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 * 38912 56386 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6aa8,ffff8000215f6ab4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807116f400) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807116f400,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807116f400) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6be8) 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(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6aa8,ffff8000215f6ab4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807116f400) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807116f400,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807116f400) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6be8) 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 0xffff8000215f6630 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe540 r8 0xffffffff811a8b75 nd6_ns_input+0x395 r9 0x1 r10 0x950888be27822016 r11 0x73b3401eb68c8cfd r12 0 r13 0x802 r14 0 r15 0xffff800000bb2400 rip 0xffffffff811ab2c8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f65b0 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=38912 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe7e0,0xffff8000ffffe010 process=0xffff8000ffffc000 user=0xffff8000215f1000, vmspace=0xffffffff828c53d8 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70887 194273 31889 0 2 0 syz-executor.1 70887 347176 31889 0 2 0x4000000 syz-executor.1 78846 520506 43514 0 2 0 syz-executor.0 78846 303756 43514 0 3 0x4000080 ttyin syz-executor.0 78846 361074 43514 0 2 0x4000000 syz-executor.0 31889 273042 88148 0 3 0x82 nanoslp syz-executor.1 43514 234346 88148 0 3 0x82 nanoslp syz-executor.0 61790 109024 0 0 3 0x14200 acct acct 78460 38871 1 0 3 0x100083 ttyin getty 29313 511794 0 0 3 0x14280 nfsidl nfsio 52681 214053 0 0 3 0x14280 nfsidl nfsio 94338 407865 0 0 3 0x14280 nfsidl nfsio 84048 228601 0 0 3 0x14280 nfsidl nfsio 89067 436996 0 0 3 0x14280 nfsidl nfsio 57145 100978 0 0 3 0x14280 nfsidl nfsio 46489 289397 0 0 3 0x14280 nfsidl nfsio 59984 143690 0 0 3 0x14280 nfsidl nfsio 184 6570 0 0 3 0x14280 nfsidl nfsio 27902 236978 0 0 3 0x14280 nfsidl nfsio 55694 398963 0 0 3 0x14280 nfsidl nfsio 35386 397922 0 0 3 0x14280 nfsidl nfsio 54818 11199 0 0 3 0x14280 nfsidl nfsio 4353 163015 0 0 3 0x14280 nfsidl nfsio 42951 174152 0 0 3 0x14280 nfsidl nfsio 21910 523507 0 0 3 0x14280 nfsidl nfsio 26447 106604 0 0 3 0x14280 nfsidl nfsio 58531 415221 0 0 3 0x14280 nfsidl nfsio 67665 256274 0 0 3 0x14280 nfsidl nfsio 11482 225399 0 0 3 0x14280 nfsidl nfsio 36018 77708 0 0 3 0x14200 bored sosplice 88148 428382 63577 0 3 0x82 thrsleep syz-fuzzer 88148 477918 63577 0 3 0x4000082 thrsleep syz-fuzzer 88148 495933 63577 0 3 0x4000082 thrsleep syz-fuzzer 88148 145856 63577 0 3 0x4000082 kqread syz-fuzzer 88148 175557 63577 0 3 0x4000082 thrsleep syz-fuzzer 88148 507743 63577 0 3 0x4000082 thrsleep syz-fuzzer 88148 343617 63577 0 3 0x4000082 thrsleep syz-fuzzer 63577 197128 49507 0 3 0x10008a sigsusp ksh 49507 248392 13453 0 3 0x9a kqread sshd 13453 130401 1 0 3 0x88 kqread sshd 93260 181541 59495 73 3 0x100090 kqread syslogd 59495 309425 1 0 3 0x100082 netio syslogd 31713 101149 1 0 3 0x100080 kqread resolvd 36515 311516 98756 77 3 0x100092 kqread dhcpleased 46707 236422 98756 77 3 0x100092 kqread dhcpleased 98756 300523 1 0 3 0x80 kqread dhcpleased 66311 504829 0 0 3 0x14200 bored smr 14299 233233 0 0 2 0x14200 zerothread 86805 118470 0 0 3 0x14200 aiodoned aiodoned 39708 15192 0 0 3 0x14200 syncer update 47654 162255 0 0 3 0x14200 cleaner cleaner 61856 144318 0 0 3 0x14200 reaper reaper 76193 64316 0 0 3 0x14200 pgdaemon pagedaemon 16159 96296 0 0 3 0x14200 bored viomb 94200 453866 0 0 3 0x40014200 acpi0 acpi0 *56386 38912 0 0 7 0x14200 softnet 76685 399377 0 0 2 0x14200 systqmp 95741 23111 0 0 3 0x14200 bored systq 60352 1975 0 0 3 0x40014200 bored softclock 68245 441366 0 0 3 0x40014200 idle0 1 212056 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 6969K 6995K 78643K 13342 0 pcb 13 8K 8K 78643K 894 0 rtable 65 14K 15K 78643K 1974 0 ifaddr 51 15K 18K 78643K 892 0 sysctl 3 1K 1K 78643K 3 0 counters 21 16K 17K 78643K 167 0 ioctlops 0 0K 4K 78643K 1287 0 iov 1 16K 32K 78643K 5949 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1260 79K 80K 78643K 3496 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 83 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 105 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 7369 0 sigio 0 0K 0K 78643K 335 0 proc 67 55K 71K 78643K 1397 0 subproc 66 4K 4K 78643K 1058 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 552 0 in_multi 9 0K 2K 78643K 958 0 ether_multi 1 0K 0K 78643K 173 0 mrt 1 0K 0K 78643K 59 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 2K 78643K 1870 0 pfkey data 0 0K 0K 78643K 2 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 371 697K 701K 78643K 86881 0 UVM aobj 131 8K 8K 78643K 182 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 953 0 NDP 7 0K 0K 78643K 247 0 temp 86 4192K 6240K 78643K 154320 0 kqueue 14 19K 26K 78643K 581 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 120 439 0 436 1 0 1 1 0 8 0 rtentry 112 634 0 622 2 0 2 2 0 8 0 unpcb 128 3751 0 3738 1 0 1 1 0 8 0 syncache 296 64 0 64 20 20 0 1 0 8 0 tcpqe 32 11 28 11 6 6 0 1 0 8 0 tcpcb 736 2216 0 2210 40 38 2 3 0 8 1 arp 88 104 0 102 1 0 1 1 0 8 0 ipq 40 59 0 59 18 18 0 1 0 8 0 ipqe 40 1329 0 1329 18 18 0 1 0 8 0 inpcb 304 6141 0 6128 34 32 2 2 0 8 0 rttmr 72 16 0 16 8 8 0 1 0 8 0 nd6 48 138 0 138 4 4 0 1 0 8 0 pkpcb 40 72 0 72 23 23 0 1 0 8 0 kcovpl 48 32 0 30 1 0 1 1 0 8 0 ppxss 1152 29 0 29 16 16 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pfrktable 1344 64 0 57 2 1 1 1 0 8 0 pftag 88 16 0 14 2 1 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 4 0 2 1 0 1 1 0 8 0 pfstate 320 2 0 1 1 0 1 1 0 8 0 pfrule 1360 60 0 49 2 1 1 2 0 8 0 art_heap8 4096 11 0 9 10 8 2 3 0 8 0 art_heap4 256 2860 0 2799 33 25 8 13 0 8 4 art_table 32 2871 0 2808 2 0 2 2 0 8 0 art_node 16 630 0 619 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semupl 112 5 0 5 3 3 0 1 0 8 0 semapl 112 99 0 89 1 0 1 1 0 8 0 shmpl 112 179 0 51 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 12189 0 10775 90 1 89 89 0 8 0 ffsino 240 12189 0 10775 84 0 84 84 0 8 0 nchpl 144 23275 0 21681 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 74484 0 74484 15 14 1 1 0 8 1 vcpupl 1984 69 0 1 9 0 9 9 0 8 0 vmpool 528 118 0 50 5 0 5 5 0 8 0 pfiaddrpl 120 20 0 16 3 2 1 1 0 8 0 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 96580 0 96580 59 58 1 8 0 8 1 plimitpl 152 664 0 655 1 0 1 1 0 8 0 sigapl 424 7532 0 7480 6 0 6 6 0 8 0 futexpl 64 131293 0 131293 15 14 1 1 0 8 1 knotepl 112 56534 0 56491 2 0 2 2 0 8 0 kqueuepl 184 1700 0 1689 2 1 1 2 0 8 0 pipepl 304 1099 0 1089 29 28 1 2 0 8 0 fdescpl 432 7491 0 7474 3 0 3 3 0 8 0 filepl 120 47811 0 47662 20 15 5 6 0 8 0 lockfpl 104 1844 0 1841 1 0 1 1 0 8 0 lockfspl 48 601 0 598 1 0 1 1 0 8 0 sessionpl 144 52 0 42 1 0 1 1 0 8 0 pgrppl 48 84 0 74 1 0 1 1 0 8 0 ucredpl 96 6145 0 6135 1 0 1 1 0 8 0 zombiepl 144 7480 0 7480 3 2 1 1 0 8 1 processpl 1008 7532 0 7480 9 2 7 7 0 8 0 procpl 672 16008 0 15947 11 5 6 6 0 8 0 sosppl 168 105 0 105 35 35 0 1 0 8 0 sockpl 448 10420 0 10390 36 31 5 6 0 8 1 mcl64k 65536 310 0 310 46 45 1 1 0 8 1 mcl16k 16384 52 0 52 29 29 0 1 0 8 0 mcl12k 12288 255 0 255 38 37 1 1 0 8 1 mcl9k 9216 132 0 128 8 7 1 1 0 8 0 mcl8k 8192 329 0 323 10 9 1 2 0 8 0 mcl4k 4096 579 0 579 34 33 1 1 0 8 1 mcl2k2 2112 53 0 53 31 31 0 1 0 8 0 mcl2k 2048 86324 0 86095 39 9 30 31 0 8 0 mtagpl 96 70 0 70 2 2 0 1 0 8 0 mbufpl 256 187125 0 186577 216 179 37 52 0 8 0 bufpl 280 26339 0 19940 458 0 458 458 0 8 0 anonpl 24 2156545 0 2138825 474 356 118 153 0 188 0 amapchunkpl 152 221789 0 221140 257 231 26 39 0 158 0 amappl16 200 25154 0 24443 356 315 41 62 0 8 3 amappl15 192 1341 0 1335 1 0 1 1 0 8 0 amappl14 184 709 0 704 1 0 1 1 0 8 0 amappl13 176 1212 0 1210 1 0 1 1 0 8 0 amappl12 168 627 0 625 1 0 1 1 0 8 0 amappl11 160 94 0 81 1 0 1 1 0 8 0 amappl10 152 1316 0 1315 2 1 1 1 0 8 0 amappl9 144 1049 0 1047 1 0 1 1 0 8 0 amappl8 136 2519 0 2451 4 1 3 3 0 8 0 amappl7 128 1665 0 1658 1 0 1 1 0 8 0 amappl6 120 988 0 972 1 0 1 1 0 8 0 amappl5 112 8184 0 8162 1 0 1 1 0 8 0 amappl4 104 1472 0 1449 1 0 1 1 0 8 0 amappl3 96 1285 0 1269 1 0 1 1 0 8 0 amappl2 88 9040 0 8985 2 0 2 2 0 8 0 amappl1 80 122236 0 121807 13 3 10 12 0 8 0 amappl 88 85865 0 85661 6 1 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 64 181 0 51 3 0 3 3 0 8 0 uaddrrnd 24 7609 0 7524 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7609 0 7524 1 0 1 1 0 8 0 vmmpekpl 168 42953 0 42920 2 0 2 2 0 8 0 vmmpepl 168 681492 0 679375 522 417 105 125 0 357 8 vmsppl 272 7608 0 7524 7 1 6 6 0 8 0 rwobjpl 24 155652 0 154140 17 6 11 12 0 8 0 pdppl 4096 15224 0 15116 171 63 108 109 0 8 0 pvpl 32 3849938 0 3829761 739 562 177 240 0 265 0 pmappl 192 7608 0 7524 7 2 5 5 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 868 0 488 15 3 12 12 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(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6aa8,ffff8000215f6ab4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807116f400) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807116f400,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807116f400) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6be8) 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(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806282dd00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6aa8,ffff8000215f6ab4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6aa8,ffff8000215f6ab4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd807116f400) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd807116f400,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd807116f400) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6be8) 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