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 *357673 36028 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6438,ffff8000215f6444,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6438,ffff8000215f6444,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6438,ffff8000215f6444,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806c48d800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806c48d800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806c48d800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6578) 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(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6438,ffff8000215f6444,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6438,ffff8000215f6444,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6438,ffff8000215f6444,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806c48d800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806c48d800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806c48d800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6578) 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 0xffff8000215f5fc0 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe2a0 r8 0xffffffff811a8b75 nd6_ns_input+0x395 r9 0x1 r10 0xbc7e1b6201fd44d0 r11 0xec4b25c56195e643 r12 0 r13 0x802 r14 0 r15 0xffff800000bb6f00 rip 0xffffffff811ab2c8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f5f40 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=357673 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe7e0,0xffff8000ffffe010 process=0xffff8000ffffc7e0 user=0xffff8000215f1000, vmspace=0xffffffff828c53d8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93476 457732 46042 0 2 0 syz-executor.1 93476 110294 46042 0 2 0x4000000 syz-executor.1 46042 281904 8441 0 3 0x82 nanoslp syz-executor.1 68821 413921 8441 0 2 0x2 syz-executor.0 20751 228485 0 0 3 0x14200 acct acct 22716 324955 1 0 3 0x100083 ttyin getty 7154 238019 0 0 3 0x14280 nfsidl nfsio 2979 14189 0 0 3 0x14280 nfsidl nfsio 45266 347431 0 0 3 0x14280 nfsidl nfsio 93339 415935 0 0 3 0x14280 nfsidl nfsio 48282 157410 0 0 3 0x14280 nfsidl nfsio 70422 139004 0 0 3 0x14280 nfsidl nfsio 97482 345025 0 0 3 0x14280 nfsidl nfsio 87038 326215 0 0 3 0x14280 nfsidl nfsio 1705 492448 0 0 3 0x14280 nfsidl nfsio 74726 237343 0 0 3 0x14280 nfsidl nfsio 1588 104101 0 0 3 0x14280 nfsidl nfsio 91296 12423 0 0 3 0x14280 nfsidl nfsio 10709 338988 0 0 3 0x14280 nfsidl nfsio 89069 377733 0 0 3 0x14280 nfsidl nfsio 63807 364520 0 0 3 0x14280 nfsidl nfsio 59288 156100 0 0 3 0x14280 nfsidl nfsio 50690 151222 0 0 3 0x14280 nfsidl nfsio 27952 132576 0 0 3 0x14280 nfsidl nfsio 9603 133883 0 0 3 0x14280 nfsidl nfsio 44536 92583 0 0 3 0x14280 nfsidl nfsio 84446 487254 0 0 3 0x14200 bored sosplice 8441 420224 83845 0 3 0x82 thrsleep syz-fuzzer 8441 467410 83845 0 3 0x4000082 nanoslp syz-fuzzer 8441 168953 83845 0 3 0x4000082 thrsleep syz-fuzzer 8441 461195 83845 0 3 0x4000082 thrsleep syz-fuzzer 8441 249478 83845 0 3 0x4000082 thrsleep syz-fuzzer 8441 356444 83845 0 3 0x4000082 kqread syz-fuzzer 8441 76897 83845 0 3 0x4000082 thrsleep syz-fuzzer 83845 189584 90386 0 3 0x10008a sigsusp ksh 90386 138682 43403 0 3 0x9a kqread sshd 43403 337903 1 0 3 0x88 kqread sshd 98341 401920 88911 73 3 0x100090 kqread syslogd 88911 408730 1 0 3 0x100082 netio syslogd 30585 236295 1 0 3 0x100080 kqread resolvd 42535 506250 8077 77 3 0x100092 kqread dhcpleased 75930 261894 8077 77 3 0x100092 kqread dhcpleased 8077 405841 1 0 3 0x80 kqread dhcpleased 20448 21207 0 0 3 0x14200 bored smr 25275 92927 0 0 2 0x14200 zerothread 63057 72361 0 0 3 0x14200 aiodoned aiodoned 48854 169329 0 0 3 0x14200 syncer update 32978 233126 0 0 3 0x14200 cleaner cleaner 65730 30327 0 0 3 0x14200 reaper reaper 31913 295854 0 0 3 0x14200 pgdaemon pagedaemon 93108 441293 0 0 3 0x14200 bored viomb 51425 401106 0 0 3 0x40014200 acpi0 acpi0 *36028 357673 0 0 7 0x14200 softnet 68218 21419 0 0 2 0x14200 systqmp 70797 110471 0 0 3 0x14200 bored systq 47394 174599 0 0 3 0x40014200 bored softclock 73399 105325 0 0 3 0x40014200 idle0 1 8037 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 10121 6377K 10900K 78643K 20343 0 pcb 13 8K 8K 78643K 804 0 rtable 169 27K 30K 78643K 3569 0 ifaddr 73 21K 21K 78643K 1176 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 17K 78643K 164 0 ioctlops 0 0K 4K 78643K 1187 0 iov 0 0K 32K 78643K 591 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1251 79K 79K 78643K 5499 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 61 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 430 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 7818 0 sigio 0 0K 0K 78643K 98 0 proc 64 55K 71K 78643K 1629 0 subproc 66 4K 4K 78643K 1355 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1748 0 in_multi 30 2K 2K 78643K 1078 0 ether_multi 1 0K 0K 78643K 178 0 mrt 1 0K 0K 78643K 20 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 97 440K 440K 78643K 97 0 exec 0 0K 2K 78643K 1969 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 303 419K 419K 78643K 90833 0 UVM aobj 131 9K 9K 78643K 142 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 1196 0 NDP 7 0K 0K 78643K 258 0 temp 111 4242K 6274K 78643K 177366 0 kqueue 13 20K 38K 78643K 517 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 120 447 0 444 1 0 1 1 0 8 0 rtentry 112 725 0 688 2 0 2 2 0 8 0 unpcb 128 3966 0 3953 1 0 1 1 0 8 0 syncache 296 225 0 225 16 16 0 1 0 8 0 tcpqe 32 84 17 84 5 5 0 1 0 8 0 tcpcb 736 6195 0 6181 46 43 3 11 0 8 0 arp 88 124 0 118 1 0 1 1 0 8 0 ipq 40 56 0 55 13 12 1 1 0 8 0 ipqe 40 943 0 942 13 12 1 1 0 8 0 inpcb 304 13527 0 13512 14 12 2 3 0 8 0 rttmr 72 5 0 5 4 4 0 1 0 8 0 ip6q 72 2 0 2 2 2 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 160 0 154 1 0 1 1 0 8 0 pkpcb 40 62 0 62 16 16 0 1 0 8 0 kcovpl 48 41 0 39 1 0 1 1 0 8 0 ppxss 1152 26 0 26 14 14 0 1 0 8 0 pfstscr 40 48 0 48 9 8 1 1 0 8 1 pffrag 232 12 0 12 3 3 0 1 0 482 0 pffrnode 88 12 0 12 3 3 0 1 0 8 0 pffrent 40 282 0 282 3 3 0 1 0 8 0 pfosfp 40 6 0 6 1 1 0 1 0 8 0 pfosfpen 112 6 0 6 1 1 0 1 0 8 0 pfrktable 1344 733 0 703 10 7 3 4 0 8 0 pftag 88 60 0 47 1 0 1 1 0 8 0 pfqueue 264 12 0 4 1 0 1 1 0 8 0 pfstitem 24 21 0 21 7 6 1 1 0 8 1 pfstkey 112 54 0 54 9 8 1 1 0 8 1 pfstate 320 29 0 29 9 8 1 1 0 8 1 pfrule 1360 549 0 401 20 7 13 13 0 8 0 art_heap8 4096 9 0 8 7 5 2 3 0 8 1 art_heap4 256 3083 0 2934 36 26 10 13 0 8 0 art_table 32 3092 0 2942 2 0 2 2 0 8 0 art_node 16 719 0 688 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 424 0 414 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10980 0 9569 90 1 89 89 0 8 0 ffsino 240 10980 0 9569 86 2 84 84 0 8 0 nchpl 144 20901 0 19310 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 67278 0 67277 19 18 1 1 0 8 0 vcpupl 1984 40 0 0 5 0 5 5 0 8 0 vmpool 528 84 0 44 6 3 3 3 0 8 0 pfiaddrpl 120 272 0 212 4 2 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 83446 0 83446 39 38 1 8 0 8 1 plimitpl 152 589 0 581 1 0 1 1 0 8 0 sigapl 424 7960 0 7909 6 0 6 6 0 8 0 futexpl 64 135592 0 135592 18 17 1 1 0 8 1 knotepl 112 57866 0 57823 2 0 2 2 0 8 0 kqueuepl 184 1585 0 1574 3 2 1 2 0 8 0 pipepl 304 1047 0 1037 24 22 2 2 0 8 1 fdescpl 432 7915 0 7899 3 0 3 3 0 8 0 filepl 120 49630 0 49484 12 7 5 6 0 8 0 lockfpl 104 1681 0 1678 1 0 1 1 0 8 0 lockfspl 48 594 0 591 1 0 1 1 0 8 0 sessionpl 144 63 0 53 1 0 1 1 0 8 0 pgrppl 48 73 0 63 1 0 1 1 0 8 0 ucredpl 96 6546 0 6535 1 0 1 1 0 8 0 zombiepl 144 7909 0 7909 4 3 1 1 0 8 1 processpl 1008 7960 0 7909 10 3 7 7 0 8 0 procpl 672 16558 0 16500 14 8 6 6 0 8 0 sosppl 168 86 0 85 17 16 1 1 0 8 0 sockpl 448 18031 0 18000 38 33 5 6 0 8 1 mcl64k 65536 222 0 222 35 34 1 1 0 8 1 mcl16k 16384 62 0 62 30 30 0 1 0 8 0 mcl12k 12288 218 0 218 36 35 1 1 0 8 1 mcl9k 9216 101 0 101 36 35 1 1 0 8 1 mcl8k 8192 312 0 310 24 23 1 1 0 8 0 mcl4k 4096 551 0 551 28 27 1 1 0 8 1 mcl2k2 2112 48 0 48 29 28 1 1 0 8 1 mcl2k 2048 86225 0 86148 20 9 11 12 0 8 0 mtagpl 96 729 0 729 5 5 0 2 0 8 0 mbufpl 256 195585 0 195330 143 116 27 32 0 8 9 bufpl 280 23641 0 17242 458 0 458 458 0 8 0 anonpl 24 2212059 0 2197372 424 316 108 136 0 188 0 amapchunkpl 152 226249 0 225680 213 188 25 38 0 158 0 amappl16 200 23662 0 23014 279 244 35 47 0 8 0 amappl15 192 2060 0 2053 1 0 1 1 0 8 0 amappl14 184 842 0 839 1 0 1 1 0 8 0 amappl13 176 1615 0 1612 1 0 1 1 0 8 0 amappl12 168 864 0 862 1 0 1 1 0 8 0 amappl11 160 548 0 534 1 0 1 1 0 8 0 amappl10 152 1031 0 1030 1 0 1 1 0 8 0 amappl9 144 1074 0 1072 1 0 1 1 0 8 0 amappl8 136 1795 0 1735 4 1 3 3 0 8 0 amappl7 128 858 0 848 1 0 1 1 0 8 0 amappl6 120 1048 0 1039 1 0 1 1 0 8 0 amappl5 112 7365 0 7347 1 0 1 1 0 8 0 amappl4 104 2762 0 2734 1 0 1 1 0 8 0 amappl3 96 1793 0 1778 1 0 1 1 0 8 0 amappl2 88 9623 0 9568 2 0 2 2 0 8 0 amappl1 80 129893 0 129485 13 4 9 12 0 8 0 amappl 88 89789 0 89612 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 64 141 0 11 3 0 3 3 0 8 0 uaddrrnd 24 7999 0 7943 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7999 0 7943 1 0 1 1 0 8 0 vmmpekpl 168 43612 0 43578 2 0 2 2 0 8 0 vmmpepl 168 719787 0 717877 497 381 116 119 0 357 25 vmsppl 272 7998 0 7943 5 1 4 4 0 8 0 rwobjpl 24 162200 0 160801 24 14 10 10 0 8 0 pdppl 4096 16004 0 15926 149 69 80 80 0 8 2 pvpl 32 3942410 0 3924447 695 524 171 241 0 265 0 pmappl 192 7998 0 7943 5 2 3 3 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 782 0 446 10 0 10 10 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(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6438,ffff8000215f6444,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6438,ffff8000215f6444,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6438,ffff8000215f6444,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806c48d800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806c48d800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806c48d800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6578) 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(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80687f9500,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6438,ffff8000215f6444,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6438,ffff8000215f6444,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6438,ffff8000215f6444,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806c48d800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806c48d800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806c48d800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6578) 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