uvm_fault(0xffffffff829182b8, 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 *511647 8681 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f62f8,ffff8000215f6304,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f62f8,ffff8000215f6304,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f62f8,ffff8000215f6304,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806093c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806093c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806093c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6438) 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(0xffffffff829182b8, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f62f8,ffff8000215f6304,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f62f8,ffff8000215f6304,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f62f8,ffff8000215f6304,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806093c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806093c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806093c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6438) 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 0xffff8000215f5e80 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffea80 r8 0xffffffff82075955 nd6_ns_input+0x395 r9 0x1 r10 0x5a63ef8968e71eca r11 0x17397689ec2269e4 r12 0 r13 0x802 r14 0 r15 0xffff800000c93500 rip 0xffffffff820780a8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f5e00 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=511647 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffefc0,0xffff8000ffffe550 process=0xffff8000ffffd3b0 user=0xffff8000215f1000, vmspace=0xffffffff829182b8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 99289 178165 49026 0 2 0 syz-executor.0 99289 490846 49026 0 2 0x4000000 syz-executor.0 40518 296666 83744 0 2 0x2 syz-executor.1 85213 319591 0 0 3 0x14200 acct acct 49026 523657 83744 0 2 0x482 syz-executor.0 64806 301091 1 0 3 0x100083 ttyin getty 65880 412859 0 0 3 0x14200 bored sosplice 31228 1544 0 0 3 0x14280 nfsidl nfsio 10052 507601 0 0 3 0x14280 nfsidl nfsio 97140 293527 0 0 3 0x14280 nfsidl nfsio 90818 310486 0 0 3 0x14280 nfsidl nfsio 26926 111626 0 0 3 0x14280 nfsidl nfsio 33148 262262 0 0 3 0x14280 nfsidl nfsio 91541 193757 0 0 3 0x14280 nfsidl nfsio 83802 321491 0 0 3 0x14280 nfsidl nfsio 36779 345344 0 0 3 0x14280 nfsidl nfsio 88771 137535 0 0 3 0x14280 nfsidl nfsio 70124 485659 0 0 3 0x14280 nfsidl nfsio 83753 234308 0 0 3 0x14280 nfsidl nfsio 48821 241469 0 0 3 0x14280 nfsidl nfsio 5280 37584 0 0 3 0x14280 nfsidl nfsio 34343 365934 0 0 3 0x14280 nfsidl nfsio 31511 269360 0 0 3 0x14280 nfsidl nfsio 84950 211206 0 0 3 0x14280 nfsidl nfsio 31971 55215 0 0 3 0x14280 nfsidl nfsio 32510 196850 0 0 3 0x14280 nfsidl nfsio 89708 261031 0 0 3 0x14280 nfsidl nfsio 83744 336546 63124 0 3 0x82 thrsleep syz-fuzzer 83744 282082 63124 0 3 0x4000082 nanoslp syz-fuzzer 83744 196440 63124 0 3 0x4000082 thrsleep syz-fuzzer 83744 238333 63124 0 3 0x4000082 thrsleep syz-fuzzer 83744 106122 63124 0 3 0x4000082 thrsleep syz-fuzzer 83744 215066 63124 0 3 0x4000082 thrsleep syz-fuzzer 83744 332789 63124 0 3 0x4000082 kqread syz-fuzzer 63124 172199 58534 0 3 0x10008a sigsusp ksh 58534 492675 26804 0 3 0x9a kqread sshd 26804 111924 1 0 3 0x88 kqread sshd 78864 514123 2567 73 3 0x100090 kqread syslogd 2567 355435 1 0 3 0x100082 netio syslogd 36556 64010 1 0 3 0x100080 kqread resolvd 51229 401131 49420 77 3 0x100092 kqread dhcpleased 40475 109448 49420 77 3 0x100092 kqread dhcpleased 49420 364764 1 0 3 0x80 kqread dhcpleased 5841 493956 0 0 3 0x14200 bored smr 24899 438296 0 0 2 0x14200 zerothread 67369 346341 0 0 3 0x14200 aiodoned aiodoned 54487 141707 0 0 3 0x14200 syncer update 3883 222352 0 0 3 0x14200 cleaner cleaner 27389 503680 0 0 3 0x14200 reaper reaper 21170 194456 0 0 3 0x14200 pgdaemon pagedaemon 63133 280027 0 0 3 0x14200 bored viomb 81432 187057 0 0 3 0x40014200 acpi0 acpi0 * 8681 511647 0 0 7 0x14200 softnet 18434 178208 0 0 2 0x14200 systqmp 31225 247919 0 0 3 0x14200 bored systq 77339 275893 0 0 3 0x40014200 bored softclock 64304 109261 0 0 3 0x40014200 idle0 1 10828 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 10133 6979K 7485K 78643K 14723 0 pcb 13 8K 8K 78643K 2076 0 rtable 172 30K 32K 78643K 4261 0 ifaddr 79 22K 25K 78643K 1429 0 sysctl 3 1K 1K 78643K 7 0 counters 21 16K 17K 78643K 211 0 ioctlops 0 0K 4K 78643K 2577 0 iov 0 0K 36K 78643K 9224 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1246 78K 80K 78643K 4375 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 124 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 1002 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 10950 0 sigio 0 0K 0K 78643K 75 0 proc 67 55K 71K 78643K 1546 0 subproc 66 4K 4K 78643K 1192 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 717 0 in_multi 20 1K 2K 78643K 1091 0 ether_multi 1 0K 0K 78643K 200 0 mrt 2 0K 0K 78643K 59 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 139 625K 625K 78643K 139 0 exec 0 0K 2K 78643K 2140 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 341 589K 589K 78643K 130963 0 UVM aobj 131 8K 8K 78643K 138 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1927 0 NDP 7 0K 0K 78643K 302 0 temp 118 4254K 4834K 78643K 126054 0 kqueue 12 18K 35K 78643K 524 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 120 616 0 613 1 0 1 1 0 8 0 rtentry 112 764 0 733 2 0 2 2 0 8 0 unpcb 128 6274 0 6261 5 4 1 2 0 8 0 syncache 296 83 0 83 24 24 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 74 0 74 11 11 0 1 0 8 0 tcpcb 736 4033 0 4023 50 47 3 5 0 8 0 arp 88 124 0 119 1 0 1 1 0 8 0 ipq 40 76 0 76 24 23 1 1 0 8 1 ipqe 40 1359 0 1359 24 23 1 1 0 8 1 inpcb 304 10738 0 10727 37 35 2 2 0 8 1 rttmr 72 15 0 15 13 13 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 nd6 48 149 0 148 5 4 1 1 0 8 0 pkpcb 40 94 0 94 25 25 0 1 0 8 0 kcovpl 48 36 0 34 1 0 1 1 0 8 0 ppxss 1152 29 0 29 22 22 0 1 0 8 0 pfstscr 40 83 0 83 2 2 0 1 0 8 0 pfosfp 40 12 0 10 1 0 1 1 0 8 0 pfosfpen 112 12 0 8 1 0 1 1 0 8 0 pfrktable 1344 1024 0 988 16 13 3 4 0 8 0 pftag 88 61 0 47 1 0 1 1 0 8 0 pfqueue 264 8 0 6 2 1 1 1 0 8 0 pfstitem 24 60 0 60 2 2 0 1 0 8 0 pfstkey 112 102 0 102 3 3 0 1 0 8 0 pfstate 320 53 0 53 3 3 0 1 0 8 0 pfrule 1360 755 0 554 19 2 17 17 0 8 0 art_heap8 4096 12 0 10 11 9 2 3 0 8 0 art_heap4 256 3580 0 3337 50 33 17 17 0 8 1 art_table 32 3592 0 3347 3 0 3 3 0 8 0 art_node 16 757 0 727 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 999 0 989 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17603 0 16196 89 0 89 89 0 8 0 ffsino 240 17603 0 16196 84 0 84 84 0 8 0 nchpl 144 34276 0 33833 60 41 19 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 108286 0 108285 19 18 1 1 0 8 0 vcpupl 1984 60 0 0 8 0 8 8 0 8 0 vmpool 528 119 0 59 5 1 4 4 0 8 0 pfiaddrpl 120 449 0 356 3 0 3 3 0 8 0 scsiplug 72 6 0 6 6 6 0 1 0 8 0 scxspl 216 121082 0 121082 67 64 3 8 0 8 3 plimitpl 152 1313 0 1305 1 0 1 1 0 8 0 sigapl 424 11112 0 11061 6 0 6 6 0 8 0 futexpl 64 199658 0 199658 19 18 1 1 0 8 1 knotepl 112 81445 0 81402 3 1 2 3 0 8 0 kqueuepl 184 2488 0 2473 13 12 1 2 0 8 0 pipepl 304 1525 0 1515 33 32 1 2 0 8 0 fdescpl 432 11066 0 11050 5 3 2 3 0 8 0 filepl 120 72142 0 71997 14 9 5 6 0 8 0 lockfpl 104 7868 0 7866 1 0 1 1 0 8 0 lockfspl 48 3113 0 3111 1 0 1 1 0 8 0 sessionpl 144 53 0 43 1 0 1 1 0 8 0 pgrppl 48 103 0 93 1 0 1 1 0 8 0 ucredpl 96 8795 0 8785 1 0 1 1 0 8 0 zombiepl 144 11061 0 11061 4 3 1 1 0 8 1 processpl 1008 11112 0 11061 7 0 7 7 0 8 0 procpl 672 23387 0 23329 6 0 6 6 0 8 0 sosppl 168 125 0 125 33 33 0 1 0 8 0 sockpl 448 17734 0 17707 43 39 4 5 0 8 1 mcl64k 65536 311 0 311 39 38 1 2 0 8 1 mcl16k 16384 92 0 92 44 44 0 1 0 8 0 mcl12k 12288 378 0 378 31 30 1 1 0 8 1 mcl9k 9216 204 0 204 41 41 0 1 0 8 0 mcl8k 8192 456 0 456 33 32 1 1 0 8 1 mcl4k 4096 882 0 882 22 21 1 1 0 8 1 mcl2k2 2112 55 0 55 32 31 1 1 0 8 1 mcl2k 2048 94011 0 93977 31 26 5 12 0 8 0 mtagpl 96 193 0 193 2 2 0 1 0 8 0 mbufpl 256 217886 0 217716 258 238 20 35 0 8 8 bufpl 280 32312 0 25913 458 0 458 458 0 8 0 anonpl 24 3087295 0 3068181 512 374 138 144 0 188 17 amapchunkpl 152 328995 0 328392 309 284 25 39 0 158 1 amappl16 200 33215 0 32478 387 345 42 54 0 8 3 amappl15 192 350 0 344 1 0 1 1 0 8 0 amappl14 184 598 0 596 1 0 1 1 0 8 0 amappl13 176 2948 0 2942 1 0 1 1 0 8 0 amappl12 168 292 0 291 1 0 1 1 0 8 0 amappl11 160 341 0 327 1 0 1 1 0 8 0 amappl10 152 2414 0 2414 4 4 0 1 0 8 0 amappl9 144 2239 0 2236 1 0 1 1 0 8 0 amappl8 136 3198 0 3139 3 0 3 3 0 8 0 amappl7 128 2270 0 2260 1 0 1 1 0 8 0 amappl6 120 2183 0 2177 1 0 1 1 0 8 0 amappl5 112 11372 0 11354 1 0 1 1 0 8 0 amappl4 104 1893 0 1867 1 0 1 1 0 8 0 amappl3 96 2859 0 2842 1 0 1 1 0 8 0 amappl2 88 14151 0 14088 2 0 2 2 0 8 0 amappl1 80 175532 0 175120 18 9 9 12 0 8 0 amappl 88 127497 0 127310 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 64 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 11185 0 11109 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11185 0 11109 1 0 1 1 0 8 0 vmmpekpl 168 63727 0 63695 2 0 2 2 0 8 0 vmmpepl 168 1005454 0 1003370 665 565 100 123 0 357 5 vmsppl 272 11184 0 11109 11 5 6 6 0 8 0 rwobjpl 24 220425 0 218908 42 31 11 11 0 8 0 pdppl 4096 22376 0 22278 163 62 101 101 0 8 3 pvpl 32 5376245 0 5354895 707 498 209 241 0 265 30 pmappl 192 11184 0 11109 6 2 4 4 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 972 0 616 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(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f62f8,ffff8000215f6304,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f62f8,ffff8000215f6304,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f62f8,ffff8000215f6304,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806093c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806093c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806093c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6438) 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(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806d46a600,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f62f8,ffff8000215f6304,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f62f8,ffff8000215f6304,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f62f8,ffff8000215f6304,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd806093c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd806093c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd806093c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f6438) 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