kernel: protection fault trap, code=0 Stopped at pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace pf_anchor_global_RB_REMOVE(ffffffff82b89cd8,ffff800000e89000) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84 pf_remove_if_empty_ruleset(ffff800000e89490) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300 pfi_dynaddr_setup(ffff800000ed5828,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485 pfioctl(4900,cd60441a,ffff800000be8000,3,ffff800021220000) at pfioctl+0x8e11 pf_addr_setup sys/net/pf_ioctl.c:893 [inline] pfioctl(4900,cd60441a,ffff800000be8000,3,ffff800021220000) at pfioctl+0x8e11 sys/net/pf_ioctl.c:1652 VOP_IOCTL(fffffd806f605d48,cd60441a,ffff800000be8000,3,fffffd807f7d81e0,ffff800021220000) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd805bb9dda8,cd60441a,ffff800000be8000,ffff800021220000) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021220000,ffff80002e3f7b28,ffff80002e3f7b80) at sys_ioctl+0x4a2 syscall(ffff80002e3f7bf0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7bf0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb52bfbb27a0, count: -9 ddb{0}> show registers rdi 0xffff80002e6dc000 rsi 0x13eb __ALIGN_SIZE+0x3eb rbp 0xffff80002e3f7600 rbx 0xffffffff82b89cd8 pf_anchors rdx 0xffff80002e6dc000 rcx 0x13ea __ALIGN_SIZE+0x3ea rax 0xffffffff8252ceab pf_anchor_global_RB_REMOVE+0x2b r8 0x400 r9 0x8080808080808080 r10 0xe671c5f0954f5d8a r11 0x21da3c4605fcd5b3 r12 0xea10c2048d2e05dd r13 0xffffffff82b89ce0 pf_main_anchor r14 0xffff800000e89000 r15 0xdeaf007fdeafbead rip 0xffffffff8252ced8 pf_anchor_global_RB_REMOVE+0x58 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80002e3f75b0 ss 0x10 pf_anchor_global_RB_REMOVE+0x58: movq 0(%r12),%rbx ddb{0}> show proc PROC (syz-executor.6) pid=369957 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=85, nice=20 forw=0xffffffffffffffff, list=0xffff800022e44550,0xffff800021220fd0 process=0xffff8000291050b8 user=0xffff80002e3f2000, vmspace=0xfffffd806358fa38 estcpu=35, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17683 188394 71208 0 2 0 syz-executor.2 25534 473550 59346 0 2 0 syz-executor.4 24319 265010 22145 0 2 0 syz-executor.6 *24319 369957 22145 0 7 0x4000000 syz-executor.6 6766 387238 55504 0 2 0 syz-executor.3 6766 157578 55504 0 3 0x4000080 fsleep syz-executor.3 15500 496375 42462 0 2 0 syz-executor.1 15500 251636 42462 0 3 0x4000080 fsleep syz-executor.1 71208 140435 21268 0 3 0x82 nanoslp syz-executor.2 59346 194934 21268 0 3 0x82 nanoslp syz-executor.4 37867 379737 21268 0 3 0x82 nanoslp syz-executor.7 15471 265961 21268 0 2 0x2 syz-executor.0 68028 148275 21268 0 2 0x482 syz-executor.5 22145 195499 21268 0 3 0x82 nanoslp syz-executor.6 52442 20474 0 0 3 0x14280 nfsidl nfsio 14322 302751 0 0 3 0x14280 nfsidl nfsio 57014 389206 0 0 3 0x14280 nfsidl nfsio 82698 316058 0 0 3 0x14280 nfsidl nfsio 83105 304109 0 0 3 0x14280 nfsidl nfsio 36454 84610 0 0 3 0x14280 nfsidl nfsio 25669 456846 0 0 3 0x14200 acct acct 55504 340485 21268 0 3 0x82 nanoslp syz-executor.3 42462 362931 21268 0 2 0x482 syz-executor.1 46169 51380 1 0 3 0x100083 ttyopn getty 9985 508762 0 0 3 0x14200 bored sosplice 21268 324927 63748 0 3 0x82 kqread syz-fuzzer 21268 336123 63748 0 3 0x4000082 nanoslp syz-fuzzer 21268 64838 63748 0 3 0x4000082 nanoslp syz-fuzzer 21268 154491 63748 0 3 0x4000082 thrsleep syz-fuzzer 21268 331779 63748 0 3 0x4000082 thrsleep syz-fuzzer 21268 42618 63748 0 3 0x4000082 thrsleep syz-fuzzer 21268 369884 63748 0 3 0x4000082 thrsleep syz-fuzzer 21268 101723 63748 0 3 0x4000082 thrsleep syz-fuzzer 21268 372589 63748 0 3 0x4000082 thrsleep syz-fuzzer 63748 230731 34847 0 3 0x10008a sigsusp ksh 34847 125778 50385 0 3 0x9a kqread sshd 50385 511686 1 0 3 0x88 kqread sshd 17925 142533 40091 74 3 0x1100092 bpf pflogd 40091 434161 1 0 3 0x80 netio pflogd 93703 127224 23315 73 3 0x1100090 kqread syslogd 23315 361625 1 0 3 0x100082 netio syslogd 29872 159664 1 0 3 0x100080 kqread resolvd 5121 80909 47034 77 3 0x100092 kqread dhcpleased 27663 197629 47034 77 3 0x100092 kqread dhcpleased 47034 175134 1 0 3 0x80 kqread dhcpleased 11429 452988 0 0 3 0x14200 bored smr 6437 88845 0 0 2 0x14200 zerothread 87817 496811 0 0 3 0x14200 aiodoned aiodoned 66520 232824 0 0 3 0x14200 syncer update 76466 55436 0 0 3 0x14200 cleaner cleaner 36136 74487 0 0 3 0x14200 reaper reaper 84161 400219 0 0 3 0x14200 pgdaemon pagedaemon 87213 108316 0 0 3 0x14200 bored viomb 63160 352406 0 0 3 0x40014200 acpi0 acpi0 3511 330526 0 0 7 0x40014200 idle1 99541 23428 0 0 3 0x14200 bored softnet 45250 186705 0 0 3 0x14200 bored systqmp 18689 408985 0 0 3 0x14200 bored systq 11949 333115 0 0 2 0x40014200 softclock 88963 522004 0 0 3 0x40014200 idle0 1 283486 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 24319 (syz-executor.6) thread 0xffff800021220000 (369957) exclusive rwlock pf_lock r = 0 (0xffffffff829b0e40) #0 witness_lock+0x44d #1 pfioctl+0x5be8 sys/net/pf_ioctl.c:1607 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive rwlock netlock r = 0 (0xffffffff82971810) #0 witness_lock+0x44d #1 pfioctl+0x3708 sys/net/pf_ioctl.c:1607 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive rwlock pfioctl_rw r = 0 (0xffffffff829b0ea0) #0 witness_lock+0x44d #1 pfioctl+0x15e sys/net/pf_ioctl.c:1147 #2 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #3 vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4a2 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a34310) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 15471 (syz-executor.0) thread 0xffff800027ac3510 (265961) exclusive rrwlock inode r = 0 (0xfffffd805e6a4b40) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd805f9646f8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 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+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 6579K 8836K 78643K 51953 0 pcb 13 22K 26K 78643K 3880 0 rtable 215 16K 18K 78643K 9822 0 ifaddr 103 28K 31K 78643K 4641 0 sysctl 3 1K 5K 78643K 10 0 counters 56 35K 36K 78643K 826 0 ioctlops 1 4K 4K 78643K 10173 0 iov 0 0K 32K 78643K 3866 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1833 115K 115K 78643K 16505 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 333 0 VM map 2 1K 1K 78643K 2 0 sem 23 5K 5K 78643K 550 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 29751 0 sigio 0 0K 0K 78643K 562 0 proc 72 87K 123K 78643K 5326 0 subproc 104 6K 7K 78643K 1739 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1294 0 in_multi 84 5K 7K 78643K 2107 0 ether_multi 1 0K 0K 78643K 210 0 mrt 1 0K 0K 78643K 142 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 7380 0 pfkey data 0 0K 0K 78643K 72 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 747 2170K 2171K 78643K 362639 0 UVM aobj 131 4K 4K 78643K 147 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1400 0 NDP 13 0K 1K 78643K 692 0 temp 218 4879K 5061K 78643K 286221 0 kqueue 15 24K 40K 78643K 4669 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 1755 0 1752 21 20 1 3 0 8 0 rtentry 112 1909 0 1821 4 1 3 4 0 8 0 unpcb 136 18696 0 18681 188 185 3 9 0 8 2 syncache 296 75 0 75 22 22 0 1 0 8 0 tcpqe 32 40 0 40 6 6 0 1 0 8 0 tcpcb 736 10183 0 10179 356 346 10 24 0 8 9 arp 120 341 0 325 1 0 1 1 0 8 0 inpcb 312 48981 0 48974 463 452 11 19 0 8 10 rttmr 72 40 0 40 13 13 0 1 0 8 0 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 9 0 9 1 1 0 1 0 8 0 nd6 48 454 0 432 1 0 1 1 0 8 0 pkpcb 40 152 0 152 18 18 0 1 0 8 0 kcovpl 48 133 0 125 1 0 1 1 0 8 0 ppxss 1248 156 0 156 37 36 1 1 0 8 1 pfstscr 40 159 0 159 15 15 0 1 0 8 0 pffrag 232 145 0 144 10 9 1 1 0 482 0 pffrnode 88 145 0 144 10 9 1 1 0 8 0 pffrent 40 1078 0 1077 13 12 1 1 0 8 0 pfosfp 40 1447 0 1020 5 0 5 5 0 8 0 pfosfpen 112 1447 0 718 21 0 21 21 0 8 0 pfrktable 1344 1861 943 1858 8 7 1 2 0 8 0 pftag 88 144 0 129 1 0 1 1 0 8 0 pfqueue 264 161 0 161 9 9 0 1 0 8 0 pfstitem 24 53 0 51 1 0 1 1 0 8 0 pfstkey 112 538 0 536 1 0 1 1 0 8 0 pfstate 320 289 0 287 2 1 1 2 0 8 0 pfrule 1360 2759 0 2735 19 17 2 5 0 8 0 art_heap8 4096 4 0 3 4 3 1 3 0 8 0 art_heap4 256 7856 0 7448 85 56 29 31 0 8 0 art_table 32 7860 0 7451 5 1 4 4 0 8 0 art_node 16 1907 0 1829 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 543 0 522 1 0 1 1 0 8 0 shmpl 112 144 0 16 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 41506 0 39976 96 0 96 96 0 8 0 ffsino 272 41506 0 39976 103 0 103 103 0 8 0 nchpl 144 81169 0 79539 63 0 63 63 0 8 0 uvmvnodes 80 7516 0 0 154 0 154 154 0 8 0 vnodes 224 7516 0 0 443 0 443 443 0 8 0 namei 1024 295540 0 295540 9 8 1 2 0 8 1 percpumem 16 425 0 385 1 0 1 1 0 8 0 vcpupl 2048 464 0 1 58 0 58 58 0 8 0 vmpool 560 513 0 50 34 0 34 34 0 8 0 pfiaddrpl 120 891 0 890 6 5 1 1 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 238485 0 238485 28 27 1 8 0 8 1 plimitpl 152 4336 0 4321 1 0 1 1 0 8 0 sigapl 424 29883 0 29831 9 2 7 8 0 8 0 futexpl 64 294607 0 294605 3 2 1 1 0 8 0 knotepl 120 1863 0 0 17 0 17 17 0 8 0 kqueuepl 216 17389 0 17377 265 260 5 8 0 8 4 pipepl 336 5448 0 5420 170 167 3 8 0 8 0 fdescpl 496 29775 0 29747 11 7 4 5 0 8 0 filepl 152 226651 0 226403 392 374 18 23 0 8 6 lockfpl 104 8166 0 8164 12 11 1 2 0 8 0 lockfspl 48 2673 0 2671 1 0 1 1 0 8 0 sessionpl 144 151 0 134 1 0 1 1 0 8 0 pgrppl 48 398 0 381 1 0 1 1 0 8 0 ucredpl 96 26372 0 26360 1 0 1 1 0 8 0 zombiepl 144 29833 0 29831 6 5 1 1 0 8 0 processpl 1064 29883 0 29831 5 0 5 5 0 8 0 procpl 672 75597 0 75534 42 34 8 9 0 8 0 srpgc 96 150 0 150 38 37 1 1 0 8 1 sosppl 168 187 0 187 37 37 0 1 0 8 0 sockpl 480 69649 0 69624 1278 1249 29 37 0 8 25 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 1 2 3 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 460 0 0 23 3 20 21 0 8 0 mtagpl 96 1520 0 0 13 0 13 13 0 8 0 mbufpl 256 2861 0 0 116 1 115 115 0 8 0 bufpl 288 47062 0 39546 537 0 537 537 0 8 0 anonpl 24 9617836 0 9596643 567 409 158 185 0 186 5 amapchunkpl 152 947946 0 947146 1840 1801 39 663 0 158 2 amappl16 200 158418 0 157625 461 406 55 68 0 8 6 amappl15 192 4688 0 4682 1 0 1 1 0 8 0 amappl14 184 3804 0 3798 1 0 1 1 0 8 0 amappl13 176 7441 0 7437 1 0 1 1 0 8 0 amappl12 168 3511 0 3491 1 0 1 1 0 8 0 amappl11 160 1841 0 1827 1 0 1 1 0 8 0 amappl10 152 3812 0 3802 1 0 1 1 0 8 0 amappl9 144 3196 0 3187 1 0 1 1 0 8 0 amappl8 136 6976 0 6814 7 1 6 6 0 8 0 amappl7 128 4068 0 4057 1 0 1 1 0 8 0 amappl6 120 3353 0 3323 2 1 1 2 0 8 0 amappl5 112 26524 0 26506 1 0 1 1 0 8 0 amappl4 104 8315 0 8273 5 3 2 2 0 8 0 amappl3 96 8289 0 8268 1 0 1 1 0 8 0 amappl2 88 11291 0 11215 3 1 2 3 0 8 0 amappl1 80 526264 0 525721 22 8 14 19 0 8 0 amappl 88 359414 0 359039 10 0 10 10 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 72 146 0 16 3 0 3 3 0 8 0 uaddrrnd 24 30288 0 29797 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 30288 0 29797 3 0 3 3 0 8 0 vmmpekpl 168 188293 0 188176 7 1 6 6 0 8 0 vmmpepl 168 2802246 0 2798665 663 479 184 213 0 357 0 vmsppl 368 30287 0 29797 47 2 45 45 0 8 0 rwobjpl 56 713945 0 704263 178 36 142 142 0 8 2 pdppl 4096 60583 0 60057 1922 1390 532 533 0 8 6 pvpl 32 15408198 0 15384117 910 667 243 281 0 265 16 pmappl 248 30287 0 29797 34 3 31 31 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 4022 0 2448 45 0 45 45 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pf_anchor_global_RB_REMOVE(ffffffff82b89cd8,ffff800000e89000) at pf_anchor_global_RB_REMOVE+0x58 sys/net/pf_ruleset.c:84 pf_remove_if_empty_ruleset(ffff800000e89490) at pf_remove_if_empty_ruleset+0xdd sys/net/pf_ruleset.c:300 pfi_dynaddr_setup(ffff800000ed5828,0) at pfi_dynaddr_setup+0x411 sys/net/pf_if.c:485 pfioctl(4900,cd60441a,ffff800000be8000,3,ffff800021220000) at pfioctl+0x8e11 pf_addr_setup sys/net/pf_ioctl.c:893 [inline] pfioctl(4900,cd60441a,ffff800000be8000,3,ffff800021220000) at pfioctl+0x8e11 sys/net/pf_ioctl.c:1652 VOP_IOCTL(fffffd806f605d48,cd60441a,ffff800000be8000,3,fffffd807f7d81e0,ffff800021220000) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd805bb9dda8,cd60441a,ffff800000be8000,ffff800021220000) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021220000,ffff80002e3f7b28,ffff80002e3f7b80) at sys_ioctl+0x4a2 syscall(ffff80002e3f7bf0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3f7bf0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb52bfbb27a0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020ce8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5