uvm_fault(0xffffffff828743c8, 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 * 77419 36508 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6c98,ffff8000215f6ca4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8064e9c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8064e9c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8064e9c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6dd8) 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(0xffffffff828743c8, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6c98,ffff8000215f6ca4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8064e9c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8064e9c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8064e9c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6dd8) 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 0xffff8000215f6820 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe000 r8 0xffffffff81b71745 nd6_ns_input+0x395 r9 0x1 r10 0xfae2dc111f3eadb r11 0xa3e26dba25fc46f4 r12 0 r13 0x2 r14 0 r15 0xffff800000e3d200 rip 0xffffffff81b73e98 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f67a0 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=77419 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe2a0,0xffff8000ffffe7f0 process=0xffff8000ffffc000 user=0xffff8000215f1000, vmspace=0xffffffff828743c8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 79080 435827 32293 0 2 0 syz-executor.0 79080 515204 32293 0 2 0x4000000 syz-executor.0 38070 390061 48133 0 2 0x2 syz-executor.1 32293 355861 48133 0 3 0x82 nanoslp syz-executor.0 82176 384857 1 0 3 0x100083 ttyin getty 57522 457573 0 0 3 0x14200 acct acct 34723 206186 0 0 3 0x14200 bored sosplice 48133 12606 48473 0 3 0x82 thrsleep syz-fuzzer 48133 42255 48473 0 3 0x4000082 nanoslp syz-fuzzer 48133 169960 48473 0 3 0x4000082 thrsleep syz-fuzzer 48133 431720 48473 0 3 0x4000082 thrsleep syz-fuzzer 48133 201565 48473 0 3 0x4000082 thrsleep syz-fuzzer 48133 386329 48473 0 3 0x4000082 thrsleep syz-fuzzer 48133 46968 48473 0 3 0x4000082 kqread syz-fuzzer 48473 185927 21898 0 3 0x10008a sigsusp ksh 21898 154990 43773 0 3 0x9a kqread sshd 43773 358310 1 0 3 0x88 kqread sshd 11440 335868 8739 73 3 0x100090 kqread syslogd 8739 263599 1 0 3 0x100082 netio syslogd 97892 315209 1 0 3 0x100080 kqread resolvd 32909 400067 81792 77 3 0x100092 kqread dhcpleased 85300 458409 81792 77 3 0x100092 kqread dhcpleased 81792 269776 1 0 3 0x80 kqread dhcpleased 58712 434393 0 0 3 0x14200 bored smr 83644 85805 0 0 2 0x14200 zerothread 87795 433079 0 0 3 0x14200 aiodoned aiodoned 87653 192292 0 0 2 0x14600 update 38111 362951 0 0 3 0x14200 cleaner cleaner 31723 204571 0 0 3 0x14200 reaper reaper 63089 131388 0 0 3 0x14200 pgdaemon pagedaemon 41270 505602 0 0 3 0x14200 bored viomb 588 453074 0 0 3 0x40014200 acpi0 acpi0 *36508 77419 0 0 7 0x14200 softnet 49233 119110 0 0 2 0x14200 systqmp 8387 501200 0 0 3 0x14200 bored systq 8300 228368 0 0 3 0x40014200 bored softclock 82397 335996 0 0 3 0x40014200 idle0 1 514687 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 10145 6376K 8144K 78643K 108318 0 pcb 14 18K 20K 78643K 2853 0 rtable 165 24K 26K 78643K 8507 0 ifaddr 84 27K 29K 78643K 2983 0 sysctl 2 0K 0K 78643K 2 0 counters 22 16K 17K 78643K 387 0 ioctlops 0 0K 4K 78643K 11644 0 iov 0 0K 16K 78643K 2240 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1519 95K 96K 78643K 30468 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 231 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 2798 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 24342 0 sigio 0 0K 0K 78643K 243 0 proc 108 58K 74K 78643K 3105 0 subproc 26 1K 1K 78643K 975 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1185 0 in_multi 20 1K 2K 78643K 2490 0 ether_multi 1 0K 0K 78643K 459 0 mrt 2 0K 0K 78643K 78 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 5189 0 pfkey data 0 0K 1K 78643K 7 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 543 1589K 1610K 78643K 294438 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2292 0 NDP 7 0K 0K 78643K 659 0 temp 104 4226K 4808K 78643K 284004 0 kqueue 12 18K 26K 78643K 1016 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 1980 0 1977 29 28 1 3 0 8 0 rtentry 112 1494 0 1466 5 3 2 2 0 8 0 unpcb 128 17772 0 17759 165 164 1 7 0 8 0 syncache 296 49 0 49 16 16 0 1 0 8 0 tcpqe 32 402 100 402 1 1 0 1 0 8 0 tcpcb 736 8482 0 8478 303 302 1 15 0 8 0 arp 88 196 0 192 1 0 1 1 0 8 0 ipq 40 204 0 204 16 16 0 1 0 8 0 ipqe 40 1727 0 1727 16 16 0 1 0 8 0 inpcb 304 27258 0 27247 383 382 1 13 0 8 0 rttmr 72 36 0 36 10 10 0 1 0 8 0 ip6q 72 27 0 27 4 4 0 1 0 8 0 ip6af 40 51 0 51 4 4 0 1 0 8 0 nd6 48 382 0 379 3 2 1 1 0 8 0 pkpcb 40 203 0 203 16 16 0 1 0 8 0 kcovpl 48 75 0 73 2 1 1 1 0 8 0 ppxss 1152 121 0 121 26 25 1 1 0 8 1 pfstscr 40 1540 0 1538 6 5 1 1 0 8 0 pffrag 232 110 0 110 18 18 0 1 0 482 0 pffrnode 88 110 0 110 18 18 0 1 0 8 0 pffrent 40 1246 0 1246 18 18 0 1 0 8 0 pfosfp 40 8 0 5 1 0 1 1 0 8 0 pfosfpen 112 8 0 1 1 0 1 1 0 8 0 pfrktable 1344 1839 0 1798 15 11 4 4 0 8 0 pftag 88 416 0 405 5 4 1 1 0 8 0 pfqueue 264 75 0 70 1 0 1 1 0 8 0 pfstitem 24 476 0 472 6 5 1 1 0 8 0 pfstkey 112 2990 0 2986 8 7 1 1 0 8 0 pfstate 320 1497 0 1495 8 7 1 1 0 8 0 pfrule 1360 3430 0 2964 45 6 39 39 0 8 0 art_heap8 4096 11 0 8 8 5 3 4 0 8 0 art_heap4 256 6729 0 6605 58 48 10 17 0 8 2 art_table 32 6740 0 6613 5 3 2 3 0 8 0 art_node 16 1477 0 1451 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 14 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 2793 0 2783 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 33933 0 32473 93 1 92 92 0 8 0 ffsino 240 33933 0 32473 87 0 87 87 0 8 0 nchpl 144 69133 0 67545 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 260728 0 260727 33 32 1 1 0 8 0 vcpupl 1984 122 0 0 16 0 16 16 0 8 0 vmpool 528 415 0 293 10 1 9 9 0 8 0 pfiaddrpl 120 965 0 758 13 6 7 7 0 8 0 scsiplug 72 23 0 23 7 7 0 1 0 8 0 scxspl 216 246696 0 246696 70 68 2 8 0 8 2 plimitpl 152 2480 0 2472 1 0 1 1 0 8 0 sigapl 424 24383 0 24352 7 2 5 7 0 8 0 futexpl 64 252856 0 252856 29 28 1 1 0 8 1 knotepl 112 179008 0 178965 3 1 2 3 0 8 0 kqueuepl 184 6593 0 6568 123 121 2 8 0 8 0 pipepl 304 4597 0 4587 141 140 1 10 0 8 0 fdescpl 432 24347 0 24331 9 7 2 3 0 8 0 filepl 120 196126 0 196021 309 301 8 17 0 8 4 lockfpl 104 7388 0 7386 20 19 1 2 0 8 0 lockfspl 48 2224 0 2222 1 0 1 1 0 8 0 sessionpl 144 98 0 88 1 0 1 1 0 8 0 pgrppl 48 207 0 197 1 0 1 1 0 8 0 ucredpl 96 22449 0 22439 1 0 1 1 0 8 0 zombiepl 144 24352 0 24352 13 12 1 1 0 8 1 processpl 1000 24383 0 24352 8 3 5 7 0 8 0 procpl 672 60699 0 60661 39 34 5 7 0 8 0 sosppl 168 149 0 149 18 18 0 1 0 8 0 sockpl 448 47237 0 47210 930 926 4 26 0 8 1 mcl64k 65536 1136 0 1136 73 72 1 1 0 8 1 mcl16k 16384 178 0 178 54 54 0 1 0 8 0 mcl12k 12288 719 0 719 66 65 1 1 0 8 1 mcl9k 9216 319 0 319 66 66 0 1 0 8 0 mcl8k 8192 2004 0 2004 60 59 1 1 0 8 1 mcl4k 4096 2830 0 2830 48 47 1 1 0 8 1 mcl2k2 2112 161 0 161 63 62 1 1 0 8 1 mcl2k 2048 127904 0 127854 40 32 8 14 0 8 0 mtagpl 96 5176 0 5166 70 69 1 12 0 8 0 mbufpl 256 447222 0 446957 1649 1629 20 389 0 8 1 bufpl 280 48253 0 41854 458 0 458 458 0 8 0 anonpl 24 6721648 0 6699689 539 379 160 160 0 188 15 amapchunkpl 152 786065 0 785434 301 274 27 40 0 158 0 amappl16 200 65488 0 64513 293 228 65 65 0 8 10 amappl15 192 2839 0 2833 1 0 1 1 0 8 0 amappl14 184 4922 0 4919 1 0 1 1 0 8 0 amappl13 176 1922 0 1921 1 0 1 1 0 8 0 amappl12 168 2865 0 2864 1 0 1 1 0 8 0 amappl11 160 1504 0 1489 1 0 1 1 0 8 0 amappl10 152 459 0 457 1 0 1 1 0 8 0 amappl9 144 6585 0 6582 1 0 1 1 0 8 0 amappl8 136 7566 0 7500 4 1 3 3 0 8 0 amappl7 128 6230 0 6222 1 0 1 1 0 8 0 amappl6 120 6680 0 6667 1 0 1 1 0 8 0 amappl5 112 20247 0 20227 1 0 1 1 0 8 0 amappl4 104 6886 0 6855 1 0 1 1 0 8 0 amappl3 96 4932 0 4916 1 0 1 1 0 8 0 amappl2 88 27874 0 27792 2 0 2 2 0 8 0 amappl1 80 401945 0 401529 13 3 10 12 0 8 0 amappl 88 292430 0 292157 8 1 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 64 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 24762 0 24624 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 24762 0 24624 1 0 1 1 0 8 0 vmmpekpl 168 137132 0 137089 4 1 3 3 0 8 0 vmmpepl 168 2198896 0 2196475 864 726 138 140 0 357 22 vmsppl 272 24761 0 24624 11 1 10 10 0 8 0 rwobjpl 24 501712 0 499845 47 34 13 13 0 8 0 pdppl 4096 49530 0 49370 267 105 162 164 0 8 2 pvpl 32 11312427 0 11291909 823 618 205 245 0 265 22 pmappl 192 24761 0 24624 7 0 7 7 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 3765 0 3321 42 27 15 23 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(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6c98,ffff8000215f6ca4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8064e9c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8064e9c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8064e9c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6dd8) 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(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806a151d00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6c98,ffff8000215f6ca4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6c98,ffff8000215f6ca4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8064e9c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8064e9c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8064e9c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6dd8) 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>