uvm_fault(0xffffffff8287e280, 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 *239899 88000 0 0x14000 0x200 0K softnet nd6_dad_duplicated(0) at nd6_dad_duplicated+0x28 sys/netinet6/nd6_nbr.c:1265 nd6_ns_input(fffffd805c7a6500,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805c7a6500,28,18) 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,fffffd805c9b5000) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd805c9b5000,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd805c9b5000) 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(0xffffffff8287e280, 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(fffffd805c7a6500,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805c7a6500,28,18) 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,fffffd805c9b5000) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd805c9b5000,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd805c9b5000) 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 0xffff800021148540 r8 0xffffffff81820e8c nd6_ns_input+0x3bc r9 0x1 r10 0x608eb8eeece92b86 r11 0x484afe96bd03fb18 r12 0 r13 0x2 r14 0 r15 0xffff800000cd8900 rip 0xffffffff818236b8 nd6_dad_duplicated+0x28 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000211671a0 ss 0x10 nd6_dad_duplicated+0x28: movq 0x10(%r14),%r13 ddb{0}> show proc PROC (softnet) pid=239899 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000211482a0,0xffff800021148d30 process=0xffff8000ffffd4f0 user=0xffff800021162000, vmspace=0xffffffff8287e280 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37298 497511 97071 0 2 0 syz-executor.1 37298 118924 97071 0 2 0x4000000 syz-executor.1 86976 247111 0 0 3 0x14200 acct acct 99996 397552 68855 0 2 0x2 syz-executor.0 97071 263212 68855 0 3 0x82 nanoslp syz-executor.1 37402 203237 1 0 3 0x100083 ttyopn getty 35177 143991 0 0 3 0x14200 bored sosplice 68855 319784 80319 0 3 0x82 thrsleep syz-fuzzer 68855 453493 80319 0 3 0x4000082 nanoslp syz-fuzzer 68855 462062 80319 0 3 0x4000082 kqread syz-fuzzer 68855 310716 80319 0 3 0x4000082 nanoslp syz-fuzzer 68855 219939 80319 0 3 0x4000082 thrsleep syz-fuzzer 68855 289371 80319 0 3 0x4000082 thrsleep syz-fuzzer 68855 448020 80319 0 3 0x4000082 thrsleep syz-fuzzer 68855 367374 80319 0 3 0x4000082 thrsleep syz-fuzzer 80319 154179 34316 0 3 0x10008a sigsusp ksh 34316 98684 3824 0 3 0x9a kqread sshd 3824 173601 1 0 3 0x88 kqread sshd 39496 519596 64819 74 3 0x100092 bpf pflogd 64819 72879 1 0 3 0x80 netio pflogd 50199 320141 83920 73 3 0x100090 kqread syslogd 83920 398306 1 0 3 0x100082 netio syslogd 26235 70839 1 0 3 0x100080 kqread resolvd 97365 431404 14148 77 3 0x100092 kqread dhcpleased 84697 151518 14148 77 3 0x100092 kqread dhcpleased 14148 457083 1 0 3 0x80 kqread dhcpleased 91353 230465 0 0 3 0x14200 bored smr 63492 67793 0 0 2 0x14200 zerothread 59286 235537 0 0 3 0x14200 aiodoned aiodoned 66023 73113 0 0 3 0x14200 syncer update 90075 34174 0 0 3 0x14200 cleaner cleaner 38866 344452 0 0 3 0x14200 reaper reaper 47899 446465 0 0 3 0x14200 pgdaemon pagedaemon 91722 192360 0 0 3 0x14200 bored viomb 51892 301785 0 0 3 0x40014200 acpi0 acpi0 88412 256641 0 0 7 0x40014200 idle1 *88000 239899 0 0 7 0x14200 softnet 83826 407520 0 0 2 0x14200 systqmp 81689 9912 0 0 3 0x14200 bored systq 93094 427843 0 0 3 0x40014200 bored softclock 1517 387925 0 0 3 0x40014200 idle0 1 416976 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 99996 (syz-executor.0) thread 0xffff800021234000 (397552) exclusive rrwlock inode r = 0 (0xfffffd8073dd43c8) #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 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1c3 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3065 #10 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8060131c50) #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 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xdd sys/kern/vfs_lookup.c:413 #6 namei+0x55a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3050 #8 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #9 Xsyscall+0x128 Process 88000 (softnet) thread 0xffff800021148540 (239899) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82862d30) #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 (0xffffffff82804eb0) #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 10142 6467K 6905K 78643K 16938 0 pcb 14 8K 8K 78643K 1759 0 rtable 102 21K 23K 78643K 3536 0 ifaddr 75 25K 30K 78643K 1582 0 sysctl 3 1K 2K 78643K 12 0 counters 46 34K 35K 78643K 644 0 ioctlops 0 0K 4K 78643K 3710 0 iov 0 0K 24K 78643K 9252 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1288 81K 81K 78643K 5455 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 143 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1847 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 16530 0 sigio 0 0K 0K 78643K 168 0 proc 77 87K 111K 78643K 2329 0 subproc 66 4K 6K 78643K 1531 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1640 0 in_multi 12 0K 2K 78643K 1927 0 ether_multi 1 0K 0K 78643K 391 0 mrt 2 0K 0K 78643K 81 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 97 440K 440K 78643K 97 0 exec 0 0K 2K 78643K 2685 0 pfkey data 0 0K 1K 78643K 6 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 587 1162K 1162K 78643K 199832 0 UVM aobj 131 8K 8K 78643K 156 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1787 0 NDP 9 0K 0K 78643K 481 0 temp 98 4208K 8304K 78643K 228095 0 kqueue 17 26K 44K 78643K 1206 0 SYN cache 2 16K 16K 78643K 2 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 11253 0 11250 1 0 1 1 0 8 0 rtentry 112 1136 0 1122 3 1 2 2 0 8 0 unpcb 128 5925 0 5910 6 5 1 2 0 8 0 syncache 296 69 0 69 26 26 0 1 0 8 0 tcpqe 32 120 126 120 12 12 0 1 0 8 0 tcpcb 736 7339 0 7327 54 52 2 4 0 8 0 arp 120 175 0 173 1 0 1 1 0 8 0 inpcb 304 15310 0 15295 12 10 2 2 0 8 0 rttmr 72 21 0 21 11 11 0 1 0 8 0 nd6 48 256 0 256 5 5 0 1 0 8 0 pkpcb 40 118 0 118 35 35 0 1 0 8 0 kcovpl 48 46 0 44 1 0 1 1 0 8 0 ppxss 1248 59 0 59 35 34 1 1 0 8 1 pffrag 232 138 0 131 13 12 1 1 0 482 0 pffrnode 88 135 0 128 13 12 1 1 0 8 0 pffrent 40 1938 0 1892 15 14 1 1 0 8 0 pfosfp 40 1435 0 1009 5 0 5 5 0 8 0 pfosfpen 112 1435 0 715 21 0 21 21 0 8 0 pfrktable 1344 93 0 72 6 4 2 2 0 8 0 pftag 88 7 0 4 1 0 1 1 0 8 0 pfqueue 264 3 0 3 2 2 0 1 0 8 0 pfstitem 24 78 0 64 1 0 1 1 0 8 0 pfstkey 112 78 0 64 1 0 1 1 0 8 0 pfstate 320 78 0 64 4 2 2 3 0 8 0 pfrule 1360 217 0 159 5 0 5 5 0 8 0 art_heap8 4096 11 0 10 10 9 1 3 0 8 0 art_heap4 256 6180 0 6094 62 55 7 15 0 8 1 art_table 32 6191 0 6104 4 3 1 2 0 8 0 art_node 16 1127 0 1115 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 9 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 1843 0 1833 1 0 1 1 0 8 0 shmpl 112 153 0 25 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 21908 0 20444 93 1 92 92 0 8 0 ffsino 272 21908 0 20444 98 0 98 98 0 8 0 nchpl 144 44530 0 44073 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 132366 0 132365 22 21 1 1 0 8 0 percpumem 16 334 0 299 1 0 1 1 0 8 0 vcpupl 2048 116 0 1 15 0 15 15 0 8 0 vmpool 560 191 0 76 11 2 9 9 0 8 0 pfiaddrpl 120 43 0 17 2 1 1 1 0 8 0 scsiplug 72 8 0 8 7 7 0 1 0 8 0 scxspl 216 142761 0 142761 40 39 1 6 0 8 1 plimitpl 152 1180 0 1171 1 0 1 1 0 8 0 sigapl 424 16678 0 16644 7 2 5 7 0 8 0 futexpl 64 254724 0 254724 22 21 1 1 0 8 1 knotepl 112 298 0 0 3 0 3 3 0 8 0 kqueuepl 216 2858 0 2831 27 25 2 3 0 8 0 pipepl 336 2310 0 2300 15 13 2 2 0 8 1 fdescpl 496 16635 0 16617 3 0 3 3 0 8 0 filepl 152 93214 0 93064 25 18 7 8 0 8 1 lockfpl 104 3433 0 3431 1 0 1 1 0 8 0 lockfspl 48 1064 0 1062 1 0 1 1 0 8 0 sessionpl 144 64 0 53 1 0 1 1 0 8 0 pgrppl 48 114 0 103 1 0 1 1 0 8 0 ucredpl 96 10573 0 10559 1 0 1 1 0 8 0 zombiepl 144 16644 0 16644 12 11 1 1 0 8 1 processpl 1072 16678 0 16644 4 0 4 4 0 8 0 procpl 672 38748 0 38706 15 11 4 6 0 8 0 srpgc 96 29 0 29 12 12 0 1 0 8 0 sosppl 168 220 0 220 41 41 0 1 0 8 0 sockpl 480 32637 0 32604 65 59 6 8 0 8 1 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 37 0 0 2 0 2 2 0 8 0 mcl9k 9216 19 0 0 2 0 2 2 0 8 0 mcl8k 8192 40 0 0 5 1 4 4 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 647 0 0 65 1 64 64 0 8 0 mtagpl 96 40 0 0 1 0 1 1 0 8 0 mbufpl 256 2834 0 0 112 0 112 112 0 8 0 bufpl 280 37369 0 31040 453 0 453 453 0 8 0 anonpl 24 4650484 0 4631679 519 393 126 150 0 186 0 amapchunkpl 152 494326 0 493577 356 315 41 44 0 158 10 amappl16 200 43781 0 43093 418 380 38 49 0 8 1 amappl15 192 4900 0 4893 1 0 1 1 0 8 0 amappl14 184 1717 0 1714 2 1 1 1 0 8 0 amappl13 176 1294 0 1293 1 0 1 1 0 8 0 amappl12 168 1018 0 1010 1 0 1 1 0 8 0 amappl11 160 2066 0 2049 1 0 1 1 0 8 0 amappl10 152 3461 0 3452 1 0 1 1 0 8 0 amappl9 144 2379 0 2376 1 0 1 1 0 8 0 amappl8 136 3308 0 3147 6 0 6 6 0 8 0 amappl7 128 1992 0 1983 1 0 1 1 0 8 0 amappl6 120 2388 0 2371 1 0 1 1 0 8 0 amappl5 112 15756 0 15728 1 0 1 1 0 8 0 amappl4 104 6920 0 6890 1 0 1 1 0 8 0 amappl3 96 2952 0 2927 1 0 1 1 0 8 0 amappl2 88 18319 0 18231 6 4 2 3 0 8 0 amappl1 80 273464 0 273013 16 5 11 13 0 8 0 amappl 88 198222 0 197934 10 3 7 7 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 64 155 0 25 3 0 3 3 0 8 0 uaddrrnd 24 16826 0 16693 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 16826 0 16693 1 0 1 1 0 8 0 vmmpekpl 168 97400 0 97367 3 0 3 3 0 8 0 vmmpepl 168 1479783 0 1477319 970 858 112 145 0 357 0 vmsppl 368 16825 0 16693 17 4 13 13 0 8 0 rwobjpl 56 338013 0 336268 118 92 26 29 0 8 0 pdppl 4096 33660 0 33501 269 108 161 161 0 8 2 pvpl 32 8011761 0 7991193 827 641 186 242 0 265 0 pmappl 224 16825 0 16693 12 4 8 8 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 855 0 267 17 0 17 17 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(fffffd805c7a6500,28,18) at nd6_ns_input+0xdd4 nd6_dad_ns_input sys/netinet6/nd6_nbr.c:1342 [inline] nd6_ns_input(fffffd805c7a6500,28,18) 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,fffffd805c9b5000) at ipv6_input+0x48 sys/netinet6/ip6_input.c:171 if_input_local(ffff8000006ae000,fffffd805c9b5000,18) at if_input_local+0x136 sys/net/if.c:778 loinput(ffff8000006ae000,fffffd805c9b5000) 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 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