0 vcpupl 2048 112 0 1 14 0 14 14 0 8 0 vmpool 560 159 0 48 8 0 8 8 0 8 0 pfiaddrpl 120 86 0 44 2 0 2 2 0 8 0 scsiplug 72 8 0 8 8 8 0 1 0 8 0 scxspl 216 111937 0 111937 17 16 1 8 0 8 1 plimitpl 152 701 0 693 1 0 1 1 0 8 0 sigapl 424 12525 0 12475 7 0 7 7 0 8 0 futexpl 64 199970 0 199970 17 16 1 1 0 8 1 knotepl 112 228 0 0 3 0 3 3 0 8 0 kqueuepl 216 2111 0 2092 28 26 2 2 0 8 0 pipepl 336 1689 0 1679 19 17 2 2 0 8 0 fdescpl 496 12487 0 12472 3 0 3 3 0 8 0 filepl 152 68724 0 68591 18 12 6 8 0 8 0 lockfpl 104 11772 0 11770 1 0 1 1 0 8 0 lockfspl 48 3382 0 3380 1 0 1 1 0 8 0 sessionpl 144 46 0 36 1 0 1 1 0 8 0 pgrppl 48 549 0 539 1 0 1 1 0 8 0 ucredpl 96 8547 0 8538 1 0 1 1 0 8 0 zombiepl 144 12475 0 12474 3 2 1 1 0 8 0 processpl 1072 12525 0 12474 4 0 4 4 0 8 0 procpl 672 26657 0 26598 6 0 6 6 0 8 0 srpgc 96 6 0 6 3 3 0 1 0 8 0 sosppl 168 130 0 130 38 38 0 1 0 8 0 sockpl 480 15849 0 15832 44 40 4 7 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 409 0 0 35 1 34 34 0 8 0 mtagpl 96 552 0 0 13 10 3 13 0 8 0 mbufpl 256 1645 0 0 79 0 79 79 0 8 0 bufpl 280 32813 0 26484 453 0 453 453 0 8 0 anonpl 24 3331078 0 3314961 456 352 104 126 0 186 0 amapchunkpl 152 353411 0 352785 227 200 27 41 0 158 0 amappl16 200 34870 0 34297 314 283 31 43 0 8 0 amappl15 192 1019 0 1012 1 0 1 1 0 8 0 amappl14 184 1716 0 1714 1 0 1 1 0 8 0 amappl13 176 5693 0 5692 1 0 1 1 0 8 0 amappl12 168 586 0 582 1 0 1 1 0 8 0 amappl11 160 762 0 749 1 0 1 1 0 8 0 amappl10 152 1589 0 1581 1 0 1 1 0 8 0 amappl9 144 1821 0 1820 1 0 1 1 0 8 0 amappl8 136 977 0 911 3 0 3 3 0 8 0 amappl7 128 163 0 155 1 0 1 1 0 8 0 amappl6 120 1736 0 1727 1 0 1 1 0 8 0 amappl5 112 10266 0 10237 1 0 1 1 0 8 0 amappl4 104 2714 0 2686 1 0 1 1 0 8 0 amappl3 96 4393 0 4370 1 0 1 1 0 8 0 amappl2 88 18369 0 18313 9 7 2 2 0 8 0 amappl1 80 201138 0 200718 13 3 10 13 0 8 0 amappl 88 144618 0 144377 6 0 6 6 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 64 154 0 24 3 0 3 3 0 8 0 uaddrrnd 24 12646 0 12520 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12646 0 12520 1 0 1 1 0 8 0 vmmpekpl 168 63742 0 63691 4 1 3 3 0 8 0 vmmpepl 168 1104476 0 1102432 628 534 94 116 0 357 0 vmsppl 368 12645 0 12520 17 5 12 12 0 8 0 rwobjpl 56 247005 0 245573 89 67 22 24 0 8 0 pdppl 4096 25300 0 25151 244 93 151 151 0 8 2 pvpl 32 5813563 0 5794071 674 501 173 230 0 265 6 pmappl 224 12645 0 12520 13 5 8 8 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 763 0 247 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a229300,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167b08,ffff800021167b14,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167b08,ffff800021167b14,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167b08,ffff800021167b14,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd8068ae2600) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd8068ae2600,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd8068ae2600) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167c48) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5