panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x5ac4c416000, opte 0xffffffffffffffff Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *216424 27021 0 0x14000 0x200 1 reaper 487742 42322 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306eb35) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806bf0e200,fffffd8007971e60,7f82d6262070,5ac4c40e000,5ac4c512000,0) at pmap_remove_pte pmap_do_remove(fffffd806bf0e200,5ac4c40e000,5ac4c512000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 uvm_unmap_kill_entry_withlock(fffffd806bcfea50,fffffd806c3fac18,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 uvm_map_teardown(fffffd806bcfea50) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 uvmspace_free(fffffd806bcfea50) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: 7 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x5ac4c416000, opte 0xffffffffffffffff ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306eb35) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806bf0e200,fffffd8007971e60,7f82d6262070,5ac4c40e000,5ac4c512000,0) at pmap_remove_pte pmap_do_remove(fffffd806bf0e200,5ac4c40e000,5ac4c512000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 uvm_unmap_kill_entry_withlock(fffffd806bcfea50,fffffd806c3fac18,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 uvm_map_teardown(fffffd806bcfea50) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 uvmspace_free(fffffd806bcfea50) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800029fe56f0 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff800029fd91c0 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x32183547ab30dc79 r11 0xd233f5073f9a6551 r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff816cefe5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800029fe56e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) tid=216424 pid=27021 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=4, usrpri=76, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fd9448,0xffff800029fd8a38 process=0xffff800029feb188 user=0xffff800029fe0000, vmspace=0xffffffff834f9210 estcpu=26, cpticks=4, pctcpu=8.99, user=0, sys=10923, intr=30 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49360 168540 23676 0 2 0x8000000 syz-executor 49360 232840 23676 0 2 0xc000080 syz-executor 44176 20383 11308 0 2 0x8000002 sh 99235 177171 37894 0 2 0x8000000 syz-executor 99235 43806 37894 0 3 0xc000080 fsleep syz-executor 6813 70125 18770 0 2 0x8000000 syz-executor 6813 475158 18770 0 3 0xc000080 fsleep syz-executor 98535 47912 62883 0 2 0x8000000 syz-executor 98535 196216 62883 0 3 0xc000080 fsleep syz-executor 98535 232190 62883 0 3 0xc000080 fsleep syz-executor 98535 458826 62883 0 2 0xc000000 syz-executor 9923 491421 52707 0 2 0x8000000 syz-executor 9923 71629 52707 0 3 0xc000080 fsleep syz-executor 9923 146616 52707 0 3 0xc000080 fsleep syz-executor 33432 448355 46041 0 2 0x8000480 syz-executor 33432 468760 46041 0 3 0xc000080 piperd syz-executor 11308 116036 99279 0 3 0x8000082 wait syz-executor 15777 118502 0 0 3 0x14200 acct acct 22144 77760 99279 0 2 0x8000482 syz-executor 23676 449718 99279 0 2 0x8000482 syz-executor 18770 89221 99279 0 2 0x8000482 syz-executor 52707 435512 99279 0 2 0x8000482 syz-executor 46041 104569 99279 0 3 0x8000082 nanoslp syz-executor 62883 473480 99279 0 3 0x8000082 nanoslp syz-executor 37894 186680 99279 0 2 0x8000482 syz-executor 78355 466556 0 0 3 0x14280 nfsidl nfsio 61432 189893 0 0 3 0x14280 nfsidl nfsio 86201 429901 0 0 3 0x14280 nfsidl nfsio 98556 47268 0 0 3 0x14280 nfsidl nfsio 86940 416591 0 0 3 0x14280 nfsidl nfsio 58089 425457 0 0 3 0x14280 nfsidl nfsio 96207 261043 0 0 3 0x14280 nfsidl nfsio 47279 186491 0 0 3 0x14280 nfsidl nfsio 31109 339202 0 0 3 0x14280 nfsidl nfsio 64494 451057 0 0 3 0x14280 nfsidl nfsio 54209 515201 0 0 3 0x14280 nfsidl nfsio 94305 308873 0 0 3 0x14280 nfsidl nfsio 70679 479211 0 0 3 0x14280 nfsidl nfsio 48357 320296 0 0 3 0x14280 nfsidl nfsio 81879 473024 0 0 3 0x14280 nfsidl nfsio 35948 445989 0 0 3 0x14280 nfsidl nfsio 16667 347351 0 0 3 0x14280 nfsidl nfsio 53312 354550 0 0 3 0x14280 nfsidl nfsio 85178 231124 0 0 3 0x14280 nfsidl nfsio 308 512959 0 0 3 0x14280 nfsidl nfsio 53827 367493 1 0 3 0x18100083 ttyin getty 85259 172994 0 0 3 0x14200 bored sosplice 99279 270084 98531 0 3 0x8000082 kqread syz-executor 98531 113166 72596 0 3 0x810008a sigsusp ksh 72596 229414 69415 0 3 0x18000098 kqread sshd-session 69415 243050 10481 0 3 0x18000092 kqread sshd-session 10481 130863 1 0 3 0x18000088 kqread sshd 65033 400452 66640 74 3 0x19100092 bpf pflogd 66640 388121 1 0 3 0x18000080 sbwait pflogd 39735 80914 3874 73 3 0x19100090 kqread syslogd 3874 69302 1 0 3 0x18100082 sbwait syslogd 27163 159152 1 0 3 0x18100080 kqread resolvd 39129 114482 38284 77 3 0x18100092 kqread dhcpleased 25298 408817 38284 77 3 0x18100092 kqread dhcpleased 38284 70481 1 0 3 0x18000080 kqread dhcpleased 90629 122029 0 0 3 0x14200 bored smr 80738 242648 0 0 2 0x14200 zerothread 9604 203166 0 0 3 0x14200 aiodoned aiodoned 190 96147 0 0 3 0x14200 syncer update 96287 454343 0 0 3 0x14200 cleaner cleaner *27021 216424 0 0 7 0x14200 reaper 1592 71200 0 0 3 0x14200 pgdaemon pagedaemon 5204 292013 0 0 3 0x14200 bored viomb 91240 206917 0 0 3 0x40014200 acpi0 acpi0 84929 485824 0 0 3 0x40014200 idle1 18191 84900 0 0 3 0x14200 bored softnet3 66658 239178 0 0 3 0x14200 bored softnet2 33052 394741 0 0 3 0x14200 bored softnet1 83703 306374 0 0 3 0x14200 bored softnet0 74579 462868 0 0 3 0x14200 bored systqmp 36364 506811 0 0 3 0x14200 bored systq 76500 4798 0 0 3 0x14200 tmoslp softclockmp 42322 487742 0 0 7 0x40014200 softclock 29617 164307 0 0 3 0x40014200 idle0 1 232214 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bf0e210) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1813 #4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 #5 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 #6 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #7 reaper+0x25b sys/kern/kern_exit.c:480 #8 proc_trampoline+0x10 Process 27021 (reaper) thread 0xffff800029fd91c0 (216424) exclusive rwlock vmmaplk r = 0 (0xfffffd806bcfeb40) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5277 #3 uvm_map_teardown+0x104 sys/uvm/uvm_map.c:2488 #4 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #5 reaper+0x25b sys/kern/kern_exit.c:480 #6 proc_trampoline+0x10 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bf0e210) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1813 #4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 #5 uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 #6 uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 #7 reaper+0x25b sys/kern/kern_exit.c:480 #8 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 10371K 10687K 166960K 15506 0 pcb 17 19K 21K 166960K 592 0 rtable 205 8K 9K 166960K 2575 0 pf 34 9K 10K 166960K 248 0 ifaddr 44 16K 17K 166960K 346 0 ifgroup 59 2K 2K 166960K 414 0 sysctl 4 1K 2K 166960K 11 0 counters 66 36K 37K 166960K 262 0 ioctlops 0 0K 4K 166960K 1844 0 iov 0 0K 16K 166960K 198 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1551 97K 98K 166960K 4811 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 47 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 264 0 dirhash 15 2K 3K 166960K 75 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 93K 166960K 2891 0 sigio 0 0K 0K 166960K 35 0 proc 70 91K 128K 166960K 2469 0 subproc 104 6K 7K 166960K 936 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 348 0 in_multi 89 6K 7K 166960K 848 0 ether_multi 1 0K 0K 166960K 19 0 mrt 1 0K 0K 166960K 4 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 1594 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 261 74K 96K 166960K 25668 0 UVM aobj 88 13K 13K 166960K 94 0 pinsyscall 42 84K 108K 166960K 5622 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 1K 166960K 179 0 NDP 13 0K 1K 166960K 251 0 temp 78 6816K 7312K 166960K 93765 0 kqueue 14 22K 31K 166960K 325 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 622 0 619 6 3 3 3 0 8 2 rtentry 112 869 0 778 4 1 3 4 0 8 0 unpcb 144 3330 0 3311 32 26 6 7 0 8 5 syncache 336 5 0 5 3 3 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 1276 0 1271 51 47 4 14 0 8 3 arp 120 161 0 142 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 384 4503 0 4492 69 60 9 17 0 8 7 nd6 136 235 0 214 1 0 1 1 0 8 0 pkpcb 40 7 0 7 4 4 0 1 0 8 0 kcovpl 48 72 0 64 1 0 1 1 0 8 0 ppxss 1168 24 0 24 10 9 1 1 0 8 1 pffrag 232 35 0 32 1 0 1 1 0 482 0 pffrnode 88 34 0 31 1 0 1 1 0 8 0 pffrent 40 106 0 103 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 pfstitem 24 222 0 179 1 0 1 1 0 8 0 pfstkey 128 222 0 179 2 0 2 2 0 8 0 pfstate 376 222 0 179 7 2 5 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3350 0 2950 37 9 28 30 0 8 3 art_table 32 3351 0 2950 4 0 4 4 0 8 0 art_node 16 862 0 780 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 261 0 251 1 0 1 1 0 8 0 shmpl 112 91 0 6 3 0 3 3 0 8 0 dirhash 1024 60 0 41 3 0 3 3 0 8 0 dino2pl 256 5682 0 4055 102 0 102 102 0 8 0 ffsino 272 5682 0 4055 109 0 109 109 0 8 0 nchpl 144 8783 0 6985 67 0 67 67 0 8 0 uvmvnodes 80 7422 0 0 152 0 152 152 0 8 0 vnodes 216 7422 0 0 413 0 413 413 0 8 0 namei 1024 41743 0 41743 7 6 1 2 0 8 1 percpumem 16 145 0 98 1 0 1 1 0 8 0 vcpupl 3904 9 0 2 1 0 1 1 0 8 0 vmpool 696 14 0 7 1 0 1 1 0 8 0 kstatmem 264 222 0 196 7 4 3 3 0 8 0 scsiplug 72 4 0 4 4 3 1 1 0 8 1 scxspl 216 50346 0 50346 17 14 3 8 1 8 3 plimitpl 152 1129 0 1112 1 0 1 1 0 8 0 sigapl 424 3091 0 3019 9 0 9 9 0 8 0 futexpl 64 36194 0 36188 5 4 1 1 0 8 0 knotepl 120 722 0 0 18 0 18 18 0 8 0 kqueuepl 216 837 0 826 9 8 1 5 0 8 0 pipepl 320 652 0 624 8 5 3 8 0 8 0 fdescpl 496 3047 0 3016 7 2 5 5 0 8 0 filepl 152 26696 0 26443 58 41 17 20 0 8 7 lockfpl 104 899 0 895 1 0 1 1 0 8 0 lockfspl 48 334 0 330 1 0 1 1 0 8 0 sessionpl 144 87 0 78 1 0 1 1 0 8 0 pgrppl 48 182 0 165 1 0 1 1 0 8 0 ucredpl 104 4997 0 4984 1 0 1 1 0 8 0 zombiepl 144 3020 0 3019 1 0 1 1 0 8 0 processpl 1152 3091 0 3019 8 2 6 6 0 8 0 procpl 648 6520 0 6439 11 2 9 9 0 8 1 srpgc 96 20 0 20 5 4 1 1 0 8 1 sosppl 168 10 0 10 6 5 1 1 0 8 1 sockpl 664 8482 0 8451 112 101 11 23 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 254 0 0 27 0 27 27 0 8 0 mtagpl 96 71 0 0 2 0 2 2 0 8 0 mbufpl 256 840 0 0 44 0 44 44 0 8 0 bufpl 280 12904 0 5480 531 0 531 531 0 8 0 anonpl 24 371545 0 364992 131 44 87 91 0 185 25 amapchunkpl 152 81470 0 80841 65 32 33 38 0 158 8 amappl16 200 5860 0 5746 47 33 14 23 0 8 4 amappl15 192 4 0 4 2 1 1 1 0 8 1 amappl14 184 243 0 231 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 4718 0 4685 3 1 2 3 0 8 0 amappl11 160 67 0 53 1 0 1 1 0 8 0 amappl10 152 12 0 11 1 0 1 1 0 8 0 amappl9 144 226 0 226 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 242 0 229 1 0 1 1 0 8 0 amappl6 120 795 0 793 1 0 1 1 0 8 0 amappl5 112 458 0 446 1 0 1 1 0 8 0 amappl4 104 507 0 486 1 0 1 1 0 8 0 amappl3 96 16228 0 16102 4 0 4 4 0 8 0 amappl2 88 1490 0 1424 2 0 2 2 0 8 0 amappl1 80 19800 0 19210 17 3 14 16 0 8 0 amappl 88 24674 0 24481 5 0 5 5 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 93 0 6 2 0 2 2 0 8 0 uaddrrnd 24 3061 0 3023 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3061 0 3023 1 0 1 1 0 8 0 vmmpekpl 168 26902 0 26835 4 0 4 4 0 8 0 vmmpepl 168 193139 0 191107 132 32 100 105 0 357 9 vmsppl 440 3060 0 3022 5 0 5 5 0 8 0 rwobjpl 56 56958 0 48371 126 2 124 125 0 8 0 pdppl 4096 6129 0 6051 221 142 79 85 0 8 1 pvpl 32 34409 0 0 276 0 276 276 0 265 0 pmappl 248 3060 0 3022 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 622 0 218 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8343eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834f4f28,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x229 sys/kern/kern_synch.c:416 msleep(ffffffff835ac330,ffffffff834ab120,0,ffffffff830d773d,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000ffffef30) at softclock_thread+0x11f sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff8343eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834f4f28) at __mp_lock+0x199 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff834f4f28,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x229 sys/kern/kern_synch.c:416 msleep(ffffffff835ac330,ffffffff834ab120,0,ffffffff830d773d,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000ffffef30) at softclock_thread+0x11f sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306eb35) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806bf0e200,fffffd8007971e60,7f82d6262070,5ac4c40e000,5ac4c512000,0) at pmap_remove_pte pmap_do_remove(fffffd806bf0e200,5ac4c40e000,5ac4c512000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 uvm_unmap_kill_entry_withlock(fffffd806bcfea50,fffffd806c3fac18,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 uvm_map_teardown(fffffd806bcfea50) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 uvmspace_free(fffffd806bcfea50) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8306eb35) at panic+0x1e5 sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806bf0e200,fffffd8007971e60,7f82d6262070,5ac4c40e000,5ac4c512000,0) at pmap_remove_pte pmap_do_remove(fffffd806bf0e200,5ac4c40e000,5ac4c512000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 uvm_unmap_kill_entry_withlock(fffffd806bcfea50,fffffd806c3fac18,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 uvm_map_teardown(fffffd806bcfea50) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 uvmspace_free(fffffd806bcfea50) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: -8