panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x7677b9a16000, opte 0xffffffffffffffff Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343c74f) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806c93e800,fffffd8008953c88,7fbb3bdcd000,7677b9a00000,7677b9aa9000,0) at pmap_remove_pte pmap_do_remove(fffffd806c93e800,7677b93a9000,7677b9aa9000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd80786053f8,fffffd806caf17e8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 exit1(ffff80003c48ba20,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c48ba20,ffff80002a380d80,ffff80002a380cd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a380d80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a380d80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7677b9ba8b80, count: 5 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: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x7677b9a16000, opte 0xffffffffffffffff ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343c74f) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806c93e800,fffffd8008953c88,7fbb3bdcd000,7677b9a00000,7677b9aa9000,0) at pmap_remove_pte pmap_do_remove(fffffd806c93e800,7677b93a9000,7677b9aa9000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd80786053f8,fffffd806caf17e8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 exit1(ffff80003c48ba20,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c48ba20,ffff80002a380d80,ffff80002a380cd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a380d80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a380d80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7677b9ba8b80, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a380930 rbx 0xffffffff8388de07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff80003c48ba20 rax 0xffffffff8388cff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x219a6e094cced195 r11 0x16ace616fdb0710 r12 0xffffffff8388dc08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff825bde75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a380920 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=54534 pid=19205 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c48ba20 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c4a0a98,0xffff80003c48b500 process=0xffff8000fffd9838 user=0xffff80002a37b000, vmspace=0xfffffd80786053f8 estcpu=36, cpticks=39, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89662 467191 41042 0 2 0 syz-executor 89662 170052 41042 0 3 0x4000080 fifow syz-executor 89662 104365 41042 0 3 0x4000080 fsleep syz-executor 25427 203319 68490 0 2 0 syz-executor 25427 290359 68490 0 3 0x4000080 fsleep syz-executor 64894 209867 62751 0 2 0 syz-executor 64894 145187 62751 0 3 0x4000080 fsleep syz-executor 49859 395210 34552 0 2 0x10 syz-executor 49859 347449 34552 0 3 0x4000090 fsleep syz-executor 33138 83894 16589 0 3 0x80 nanoslp syz-executor 33138 77009 16589 0 3 0x4000080 kqsel syz-executor 33138 60666 16589 0 3 0x4000080 fsleep syz-executor 33138 11258 16589 0 3 0x4000080 fsleep syz-executor 33138 276600 16589 0 3 0x4000080 fsleep syz-executor 33138 411873 16589 0 3 0x4000080 fsleep syz-executor 33138 116884 16589 0 3 0x4000080 fsleep syz-executor 33138 247836 16589 0 3 0x4000080 fsleep syz-executor 79109 196942 649 0 2 0x4000000 syz-executor 79109 358437 649 0 3 0x4000080 fsleep syz-executor 79109 249600 649 0 3 0x4000080 fsleep syz-executor 79109 22383 649 0 3 0x4000080 fsleep syz-executor 79109 474864 649 0 3 0x4000080 fsleep syz-executor 41042 424032 37044 0 3 0x82 nanoslp syz-executor 16589 34453 37044 0 3 0x82 nanoslp syz-executor 93825 62945 0 0 3 0x14200 acct acct 77307 249909 37044 0 3 0x82 nanoslp syz-executor 62751 112850 37044 0 3 0x82 nanoslp syz-executor 83195 424855 0 0 3 0x14280 nfsidl nfsio 31709 173640 0 0 3 0x14280 nfsidl nfsio 44341 339441 0 0 3 0x14280 nfsidl nfsio 64879 375460 0 0 3 0x14280 nfsidl nfsio 62281 316175 0 0 3 0x14280 nfsidl nfsio 52840 258996 0 0 3 0x14280 nfsidl nfsio 19279 511360 0 0 3 0x14280 nfsidl nfsio 44478 308475 0 0 3 0x14280 nfsidl nfsio 17291 365989 0 0 3 0x14280 nfsidl nfsio 56540 342396 0 0 3 0x14280 nfsidl nfsio 80850 39847 0 0 3 0x14280 nfsidl nfsio 75901 6115 0 0 3 0x14280 nfsidl nfsio 28572 249998 0 0 3 0x14280 nfsidl nfsio 84267 101420 0 0 3 0x14280 nfsidl nfsio 35009 466139 0 0 3 0x14280 nfsidl nfsio 84459 211602 0 0 3 0x14280 nfsidl nfsio 79310 163785 0 0 3 0x14280 nfsidl nfsio 61207 460454 0 0 3 0x14280 nfsidl nfsio 86638 19256 0 0 3 0x14280 nfsidl nfsio 92352 181738 0 0 3 0x14280 nfsidl nfsio 68490 469618 37044 0 3 0x82 nanoslp syz-executor 649 208091 37044 0 3 0x82 nanoslp syz-executor 45935 413270 37044 0 3 0x82 nanoslp syz-executor 34552 102782 37044 0 3 0x82 nanoslp syz-executor 37044 86817 38845 0 3 0x82 kqread syz-executor 38845 277784 23268 0 3 0x10008a sigsusp ksh 23268 399433 31389 0 3 0x98 kqread sshd-session 31389 293073 22390 0 3 0x92 kqread sshd-session 17420 306657 1 0 3 0x100083 ttyopn getty 22390 163123 1 0 3 0x88 kqread sshd 48950 462810 30768 74 3 0x1100092 bpf pflogd 30768 481534 1 0 3 0x80 sbwait pflogd 31633 303118 29734 73 3 0x1100090 kqread syslogd 29734 37925 1 0 3 0x100082 sbwait syslogd 4396 180774 1 0 3 0x100080 kqread resolvd 23789 415548 22313 77 3 0x100092 kqread dhcpleased 46445 77552 22313 77 3 0x100092 kqread dhcpleased 22313 466694 1 0 3 0x80 kqread dhcpleased 7789 65375 0 0 3 0x14200 bored smr 72484 431755 0 0 2 0x14200 zerothread 15645 389146 0 0 3 0x14200 aiodoned aiodoned 14916 282600 0 0 3 0x14200 syncer update 86267 454388 0 0 3 0x14200 cleaner cleaner 55749 139501 0 0 3 0x14200 reaper reaper 58728 293054 0 0 3 0x14200 pgdaemon pagedaemon 7152 240220 0 0 3 0x14200 bored viomb 59154 114086 0 0 3 0x40014200 acpi0 acpi0 19598 412483 0 0 7 0x40014200 idle1 35430 153476 0 0 3 0x14200 bored softnet1 72684 109567 0 0 3 0x14200 bored softnet0 27346 171658 0 0 3 0x14200 bored systqmp 3359 42173 0 0 3 0x14200 bored systq 64907 521307 0 0 3 0x14200 tmoslp softclockmp 35104 209611 0 0 3 0x40014200 tmoslp softclock 51347 389401 0 0 3 0x40014200 idle0 1 123762 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c93e810) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #5 exit1+0x6fc sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 11080K 11634K 166960K 15333 0 pcb 17 15K 30K 166960K 415 0 rtable 291 13K 13K 166960K 797 0 pf 37 18K 82K 166960K 247 0 ifaddr 47 9K 9K 166960K 150 0 ifgroup 59 2K 2K 166960K 239 0 sysctl 4 1K 9K 166960K 84 0 counters 72 37K 38K 166960K 590 0 ioctlops 0 0K 4K 166960K 2009 0 iov 0 0K 16K 166960K 71 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1558 98K 98K 166960K 3507 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 132 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1886 0 sigio 0 0K 0K 166960K 104 0 proc 74 115K 147K 166960K 839 0 subproc 72 4K 4K 166960K 126 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 166 0 in_multi 102 7K 7K 166960K 238 0 ether_multi 3 0K 0K 166960K 21 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 807 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 273 160K 187K 166960K 19040 0 UVM aobj 27 10K 10K 166960K 34 0 pinsyscall 42 84K 104K 166960K 3239 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 136 0 NDP 13 0K 1K 166960K 105 0 temp 87 8680K 8745K 166960K 74589 0 kqueue 13 20K 32K 166960K 319 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 139 0 136 1 0 1 1 0 8 0 rtentry 176 250 0 131 6 0 6 6 0 8 0 unpcb 144 1366 0 1345 7 5 2 4 0 8 1 syncache 336 10 0 10 3 2 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 633 0 626 13 6 7 7 0 8 6 arp 136 51 0 20 2 0 2 2 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 6 0 6 2 2 0 1 0 8 0 inpcb 328 2081 0 2071 19 9 10 10 0 8 8 nd6 152 54 0 23 2 0 2 2 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 1 1 1 0 8 1 ppxss 1192 236 0 236 1 0 1 1 0 8 1 pppxif 1504 42 0 42 1 1 0 1 0 8 0 pffrag 232 49 0 37 1 0 1 1 0 482 0 pffrnode 88 47 0 35 1 0 1 1 0 8 0 pffrent 40 132 0 120 1 0 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 7 0 7 1 1 0 1 0 8 0 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 109 0 23 1 0 1 1 0 8 0 pfstkey 128 111 0 25 3 0 3 3 0 8 0 pfstate 448 110 0 24 10 0 10 10 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 rttmr 136 8 0 8 3 2 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1057 0 551 38 6 32 32 0 8 0 art_table 40 1060 0 551 6 0 6 6 0 8 0 art_node 32 250 0 146 1 0 1 1 0 8 0 sysvmsgpl 40 85 0 77 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 127 0 117 1 0 1 1 0 8 0 shmpl 112 27 0 6 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 4801 0 3287 96 0 96 96 0 8 0 ffsino 296 4801 0 3287 118 1 117 118 0 8 0 nchpl 144 7487 0 6859 64 40 24 64 0 8 0 rtmask 32 18 0 18 2 1 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 25581 0 25581 2 1 1 1 0 8 1 percpumem 16 310 0 259 1 0 1 1 0 8 0 vcpupl 3968 4 0 1 1 0 1 1 0 8 0 vmpool 848 4 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 154 0 124 3 0 3 3 0 8 0 scsiplug 72 6 0 6 1 1 0 1 0 8 0 scxspl 216 37441 0 37441 10 7 3 6 1 8 3 plimitpl 152 565 0 548 1 0 1 1 0 8 0 sigapl 424 2226 0 2157 8 0 8 8 0 8 0 knotepl 120 531 0 0 17 0 17 17 0 8 0 kqueuepl 224 738 0 727 9 7 2 5 0 8 1 pipepl 344 388 0 360 7 1 6 6 0 8 3 fdescpl 528 2185 0 2154 3 0 3 3 0 8 0 filepl 160 14579 0 14356 22 5 17 17 0 8 5 lockfpl 104 1258 0 1255 3 1 2 2 0 8 1 lockfspl 48 455 0 452 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 82 0 65 1 0 1 1 0 8 0 ucredpl 104 2161 0 2147 1 0 1 1 0 8 0 zombiepl 144 2159 0 2157 1 0 1 1 0 8 0 processpl 1232 2226 0 2157 6 0 6 6 0 8 0 procpl 664 5097 0 5012 8 0 8 8 0 8 0 sosppl 176 15 0 15 3 2 1 1 0 8 1 sockpl 752 3707 0 3673 35 18 17 17 0 8 13 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 297 0 0 8 0 8 8 0 8 0 mbufpl 256 487 0 0 31 0 31 31 0 8 0 bufpl 280 14294 0 8158 439 0 439 439 0 8 0 anonpl 32 12816 0 0 104 0 104 104 0 246 0 amapchunkpl 152 64119 0 63523 44 12 32 36 0 158 9 amappl16 200 7420 0 7384 50 32 18 30 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 513 0 512 1 0 1 1 0 8 0 amappl12 168 2612 0 2569 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 31 0 27 1 0 1 1 0 8 0 amappl7 128 111 0 109 1 0 1 1 0 8 0 amappl6 120 383 0 368 1 0 1 1 0 8 0 amappl5 112 87 0 76 1 0 1 1 0 8 0 amappl4 104 515 0 485 1 0 1 1 0 8 0 amappl3 96 12871 0 12744 5 1 4 4 0 8 0 amappl2 88 651 0 589 2 0 2 2 0 8 0 amappl1 80 18624 0 18018 16 1 15 15 0 8 0 amappl 88 17862 0 17666 5 0 5 5 0 92 0 uvmvnodes 80 164 0 0 4 0 4 4 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 2 0 2 1 0 1 1 0 8 1 dma4096 4096 4 0 4 3 3 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 8 0 8 2 2 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 33 0 7 1 0 1 1 0 8 0 uaddrrnd 24 2185 0 2153 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2185 0 2153 1 0 1 1 0 8 0 vmmpekpl 168 18248 0 18194 3 0 3 3 0 8 0 vmmpepl 168 143545 0 141493 123 11 112 112 0 357 15 vmsppl 488 2184 0 2153 6 1 5 5 0 8 0 rwobjpl 80 39232 0 38046 38 3 35 35 0 8 5 pdppl 4096 4385 0 4311 120 45 75 85 0 8 1 pvpl 32 19411 0 0 158 1 157 157 0 265 0 pmappl 256 2188 0 2154 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 356 0 68 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343c74f) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806c93e800,fffffd8008953c88,7fbb3bdcd000,7677b9a00000,7677b9aa9000,0) at pmap_remove_pte pmap_do_remove(fffffd806c93e800,7677b93a9000,7677b9aa9000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd80786053f8,fffffd806caf17e8,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd80786053f8) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 exit1(ffff80003c48ba20,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c48ba20,ffff80002a380d80,ffff80002a380cd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a380d80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a380d80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7677b9ba8b80, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5