uvm_fault(0xffffffff829b12d0, 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 *400866 36155 0 0x14000 0x200 0 softnet 237983 56796 0 0x14000 0x200 1 systqmp nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167688,ffff800021167694,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167688,ffff800021167694,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167688,ffff800021167694,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80607e4900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80607e4900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80607e4900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211677c8) 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(0xffffffff829b12d0, 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(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167688,ffff800021167694,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167688,ffff800021167694,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167688,ffff800021167694,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80607e4900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80607e4900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80607e4900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211677c8) 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 0xffff800021167220 rbx 0 rdx 0 rcx 0x7 rax 0xffff800021148a80 r8 0xffffffff8221b7ac nd6_ns_input+0x3bc r9 0x1 r10 0x6ef4933e8107f078 r11 0x196c6615dc9af043 r12 0 r13 0x2 r14 0 r15 0xffff800000c2a500 rip 0xffffffff8221dfd8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000211671a0 ss 0 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb{0}> show proc PROC (softnet) pid=400866 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021148d20,0xffff8000211487f0 process=0xffff8000ffffe180 user=0xffff800021162000, vmspace=0xffffffff829b12d0 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2899 490841 41427 0 2 0 syz-executor.1 2899 282603 41427 0 2 0x4000000 syz-executor.1 89037 201488 58356 0 2 0x482 syz-executor.0 17520 367871 0 0 3 0x14200 acct acct 41427 339097 58356 0 3 0x82 nanoslp syz-executor.1 99531 248558 1 0 3 0x100083 ttyin getty 37919 172838 0 0 3 0x14280 nfsidl nfsio 67625 302244 0 0 3 0x14280 nfsidl nfsio 71039 228882 0 0 3 0x14280 nfsidl nfsio 11631 130376 0 0 3 0x14280 nfsidl nfsio 67703 5018 0 0 3 0x14280 nfsidl nfsio 5171 207008 0 0 3 0x14280 nfsidl nfsio 28971 415464 0 0 3 0x14280 nfsidl nfsio 51593 121291 0 0 3 0x14280 nfsidl nfsio 14470 151046 0 0 3 0x14280 nfsidl nfsio 21087 457175 0 0 3 0x14280 nfsidl nfsio 61709 294198 0 0 3 0x14280 nfsidl nfsio 41323 175419 0 0 3 0x14280 nfsidl nfsio 28471 280369 0 0 3 0x14280 nfsidl nfsio 37171 411399 0 0 3 0x14280 nfsidl nfsio 11204 422080 0 0 3 0x14280 nfsidl nfsio 89347 336439 0 0 3 0x14280 nfsidl nfsio 12538 405920 0 0 3 0x14280 nfsidl nfsio 23767 415688 0 0 3 0x14280 nfsidl nfsio 26564 200591 0 0 3 0x14280 nfsidl nfsio 41834 390294 0 0 3 0x14280 nfsidl nfsio 50258 292061 0 0 3 0x14200 bored sosplice 58356 149118 56856 0 3 0x82 thrsleep syz-fuzzer 58356 396685 56856 0 3 0x4000082 thrsleep syz-fuzzer 58356 37661 56856 0 3 0x4000082 thrsleep syz-fuzzer 58356 120866 56856 0 3 0x4000082 thrsleep syz-fuzzer 58356 116857 56856 0 3 0x4000082 kqread syz-fuzzer 58356 37400 56856 0 3 0x4000082 thrsleep syz-fuzzer 58356 284974 56856 0 3 0x4000082 thrsleep syz-fuzzer 58356 114527 56856 0 3 0x4000082 thrsleep syz-fuzzer 56856 107116 66474 0 3 0x10008a sigsusp ksh 66474 138312 25944 0 3 0x9a kqread sshd 25944 276047 1 0 3 0x88 kqread sshd 39907 187997 77947 74 3 0x100092 bpf pflogd 77947 337486 1 0 3 0x80 netio pflogd 53362 117577 82800 73 3 0x100090 kqread syslogd 82800 279114 1 0 3 0x100082 netio syslogd 65625 404092 1 0 3 0x100080 kqread resolvd 86410 520219 0 0 3 0x14200 bored smr 20366 482223 0 0 3 0x14200 pgzero zerothread 10007 142750 0 0 3 0x14200 aiodoned aiodoned 80261 252444 0 0 3 0x14200 syncer update 40054 519733 0 0 3 0x14200 cleaner cleaner 44807 446652 0 0 3 0x14200 reaper reaper 9243 227764 0 0 3 0x14200 pgdaemon pagedaemon 21681 437051 0 0 3 0x14200 bored viomb 60228 313012 0 0 3 0x40014200 acpi0 acpi0 25656 342002 0 0 3 0x40014200 idle1 *36155 400866 0 0 7 0x14200 softnet 56796 237983 0 0 7 0x14200 systqmp 88464 428358 0 0 3 0x14200 bored systq 49409 413069 0 0 2 0x40014200 softclock 18002 60943 0 0 3 0x40014200 idle0 1 46202 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 36155 (softnet) thread 0xffff800021148a80 (400866) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8294f760) #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 (0xffffffff827efb90) #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 Process 56796 (systqmp) thread 0xffff800021148d20 (237983) shared rwlock systqmp r = 0 (0xffffffff82831fd0) #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 10133 6535K 7718K 78643K 21539 0 pcb 14 8K 8K 78643K 616 0 rtable 117 14K 17K 78643K 4832 0 ifaddr 93 24K 25K 78643K 1191 0 sysctl 3 1K 1K 78643K 3 0 counters 44 34K 34K 78643K 250 0 ioctlops 0 0K 5K 78643K 4658 0 iov 0 0K 24K 78643K 432 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1261 79K 79K 78643K 4657 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 59 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 655 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 7212 0 sigio 0 0K 0K 78643K 53 0 proc 64 63K 111K 78643K 1136 0 subproc 66 4K 4K 78643K 670 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 571 0 in_multi 16 1K 2K 78643K 1775 0 ether_multi 1 0K 0K 78643K 79 0 mrt 2 0K 0K 78643K 40 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 1259 0 pfkey data 0 0K 1K 78643K 11 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 386 684K 685K 78643K 94664 0 UVM aobj 131 9K 9K 78643K 160 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 643 0 NDP 7 0K 0K 78643K 374 0 temp 94 4214K 8310K 78643K 103654 0 kqueue 6 10K 26K 78643K 409 0 SYN cache 2 0K 16K 78643K 4 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 120 299 0 298 1 0 1 1 0 8 0 rtentry 112 1193 0 1170 2 0 2 2 0 8 0 unpcb 128 2209 0 2201 1 0 1 1 0 8 0 syncache 296 46 0 46 17 17 0 1 0 8 0 tcpqe 32 72 0 72 8 8 0 1 0 8 0 tcpcb 736 2645 0 2635 23 22 1 4 0 8 0 arp 120 61 0 57 1 0 1 1 0 8 0 inpcb 304 6854 0 6846 11 9 2 3 0 8 1 rttmr 72 11 0 11 9 9 0 1 0 8 0 nd6 48 307 0 305 2 1 1 1 0 8 0 pkpcb 40 60 0 60 20 20 0 1 0 8 0 kcovpl 48 20 0 18 1 0 1 1 0 8 0 ppxss 1248 34 0 34 17 17 0 1 0 8 0 pfstscr 40 16 0 16 4 4 0 1 0 8 0 pffrag 232 54 0 54 8 7 1 1 0 482 1 pffrnode 88 54 0 54 8 7 1 1 0 8 1 pffrent 40 1013 0 1013 7 6 1 1 0 8 1 pfosfp 40 1434 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1434 0 715 21 0 21 21 0 8 0 pfrktable 1344 1016 0 994 3 1 2 3 0 8 0 pftag 88 5 0 4 2 1 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 68 0 66 1 0 1 1 0 8 0 pfstkey 112 76 0 74 2 1 1 2 0 8 0 pfstate 320 68 0 66 4 3 1 4 0 8 0 pfrule 1360 1301 0 1212 10 2 8 8 0 8 0 art_heap8 4096 3 0 2 2 1 1 2 0 8 0 art_heap4 256 7390 0 7304 39 28 11 16 0 8 2 art_table 32 7393 0 7306 3 1 2 3 0 8 0 art_node 16 1187 0 1170 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 647 0 637 1 0 1 1 0 8 0 shmpl 112 157 0 29 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10087 0 8657 90 0 90 90 0 8 0 ffsino 272 10087 0 8657 96 0 96 96 0 8 0 nchpl 144 21107 0 20650 61 42 19 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 64727 0 64727 7 6 1 1 0 8 1 percpumem 16 137 0 103 1 0 1 1 0 8 0 vcpupl 2048 67 0 0 9 0 9 9 0 8 0 vmpool 560 95 0 28 5 0 5 5 0 8 0 pfiaddrpl 120 510 0 463 3 1 2 2 0 8 0 scsiplug 72 8 0 8 7 7 0 1 0 8 0 scxspl 216 72989 0 72989 23 22 1 8 0 8 1 plimitpl 152 449 0 441 1 0 1 1 0 8 0 sigapl 424 7432 0 7381 9 2 7 7 0 8 0 futexpl 64 92344 0 92344 8 7 1 1 0 8 1 knotepl 112 163 0 0 4 1 3 3 0 8 0 kqueuepl 216 1038 0 1026 13 12 1 2 0 8 0 pipepl 336 957 0 947 9 6 3 3 0 8 2 fdescpl 496 7396 0 7381 3 0 3 3 0 8 0 filepl 152 41181 0 41049 14 6 8 8 0 8 2 lockfpl 104 4432 0 4431 1 0 1 1 0 8 0 lockfspl 48 1461 0 1460 1 0 1 1 0 8 0 sessionpl 144 39 0 29 1 0 1 1 0 8 0 pgrppl 48 64 0 54 1 0 1 1 0 8 0 ucredpl 96 4041 0 4032 1 0 1 1 0 8 0 zombiepl 144 7381 0 7380 2 1 1 1 0 8 0 processpl 1072 7432 0 7380 4 0 4 4 0 8 0 procpl 672 21127 0 21067 10 4 6 6 0 8 0 srpgc 96 10 0 10 5 5 0 1 0 8 0 sosppl 168 85 0 85 21 21 0 1 0 8 0 sockpl 480 9436 0 9419 29 24 5 7 0 8 2 mcl64k 65536 34 0 0 3 0 3 3 0 8 0 mcl16k 16384 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 23 0 0 2 0 2 2 0 8 0 mcl8k 8192 35 0 0 5 0 5 5 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 428 0 0 41 1 40 40 0 8 0 mtagpl 96 341 0 0 8 3 5 8 0 8 0 mbufpl 256 1552 0 0 87 0 87 87 0 8 0 bufpl 280 19746 0 13417 453 0 453 453 0 8 0 anonpl 24 2222049 0 2205172 324 204 120 132 0 186 11 amapchunkpl 152 230839 0 230192 122 95 27 40 0 158 0 amappl16 200 19705 0 19119 174 136 38 45 0 8 7 amappl15 192 1451 0 1444 1 0 1 1 0 8 0 amappl14 184 1760 0 1758 3 2 1 1 0 8 0 amappl13 176 1263 0 1261 1 0 1 1 0 8 0 amappl12 168 2053 0 2051 3 2 1 1 0 8 0 amappl11 160 88 0 77 1 0 1 1 0 8 0 amappl10 152 487 0 483 1 0 1 1 0 8 0 amappl9 144 658 0 658 3 3 0 1 0 8 0 amappl8 136 1438 0 1359 3 0 3 3 0 8 0 amappl7 128 773 0 761 1 0 1 1 0 8 0 amappl6 120 535 0 525 1 0 1 1 0 8 0 amappl5 112 5937 0 5911 1 0 1 1 0 8 0 amappl4 104 1865 0 1829 3 2 1 2 0 8 0 amappl3 96 3240 0 3217 1 0 1 1 0 8 0 amappl2 88 9619 0 9570 3 1 2 2 0 8 0 amappl1 80 134576 0 134176 13 3 10 13 0 8 0 amappl 88 93830 0 93620 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 64 159 0 29 3 0 3 3 0 8 0 uaddrrnd 24 7491 0 7409 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7491 0 7409 1 0 1 1 0 8 0 vmmpekpl 168 50035 0 49996 2 0 2 2 0 8 0 vmmpepl 168 680416 0 678494 346 249 97 119 0 357 4 vmsppl 368 7490 0 7409 10 2 8 8 0 8 0 rwobjpl 56 168917 0 167523 55 33 22 24 0 8 1 pdppl 4096 14990 0 14885 159 51 108 108 0 8 3 pvpl 32 3863923 0 3844054 529 337 192 233 0 265 21 pmappl 224 7490 0 7409 5 0 5 5 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 601 0 121 14 0 14 14 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(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd8060ba0800,28,18) at nd6_ns_input+0xdd4 sys/netinet6/nd6_nbr.c:301 icmp6_input(ffff800021167688,ffff800021167694,3a,18) at icmp6_input+0xabe sys/netinet6/icmp6.c:686 ip_deliver(ffff800021167688,ffff800021167694,3a,18) at ip_deliver+0x322 sys/netinet/ip_input.c:658 ip6_input_if(ffff800021167688,ffff800021167694,29,0,ffff8000006ae000) at ip6_input_if+0x978 ipv6_input(ffff8000006ae000,fffffd80607e4900) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd80607e4900,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd80607e4900) at loinput+0x4d sys/net/if_loop.c:238 if_input_process(ffff8000006ae000,ffff8000211677c8) 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