panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0xc443da60000, opte 0x70003efff Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *294287 83118 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828ead08) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd807f001d90,fffffd8007898a00,7f86221ed0f8,c443da1f000,c443dc00000,0,4f8e65844cd05705) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd807f001d90,c443da1f000,c443dc1e000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd8069544528,fffffd8066975d80,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd8069544528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 reaper(ffff80002a149488) at reaper+0x197 sys/kern/kern_exit.c:463 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 0xc443da60000, opte 0x70003efff ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828ead08) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd807f001d90,fffffd8007898a00,7f86221ed0f8,c443da1f000,c443dc00000,0,4f8e65844cd05705) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd807f001d90,c443da1f000,c443dc1e000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd8069544528,fffffd8066975d80,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd8069544528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 reaper(ffff80002a149488) at reaper+0x197 sys/kern/kern_exit.c:463 end trace frame: 0x0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a155770 rbx 0xffff800029ceccdf rdx 0 rcx 0xffff80002a149488 rax 0xffff800029cebff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3fa18a07de44cef2 r11 0x1fb30de5a92422ab r12 0xffff800029cecae0 r13 0 r14 0 r15 0x1 rip 0xffffffff82583c5c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a155760 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) tid=294287 pid=83118 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=4, usrpri=84, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a1499a8,0xffff80002a149208 process=0xffff80002a15b0d8 user=0xffff80002a150000, vmspace=0xffffffff82e60988 estcpu=34, cpticks=3, pctcpu=22.6, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94485 390510 69633 0 3 0x8000080 nanoslp syz-executor.6 94485 159179 69633 0 3 0xc000080 ttyin syz-executor.6 94485 232796 69633 0 3 0xc000080 fsleep syz-executor.6 16674 262920 84429 0 3 0x8000080 nanoslp syz-executor.4 16674 279548 84429 0 3 0xc000080 kqsel syz-executor.4 16674 465408 84429 0 3 0xc000080 fsleep syz-executor.4 89226 112462 81186 0 3 0x8000080 nanoslp syz-executor.7 89226 503356 81186 0 3 0xc000080 kqsel syz-executor.7 89226 36046 81186 0 3 0xc000080 fsleep syz-executor.7 69633 432229 74300 0 3 0x8000082 nanoslp syz-executor.6 74785 442184 74300 0 3 0x8000082 nanoslp syz-executor.0 81186 497301 74300 0 3 0x8000082 nanoslp syz-executor.7 77897 224761 74300 0 3 0x8000082 nanoslp syz-executor.5 29805 455148 74300 0 3 0x8000082 nanoslp syz-executor.1 72551 107134 1 0 3 0x18100083 ttyin getty 52298 119795 74300 0 3 0x8000082 piperd syz-executor.3 79049 416775 0 0 3 0x14200 acct acct 84429 383379 74300 0 3 0x8000082 nanoslp syz-executor.4 2284 193966 0 0 3 0x14280 nfsidl nfsio 12474 113510 0 0 3 0x14280 nfsidl nfsio 39125 338430 0 0 3 0x14280 nfsidl nfsio 33043 370283 0 0 3 0x14280 nfsidl nfsio 90533 20708 0 0 3 0x14280 nfsidl nfsio 33740 238512 0 0 3 0x14280 nfsidl nfsio 58583 246942 0 0 3 0x14280 nfsidl nfsio 84793 148745 0 0 3 0x14280 nfsidl nfsio 90025 434002 0 0 3 0x14280 nfsidl nfsio 3490 295506 0 0 3 0x14280 nfsidl nfsio 6471 44351 0 0 3 0x14280 nfsidl nfsio 8088 425413 0 0 3 0x14280 nfsidl nfsio 54956 111586 0 0 3 0x14280 nfsidl nfsio 42685 206945 0 0 3 0x14280 nfsidl nfsio 90152 89318 0 0 3 0x14280 nfsidl nfsio 94792 230476 0 0 3 0x14280 nfsidl nfsio 42639 27458 0 0 3 0x14280 nfsidl nfsio 83668 493073 0 0 3 0x14280 nfsidl nfsio 14813 192758 0 0 3 0x14280 nfsidl nfsio 81011 75499 0 0 3 0x14280 nfsidl nfsio 63219 484062 0 0 3 0x14200 bored sosplice 47738 62936 55043 0 3 0x18100082 netio arp 55043 10695 1 0 3 0x810008a sigsusp sh 35804 299022 74300 0 3 0x8000082 piperd syz-executor.2 74300 281804 36466 0 3 0x1a000082 wait syz-fuzzer 74300 60502 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 317643 36466 0 3 0x1e000082 wait syz-fuzzer 74300 257851 36466 0 3 0x1e000082 wait syz-fuzzer 74300 332185 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 116768 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 496115 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 209260 36466 0 3 0x1e000082 wait syz-fuzzer 74300 145161 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 407343 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 383575 36466 0 3 0x1e000082 thrsleep syz-fuzzer 74300 481721 36466 0 3 0x1e000082 wait syz-fuzzer 74300 307755 36466 0 3 0x1e000082 wait syz-fuzzer 74300 138141 36466 0 3 0x1e000082 wait syz-fuzzer 74300 99034 36466 0 3 0x1e000082 kqread syz-fuzzer 74300 384469 36466 0 3 0x1e000082 wait syz-fuzzer 36466 186509 31272 0 3 0x810008a sigsusp ksh 31272 38748 8063 0 3 0x1800009a kqread sshd 8063 82909 1 0 3 0x18000088 kqread sshd 16972 238023 96680 74 3 0x19100092 bpf pflogd 96680 155672 1 0 3 0x18000080 sbwait pflogd 82701 495114 699 73 3 0x19100090 kqread syslogd 699 384769 1 0 3 0x18100082 sbwait syslogd 38167 507045 1 0 3 0x18100080 kqread resolvd 35384 37432 0 0 3 0x14200 bored smr 92974 157430 0 0 3 0x14200 pgzero zerothread 40865 334494 0 0 3 0x14200 aiodoned aiodoned 41296 471980 0 0 3 0x14200 syncer update 93411 475604 0 0 3 0x14200 cleaner cleaner *83118 294287 0 0 7 0x14200 reaper 38672 469337 0 0 3 0x14200 pgdaemon pagedaemon 46917 324273 0 0 3 0x14200 bored viomb 68157 183644 0 0 3 0x40014200 acpi0 acpi0 29973 289654 0 0 3 0x40014200 idle1 86185 101689 0 0 3 0x14200 bored softnet3 89864 351894 0 0 3 0x14200 bored softnet2 86310 354395 0 0 3 0x14200 bored softnet1 57550 168763 0 0 3 0x14200 bored softnet0 86539 443529 0 0 3 0x14200 bored systqmp 85728 472000 0 0 3 0x14200 bored systq 32363 53301 0 0 3 0x14200 tmoslp softclockmp 84149 271810 0 0 3 0x40014200 tmoslp softclock 64307 34184 0 0 7 0x40014200 idle0 1 43850 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 (0xfffffd807f001da0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x99 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x99 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:425 [inline] #3 pmap_do_remove+0x99 sys/arch/amd64/amd64/pmap.c:1800 #4 uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 #5 uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 #7 reaper+0x197 sys/kern/kern_exit.c:463 #8 proc_trampoline+0x10 Process 83118 (reaper) thread 0xffff80002a149488 (294287) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10181 6503K 6734K 166960K 12194 0 pcb 17 13K 13K 166960K 379 0 rtable 168 5K 7K 166960K 1400 0 pf 29 9K 10K 166960K 136 0 ifaddr 34 13K 15K 166960K 172 0 ifgroup 50 2K 2K 166960K 222 0 sysctl 4 1K 1K 166960K 7 0 counters 60 35K 36K 166960K 150 0 ioctlops 0 0K 4K 166960K 1637 0 iov 0 0K 16K 166960K 193 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1382 87K 87K 166960K 2870 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 81 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 199 0 dirhash 12 2K 3K 166960K 69 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 86K 166960K 3121 0 sigio 0 0K 0K 166960K 74 0 proc 69 79K 128K 166960K 1509 0 subproc 117 7K 7K 166960K 448 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 490 0 in_multi 68 5K 7K 166960K 465 0 ether_multi 1 0K 0K 166960K 21 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 1071 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 338 202K 220K 166960K 29199 0 UVM aobj 131 4K 4K 166960K 161 0 pinsyscall 36 72K 108K 166960K 5024 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 274 0 NDP 10 0K 1K 166960K 121 0 temp 76 6816K 6943K 166960K 91332 0 kqueue 6 10K 29K 166960K 458 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 120 342 0 340 1 0 1 1 0 8 0 rtentry 112 469 0 396 4 0 4 4 0 8 0 unpcb 144 2261 0 2253 7 5 2 2 0 8 1 syncache 336 20 0 20 7 6 1 1 0 8 1 tcpqe 32 110 0 110 6 6 0 1 0 8 0 tcpcb 808 1093 0 1087 20 18 2 8 0 8 1 arp 120 99 0 86 1 0 1 1 0 8 0 inpcb 392 3343 0 3336 31 28 3 12 0 8 1 nd6 136 109 0 93 1 0 1 1 0 8 0 pkpcb 40 18 0 18 11 11 0 1 0 8 0 kcovpl 48 34 0 25 1 0 1 1 0 8 0 ppxss 1168 8 0 8 6 5 1 1 0 8 1 pffrag 232 17 0 15 1 0 1 1 0 482 0 pffrnode 88 16 0 14 1 0 1 1 0 8 0 pffrent 40 151 0 149 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 24 215 0 171 1 0 1 1 0 8 0 pfstkey 128 215 0 171 2 0 2 2 0 8 0 pfstate 376 215 0 171 6 1 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1722 0 1369 39 10 29 29 0 8 4 art_table 32 1724 0 1369 4 0 4 4 0 8 0 art_node 16 458 0 393 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 3 2 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 194 0 184 1 0 1 1 0 8 0 shmpl 112 158 0 30 5 1 4 4 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 6535 0 5000 97 0 97 97 0 8 0 ffsino 272 6535 0 5000 104 1 103 103 0 8 0 nchpl 144 11157 0 9409 67 0 67 67 0 8 0 uvmvnodes 80 7284 0 0 149 0 149 149 0 8 0 vnodes 216 7284 0 0 405 0 405 405 0 8 0 namei 1024 37455 0 37455 9 8 1 2 0 8 1 percpumem 16 89 0 45 1 0 1 1 0 8 0 vcpupl 3904 14 0 1 2 0 2 2 0 8 0 vmpool 696 18 0 5 2 0 2 2 0 8 0 kstatmem 264 110 0 90 2 0 2 2 0 8 0 scsiplug 72 11 0 11 6 5 1 1 0 8 1 scxspl 216 66051 0 66051 19 16 3 8 1 8 3 plimitpl 152 415 0 396 1 0 1 1 0 8 0 sigapl 424 3416 0 3348 10 1 9 9 0 8 0 futexpl 64 44295 0 44292 6 5 1 1 0 8 0 knotepl 120 654 0 0 18 0 18 18 0 8 0 kqueuepl 216 882 0 874 3 2 1 3 0 8 0 pipepl 320 681 0 649 13 9 4 8 0 8 1 fdescpl 496 3376 0 3349 5 0 5 5 0 8 0 filepl 152 21055 0 20801 29 17 12 16 0 8 0 lockfpl 104 807 0 806 1 0 1 1 0 8 0 lockfspl 48 342 0 341 1 0 1 1 0 8 0 sessionpl 144 53 0 36 1 0 1 1 0 8 0 pgrppl 48 94 0 77 1 0 1 1 0 8 0 ucredpl 104 3617 0 3607 1 0 1 1 0 8 0 zombiepl 144 3351 0 3348 5 4 1 1 0 8 0 processpl 1136 3416 0 3348 6 0 6 6 0 8 0 procpl 656 6749 0 6659 10 1 9 9 0 8 0 srpgc 96 22 0 22 6 5 1 1 0 8 1 sosppl 168 73 0 73 12 11 1 1 0 8 1 sockpl 664 6009 0 5993 28 24 4 11 0 8 1 mcl64k 65536 17 0 0 3 0 3 3 0 8 1 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 399 0 0 39 3 36 39 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1172 0 0 64 0 64 64 0 8 0 bufpl 280 13944 0 6174 556 0 556 556 0 8 0 anonpl 24 564456 0 558423 123 35 88 97 0 186 17 amapchunkpl 152 94901 0 94219 89 49 40 41 0 158 8 amappl16 200 13403 0 13281 77 58 19 22 0 8 4 amappl15 192 27 0 27 2 2 0 1 0 8 0 amappl14 184 247 0 233 2 1 1 2 0 8 0 amappl13 176 13 0 13 1 1 0 1 0 8 0 amappl12 168 4515 0 4479 3 1 2 2 0 8 0 amappl11 160 77 0 67 1 0 1 1 0 8 0 amappl10 152 89 0 76 2 1 1 1 0 8 0 amappl9 144 191 0 191 7 6 1 1 0 8 1 amappl8 136 600 0 495 5 0 5 5 0 8 0 amappl7 128 65 0 50 1 0 1 1 0 8 0 amappl6 120 731 0 704 2 1 1 2 0 8 0 amappl5 112 341 0 328 1 0 1 1 0 8 0 amappl4 104 877 0 830 2 0 2 2 0 8 0 amappl3 96 18222 0 18137 3 0 3 3 0 8 0 amappl2 88 4047 0 3980 5 3 2 4 0 8 0 amappl1 80 22459 0 21973 23 10 13 23 0 8 0 amappl 88 28090 0 27881 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 72 160 0 30 3 0 3 3 0 8 0 uaddrrnd 24 3395 0 3355 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3395 0 3355 1 0 1 1 0 8 0 vmmpekpl 168 27254 0 27185 5 1 4 4 0 8 0 vmmpepl 168 228272 0 226305 186 79 107 118 0 357 0 vmsppl 440 3394 0 3354 9 3 6 6 0 8 0 rwobjpl 56 67612 0 59026 132 10 122 122 0 8 0 pdppl 4096 6797 0 6721 285 205 80 88 0 8 4 pvpl 32 45373 0 0 368 2 366 366 0 265 0 pmappl 248 3394 0 3354 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 689 0 258 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82cf2ff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82cf2ff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff82cf2ff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x2f1 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffffffff82cf2ff0) at sched_idle+0x41d sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828ead08) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd807f001d90,fffffd8007898a00,7f86221ed0f8,c443da1f000,c443dc00000,0,4f8e65844cd05705) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd807f001d90,c443da1f000,c443dc1e000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd8069544528,fffffd8066975d80,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd8069544528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 reaper(ffff80002a149488) at reaper+0x197 sys/kern/kern_exit.c:463 end trace frame: 0x0, count: 7 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828ead08) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd807f001d90,fffffd8007898a00,7f86221ed0f8,c443da1f000,c443dc00000,0,4f8e65844cd05705) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd807f001d90,c443da1f000,c443dc1e000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd8069544528,fffffd8066975d80,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8069544528) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd8069544528) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 reaper(ffff80002a149488) at reaper+0x197 sys/kern/kern_exit.c:463 end trace frame: 0x0, count: -8