panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x20016000, opte 0xffffffffffffffff Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 223763 61734 0 0x8000000 0 1 syz-executor.3 * 56918 48498 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828eb112) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd80686c53f0,fffffd8008193e20,7f8000100098,20013000,20200000,0,34395b74b13b86ac) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd80686c53f0,20013000,21000000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd806b59c6f8,fffffd80695de780,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd806b59c6f8) 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{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 0x20016000, opte 0xffffffffffffffff ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828eb112) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd80686c53f0,fffffd8008193e20,7f8000100098,20013000,20200000,0,34395b74b13b86ac) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd80686c53f0,20013000,21000000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd806b59c6f8,fffffd80695de780,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd806b59c6f8) 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{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a1553f0 rbx 0xffffffff82cc9cbf cpu_info_full_primary+0x2cbf rdx 0 rcx 0xffff80002a149488 rax 0xffffffff82cc8ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa201a742448832c4 r11 0x615c8d2f65dedd9b r12 0xffffffff82cc9ac0 cpu_info_full_primary+0x2ac0 r13 0 r14 0 r15 0x1 rip 0xffffffff820b0acc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a1553e0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) tid=56918 pid=48498 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=4, usrpri=60, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a1499a8,0xffff80002a149208 process=0xffff80002a15a7f8 user=0xffff80002a150000, vmspace=0xffffffff82d83498 estcpu=10, cpticks=7, pctcpu=2.54, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49112 208025 180 0 2 0x8100002 sh 63824 470192 24280 0 2 0x8000000 syz-executor.6 63824 317964 24280 0 3 0xc000080 fsleep syz-executor.6 61734 223763 17425 0 7 0x8000000 syz-executor.3 61734 310755 17425 0 2 0xc000000 syz-executor.3 180 103007 17060 0 3 0x8000082 wait syz-executor.4 8764 284207 78130 0 3 0x8000080 nanoslp syz-executor.7 8764 237066 78130 0 3 0xc000080 netcon syz-executor.7 8764 190949 78130 0 3 0xc000080 fsleep syz-executor.7 25141 363309 29985 0 3 0x8000080 nanoslp syz-executor.2 25141 504730 29985 0 3 0xc000080 sbwait syz-executor.2 25141 474685 29985 0 3 0xc000080 fsleep syz-executor.2 14258 238861 62267 0 3 0x8000080 nanoslp syz-executor.1 14258 89032 62267 0 3 0xc000080 sbwait syz-executor.1 14258 21881 62267 0 3 0xc000080 fsleep syz-executor.1 3506 417750 0 0 3 0x14280 nfsidl nfsio 3354 497678 0 0 3 0x14280 nfsidl nfsio 79105 493107 0 0 3 0x14280 nfsidl nfsio 47486 39820 0 0 3 0x14280 nfsidl nfsio 97907 463389 0 0 3 0x14280 nfsidl nfsio 55951 429520 0 0 3 0x14280 nfsidl nfsio 44363 362208 0 0 3 0x14280 nfsidl nfsio 37681 390913 0 0 3 0x14280 nfsidl nfsio 49809 13869 0 0 3 0x14280 nfsidl nfsio 1347 492333 0 0 3 0x14280 nfsidl nfsio 2151 240976 0 0 3 0x14280 nfsidl nfsio 69668 301608 0 0 3 0x14280 nfsidl nfsio 55179 116043 0 0 3 0x14280 nfsidl nfsio 90132 325632 0 0 3 0x14280 nfsidl nfsio 75118 316936 0 0 3 0x14280 nfsidl nfsio 17646 114141 0 0 3 0x14280 nfsidl nfsio 31171 94937 0 0 3 0x14280 nfsidl nfsio 20159 322034 0 0 3 0x14280 nfsidl nfsio 74909 249315 0 0 3 0x14280 nfsidl nfsio 223 447161 0 0 3 0x14280 nfsidl nfsio 78130 107622 17060 0 3 0x8000082 nanoslp syz-executor.7 43378 227126 17060 0 3 0x8000082 nanoslp syz-executor.5 17425 50385 17060 0 3 0x8000082 nanoslp syz-executor.3 62267 395683 17060 0 3 0x8000082 nanoslp syz-executor.1 24280 468297 17060 0 3 0x8000082 nanoslp syz-executor.6 86537 389287 1 0 3 0x18100083 ttyin getty 66856 292543 17060 0 2 0x8000002 syz-executor.0 83597 195262 0 0 3 0x14200 acct acct 25286 266996 0 0 3 0x14200 bored sosplice 29985 202753 17060 0 3 0x8000082 nanoslp syz-executor.2 17060 112049 84309 0 3 0x1a000082 wait syz-fuzzer 17060 245054 84309 0 3 0x1e000082 nanoslp syz-fuzzer 17060 125006 84309 0 3 0x1e000082 thrsleep syz-fuzzer 17060 315005 84309 0 3 0x1e000082 wait syz-fuzzer 17060 381359 84309 0 3 0x1e000082 wait syz-fuzzer 17060 297037 84309 0 3 0x1e000082 thrsleep syz-fuzzer 17060 413208 84309 0 2 0x1e000082 syz-fuzzer 17060 480340 84309 0 3 0x1e000082 wait syz-fuzzer 17060 186291 84309 0 3 0x1e000082 thrsleep syz-fuzzer 17060 235348 84309 0 3 0x1e000082 wait syz-fuzzer 17060 219886 84309 0 3 0x1e000082 thrsleep syz-fuzzer 17060 371496 84309 0 3 0x1e000082 wait syz-fuzzer 17060 107951 84309 0 3 0x1e000082 kqread syz-fuzzer 17060 334016 84309 0 3 0x1e000082 wait syz-fuzzer 17060 12049 84309 0 3 0x1e000082 thrsleep syz-fuzzer 17060 287790 84309 0 3 0x1e000082 wait syz-fuzzer 84309 495972 80405 0 3 0x810008a sigsusp ksh 80405 195299 30378 0 3 0x1800009a kqread sshd 30378 365981 1 0 3 0x18000088 kqread sshd 96331 28607 27726 74 3 0x19100092 bpf pflogd 27726 337888 1 0 3 0x18000080 sbwait pflogd 66591 422693 81560 73 3 0x19100090 kqread syslogd 81560 446612 1 0 3 0x18100082 sbwait syslogd 72277 517082 1 0 3 0x18100080 kqread resolvd 43931 513146 54960 77 3 0x18100092 kqread dhcpleased 11517 170468 54960 77 3 0x18100092 kqread dhcpleased 54960 42883 1 0 3 0x18000080 kqread dhcpleased 47035 425819 0 0 3 0x14200 bored smr 32340 487704 0 0 2 0x14200 zerothread 48420 170293 0 0 3 0x14200 aiodoned aiodoned 76182 316155 0 0 3 0x14200 syncer update 13993 299457 0 0 3 0x14200 cleaner cleaner *48498 56918 0 0 7 0x14200 reaper 48428 57002 0 0 3 0x14200 pgdaemon pagedaemon 87897 315135 0 0 3 0x14200 bored viomb 34542 100161 0 0 3 0x40014200 acpi0 acpi0 87905 488172 0 0 3 0x40014200 idle1 52891 139902 0 0 3 0x14200 bored softnet3 21092 371522 0 0 3 0x14200 bored softnet2 81204 332936 0 0 3 0x14200 bored softnet1 29423 276898 0 0 3 0x14200 bored softnet0 52876 230002 0 0 3 0x14200 bored systqmp 81871 30418 0 0 3 0x14200 bored systq 90821 132641 0 0 3 0x14200 tmoslp softclockmp 2402 120954 0 0 3 0x40014200 tmoslp softclock 89249 312993 0 0 3 0x40014200 idle0 1 372894 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80686c5400) #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 48498 (reaper) thread 0xffff80002a149488 (56918) exclusive rwlock vmmaplk r = 0 (0xfffffd806b59c7e8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32a sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5291 #3 uvm_map_teardown+0xb3 sys/uvm/uvm_map.c:2502 #4 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 #5 reaper+0x197 sys/kern/kern_exit.c:463 #6 proc_trampoline+0x10 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd80686c5400) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10192 6516K 6582K 166960K 11940 0 pcb 15 14K 16K 166960K 462 0 rtable 202 6K 7K 166960K 1230 0 pf 32 9K 10K 166960K 176 0 ifaddr 40 15K 16K 166960K 180 0 ifgroup 55 2K 2K 166960K 280 0 sysctl 3 0K 1K 166960K 9 0 counters 64 36K 36K 166960K 182 0 ioctlops 0 0K 4K 166960K 1631 0 iov 0 0K 32K 166960K 249 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1361 86K 87K 166960K 2514 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 78 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 144 0 dirhash 12 2K 2K 166960K 69 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 81K 166960K 3292 0 sigio 1 0K 0K 166960K 68 0 proc 70 91K 128K 166960K 1417 0 subproc 104 6K 6K 166960K 395 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 484 0 in_multi 69 5K 7K 166960K 432 0 ether_multi 1 0K 0K 166960K 20 0 mrt 1 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 1098 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 348 97K 130K 166960K 31242 0 UVM aobj 46 4K 4K 166960K 52 0 pinsyscall 40 80K 108K 166960K 5053 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 236 0 NDP 12 0K 2K 166960K 129 0 temp 75 6816K 6900K 166960K 62638 0 kqueue 12 18K 29K 166960K 464 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 356 0 353 3 2 1 3 0 8 0 rtentry 112 413 0 321 4 0 4 4 0 8 0 unpcb 144 2506 0 2483 18 16 2 6 0 8 1 syncache 336 38 0 38 9 9 0 1 0 8 0 tcpqe 32 24 432 24 2 2 0 1 0 8 0 tcpcb 808 1287 0 1242 25 19 6 10 0 8 1 arp 120 84 0 61 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 392 3839 0 3785 41 33 8 13 0 8 1 nd6 136 98 0 83 1 0 1 1 0 8 0 pkpcb 40 23 0 23 10 9 1 1 0 8 1 kcovpl 48 30 0 22 1 0 1 1 0 8 0 ppxss 1168 14 0 14 7 7 0 1 0 8 0 pffrag 232 22 0 15 1 0 1 1 0 482 0 pffrnode 88 20 0 13 1 0 1 1 0 8 0 pffrent 40 122 0 115 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 24 204 0 145 1 0 1 1 0 8 0 pfstkey 128 207 0 148 3 0 3 3 0 8 0 pfstate 376 207 0 148 8 1 7 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 1519 0 1154 33 4 29 30 0 8 3 art_table 32 1520 0 1154 4 0 4 4 0 8 0 art_node 16 407 0 325 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 2 1 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 140 0 130 1 0 1 1 0 8 0 shmpl 112 49 0 6 2 0 2 2 0 8 0 dirhash 1024 55 0 38 3 0 3 3 0 8 0 dino2pl 256 6488 0 4953 97 0 97 97 0 8 0 ffsino 272 6488 0 4953 103 0 103 103 0 8 0 nchpl 144 11317 0 9575 67 0 67 67 0 8 0 uvmvnodes 80 7080 0 0 145 0 145 145 0 8 0 vnodes 216 7080 0 0 394 0 394 394 0 8 0 namei 1024 37094 0 37094 8 7 1 3 0 8 1 percpumem 16 105 0 59 1 0 1 1 0 8 0 vcpupl 2048 8 0 2 1 0 1 1 0 8 0 vmpool 696 20 0 14 1 0 1 1 0 8 0 kstatmem 264 142 0 118 2 0 2 2 0 8 0 scsiplug 72 4 0 4 4 3 1 1 0 8 1 scxspl 216 46764 0 46764 23 22 1 8 1 8 1 plimitpl 152 467 0 447 1 0 1 1 0 8 0 sigapl 424 3606 0 3536 13 4 9 9 0 8 0 futexpl 64 43351 0 43347 3 2 1 1 0 8 0 knotepl 120 912 0 0 26 0 26 26 0 8 0 kqueuepl 216 1032 0 1022 6 5 1 5 0 8 0 pipepl 320 584 0 556 4 1 3 4 0 8 0 fdescpl 496 3546 0 3517 8 3 5 5 0 8 1 filepl 152 21552 0 21295 32 20 12 16 0 8 0 lockfpl 104 918 0 915 1 0 1 1 0 8 0 lockfspl 48 347 0 344 1 0 1 1 0 8 0 sessionpl 144 47 0 30 1 0 1 1 0 8 0 pgrppl 48 80 0 63 1 0 1 1 0 8 0 ucredpl 104 3308 0 3294 1 0 1 1 0 8 0 zombiepl 144 3537 0 3536 2 1 1 1 0 8 0 processpl 1136 3606 0 3536 8 2 6 6 0 8 0 procpl 656 7429 0 7336 9 0 9 9 0 8 0 srpgc 96 12 0 12 5 5 0 1 0 8 0 sosppl 168 156 0 142 3 2 1 1 0 8 0 sockpl 664 6805 0 6729 51 43 8 18 0 8 0 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 20 0 0 3 1 2 3 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 343 0 0 41 0 41 41 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 1094 0 0 62 0 62 62 0 8 0 bufpl 280 12533 0 5382 511 0 511 511 0 8 0 anonpl 24 561623 0 555224 143 74 69 76 0 186 5 amapchunkpl 152 101520 0 100808 88 49 39 48 0 158 8 amappl16 200 13685 0 13575 83 65 18 31 0 8 8 amappl15 192 20 0 20 1 1 0 1 0 8 0 amappl14 184 253 0 236 2 1 1 2 0 8 0 amappl13 176 48 0 47 1 0 1 1 0 8 0 amappl12 168 4592 0 4553 3 1 2 2 0 8 0 amappl11 160 60 0 46 1 0 1 1 0 8 0 amappl10 152 79 0 66 1 0 1 1 0 8 0 amappl9 144 360 0 359 3 2 1 1 0 8 0 amappl8 136 546 0 435 5 0 5 5 0 8 0 amappl7 128 114 0 99 1 0 1 1 0 8 0 amappl6 120 655 0 633 2 1 1 2 0 8 0 amappl5 112 316 0 301 1 0 1 1 0 8 0 amappl4 104 834 0 790 3 1 2 3 0 8 0 amappl3 96 19158 0 19067 3 0 3 3 0 8 0 amappl2 88 4162 0 4075 5 3 2 4 0 8 0 amappl1 80 22499 0 21951 23 10 13 23 0 8 0 amappl 88 30203 0 29990 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 51 0 6 1 0 1 1 0 8 0 uaddrrnd 24 3566 0 3531 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3566 0 3531 1 0 1 1 0 8 0 vmmpekpl 168 27976 0 27913 4 0 4 4 0 8 0 vmmpepl 168 235659 0 233540 190 80 110 121 0 357 6 vmsppl 440 3565 0 3530 6 1 5 5 0 8 0 rwobjpl 56 69324 0 60935 125 5 120 120 0 8 0 pdppl 4096 7139 0 7066 229 152 77 79 0 8 4 pvpl 32 49125 0 0 397 0 397 397 0 265 0 pmappl 248 3565 0 3530 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 633 0 201 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828eb112) at panic+0x17b sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd80686c53f0,fffffd8008193e20,7f8000100098,20013000,20200000,0,34395b74b13b86ac) at pmap_remove_ptes+0x33e pmap_do_remove(fffffd80686c53f0,20013000,21000000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896 uvm_unmap_kill_entry_withlock(fffffd806b59c6f8,fffffd80695de780,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897 uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806b59c6f8) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd806b59c6f8) 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{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) 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 end of kernel end trace frame: 0x78223bf10590, count: 12 ddb{1}> trace x86_ipi_db(ffff800029cebff0) 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 end of kernel end trace frame: 0x78223bf10590, count: -3