uvm_fault(0xffffffff829c7ff0, 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 *286247 8286 0 0x14000 0x200 0K softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021166f28,ffff800021166f34,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021166f28,ffff800021166f34,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021166f28,ffff800021166f34,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80638e1900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80638e1900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80638e1900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167068) 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff829c7ff0, 0x10, 0, 1) -> e ddb{0}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021166f28,ffff800021166f34,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021166f28,ffff800021166f34,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021166f28,ffff800021166f34,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80638e1900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80638e1900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80638e1900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167068) 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{0}> show registers rdi 0 rsi 0 rbp 0xffff800021166ac0 rbx 0 rdx 0 rcx 0x7 rax 0xffff800021148000 r8 0xffffffff822bc62c nd6_ns_input+0x3bc r9 0x1 r10 0x434a92aef67bd765 r11 0x28398d08edaa4710 r12 0 r13 0x2 r14 0 r15 0xffff800000c90f00 rip 0xffffffff822bee58 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021166a40 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb{0}> show proc PROC (softnet) pid=286247 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000211487e0,0xffff8000211482b0 process=0xffff8000ffffe180 user=0xffff800021162000, vmspace=0xffffffff829c7ff0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19674 216654 16742 0 2 0 syz-executor.0 19674 428595 16742 0 2 0x4000000 syz-executor.0 16742 17335 57340 0 2 0x482 syz-executor.0 46381 170936 57340 0 2 0x2 syz-executor.1 81352 185835 1 0 3 0x100083 ttyin getty 53660 402726 0 0 3 0x14280 nfsidl nfsio 34752 496993 0 0 3 0x14280 nfsidl nfsio 45152 350695 0 0 3 0x14280 nfsidl nfsio 80026 370337 0 0 3 0x14280 nfsidl nfsio 10940 214771 0 0 3 0x14280 nfsidl nfsio 80217 430903 0 0 3 0x14280 nfsidl nfsio 12726 154785 0 0 3 0x14280 nfsidl nfsio 12058 95849 0 0 3 0x14280 nfsidl nfsio 8670 227944 0 0 3 0x14280 nfsidl nfsio 38569 343251 0 0 3 0x14280 nfsidl nfsio 80800 295501 0 0 3 0x14280 nfsidl nfsio 89683 91527 0 0 3 0x14280 nfsidl nfsio 70357 74121 0 0 3 0x14280 nfsidl nfsio 40154 78217 0 0 3 0x14280 nfsidl nfsio 49862 462734 0 0 3 0x14280 nfsidl nfsio 31549 97046 0 0 3 0x14280 nfsidl nfsio 94307 250566 0 0 3 0x14280 nfsidl nfsio 12454 430349 0 0 3 0x14280 nfsidl nfsio 45673 39345 0 0 3 0x14280 nfsidl nfsio 61698 332528 0 0 3 0x14280 nfsidl nfsio 52949 78444 0 0 3 0x14200 bored sosplice 57340 380944 94694 0 3 0x82 thrsleep syz-fuzzer 57340 516341 94694 0 2 0x4000482 syz-fuzzer 57340 136985 94694 0 3 0x4000082 thrsleep syz-fuzzer 57340 514930 94694 0 3 0x4000082 thrsleep syz-fuzzer 57340 360565 94694 0 3 0x4000082 thrsleep syz-fuzzer 57340 455230 94694 0 3 0x4000082 thrsleep syz-fuzzer 57340 8979 94694 0 2 0x4000482 syz-fuzzer 57340 215747 94694 0 3 0x4000082 kqread syz-fuzzer 94694 202885 12435 0 3 0x10008a sigsusp ksh 12435 406917 24369 0 3 0x9a kqread sshd 24369 493746 1 0 3 0x88 kqread sshd 73114 81279 63672 74 3 0x100092 bpf pflogd 63672 217679 1 0 3 0x80 netio pflogd 74949 267060 80167 73 3 0x100090 kqread syslogd 80167 57312 1 0 3 0x100082 netio syslogd 93626 286174 1 0 3 0x100080 kqread resolvd 30212 83625 0 0 3 0x14200 bored smr 457 436416 0 0 2 0x14200 zerothread 16772 108694 0 0 3 0x14200 aiodoned aiodoned 61032 57303 0 0 3 0x14200 syncer update 89282 420359 0 0 3 0x14200 cleaner cleaner 36168 13995 0 0 3 0x14200 reaper reaper 98692 127132 0 0 3 0x14200 pgdaemon pagedaemon 87979 449638 0 0 3 0x14200 bored viomb 19189 261192 0 0 3 0x40014200 acpi0 acpi0 57900 273846 0 0 7 0x40014200 idle1 * 8286 286247 0 0 7 0x14200 softnet 41132 372809 0 0 2 0x14200 systqmp 662 455636 0 0 3 0x14200 bored systq 15398 523383 0 0 2 0x40014200 softclock 461 356446 0 0 3 0x40014200 idle0 1 317236 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 8286 (softnet) thread 0xffff800021148000 (286247) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82885178) #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 (0xffffffff828290f0) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10143 6460K 7272K 78643K 20084 0 pcb 14 14K 18K 78643K 1643 0 rtable 123 18K 19K 78643K 4572 0 ifaddr 59 21K 24K 78643K 1532 0 sysctl 3 1K 1K 78643K 11 0 counters 44 34K 34K 78643K 556 0 ioctlops 0 0K 4K 78643K 3591 0 iov 0 0K 24K 78643K 1080 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1285 81K 81K 78643K 7858 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 128 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 3042 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 17158 0 sigio 0 0K 0K 78643K 263 0 proc 69 63K 111K 78643K 3145 0 subproc 66 4K 6K 78643K 2792 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1113 0 in_multi 26 1K 2K 78643K 2133 0 ether_multi 1 0K 0K 78643K 249 0 mrt 2 0K 0K 78643K 97 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 127 572K 572K 78643K 127 0 exec 0 0K 2K 78643K 3217 0 pfkey data 0 0K 1K 78643K 4 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 522 1290K 1307K 78643K 202140 0 UVM aobj 131 8K 8K 78643K 188 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 2038 0 NDP 8 0K 0K 78643K 525 0 temp 94 4206K 8302K 78643K 330201 0 kqueue 6 10K 30K 78643K 1357 0 SYN cache 2 8K 16K 78643K 3 0 ddb{0}> 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 120 941 0 940 1 0 1 1 0 8 0 rtentry 112 1611 0 1579 2 0 2 2 0 8 0 unpcb 128 18170 0 18162 13 12 1 2 0 8 0 syncache 296 77 0 77 29 29 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 116 2 116 11 11 0 1 0 8 0 tcpcb 736 4107 0 4095 75 73 2 4 0 8 0 arp 120 231 0 225 1 0 1 1 0 8 0 inpcb 304 12556 0 12283 86 64 22 22 0 8 0 rttmr 72 23 0 23 15 14 1 1 0 8 1 nd6 48 377 0 372 1 0 1 1 0 8 0 pkpcb 40 64 0 64 22 22 0 1 0 8 0 kcovpl 48 84 0 82 1 0 1 1 0 8 0 ppxss 1248 55 0 55 37 37 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 80 0 78 29 28 1 1 0 482 0 pffrnode 88 80 0 78 29 28 1 1 0 8 0 pffrent 40 1472 0 1470 32 31 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 70 0 57 5 3 2 2 0 8 0 pftag 88 4 0 2 2 1 1 1 0 8 0 pfstitem 24 44 0 42 1 0 1 1 0 8 0 pfstkey 112 48 0 46 1 0 1 1 0 8 0 pfstate 320 46 0 44 2 1 1 2 0 8 0 pfrule 1360 191 0 151 5 1 4 4 0 8 0 art_heap8 4096 8 0 7 7 6 1 3 0 8 0 art_heap4 256 7715 0 7575 58 47 11 16 0 8 0 art_table 32 7723 0 7582 3 1 2 3 0 8 0 art_node 16 1599 0 1572 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 17 1 0 1 1 0 8 0 semapl 112 3040 0 3030 1 0 1 1 0 8 0 shmpl 112 185 0 57 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 22765 0 21306 92 0 92 92 0 8 0 ffsino 272 22765 0 21306 100 2 98 98 0 8 0 nchpl 144 49995 0 49557 61 43 18 61 0 8 0 uvmvnodes 72 6173 0 0 113 0 113 113 0 8 0 vnodes 224 6173 0 0 364 0 364 364 0 8 0 namei 1024 150302 0 150302 42 41 1 1 0 8 1 percpumem 16 290 0 256 1 0 1 1 0 8 0 vcpupl 2048 143 0 1 18 0 18 18 0 8 0 vmpool 560 185 0 43 13 2 11 11 0 8 0 pfiaddrpl 120 27 0 16 2 1 1 1 0 8 0 scsiplug 72 6 0 6 6 5 1 1 0 8 1 scxspl 216 186436 0 186436 46 45 1 8 0 8 1 plimitpl 152 1004 0 996 1 0 1 1 0 8 0 sigapl 424 17208 0 17158 8 2 6 7 0 8 0 futexpl 64 258714 0 258714 43 42 1 1 0 8 1 knotepl 112 378 0 0 3 0 3 3 0 8 0 kqueuepl 216 3463 0 3452 3 2 1 2 0 8 0 pipepl 336 2361 0 2351 40 38 2 2 0 8 0 fdescpl 496 17149 0 17134 3 0 3 3 0 8 0 filepl 152 106386 0 106253 40 34 6 8 0 8 0 lockfpl 104 3322 0 3320 1 0 1 1 0 8 0 lockfspl 48 1046 0 1044 1 0 1 1 0 8 0 sessionpl 144 96 0 86 1 0 1 1 0 8 0 pgrppl 48 151 0 141 1 0 1 1 0 8 0 ucredpl 96 12963 0 12953 1 0 1 1 0 8 0 zombiepl 144 17158 0 17158 4 3 1 1 0 8 1 processpl 1072 17208 0 17158 5 1 4 4 0 8 0 procpl 672 38487 0 38429 12 6 6 6 0 8 0 srpgc 96 25 0 25 11 11 0 1 0 8 0 sosppl 168 227 0 227 66 65 1 1 0 8 1 sockpl 480 31773 0 31491 107 70 37 39 0 8 1 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 606 0 0 54 0 54 54 0 8 0 mtagpl 96 420 0 0 11 6 5 11 0 8 0 mbufpl 256 2513 0 0 66 0 66 66 0 8 0 bufpl 280 37466 0 31144 457 4 453 453 0 8 0 anonpl 24 4729441 0 4712260 696 589 107 134 0 186 1 amapchunkpl 152 493753 0 493054 381 339 42 42 0 158 13 amappl16 200 42234 0 41646 393 360 33 44 0 8 1 amappl15 192 2528 0 2523 1 0 1 1 0 8 0 amappl14 184 1386 0 1382 2 1 1 1 0 8 0 amappl13 176 2487 0 2486 1 0 1 1 0 8 0 amappl12 168 1338 0 1335 1 0 1 1 0 8 0 amappl11 160 2972 0 2959 1 0 1 1 0 8 0 amappl10 152 2270 0 2264 1 0 1 1 0 8 0 amappl9 144 2224 0 2223 1 0 1 1 0 8 0 amappl8 136 4790 0 4675 6 1 5 5 0 8 1 amappl7 128 3245 0 3234 1 0 1 1 0 8 0 amappl6 120 2353 0 2341 1 0 1 1 0 8 0 amappl5 112 15207 0 15181 1 0 1 1 0 8 0 amappl4 104 6616 0 6586 1 0 1 1 0 8 0 amappl3 96 4011 0 3988 1 0 1 1 0 8 0 amappl2 88 20350 0 20299 8 6 2 2 0 8 0 amappl1 80 281282 0 280876 14 4 10 13 0 8 0 amappl 88 200243 0 199992 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 64 187 0 57 3 0 3 3 0 8 0 uaddrrnd 24 17334 0 17177 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17334 0 17177 1 0 1 1 0 8 0 vmmpekpl 168 92867 0 92818 3 0 3 3 0 8 0 vmmpepl 168 1536902 0 1534806 987 864 123 126 0 357 26 vmsppl 368 17333 0 17177 17 2 15 15 0 8 0 rwobjpl 56 344187 0 342707 110 87 23 25 0 8 1 pdppl 4096 34676 0 34496 312 129 183 183 0 8 3 pvpl 32 8753421 0 8733670 1118 947 171 233 0 265 4 pmappl 224 17333 0 17177 11 1 10 10 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 901 0 341 16 0 16 16 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd80638be200,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021166f28,ffff800021166f34,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021166f28,ffff800021166f34,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021166f28,ffff800021166f34,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80638e1900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80638e1900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80638e1900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff800021167068) 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{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5