uvm_fault(0xffffffff828c53d8, 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 *331219 85185 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6688,ffff8000215f6694,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6688,ffff8000215f6694,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6688,ffff8000215f6694,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068bb6500) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068bb6500,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068bb6500) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f67c8) 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(0xffffffff828c53d8, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6688,ffff8000215f6694,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6688,ffff8000215f6694,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6688,ffff8000215f6694,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068bb6500) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068bb6500,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068bb6500) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f67c8) 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 0xffff8000215f6210 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe2a0 r8 0xffffffff811a8b75 nd6_ns_input+0x395 r9 0x1 r10 0xb6ef50dbd388941c r11 0xd6fe7ebfdd901ed0 r12 0 r13 0x802 r14 0 r15 0xffff800000c2f800 rip 0xffffffff811ab2c8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f6190 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=331219 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe000,0xffff8000ffffe7f0 process=0xffff8000ffffc000 user=0xffff8000215f1000, vmspace=0xffffffff828c53d8 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 4995 457765 95416 0 2 0 syz-executor.0 4995 346596 95416 0 2 0x4000000 syz-executor.0 95416 500355 23025 0 2 0x482 syz-executor.0 88675 228985 23025 0 2 0x2 syz-executor.1 55555 252394 1 0 3 0x100083 ttyin getty 66939 46639 0 0 3 0x14280 nfsidl nfsio 43761 202536 0 0 3 0x14280 nfsidl nfsio 55337 56481 0 0 3 0x14280 nfsidl nfsio 4583 510599 0 0 3 0x14280 nfsidl nfsio 26627 71547 0 0 3 0x14280 nfsidl nfsio 73420 62913 0 0 3 0x14280 nfsidl nfsio 57914 257674 0 0 3 0x14280 nfsidl nfsio 99537 304172 0 0 3 0x14280 nfsidl nfsio 33211 320859 0 0 3 0x14280 nfsidl nfsio 6624 295920 0 0 3 0x14280 nfsidl nfsio 31958 392403 0 0 3 0x14280 nfsidl nfsio 57309 181179 0 0 3 0x14280 nfsidl nfsio 93862 515022 0 0 3 0x14280 nfsidl nfsio 55568 361939 0 0 3 0x14280 nfsidl nfsio 70531 87132 0 0 3 0x14280 nfsidl nfsio 87259 267715 0 0 3 0x14280 nfsidl nfsio 53377 504996 0 0 3 0x14280 nfsidl nfsio 59211 68062 0 0 3 0x14280 nfsidl nfsio 16867 195884 0 0 3 0x14280 nfsidl nfsio 57957 515447 0 0 3 0x14280 nfsidl nfsio 9866 47578 0 0 3 0x14200 bored sosplice 23025 477212 53572 0 2 0x482 syz-fuzzer 23025 61557 53572 0 3 0x4000082 nanoslp syz-fuzzer 23025 61040 53572 0 3 0x4000082 thrsleep syz-fuzzer 23025 311279 53572 0 3 0x4000082 thrsleep syz-fuzzer 23025 267993 53572 0 3 0x4000082 thrsleep syz-fuzzer 23025 75340 53572 0 3 0x4000082 thrsleep syz-fuzzer 23025 31104 53572 0 3 0x4000082 thrsleep syz-fuzzer 53572 483312 65614 0 3 0x10008a sigsusp ksh 65614 68406 42711 0 3 0x9a kqread sshd 42711 133968 1 0 3 0x88 kqread sshd 27356 175745 14955 73 3 0x100090 kqread syslogd 14955 409991 1 0 3 0x100082 netio syslogd 49887 20265 1 0 3 0x100080 kqread resolvd 59612 464322 95405 77 3 0x100092 kqread dhcpleased 1580 457033 95405 77 3 0x100092 kqread dhcpleased 95405 347115 1 0 3 0x80 kqread dhcpleased 4638 356084 0 0 3 0x14200 bored smr 56411 307668 0 0 2 0x14200 zerothread 90412 3713 0 0 3 0x14200 aiodoned aiodoned 16111 391326 0 0 3 0x14200 syncer update 99200 307661 0 0 3 0x14200 cleaner cleaner 13168 234977 0 0 3 0x14200 reaper reaper 12088 386894 0 0 3 0x14200 pgdaemon pagedaemon 77035 221042 0 0 3 0x14200 bored viomb 58395 403217 0 0 3 0x40014200 acpi0 acpi0 *85185 331219 0 0 7 0x14200 softnet 5427 119468 0 0 2 0x14200 systqmp 75644 489707 0 0 3 0x14200 bored systq 64403 462652 0 0 3 0x40014200 bored softclock 89467 509124 0 0 3 0x40014200 idle0 1 519820 0 0 3 0x82 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 10123 6389K 7930K 78643K 35625 0 pcb 13 8K 8K 78643K 672 0 rtable 125 23K 25K 78643K 1816 0 ifaddr 65 17K 19K 78643K 706 0 sysctl 2 0K 1K 78643K 4 0 counters 21 16K 16K 78643K 125 0 ioctlops 0 0K 4K 78643K 1348 0 iov 0 0K 32K 78643K 518 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1258 79K 80K 78643K 7843 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 56 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 5845 0 sigio 0 0K 0K 78643K 75 0 proc 64 55K 71K 78643K 984 0 subproc 66 4K 4K 78643K 627 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1615 0 in_multi 16 1K 2K 78643K 665 0 ether_multi 1 0K 0K 78643K 129 0 mrt 2 0K 0K 78643K 36 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 91 413K 413K 78643K 91 0 exec 0 0K 2K 78643K 1349 0 pfkey data 0 0K 1K 78643K 6 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 313 417K 418K 78643K 69809 0 UVM aobj 131 8K 8K 78643K 149 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 779 0 NDP 7 0K 0K 78643K 168 0 temp 90 4200K 6248K 78643K 49915 0 kqueue 13 20K 28K 78643K 476 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 120 379 0 376 1 0 1 1 0 8 0 rtentry 112 430 0 408 2 0 2 2 0 8 0 unpcb 128 2430 0 2417 2 1 1 2 0 8 0 syncache 296 13 0 13 4 4 0 1 0 8 0 tcpqe 32 94 0 94 2 2 0 1 0 8 0 tcpcb 736 2431 0 2427 29 27 2 3 0 8 1 arp 88 69 0 63 1 0 1 1 0 8 0 ipq 40 64 0 64 12 12 0 1 0 8 0 ipqe 40 1332 0 1332 12 12 0 1 0 8 0 inpcb 304 5602 0 5591 18 16 2 2 0 8 1 rttmr 72 12 0 12 6 6 0 1 0 8 0 nd6 48 84 0 83 4 3 1 1 0 8 0 pkpcb 40 55 0 55 19 19 0 1 0 8 0 kcovpl 48 19 0 17 1 0 1 1 0 8 0 ppxss 1152 22 0 22 15 15 0 1 0 8 0 pfstscr 40 14 0 11 1 0 1 1 0 8 0 pfrktable 1344 225 0 200 9 6 3 3 0 8 0 pftag 88 23 0 14 1 0 1 1 0 8 0 pfqueue 264 6 0 2 1 0 1 1 0 8 0 pfstitem 24 8 0 4 1 0 1 1 0 8 0 pfstkey 112 16 0 12 1 0 1 1 0 8 0 pfstate 320 8 0 6 1 0 1 1 0 8 0 pfrule 1360 227 0 171 5 0 5 5 0 8 0 art_heap8 4096 10 0 9 9 8 1 3 0 8 0 art_heap4 256 2011 0 1918 36 26 10 15 0 8 1 art_table 32 2021 0 1927 2 0 2 2 0 8 0 art_node 16 427 0 407 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 15 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 146 0 18 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8947 0 7538 89 0 89 89 0 8 0 ffsino 240 8947 0 7538 84 0 84 84 0 8 0 nchpl 144 16992 0 15398 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 57171 0 57170 5 4 1 1 0 8 0 vcpupl 1984 48 0 1 6 0 6 6 0 8 0 vmpool 528 99 0 52 6 2 4 4 0 8 0 pfiaddrpl 120 142 0 112 3 2 1 2 0 8 0 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 59539 0 59539 45 44 1 8 0 8 1 plimitpl 152 513 0 505 1 0 1 1 0 8 0 sigapl 424 6077 0 6027 6 0 6 6 0 8 0 futexpl 64 110478 0 110478 5 4 1 1 0 8 1 knotepl 112 46070 0 46027 2 0 2 2 0 8 0 kqueuepl 184 1332 0 1319 4 3 1 2 0 8 0 pipepl 304 935 0 925 25 24 1 2 0 8 0 fdescpl 432 6016 0 6000 6 4 2 3 0 8 0 filepl 120 38364 0 38219 11 6 5 6 0 8 0 lockfpl 104 1517 0 1515 1 0 1 1 0 8 0 lockfspl 48 540 0 538 1 0 1 1 0 8 0 sessionpl 144 37 0 27 1 0 1 1 0 8 0 pgrppl 48 61 0 51 1 0 1 1 0 8 0 ucredpl 96 4976 0 4966 1 0 1 1 0 8 0 zombiepl 144 6027 0 6027 3 2 1 1 0 8 1 processpl 1008 6077 0 6027 8 1 7 7 0 8 0 procpl 672 12840 0 12783 6 0 6 6 0 8 1 sosppl 168 93 0 93 23 22 1 1 0 8 1 sockpl 448 8481 0 8454 13 9 4 6 0 8 1 mcl64k 65536 236 0 236 19 18 1 1 0 8 1 mcl16k 16384 52 0 52 25 25 0 1 0 8 0 mcl12k 12288 203 0 203 15 15 0 1 0 8 0 mcl9k 9216 88 0 88 26 26 0 1 0 8 0 mcl8k 8192 310 0 304 17 16 1 1 0 8 0 mcl4k 4096 512 0 512 6 5 1 1 0 8 1 mcl2k2 2112 35 0 35 19 19 0 1 0 8 0 mcl2k 2048 84038 0 83958 28 17 11 12 0 8 0 mtagpl 96 3478 0 3292 37 32 5 13 0 8 0 mbufpl 256 181477 0 180848 225 183 42 87 0 8 1 bufpl 280 19932 0 13533 458 0 458 458 0 8 0 anonpl 24 1676221 0 1658659 369 239 130 133 0 188 21 amapchunkpl 152 176292 0 175715 169 143 26 38 0 158 1 amappl16 200 18801 0 18124 248 207 41 48 0 8 5 amappl15 192 567 0 561 1 0 1 1 0 8 0 amappl14 184 1206 0 1204 1 0 1 1 0 8 0 amappl13 176 494 0 492 1 0 1 1 0 8 0 amappl12 168 1460 0 1456 1 0 1 1 0 8 0 amappl11 160 2095 0 2080 1 0 1 1 0 8 0 amappl10 152 8 0 6 2 1 1 1 0 8 0 amappl9 144 511 0 509 1 0 1 1 0 8 0 amappl8 136 796 0 725 3 0 3 3 0 8 0 amappl7 128 120 0 112 1 0 1 1 0 8 0 amappl6 120 405 0 394 1 0 1 1 0 8 0 amappl5 112 3919 0 3899 1 0 1 1 0 8 0 amappl4 104 4347 0 4316 1 0 1 1 0 8 0 amappl3 96 1986 0 1971 1 0 1 1 0 8 0 amappl2 88 7368 0 7318 2 0 2 2 0 8 0 amappl1 80 100627 0 100213 13 3 10 12 0 8 0 amappl 88 69023 0 68850 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 64 148 0 18 3 0 3 3 0 8 0 uaddrrnd 24 6115 0 6052 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6115 0 6052 1 0 1 1 0 8 0 vmmpekpl 168 35441 0 35413 2 0 2 2 0 8 0 vmmpepl 168 546552 0 544574 408 313 95 126 0 357 2 vmsppl 272 6114 0 6052 6 1 5 5 0 8 0 rwobjpl 24 123740 0 122293 11 1 10 11 0 8 0 pdppl 4096 12236 0 12151 132 45 87 87 0 8 2 pvpl 32 2973425 0 2952748 524 323 201 238 0 265 28 pmappl 192 6114 0 6052 4 0 4 4 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 734 0 386 11 0 11 11 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(fffffd8077268400,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6688,ffff8000215f6694,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6688,ffff8000215f6694,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6688,ffff8000215f6694,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068bb6500) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068bb6500,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068bb6500) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f67c8) 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(fffffd8077268400,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8077268400,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6688,ffff8000215f6694,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6688,ffff8000215f6694,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6688,ffff8000215f6694,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068bb6500) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068bb6500,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068bb6500) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f67c8) 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