uvm_fault(0xffffffff8291d370, 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 * 73830 85700 0 0x14000 0x200 0 softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f5e58,ffff8000215f5e64,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f5e58,ffff8000215f5e64,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f5e58,ffff8000215f5e64,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd805fdfc200) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd805fdfc200,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd805fdfc200) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f5f98) 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(0xffffffff8291d370, 0x10, 0, 1) -> e ddb> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f5e58,ffff8000215f5e64,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f5e58,ffff8000215f5e64,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f5e58,ffff8000215f5e64,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd805fdfc200) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd805fdfc200,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd805fdfc200) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f5f98) 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 0xffff8000215f59e0 rbx 0 rdx 0 rcx 0x7 rax 0xffff8000ffffe2a0 r8 0xffffffff81ecac35 nd6_ns_input+0x395 r9 0x1 r10 0xb253b6627c99a6d3 r11 0x424aa582d476f1a2 r12 0 r13 0x802 r14 0 r15 0xffff800000c57800 rip 0xffffffff81ecd388 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000215f5960 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb> show proc PROC (softnet) pid=73830 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffefc0,0xffff8000ffffe010 process=0xffff8000ffffc7e0 user=0xffff8000215f1000, vmspace=0xffffffff8291d370 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 56218 226689 62768 0 2 0 syz-executor.0 56218 27569 62768 0 2 0x4000000 syz-executor.0 32767 259463 3181 0 2 0x482 syz-executor.1 62768 448540 3181 0 2 0x482 syz-executor.0 39594 461959 0 0 3 0x14200 acct acct 6599 426745 0 0 3 0x14200 bored sosplice 3181 127394 49360 0 3 0x82 thrsleep syz-fuzzer 3181 217247 49360 0 3 0x4000082 thrsleep syz-fuzzer 3181 340060 49360 0 3 0x4000082 thrsleep syz-fuzzer 3181 339733 49360 0 3 0x4000082 kqread syz-fuzzer 3181 5162 49360 0 3 0x4000082 thrsleep syz-fuzzer 3181 19596 49360 0 3 0x4000082 thrsleep syz-fuzzer 3181 147066 49360 0 3 0x4000082 thrsleep syz-fuzzer 49360 321704 11719 0 3 0x10008a sigsusp ksh 11719 236218 41774 0 3 0x9a kqread sshd 54148 465646 1 0 3 0x100083 ttyin getty 41774 191317 1 0 3 0x88 kqread sshd 43982 113936 95658 73 3 0x100090 kqread syslogd 95658 201452 1 0 3 0x100082 netio syslogd 62739 41977 1 0 3 0x100080 kqread resolvd 74408 280204 37105 77 3 0x100092 kqread dhcpleased 90873 343869 37105 77 3 0x100092 kqread dhcpleased 37105 463115 1 0 3 0x80 kqread dhcpleased 23734 321990 0 0 3 0x14200 bored smr 64278 92480 0 0 2 0x14200 zerothread 96116 43312 0 0 3 0x14200 aiodoned aiodoned 65922 225903 0 0 3 0x14200 syncer update 78030 28839 0 0 3 0x14200 cleaner cleaner 94156 39413 0 0 3 0x14200 reaper reaper 58130 453444 0 0 3 0x14200 pgdaemon pagedaemon 16825 492575 0 0 3 0x14200 bored viomb 56277 67954 0 0 3 0x40014200 acpi0 acpi0 *85700 73830 0 0 7 0x14200 softnet 89354 41806 0 0 2 0x14200 systqmp 76266 16655 0 0 3 0x14200 bored systq 5273 54472 0 0 3 0x40014200 bored softclock 4029 459207 0 0 3 0x40014200 idle0 1 367179 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 10117 6372K 6669K 78643K 12052 0 pcb 13 8K 8K 78643K 347 0 rtable 149 17K 17K 78643K 6519 0 ifaddr 66 17K 18K 78643K 2518 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 17K 78643K 78 0 ioctlops 0 0K 4K 78643K 3153 0 iov 0 0K 20K 78643K 191 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1253 79K 79K 78643K 2136 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 491 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 5605 0 sigio 0 0K 0K 78643K 37 0 proc 60 55K 71K 78643K 779 0 subproc 66 4K 4K 78643K 495 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 190 0 in_multi 34 2K 2K 78643K 460 0 ether_multi 1 0K 0K 78643K 61 0 mrt 1 0K 0K 78643K 27 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 904 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 275 280K 296K 78643K 66228 0 UVM aobj 58 4K 4K 78643K 86 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 332 0 NDP 8 0K 0K 78643K 119 0 temp 89 4198K 6230K 78643K 35172 0 kqueue 13 18K 28K 78643K 235 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 120 164 0 161 1 0 1 1 0 8 0 rtentry 112 339 0 304 3 1 2 2 0 8 0 unpcb 128 2865 0 2852 2 0 2 2 0 8 1 syncache 296 30 0 30 11 11 0 1 0 8 0 tcpqe 32 148 0 148 4 4 0 1 0 8 0 tcpcb 736 841 0 837 17 15 2 4 0 8 1 arp 88 45 0 39 1 0 1 1 0 8 0 ipq 40 24 0 23 6 5 1 1 0 8 0 ipqe 40 528 0 526 6 5 1 1 0 8 0 inpcb 304 3104 0 3093 19 17 2 2 0 8 1 rttmr 72 7 0 7 4 4 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 78 0 72 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 kcovpl 48 15 0 13 1 0 1 1 0 8 0 ppxss 1152 16 0 16 8 7 1 1 0 8 1 pfstscr 40 29 0 29 8 7 1 1 0 8 1 pfosfp 40 10 0 8 1 0 1 1 0 8 0 pfosfpen 112 10 0 5 1 0 1 1 0 8 0 pfrktable 1344 2766 0 2740 7 4 3 3 0 8 0 pftag 88 49 0 40 2 1 1 1 0 8 0 pfqueue 264 8 0 6 1 0 1 1 0 8 0 pfstitem 24 14 0 14 6 5 1 1 0 8 1 pfstkey 112 33 0 33 8 7 1 1 0 8 1 pfstate 320 17 0 17 8 7 1 1 0 8 1 pfrule 1360 2634 0 2143 45 3 42 42 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1616 0 1434 31 18 13 16 0 8 1 art_table 32 1617 0 1434 2 0 2 2 0 8 0 art_node 16 334 0 302 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 5 1 0 1 1 0 8 0 semapl 112 485 0 475 1 0 1 1 0 8 0 shmpl 112 83 0 28 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8714 0 7305 89 0 89 89 0 8 0 ffsino 240 8714 0 7305 84 0 84 84 0 8 0 nchpl 144 17589 0 15994 61 0 61 61 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 49487 0 49487 8 7 1 1 0 8 1 vcpupl 1984 29 0 2 4 0 4 4 0 8 0 vmpool 528 50 0 23 2 0 2 2 0 8 0 pfiaddrpl 120 3244 0 3173 5 2 3 3 0 8 0 scsiplug 72 5 0 5 3 3 0 1 0 8 0 scxspl 216 53843 0 53843 21 20 1 8 0 8 1 plimitpl 152 234 0 225 1 0 1 1 0 8 0 sigapl 424 5818 0 5787 6 1 5 6 0 8 0 futexpl 64 84326 0 84326 8 7 1 1 0 8 1 knotepl 112 43681 0 43638 2 0 2 2 0 8 0 kqueuepl 184 683 0 672 2 1 1 2 0 8 0 pipepl 304 442 0 432 10 9 1 2 0 8 0 fdescpl 432 5782 0 5766 4 1 3 3 0 8 1 filepl 120 29762 0 29616 8 3 5 6 0 8 0 lockfpl 104 732 0 729 1 0 1 1 0 8 0 lockfspl 48 232 0 229 1 0 1 1 0 8 0 sessionpl 144 30 0 20 1 0 1 1 0 8 0 pgrppl 48 54 0 44 1 0 1 1 0 8 0 ucredpl 96 1980 0 1970 1 0 1 1 0 8 0 zombiepl 144 5787 0 5786 3 2 1 1 0 8 0 processpl 1008 5818 0 5786 8 3 5 7 0 8 0 procpl 672 11761 0 11722 12 8 4 6 0 8 0 sosppl 168 39 0 39 11 10 1 1 0 8 1 sockpl 448 6148 0 6121 19 13 6 6 0 8 3 mcl64k 65536 1504 0 1504 19 18 1 2 0 8 1 mcl16k 16384 20 0 20 11 11 0 1 0 8 0 mcl12k 12288 450 0 450 16 15 1 1 0 8 1 mcl9k 9216 42 0 42 19 19 0 1 0 8 0 mcl8k 8192 1152 0 1152 19 18 1 1 0 8 1 mcl4k 4096 365 0 365 20 19 1 1 0 8 1 mcl2k2 2112 35 0 35 12 12 0 1 0 8 0 mcl2k 2048 82185 0 82143 18 11 7 12 0 8 0 mtagpl 96 55 0 55 2 2 0 1 0 8 0 mbufpl 256 171128 0 170928 89 74 15 38 0 8 0 bufpl 280 12500 0 6101 458 0 458 458 0 8 0 anonpl 24 1528567 0 1512099 218 80 138 138 0 188 21 amapchunkpl 152 162578 0 162000 119 84 35 38 0 158 11 amappl16 200 15394 0 14690 133 94 39 53 0 8 1 amappl15 192 2539 0 2535 1 0 1 1 0 8 0 amappl14 184 292 0 290 1 0 1 1 0 8 0 amappl13 176 434 0 433 1 0 1 1 0 8 0 amappl12 168 1025 0 1023 4 3 1 1 0 8 0 amappl11 160 764 0 750 1 0 1 1 0 8 0 amappl10 152 8 0 6 1 0 1 1 0 8 0 amappl9 144 1006 0 1002 1 0 1 1 0 8 0 amappl8 136 599 0 549 2 0 2 2 0 8 0 amappl7 128 102 0 96 1 0 1 1 0 8 0 amappl6 120 868 0 860 1 0 1 1 0 8 0 amappl5 112 4084 0 4066 1 0 1 1 0 8 0 amappl4 104 2280 0 2253 1 0 1 1 0 8 0 amappl3 96 1704 0 1688 1 0 1 1 0 8 0 amappl2 88 8158 0 8112 2 0 2 2 0 8 0 amappl1 80 92896 0 92478 14 4 10 12 0 8 0 amappl 88 65626 0 65458 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 85 0 28 1 0 1 1 0 8 0 uaddrrnd 24 5832 0 5789 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5832 0 5789 1 0 1 1 0 8 0 vmmpekpl 168 30153 0 30125 2 0 2 2 0 8 0 vmmpepl 168 512735 0 510802 309 190 119 120 0 357 28 vmsppl 272 5831 0 5789 5 1 4 4 0 8 1 rwobjpl 24 113245 0 111805 25 15 10 11 0 8 1 pdppl 4096 11670 0 11605 115 44 71 71 0 8 6 pvpl 32 2620911 0 2600991 364 120 244 244 0 265 61 pmappl 192 5831 0 5789 5 2 3 3 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 596 0 254 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(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f5e58,ffff8000215f5e64,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f5e58,ffff8000215f5e64,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f5e58,ffff8000215f5e64,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd805fdfc200) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd805fdfc200,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd805fdfc200) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f5f98) 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(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805fdfcc00,28,18) at nd6_ns_input+0xd74 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff8000215f5e58,ffff8000215f5e64,3a,18) at icmp6_input+0xa26 sys/netinet6/icmp6.c:686 ip_deliver(ffff8000215f5e58,ffff8000215f5e64,3a,18) at ip_deliver+0x2c2 sys/netinet/ip_input.c:658 ip6_input_if(ffff8000215f5e58,ffff8000215f5e64,29,0,ffff8000006ac000) at ip6_input_if+0x936 ipv6_input(ffff8000006ac000,fffffd805fdfc200) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ac000,fffffd805fdfc200,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ac000,fffffd805fdfc200) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ac000,ffff8000215f5f98) 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