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 *153471 71460 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f67d8,ffff8000215f67e4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f67d8,ffff8000215f67e4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f67d8,ffff8000215f67e4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068d4ec00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068d4ec00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068d4ec00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6918) 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(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f67d8,ffff8000215f67e4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f67d8,ffff8000215f67e4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f67d8,ffff8000215f67e4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068d4ec00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068d4ec00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068d4ec00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6918) 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 0xffff8000215f6360 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe2a0 r8 0xffffffff811a8b75 nd6_ns_input+0x395 r9 0x1 r10 0x87704484b3e57a3b r11 0x3d6ef66220a48700 r12 0 r13 0x802 r14 0 r15 0xffff800000d63700 rip 0xffffffff811ab2c8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f62e0 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=153471 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe000,0xffff8000ffffe7f0 process=0xffff8000ffffc000 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 86874 466597 76032 0 2 0 syz-executor.0 86874 322061 76032 0 2 0x4000000 syz-executor.0 50358 513788 81963 0 3 0x80 nanoslp syz-executor.1 50358 68440 81963 0 3 0x4000080 bell syz-executor.1 50358 22064 81963 0 3 0x4000080 rest syz-executor.1 50358 196763 81963 0 3 0x4000080 fsleep syz-executor.1 76032 473077 59104 0 3 0x82 nanoslp syz-executor.0 81963 33908 59104 0 3 0x82 nanoslp syz-executor.1 32004 55469 1 0 3 0x100083 ttyin getty 28197 335641 0 0 3 0x14200 acct acct 15311 490066 0 0 3 0x14280 nfsidl nfsio 33239 487842 0 0 3 0x14280 nfsidl nfsio 81329 509043 0 0 3 0x14280 nfsidl nfsio 12678 202934 0 0 3 0x14280 nfsidl nfsio 10592 440192 0 0 3 0x14280 nfsidl nfsio 37729 9525 0 0 3 0x14280 nfsidl nfsio 3442 345711 0 0 3 0x14280 nfsidl nfsio 65154 331605 0 0 3 0x14280 nfsidl nfsio 61060 296634 0 0 3 0x14280 nfsidl nfsio 69424 205108 0 0 3 0x14280 nfsidl nfsio 12404 43460 0 0 3 0x14280 nfsidl nfsio 23106 304697 0 0 3 0x14280 nfsidl nfsio 84690 401490 0 0 3 0x14280 nfsidl nfsio 93707 31798 0 0 3 0x14280 nfsidl nfsio 82501 259212 0 0 3 0x14280 nfsidl nfsio 47927 371782 0 0 3 0x14280 nfsidl nfsio 47011 80434 0 0 3 0x14280 nfsidl nfsio 67982 465902 0 0 3 0x14280 nfsidl nfsio 53512 515447 0 0 3 0x14280 nfsidl nfsio 70359 291577 0 0 3 0x14280 nfsidl nfsio 65626 407242 0 0 3 0x14200 bored sosplice 59104 202075 87789 0 3 0x82 kqread syz-fuzzer 59104 471652 87789 0 3 0x4000082 thrsleep syz-fuzzer 59104 109447 87789 0 3 0x4000082 thrsleep syz-fuzzer 59104 201780 87789 0 3 0x4000082 thrsleep syz-fuzzer 59104 157072 87789 0 3 0x4000082 thrsleep syz-fuzzer 59104 441637 87789 0 3 0x4000082 thrsleep syz-fuzzer 59104 402955 87789 0 3 0x4000082 thrsleep syz-fuzzer 87789 123776 85677 0 3 0x10008a sigsusp ksh 85677 300319 27301 0 3 0x9a kqread sshd 27301 400559 1 0 3 0x88 kqread sshd 56281 382525 53011 73 3 0x100090 kqread syslogd 53011 327493 1 0 3 0x100082 netio syslogd 71380 478256 1 0 3 0x100080 kqread resolvd 36386 75292 49348 77 3 0x100092 kqread dhcpleased 64122 300448 49348 77 3 0x100092 kqread dhcpleased 49348 270442 1 0 3 0x80 kqread dhcpleased 92582 16744 0 0 3 0x14200 bored smr 78819 218049 0 0 2 0x14200 zerothread 89265 216115 0 0 3 0x14200 aiodoned aiodoned 74258 55754 0 0 3 0x14200 syncer update 23944 91278 0 0 3 0x14200 cleaner cleaner 23203 163063 0 0 3 0x14200 reaper reaper 13943 213572 0 0 3 0x14200 pgdaemon pagedaemon 36974 493724 0 0 3 0x14200 bored viomb 67613 17140 0 0 3 0x40014200 acpi0 acpi0 *71460 153471 0 0 7 0x14200 softnet 32612 504398 0 0 2 0x14200 systqmp 70291 390361 0 0 3 0x14200 bored systq 52900 170500 0 0 3 0x40014200 bored softclock 53866 415000 0 0 3 0x40014200 idle0 1 485634 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 10125 6383K 7601K 78643K 24634 0 pcb 13 8K 8K 78643K 1426 0 rtable 196 36K 37K 78643K 6512 0 ifaddr 97 27K 27K 78643K 1399 0 sysctl 3 1K 1K 78643K 9 0 counters 21 16K 17K 78643K 175 0 ioctlops 0 0K 4K 78643K 6240 0 iov 0 0K 32K 78643K 926 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1259 79K 80K 78643K 7053 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 213 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 15407 0 sigio 0 0K 0K 78643K 125 0 proc 64 55K 71K 78643K 3982 0 subproc 66 4K 4K 78643K 1095 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 609 0 in_multi 30 2K 2K 78643K 3061 0 ether_multi 1 0K 0K 78643K 299 0 mrt 1 0K 0K 78643K 399 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 2024 0 pfkey data 0 0K 1K 78643K 8 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 390 693K 709K 78643K 183586 0 UVM aobj 131 4K 4K 78643K 168 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 875 0 NDP 8 0K 0K 78643K 594 0 temp 115 4250K 6290K 78643K 116256 0 kqueue 12 18K 36K 78643K 971 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 1562 0 1559 1 0 1 1 0 8 0 rtentry 112 2179 0 2147 2 0 2 2 0 8 0 unpcb 128 5739 0 5726 1 0 1 1 0 8 0 syncache 296 55 0 55 25 25 0 1 0 8 0 tcpqe 32 10 0 10 9 9 0 1 0 8 0 tcpcb 736 2830 0 2826 41 40 1 5 0 8 0 arp 88 106 0 100 1 0 1 1 0 8 0 ipq 40 79 0 79 27 27 0 1 0 8 0 ipqe 40 1690 0 1690 27 27 0 1 0 8 0 inpcb 304 8140 0 8129 59 57 2 2 0 8 1 rttmr 72 119 0 119 8 8 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 481 0 477 7 6 1 1 0 8 0 pkpcb 40 58 0 58 20 20 0 1 0 8 0 kcovpl 48 33 0 31 1 0 1 1 0 8 0 ppxss 1152 30 0 30 21 21 0 1 0 8 0 pfstscr 40 38 0 38 12 11 1 1 0 8 1 pfosfp 40 20 0 15 1 0 1 1 0 8 0 pfosfpen 112 20 0 11 1 0 1 1 0 8 0 pfrktable 1344 675 0 626 21 16 5 5 0 8 0 pftag 88 63 0 51 2 1 1 1 0 8 0 pfqueue 264 8 0 8 3 3 0 1 0 8 0 pfstitem 24 20 0 20 9 9 0 1 0 8 0 pfstkey 112 48 0 48 13 12 1 1 0 8 1 pfstate 320 25 0 25 13 12 1 1 0 8 1 pfrule 1360 3966 0 2939 90 4 86 86 0 8 0 art_heap8 4096 24 0 23 19 18 1 4 0 8 0 art_heap4 256 11308 0 11144 59 48 11 13 0 8 0 art_table 32 11332 0 11167 2 0 2 2 0 8 0 art_node 16 2168 0 2140 1 0 1 1 0 8 0 sysvmsgpl 40 31 0 22 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 165 0 37 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 20397 0 18986 90 1 89 89 0 8 0 ffsino 240 20397 0 18986 84 0 84 84 0 8 0 nchpl 144 42477 0 40885 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 129872 0 129872 14 13 1 1 0 8 1 vcpupl 1984 69 0 2 9 0 9 9 0 8 0 vmpool 528 116 0 49 5 0 5 5 0 8 0 pfiaddrpl 120 470 0 231 10 2 8 8 0 8 0 scsiplug 72 9 0 9 8 8 0 1 0 8 0 scxspl 216 135560 0 135560 59 55 4 8 0 8 4 plimitpl 152 619 0 611 1 0 1 1 0 8 0 sigapl 424 15568 0 15516 6 0 6 6 0 8 0 futexpl 64 227188 0 227187 15 14 1 1 0 8 0 knotepl 112 113094 0 113051 3 1 2 3 0 8 0 kqueuepl 184 2921 0 2907 4 3 1 2 0 8 0 pipepl 304 1480 0 1470 46 45 1 2 0 8 0 fdescpl 432 15524 0 15507 3 0 3 3 0 8 0 filepl 120 81353 0 81206 17 12 5 6 0 8 0 lockfpl 104 2295 0 2292 1 0 1 1 0 8 0 lockfspl 48 818 0 815 1 0 1 1 0 8 0 sessionpl 144 51 0 41 1 0 1 1 0 8 0 pgrppl 48 87 0 77 1 0 1 1 0 8 0 ucredpl 96 5956 0 5945 1 0 1 1 0 8 0 zombiepl 144 15516 0 15516 10 9 1 1 0 8 1 processpl 1008 15568 0 15516 11 4 7 7 0 8 0 procpl 672 33954 0 33892 8 2 6 6 0 8 0 sosppl 168 116 0 116 33 33 0 1 0 8 0 sockpl 448 15514 0 15487 46 42 4 5 0 8 1 mcl64k 65536 343 0 343 63 62 1 1 0 8 1 mcl16k 16384 104 0 104 52 52 0 1 0 8 0 mcl12k 12288 357 0 357 54 53 1 1 0 8 1 mcl9k 9216 125 0 125 51 50 1 1 0 8 1 mcl8k 8192 517 0 517 55 55 0 1 0 8 0 mcl4k 4096 1144 0 1144 36 35 1 1 0 8 1 mcl2k2 2112 80 0 80 48 48 0 1 0 8 0 mcl2k 2048 98400 0 98360 41 34 7 15 0 8 1 mtagpl 96 958 0 951 15 14 1 6 0 8 0 mbufpl 256 251241 0 251032 351 335 16 60 0 8 0 bufpl 280 30265 0 23866 458 0 458 458 0 8 0 anonpl 24 4240446 0 4222034 484 368 116 140 0 188 0 amapchunkpl 152 447602 0 446953 291 265 26 45 0 158 0 amappl16 200 44381 0 43664 407 367 40 53 0 8 2 amappl15 192 2651 0 2644 1 0 1 1 0 8 0 amappl14 184 899 0 895 1 0 1 1 0 8 0 amappl13 176 758 0 757 1 0 1 1 0 8 0 amappl12 168 2226 0 2221 1 0 1 1 0 8 0 amappl11 160 2843 0 2827 1 0 1 1 0 8 0 amappl10 152 1970 0 1968 1 0 1 1 0 8 0 amappl9 144 2287 0 2284 1 0 1 1 0 8 0 amappl8 136 3634 0 3562 4 1 3 3 0 8 0 amappl7 128 2758 0 2749 1 0 1 1 0 8 0 amappl6 120 2257 0 2247 1 0 1 1 0 8 0 amappl5 112 14972 0 14954 1 0 1 1 0 8 0 amappl4 104 5539 0 5508 1 0 1 1 0 8 0 amappl3 96 3473 0 3457 1 0 1 1 0 8 0 amappl2 88 16813 0 16751 2 0 2 2 0 8 0 amappl1 80 245711 0 245280 17 7 10 12 0 8 0 amappl 88 181703 0 181486 6 1 5 6 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 64 167 0 37 3 0 3 3 0 8 0 uaddrrnd 24 15640 0 15556 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15640 0 15556 1 0 1 1 0 8 0 vmmpekpl 168 79334 0 79291 3 0 3 3 0 8 0 vmmpepl 168 1370383 0 1368232 895 795 100 130 0 357 4 vmsppl 272 15639 0 15556 6 0 6 6 0 8 0 rwobjpl 24 305130 0 303588 55 45 10 11 0 8 0 pdppl 4096 31286 0 31179 192 85 107 109 0 8 0 pvpl 32 7306849 0 7285186 683 499 184 230 0 265 0 pmappl 192 15639 0 15556 7 2 5 5 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 1245 0 826 13 0 13 13 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(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f67d8,ffff8000215f67e4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f67d8,ffff8000215f67e4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f67d8,ffff8000215f67e4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068d4ec00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068d4ec00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068d4ec00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6918) 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(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806c7cf800,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f67d8,ffff8000215f67e4,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f67d8,ffff8000215f67e4,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f67d8,ffff8000215f67e4,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd8068d4ec00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd8068d4ec00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd8068d4ec00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6918) 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