uvm_fault(0xffffffff82848758, 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 *136945 84666 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6228,ffff8000215f6234,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6228,ffff8000215f6234,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6228,ffff8000215f6234,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807ea7cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807ea7cc00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807ea7cc00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6368) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ac410) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002b080) at taskq_thread+0x8d 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82848758, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6228,ffff8000215f6234,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6228,ffff8000215f6234,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6228,ffff8000215f6234,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807ea7cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807ea7cc00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807ea7cc00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6368) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ac410) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002b080) at taskq_thread+0x8d sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000215f5db0 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe000 r8 0xffffffff812905f5 nd6_ns_input+0x395 r9 0x1 r10 0x7cc8896fea6c42b r11 0xf0a446f26a84a1db r12 0 r13 0x2 r14 0 r15 0xffff800000dd2000 rip 0xffffffff81292d48 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f5d30 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=136945 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe540,0xffff8000ffffe2b0 process=0xffff8000ffffcfa0 user=0xffff8000215f1000, vmspace=0xffffffff82848758 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46751 352034 80727 0 2 0 syz-executor.1 46751 93271 80727 0 2 0x4000000 syz-executor.1 89736 85445 2177 0 3 0x80 nanoslp syz-executor.0 89736 37760 2177 0 3 0x4000080 ttyretype syz-executor.0 9273 161100 0 0 3 0x14280 nfsidl nfsio 76544 195431 0 0 3 0x14280 nfsidl nfsio 11030 399148 0 0 3 0x14280 nfsidl nfsio 76009 471309 0 0 3 0x14280 nfsidl nfsio 93315 72785 0 0 3 0x14280 nfsidl nfsio 70611 516294 0 0 3 0x14280 nfsidl nfsio 74412 140940 0 0 3 0x14280 nfsidl nfsio 43333 186454 0 0 3 0x14280 nfsidl nfsio 90002 300588 0 0 3 0x14280 nfsidl nfsio 32058 515909 0 0 3 0x14280 nfsidl nfsio 54973 218901 0 0 3 0x14280 nfsidl nfsio 8383 440749 0 0 3 0x14280 nfsidl nfsio 82046 457032 0 0 3 0x14280 nfsidl nfsio 28341 247146 0 0 3 0x14280 nfsidl nfsio 90641 461598 0 0 3 0x14280 nfsidl nfsio 1959 331179 0 0 3 0x14280 nfsidl nfsio 76156 418145 0 0 3 0x14280 nfsidl nfsio 39642 55971 0 0 3 0x14280 nfsidl nfsio 67971 482273 0 0 3 0x14280 nfsidl nfsio 4831 278690 0 0 3 0x14280 nfsidl nfsio 80727 421657 78029 0 3 0x82 nanoslp syz-executor.1 18154 128579 0 0 3 0x14200 acct acct 2177 162379 78029 0 3 0x82 nanoslp syz-executor.0 46345 259985 1 0 3 0x100083 ttyin getty 61629 116644 0 0 3 0x14200 bored sosplice 78029 41966 72 0 3 0x82 thrsleep syz-fuzzer 78029 61404 72 0 3 0x4000082 thrsleep syz-fuzzer 78029 502732 72 0 3 0x4000082 thrsleep syz-fuzzer 78029 174475 72 0 3 0x4000082 thrsleep syz-fuzzer 78029 188892 72 0 3 0x4000082 thrsleep syz-fuzzer 78029 93453 72 0 3 0x4000082 thrsleep syz-fuzzer 78029 515940 72 0 3 0x4000082 kqread syz-fuzzer 72 162089 25549 0 3 0x10008a sigsusp ksh 25549 105500 67108 0 3 0x9a kqread sshd 67108 351360 1 0 3 0x88 kqread sshd 39289 305864 95593 73 3 0x100090 kqread syslogd 95593 4816 1 0 3 0x100082 netio syslogd 96452 510709 1 0 3 0x100080 kqread resolvd 74957 517670 0 0 3 0x14200 bored smr 45516 362619 0 0 2 0x14200 zerothread 93074 524133 0 0 3 0x14200 aiodoned aiodoned 71846 185836 0 0 3 0x14200 syncer update 19132 482047 0 0 3 0x14200 cleaner cleaner 97638 288479 0 0 3 0x14200 reaper reaper 92391 352043 0 0 3 0x14200 pgdaemon pagedaemon 11354 394918 0 0 3 0x14200 bored viomb 68669 40579 0 0 3 0x40014200 acpi0 acpi0 *84666 136945 0 0 7 0x14200 softnet 7646 458944 0 0 2 0x14200 systqmp 90806 276383 0 0 3 0x14200 bored systq 4662 245517 0 0 3 0x40014200 bored softclock 79175 233266 0 0 3 0x40014200 idle0 1 76091 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10140 6370K 6972K 78643K 18125 0 pcb 14 22K 27K 78643K 38670 0 rtable 114 24K 27K 78643K 6884 0 ifaddr 61 22K 28K 78643K 3318 0 sysctl 2 0K 2K 78643K 41 0 counters 21 16K 17K 78643K 424 0 ioctlops 0 0K 4K 78643K 10720 0 iov 0 0K 28K 78643K 3572 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1249 78K 79K 78643K 8846 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 225 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 2832 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 31285 0 sigio 0 0K 0K 78643K 613 0 proc 59 39K 71K 78643K 3401 0 subproc 26 1K 1K 78643K 1007 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1701 0 in_multi 9 0K 2K 78643K 2878 0 ether_multi 1 0K 0K 78643K 718 0 mrt 1 0K 0K 78643K 117 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 7447 0 pfkey data 0 0K 1K 78643K 5 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 664 2101K 2102K 78643K 381390 0 UVM aobj 131 8K 8K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2638 0 NDP 6 0K 0K 78643K 691 0 temp 96 4218K 6266K 78643K 340554 0 kqueue 12 22K 38K 78643K 1223 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 2513 0 2512 37 36 1 5 0 8 0 rtentry 112 1442 0 1427 2 0 2 2 0 8 0 unpcb 128 20284 0 20278 208 207 1 9 0 8 0 syncache 296 84 0 84 26 26 0 1 0 8 0 tcpqe 32 44 307 44 5 5 0 1 0 8 0 tcpcb 736 14248 0 14244 459 458 1 27 0 8 0 arp 88 226 0 224 1 0 1 1 0 8 0 ipq 40 254 0 254 36 35 1 1 0 8 1 ipqe 40 2549 0 2549 36 35 1 1 0 8 1 inpcb 304 112517 0 112509 1055 1049 6 21 0 8 5 rttmr 72 23 0 23 7 7 0 1 0 8 0 ip6q 72 4 0 4 3 3 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 48 381 0 381 6 5 1 1 0 8 1 pkpcb 40 294 0 294 23 23 0 2 0 8 0 kcovpl 48 77 0 75 1 0 1 1 0 8 0 ppxss 1152 163 0 163 33 33 0 1 0 8 0 pfstscr 40 77 0 77 7 7 0 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 817 0 791 15 12 3 3 0 8 0 pftag 88 110 0 99 2 1 1 1 0 8 0 pfqueue 264 78 0 41 3 0 3 3 0 8 0 pfstitem 24 128 0 128 8 8 0 1 0 8 0 pfstkey 112 272 0 272 11 11 0 1 0 8 0 pfstate 320 141 0 141 11 11 0 1 0 8 0 pfrule 1360 2258 0 2041 21 2 19 19 0 8 0 art_heap8 4096 17 0 15 9 7 2 3 0 8 0 art_heap4 256 8283 0 8222 82 74 8 15 0 8 4 art_table 32 8300 0 8237 8 6 2 2 0 8 0 art_node 16 1426 0 1414 1 0 1 1 0 8 0 semapl 112 2794 0 2784 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 43825 0 42354 95 2 93 93 0 8 0 ffsino 240 43825 0 42354 87 0 87 87 0 8 0 nchpl 144 85412 0 83814 60 0 60 60 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 297784 0 297784 21 20 1 1 0 8 1 vcpupl 1984 327 0 1 41 0 41 41 0 8 0 vmpool 528 445 0 119 25 3 22 22 0 8 0 pfiaddrpl 120 1515 0 1453 6 4 2 2 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 282765 0 282765 88 87 1 8 0 8 1 plimitpl 152 3456 0 3448 1 0 1 1 0 8 0 sigapl 424 31362 0 31313 10 4 6 6 0 8 0 futexpl 64 365857 0 365857 19 18 1 1 0 8 1 knotepl 112 230919 0 230892 2 0 2 2 0 8 0 kqueuepl 184 9471 0 9456 157 156 1 7 0 8 0 pipepl 304 6065 0 6055 206 201 5 11 0 8 4 fdescpl 432 31279 0 31265 14 12 2 3 0 8 0 filepl 120 294786 0 294696 418 412 6 12 0 8 3 lockfpl 104 7697 0 7696 13 12 1 4 0 8 0 lockfspl 48 2138 0 2137 1 0 1 1 0 8 0 sessionpl 144 98 0 89 1 0 1 1 0 8 0 pgrppl 48 316 0 307 1 0 1 1 0 8 0 ucredpl 96 27226 0 27218 1 0 1 1 0 8 0 zombiepl 144 31313 0 31313 2 1 1 1 0 8 1 processpl 1000 31362 0 31313 19 12 7 7 0 8 0 procpl 672 80487 0 80430 96 90 6 7 0 8 1 sosppl 168 239 0 239 41 41 0 1 0 8 0 sockpl 448 135907 0 135892 2282 2273 9 33 0 8 7 mcl64k 65536 1377 0 1377 96 95 1 1 0 8 1 mcl16k 16384 263 0 263 71 70 1 1 0 8 1 mcl12k 12288 879 0 879 103 103 0 1 0 8 0 mcl9k 9216 574 0 570 78 77 1 1 0 8 0 mcl8k 8192 2482 0 2479 65 64 1 1 0 8 0 mcl4k 4096 4324 0 4324 59 58 1 1 0 8 1 mcl2k2 2112 210 0 210 90 90 0 1 0 8 0 mcl2k 2048 146622 0 146443 52 28 24 27 0 8 0 mtagpl 96 292 0 292 6 6 0 4 0 8 0 mbufpl 256 556365 0 555987 3811 3779 32 550 0 8 0 bufpl 280 62660 0 56264 460 2 458 458 0 8 0 anonpl 24 8925875 0 8905326 716 569 147 153 0 188 15 amapchunkpl 152 995731 0 995079 353 327 26 40 0 158 0 amappl16 200 97821 0 96828 505 445 60 65 0 8 7 amappl15 192 5321 0 5315 1 0 1 1 0 8 0 amappl14 184 5526 0 5524 1 0 1 1 0 8 0 amappl13 176 2602 0 2600 1 0 1 1 0 8 0 amappl12 168 4201 0 4200 1 0 1 1 0 8 0 amappl11 160 4438 0 4428 1 0 1 1 0 8 0 amappl10 152 3036 0 3033 10 9 1 1 0 8 0 amappl9 144 6227 0 6227 1 1 0 1 0 8 0 amappl8 136 4563 0 4477 3 0 3 3 0 8 0 amappl7 128 3084 0 3078 1 0 1 1 0 8 0 amappl6 120 6337 0 6320 1 0 1 1 0 8 0 amappl5 112 27266 0 27248 1 0 1 1 0 8 0 amappl4 104 10708 0 10676 1 0 1 1 0 8 0 amappl3 96 6797 0 6783 1 0 1 1 0 8 0 amappl2 88 37723 0 37639 2 0 2 2 0 8 0 amappl1 80 519900 0 519526 24 15 9 12 0 8 0 amappl 88 378937 0 378634 7 0 7 7 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 64 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 31724 0 31384 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31724 0 31384 3 0 3 3 0 8 0 vmmpekpl 168 172750 0 172698 3 0 3 3 0 8 0 vmmpepl 168 2824566 0 2821852 1400 1267 133 159 0 357 12 vmsppl 272 31723 0 31384 26 3 23 23 0 8 0 rwobjpl 24 664845 0 662971 69 57 12 13 0 8 0 pdppl 4096 63454 0 63094 460 100 360 360 0 8 0 pvpl 32 14642529 0 14621911 1115 915 200 246 0 265 10 pmappl 192 31723 0 31384 19 2 17 17 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 7702 0 7035 93 72 21 30 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6228,ffff8000215f6234,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6228,ffff8000215f6234,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6228,ffff8000215f6234,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807ea7cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807ea7cc00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807ea7cc00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6368) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ac410) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002b080) at taskq_thread+0x8d sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd807ea7c900,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6228,ffff8000215f6234,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6228,ffff8000215f6234,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6228,ffff8000215f6234,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807ea7cc00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807ea7cc00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807ea7cc00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6368) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ac410) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002b080) at taskq_thread+0x8d sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11