uvm_fault(0xffffffff82916cb8, 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 * 12832 1079 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6628,ffff8000215f6634,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6628,ffff8000215f6634,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6628,ffff8000215f6634,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806a1fcd00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806a1fcd00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806a1fcd00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6768) 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(0xffffffff82916cb8, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6628,ffff8000215f6634,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6628,ffff8000215f6634,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6628,ffff8000215f6634,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806a1fcd00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806a1fcd00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806a1fcd00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6768) 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 0xffff8000215f61b0 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe000 r8 0xffffffff82397b05 nd6_ns_input+0x395 r9 0x1 r10 0xf77d0d5aa23e78ff r11 0x6f0494d5de53f9d r12 0 r13 0x40000002 r14 0 r15 0xffff800000c35d00 rip 0xffffffff8239a258 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f6130 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=12832 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe2a0,0xffff8000ffffe550 process=0xffff8000ffffc7d0 user=0xffff8000215f1000, vmspace=0xffffffff82916cb8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 71847 443559 49677 0 2 0 syz-executor.0 71847 359184 49677 0 2 0x4000000 syz-executor.0 12189 294079 0 0 3 0x14200 acct acct 49677 512884 11183 0 2 0x482 syz-executor.0 64115 30942 1 0 3 0x100083 ttyin getty 60326 257330 0 0 3 0x14200 bored sosplice 78065 436267 0 0 3 0x14280 nfsidl nfsio 67817 345869 0 0 3 0x14280 nfsidl nfsio 96951 313104 0 0 3 0x14280 nfsidl nfsio 44155 404179 0 0 3 0x14280 nfsidl nfsio 16765 19568 0 0 3 0x14280 nfsidl nfsio 82009 422833 0 0 3 0x14280 nfsidl nfsio 24303 33898 0 0 3 0x14280 nfsidl nfsio 79109 520116 0 0 3 0x14280 nfsidl nfsio 39985 355409 0 0 3 0x14280 nfsidl nfsio 67951 351821 0 0 3 0x14280 nfsidl nfsio 81203 297595 0 0 3 0x14280 nfsidl nfsio 23613 228160 0 0 3 0x14280 nfsidl nfsio 75739 440497 0 0 3 0x14280 nfsidl nfsio 15076 35974 0 0 3 0x14280 nfsidl nfsio 51399 277895 0 0 3 0x14280 nfsidl nfsio 10925 24365 0 0 3 0x14280 nfsidl nfsio 31307 222008 0 0 3 0x14280 nfsidl nfsio 89192 137143 0 0 3 0x14280 nfsidl nfsio 75173 186923 0 0 3 0x14280 nfsidl nfsio 8075 272580 0 0 3 0x14280 nfsidl nfsio 11183 512282 30446 0 3 0x82 thrsleep syz-fuzzer 11183 501829 30446 0 2 0x4000482 syz-fuzzer 11183 343957 30446 0 3 0x4000082 kqread syz-fuzzer 11183 236135 30446 0 3 0x4000082 thrsleep syz-fuzzer 11183 63600 30446 0 3 0x4000082 thrsleep syz-fuzzer 11183 243826 30446 0 3 0x4000082 thrsleep syz-fuzzer 11183 230428 30446 0 3 0x4000082 thrsleep syz-fuzzer 30446 285254 24297 0 3 0x10008a sigsusp ksh 24297 436725 32881 0 3 0x9a kqread sshd 32881 164818 1 0 3 0x88 kqread sshd 58057 196549 87792 73 3 0x100090 kqread syslogd 87792 240273 1 0 3 0x100082 netio syslogd 11295 359016 1 0 3 0x100080 kqread resolvd 4924 285053 80852 77 3 0x100092 kqread dhcpleased 93671 135258 80852 77 3 0x100092 kqread dhcpleased 80852 515050 1 0 3 0x80 kqread dhcpleased 32138 396445 0 0 3 0x14200 bored smr 79121 94901 0 0 2 0x14200 zerothread 65094 265520 0 0 3 0x14200 aiodoned aiodoned 5737 232595 0 0 3 0x14200 syncer update 71546 310221 0 0 3 0x14200 cleaner cleaner 88066 99412 0 0 3 0x14200 reaper reaper 15014 67713 0 0 3 0x14200 pgdaemon pagedaemon 23668 308504 0 0 3 0x14200 bored viomb 3653 209451 0 0 3 0x40014200 acpi0 acpi0 * 1079 12832 0 0 7 0x14200 softnet 76639 15107 0 0 2 0x14200 systqmp 79392 166117 0 0 3 0x14200 bored systq 31132 55360 0 0 3 0x40014200 bored softclock 93266 449592 0 0 3 0x40014200 idle0 1 96261 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 10112 6360K 7123K 78643K 18457 0 pcb 13 8K 8K 78643K 2539 0 rtable 156 20K 21K 78643K 6453 0 ifaddr 112 30K 32K 78643K 2317 0 sysctl 2 0K 0K 78643K 2 0 counters 20 16K 17K 78643K 94 0 ioctlops 0 0K 4K 78643K 9164 0 iov 0 0K 16K 78643K 280 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1250 79K 79K 78643K 3845 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 55 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 77 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 4 9K 25K 78643K 10378 0 sigio 0 0K 0K 78643K 42 0 proc 60 55K 71K 78643K 923 0 subproc 33 2K 4K 78643K 693 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3003 0 in_multi 23 1K 2K 78643K 1012 0 ether_multi 1 0K 0K 78643K 305 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 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 1130 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 251 244K 267K 78643K 121287 0 UVM aobj 131 6K 6K 78643K 145 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 984 0 NDP 6 0K 0K 78643K 136 0 temp 110 4263K 6312K 78643K 78918 0 kqueue 14 19K 27K 78643K 240 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 120 201 0 198 1 0 1 1 0 8 0 rtentry 112 380 0 350 3 1 2 2 0 8 0 unpcb 128 3448 0 3435 2 1 1 2 0 8 0 syncache 296 32 0 32 11 11 0 1 0 8 0 tcpqe 32 49 0 49 7 7 0 1 0 8 0 tcpcb 736 7114 0 7094 81 78 3 7 0 8 1 arp 88 61 0 54 1 0 1 1 0 8 0 ipq 40 1214 0 1211 12 11 1 1 0 8 0 ipqe 40 5258 0 5255 12 11 1 1 0 8 0 inpcb 304 15515 0 15503 19 17 2 2 0 8 1 rttmr 72 4 0 4 3 3 0 1 0 8 0 nd6 48 82 0 78 3 2 1 1 0 8 0 pkpcb 40 19 0 19 8 8 0 1 0 8 0 kcovpl 48 21 0 20 1 0 1 1 0 8 0 ppxss 1152 17 0 17 11 10 1 1 0 8 1 pfstscr 40 304 0 304 1 1 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 4 0 4 1 1 0 1 0 8 0 pfosfp 40 16 0 15 1 0 1 1 0 8 0 pfosfpen 112 16 0 15 1 0 1 1 0 8 0 pfrktable 1344 2673 0 2641 5 2 3 4 0 8 0 pftag 88 90 0 78 2 1 1 1 0 8 0 pfqueue 264 16 0 6 2 1 1 1 0 8 0 pfstitem 24 6 0 6 2 2 0 1 0 8 0 pfstkey 112 594 0 594 2 2 0 1 0 8 0 pfstate 320 298 0 298 2 2 0 1 0 8 0 pfrule 1360 7305 0 5282 170 1 169 169 0 8 0 art_heap8 4096 5 0 4 4 3 1 3 0 8 0 art_heap4 256 1809 0 1627 38 24 14 15 0 8 1 art_table 32 1814 0 1631 2 0 2 2 0 8 0 art_node 16 377 0 349 1 0 1 1 0 8 0 semapl 112 75 0 66 1 0 1 1 0 8 0 shmpl 112 142 0 14 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 12489 0 11082 89 0 89 89 0 8 0 ffsino 240 12489 0 11082 84 0 84 84 0 8 0 nchpl 144 27105 0 26671 60 40 20 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 75869 0 75869 12 11 1 1 0 8 1 vcpupl 1984 23 0 0 3 0 3 3 0 8 0 vmpool 528 41 0 18 3 1 2 2 0 8 0 pfiaddrpl 120 3079 0 3034 6 4 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 96204 0 96204 25 24 1 8 0 8 1 plimitpl 152 286 0 279 1 0 1 1 0 8 0 sigapl 424 10578 0 10528 6 0 6 6 0 8 0 futexpl 64 168677 0 168677 9 8 1 1 0 8 1 knotepl 112 82535 0 82498 2 0 2 2 0 8 0 kqueuepl 184 860 0 842 7 5 2 2 0 8 1 pipepl 304 675 0 668 14 13 1 2 0 8 0 fdescpl 432 10542 0 10527 4 2 2 3 0 8 0 filepl 120 57948 0 57842 7 2 5 6 0 8 1 lockfpl 104 1464 0 1461 1 0 1 1 0 8 0 lockfspl 48 591 0 588 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 70 0 61 1 0 1 1 0 8 0 ucredpl 96 2840 0 2830 1 0 1 1 0 8 0 zombiepl 144 10528 0 10528 4 3 1 1 0 8 1 processpl 1000 10578 0 10528 8 1 7 7 0 8 0 procpl 672 21387 0 21330 17 11 6 6 0 8 1 sosppl 168 36 0 36 11 11 0 1 0 8 0 sockpl 448 19192 0 19165 30 26 4 5 0 8 1 mcl64k 65536 1361 0 1361 19 18 1 1 0 8 1 mcl16k 16384 82 0 82 17 16 1 1 0 8 1 mcl12k 12288 165 0 165 25 24 1 1 0 8 1 mcl9k 9216 81 0 81 24 23 1 1 0 8 1 mcl8k 8192 4238 0 4238 21 20 1 1 0 8 1 mcl4k 4096 390 0 390 19 18 1 1 0 8 1 mcl2k2 2112 35 0 35 24 24 0 1 0 8 0 mcl2k 2048 104019 0 103975 39 32 7 14 0 8 1 mtagpl 96 530 0 528 10 9 1 6 0 8 0 mbufpl 256 291201 0 291023 125 110 15 40 0 8 0 bufpl 280 19680 0 13281 458 0 458 458 0 8 0 anonpl 24 2721036 0 2706637 326 193 133 138 0 188 22 amapchunkpl 152 294639 0 294075 151 119 32 37 0 158 8 amappl16 200 23464 0 22816 144 101 43 48 0 8 8 amappl15 192 837 0 829 1 0 1 1 0 8 0 amappl14 184 1349 0 1345 1 0 1 1 0 8 0 amappl13 176 4100 0 4098 1 0 1 1 0 8 0 amappl12 168 1270 0 1268 1 0 1 1 0 8 0 amappl11 160 898 0 884 1 0 1 1 0 8 0 amappl10 152 174 0 173 2 1 1 1 0 8 0 amappl9 144 1386 0 1383 1 0 1 1 0 8 0 amappl8 136 1925 0 1875 3 1 2 2 0 8 0 amappl7 128 1322 0 1315 1 0 1 1 0 8 0 amappl6 120 1271 0 1259 1 0 1 1 0 8 0 amappl5 112 6925 0 6907 1 0 1 1 0 8 0 amappl4 104 3060 0 3028 1 0 1 1 0 8 0 amappl3 96 4237 0 4222 1 0 1 1 0 8 0 amappl2 88 18786 0 18736 2 0 2 2 0 8 0 amappl1 80 164480 0 164074 15 6 9 12 0 8 0 amappl 88 120585 0 120429 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 64 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 10583 0 10545 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10583 0 10545 1 0 1 1 0 8 0 vmmpekpl 168 50977 0 50947 2 0 2 2 0 8 0 vmmpepl 168 913677 0 911807 365 258 107 116 0 357 18 vmsppl 272 10582 0 10545 6 3 3 3 0 8 0 rwobjpl 24 198540 0 197171 21 11 10 10 0 8 1 pdppl 4096 21172 0 21113 101 38 63 63 0 8 4 pvpl 32 4788871 0 4771716 532 326 206 241 0 265 35 pmappl 192 10582 0 10545 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 861 0 400 14 0 14 14 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(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6628,ffff8000215f6634,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6628,ffff8000215f6634,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6628,ffff8000215f6634,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806a1fcd00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806a1fcd00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806a1fcd00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6768) 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(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8067bafc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f6628,ffff8000215f6634,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f6628,ffff8000215f6634,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f6628,ffff8000215f6634,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806a1fcd00) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806a1fcd00,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806a1fcd00) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6768) 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