uvm_fault(0xffffffff829033d8, 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 151273 84099 0 0 0x4000000 0 syz-executor.0 *110532 68558 0 0x14000 0x200 1K softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167088,ffff800021167094,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167088,ffff800021167094,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167088,ffff800021167094,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd806f77c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd806f77c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd806f77c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211671c8) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff829033d8, 0x10, 0, 1) -> e ddb{1}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167088,ffff800021167094,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167088,ffff800021167094,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167088,ffff800021167094,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd806f77c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd806f77c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd806f77c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211671c8) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800021166c20 rbx 0 rdx 0 rcx 0x7 rax 0xffff800021148000 r8 0xffffffff810060fc nd6_ns_input+0x3bc r9 0x1 r10 0xc2adf2466e7178e0 r11 0xa162e7ed3161c34e r12 0 r13 0x3 r14 0 r15 0xffff800000c69900 rip 0xffffffff81008928 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021166ba0 ss 0 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb{1}> show proc PROC (softnet) pid=110532 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021148a80,0xffff8000211482b0 process=0xffff8000ffffd8f0 user=0xffff800021162000, vmspace=0xffffffff829033d8 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86493 335566 63649 0 2 0 syz-executor.1 86493 157168 63649 0 3 0x4000080 fsleep syz-executor.1 84099 461639 95401 0 2 0 syz-executor.0 84099 37301 95401 0 3 0x4000080 fsleep syz-executor.0 84099 214359 95401 0 3 0x4000080 fsleep syz-executor.0 84099 151273 95401 0 7 0x4000000 syz-executor.0 95401 32365 60185 0 3 0x82 nanoslp syz-executor.0 63649 224277 60185 0 3 0x82 nanoslp syz-executor.1 9820 265148 0 0 3 0x14200 acct acct 6818 120810 1 0 3 0x100083 ttyin getty 13851 58502 0 0 3 0x14200 bored sosplice 60185 472867 45122 0 3 0x82 thrsleep syz-fuzzer 60185 422412 45122 0 3 0x4000082 nanoslp syz-fuzzer 60185 443996 45122 0 3 0x4000082 thrsleep syz-fuzzer 60185 487270 45122 0 3 0x4000082 thrsleep syz-fuzzer 60185 104439 45122 0 3 0x4000082 thrsleep syz-fuzzer 60185 256552 45122 0 3 0x4000082 thrsleep syz-fuzzer 60185 82633 45122 0 3 0x4000082 thrsleep syz-fuzzer 60185 499543 45122 0 3 0x4000082 kqread syz-fuzzer 45122 643 14791 0 3 0x10008a sigsusp ksh 14791 225504 47271 0 3 0x9a kqread sshd 47271 199708 1 0 3 0x88 kqread sshd 19019 258183 76815 74 3 0x100092 bpf pflogd 76815 256360 1 0 3 0x80 netio pflogd 65726 353941 75129 73 3 0x100090 kqread syslogd 75129 304995 1 0 3 0x100082 netio syslogd 24067 408309 1 0 3 0x100080 kqread resolvd 85696 115497 0 0 3 0x14200 bored smr 76224 402730 0 0 2 0x14200 zerothread 64714 421924 0 0 3 0x14200 aiodoned aiodoned 59560 298875 0 0 3 0x14200 syncer update 81031 240886 0 0 3 0x14200 cleaner cleaner 50430 516886 0 0 3 0x14200 reaper reaper 75662 4245 0 0 3 0x14200 pgdaemon pagedaemon 54311 281079 0 0 3 0x14200 bored viomb 50940 320121 0 0 3 0x40014200 acpi0 acpi0 87 20573 0 0 3 0x40014200 idle1 *68558 110532 0 0 7 0x14200 softnet 29260 48399 0 0 2 0x14200 systqmp 13817 468725 0 0 3 0x14200 bored systq 6326 108204 0 0 3 0x40014200 bored softclock 71439 55382 0 0 3 0x40014200 idle0 1 477009 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex amapchunkpl r = 0 (0xffffffff829f3dd0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:581 #4 amap_alloc1+0x2a0 sys/uvm/uvm_amap.c:384 #5 amap_alloc+0x83 sys/uvm/uvm_amap.c:429 #6 amap_copy+0x62c sys/uvm/uvm_amap.c:589 #7 uvm_fault_check+0x67b uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] #7 uvm_fault_check+0x67b sys/uvm/uvm_fault.c:712 #8 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #9 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #10 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #11 recall_trap+0x8 Process 84099 (syz-executor.0) thread 0xffff800021235a40 (151273) exclusive rwlock vmmaplk r = 0 (0xfffffd8079cc7030) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5422 #3 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1695 #4 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:712 #5 uvm_fault+0x102 sys/uvm/uvm_fault.c:601 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 Process 68558 (softnet) thread 0xffff800021148000 (110532) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828be3e0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 kpageflttrap+0x229 sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 #5 nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] #5 nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 #6 icmp6_input+0xabe sys/netinet6/icmp6.c:686 #7 ip_deliver+0x322 sys/netinet/ip_input.c:658 #8 ip6_input_if+0x978 #9 ipv6_input+0x48 sys/netinet6/ip6_input.c:171 #10 if_input_local+0x136 sys/net/if.c:778 #11 loinput+0x4d sys/net/if_loop.c:238 #12 if_input_process+0xd2 sys/net/if.c:843 #13 ifiq_process+0x80 sys/net/ifq.c:773 #14 taskq_thread+0xe6 sys/kern/kern_task.c:449 #15 proc_trampoline+0x1c exclusive rwlock netlock r = 0 (0xffffffff827ff110) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 if_input_process+0xa1 sys/net/if.c:843 #2 ifiq_process+0x80 sys/net/ifq.c:773 #3 taskq_thread+0xe6 sys/kern/kern_task.c:449 #4 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002c070) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 taskq_thread+0xcb sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10131 6448K 14742K 78643K 13537 0 pcb 14 8K 8K 78643K 865 0 rtable 111 20K 23K 78643K 2440 0 ifaddr 58 15K 17K 78643K 933 0 sysctl 3 1K 1K 78643K 3 0 counters 44 34K 34K 78643K 278 0 ioctlops 0 0K 4K 78643K 2329 0 iov 0 0K 24K 78643K 407 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1249 79K 79K 78643K 2942 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 43 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 317 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 6536 0 sigio 0 0K 0K 78643K 50 0 proc 65 63K 111K 78643K 1226 0 subproc 66 4K 4K 78643K 798 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1500 0 in_multi 24 1K 2K 78643K 958 0 ether_multi 1 0K 0K 78643K 148 0 mrt 2 0K 0K 78643K 57 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 1282 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 400 783K 800K 78643K 85389 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 906 0 NDP 7 0K 0K 78643K 223 0 temp 93 4212K 8314K 78643K 106932 0 kqueue 6 10K 24K 78643K 421 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 374 0 373 1 0 1 1 0 8 0 rtentry 112 639 0 615 2 0 2 2 0 8 0 unpcb 128 3149 0 3134 8 7 1 3 0 8 0 syncache 296 130 0 130 6 6 0 1 0 8 0 tcpqe 32 8 0 8 5 5 0 1 0 8 0 tcpcb 736 4807 0 4787 35 33 2 9 0 8 0 arp 120 81 0 79 1 0 1 1 0 8 0 inpcb 304 12373 0 12366 11 9 2 3 0 8 1 rttmr 72 15 0 15 9 9 0 1 0 8 0 nd6 48 135 0 131 2 1 1 1 0 8 0 pkpcb 40 36 0 36 11 11 0 1 0 8 0 kcovpl 48 24 0 22 1 0 1 1 0 8 0 ppxss 1248 23 0 23 14 13 1 1 0 8 1 pffrag 232 54 0 54 5 5 0 1 0 482 0 pffrnode 88 54 0 54 5 5 0 1 0 8 0 pffrent 40 938 0 938 5 5 0 1 0 8 0 pfosfp 40 1430 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1430 0 714 21 0 21 21 0 8 0 pfrktable 1344 347 0 330 11 9 2 3 0 8 0 pftag 88 18 0 11 1 0 1 1 0 8 0 pfqueue 264 8 0 4 1 0 1 1 0 8 0 pfstitem 24 28 0 26 1 0 1 1 0 8 0 pfstkey 112 29 0 27 1 0 1 1 0 8 0 pfstate 320 29 0 27 3 2 1 3 0 8 0 pfrule 1360 414 0 341 8 1 7 7 0 8 0 art_heap8 4096 5 0 4 3 2 1 2 0 8 0 art_heap4 256 3296 0 3150 29 19 10 16 0 8 0 art_table 32 3301 0 3154 3 1 2 3 0 8 0 art_node 16 636 0 615 1 0 1 1 0 8 0 sysvmsgpl 40 55 0 19 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 315 0 305 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 9325 0 7890 95 4 91 91 0 8 0 ffsino 272 9325 0 7890 97 0 97 97 0 8 0 nchpl 144 17817 0 17366 61 41 20 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 53548 0 53548 9 8 1 1 0 8 1 percpumem 16 151 0 117 1 0 1 1 0 8 0 vcpupl 2048 73 0 0 10 0 10 10 0 8 0 vmpool 560 93 0 20 6 0 6 6 0 8 0 pfiaddrpl 120 91 0 75 7 6 1 1 0 8 0 scsiplug 72 8 0 8 6 6 0 1 0 8 0 scxspl 216 62954 0 62954 34 33 1 5 0 8 1 plimitpl 152 448 0 440 1 0 1 1 0 8 0 sigapl 424 6765 0 6733 9 4 5 7 0 8 0 futexpl 64 83198 0 83195 10 9 1 1 0 8 0 knotepl 112 188 0 0 3 0 3 3 0 8 0 kqueuepl 216 1247 0 1236 3 2 1 2 0 8 0 pipepl 336 898 0 888 11 9 2 2 0 8 0 fdescpl 496 6706 0 6690 3 0 3 3 0 8 0 filepl 152 39613 0 39475 15 8 7 8 0 8 1 lockfpl 104 1395 0 1394 1 0 1 1 0 8 0 lockfspl 48 447 0 446 1 0 1 1 0 8 0 sessionpl 144 41 0 31 1 0 1 1 0 8 0 pgrppl 48 70 0 60 1 0 1 1 0 8 0 ucredpl 96 3820 0 3811 1 0 1 1 0 8 0 zombiepl 144 6733 0 6733 3 2 1 1 0 8 1 processpl 1064 6765 0 6733 4 0 4 4 0 8 0 procpl 672 18974 0 18931 10 5 5 6 0 8 0 srpgc 96 6 0 6 3 3 0 1 0 8 0 sosppl 168 79 0 79 20 19 1 1 0 8 1 sockpl 480 15956 0 15933 37 32 5 10 0 8 2 mcl64k 65536 27 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 26 0 0 2 1 1 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 32 0 0 4 0 4 4 0 8 0 mcl4k 4096 24 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 375 0 0 33 0 33 33 0 8 0 mtagpl 96 25 0 0 1 0 1 1 0 8 0 mbufpl 256 1157 0 0 51 0 51 51 0 8 0 bufpl 280 15235 0 8906 453 0 453 453 0 8 0 anonpl 24 2006283 0 1987875 340 200 140 141 0 186 21 amapchunkpl 152 213866 0 213185 155 114 41 42 0 158 10 amappl16 200 17505 0 16849 165 121 44 46 0 8 8 amappl15 192 1424 0 1417 1 0 1 1 0 8 0 amappl14 184 2001 0 1998 5 4 1 1 0 8 0 amappl13 176 164 0 162 1 0 1 1 0 8 0 amappl12 168 1153 0 1146 1 0 1 1 0 8 0 amappl11 160 1132 0 1121 1 0 1 1 0 8 0 amappl10 152 825 0 820 1 0 1 1 0 8 0 amappl9 144 755 0 754 1 0 1 1 0 8 0 amappl8 136 1217 0 1156 3 0 3 3 0 8 0 amappl7 128 519 0 510 1 0 1 1 0 8 0 amappl6 120 642 0 633 1 0 1 1 0 8 0 amappl5 112 4548 0 4523 1 0 1 1 0 8 0 amappl4 104 3910 0 3880 1 0 1 1 0 8 0 amappl3 96 1649 0 1627 1 0 1 1 0 8 0 amappl2 88 8037 0 7992 5 3 2 2 0 8 0 amappl1 80 124412 0 123997 14 4 10 13 0 8 0 amappl 88 84478 0 84250 6 0 6 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 64 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 6799 0 6710 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6799 0 6710 1 0 1 1 0 8 0 vmmpekpl 168 47492 0 47451 3 0 3 3 0 8 0 vmmpepl 168 619150 0 617081 384 268 116 126 0 357 22 vmsppl 368 6798 0 6710 11 2 9 9 0 8 0 rwobjpl 56 154077 0 152610 53 28 25 25 0 8 1 pdppl 4096 13605 0 13493 168 52 116 120 0 8 4 pvpl 32 3494044 0 3473559 545 318 227 237 0 265 46 pmappl 224 6798 0 6710 6 0 6 6 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 579 0 132 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82828ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828be1d8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828be1d8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 uvm_fault(fffffd8079cc7018,c91c5618000,0,2) at uvm_fault+0x224 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800021cbd150,c91c5618628) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021cbd150) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82828ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828be1d8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828be1d8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 uvm_fault(fffffd8079cc7018,c91c5618000,0,2) at uvm_fault+0x224 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800021cbd150,c91c5618628) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800021cbd150) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167088,ffff800021167094,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167088,ffff800021167094,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167088,ffff800021167094,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd806f77c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd806f77c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd806f77c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211671c8) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: 4 ddb{1}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd806eecde00,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167088,ffff800021167094,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167088,ffff800021167094,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167088,ffff800021167094,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd806f77c800) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd806f77c800,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd806f77c800) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211671c8) at if_input_process+0xd2 sys/net/if.c:843 ifiq_process(ffff8000006ae450) at ifiq_process+0x80 sys/net/ifq.c:773 taskq_thread(ffff80000002c000) at taskq_thread+0xe6 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -11