panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x7f7fffe16000, opte 0xffffffffffffffff Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *199304 97061 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259516e) at panic+0x161 sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd806a039d88,fffffd8005e34000,7fbfbffff000,7f7fffe00000,7f7fffef4000,0,4f7641876f0d6f63) at pmap_remove_ptes+0x32e pmap_do_remove(fffffd806a039d88,7f7fff7f4000,7f7fffef4000,0) at pmap_do_remove+0x438 sys/arch/amd64/amd64/pmap.c:1864 uvm_unmap_kill_entry_withlock(fffffd8066f25ee8,fffffd806b865310,0) at uvm_unmap_kill_entry_withlock+0x1a2 sys/uvm/uvm_map.c:1928 uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 sys/uvm/uvm_map.c:2578 uvmspace_free(fffffd8066f25ee8) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3504 reaper(ffff8000ffff9ce8) at reaper+0x15d sys/kern/kern_exit.c:448 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x7f7fffe16000, opte 0xffffffffffffffff ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259516e) at panic+0x161 sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd806a039d88,fffffd8005e34000,7fbfbffff000,7f7fffe00000,7f7fffef4000,0,4f7641876f0d6f63) at pmap_remove_ptes+0x32e pmap_do_remove(fffffd806a039d88,7f7fff7f4000,7f7fffef4000,0) at pmap_do_remove+0x438 sys/arch/amd64/amd64/pmap.c:1864 uvm_unmap_kill_entry_withlock(fffffd8066f25ee8,fffffd806b865310,0) at uvm_unmap_kill_entry_withlock+0x1a2 sys/uvm/uvm_map.c:1928 uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 sys/uvm/uvm_map.c:2578 uvmspace_free(fffffd8066f25ee8) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3504 reaper(ffff8000ffff9ce8) at reaper+0x15d sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000216c0a70 rbx 0xfffffd8005e34000 rdx 0 rcx 0 rax 0xffff8000ffff9ce8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf47f948474e03b88 r11 0x81f80ff462b23cbc r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff815e9608 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000216c0a60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (reaper) pid=199304 stat=onproc flags process=14000 proc=200 pri=4, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffffce0,0xffff8000ffff9a58 process=0xffff8000ffffa7d8 user=0xffff8000216bb000, vmspace=0xffffffff82ad2438 estcpu=0, cpticks=1, pctcpu=0.2 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 39692 475115 24392 0 3 0x82 nanoslp syz-executor.3 76142 173968 24392 0 2 0x2 syz-executor.6 59384 329600 24392 0 2 0x2 syz-executor.1 16318 106954 24392 0 3 0x82 piperd syz-executor.0 58686 228726 24392 0 3 0x82 nanoslp syz-executor.5 95984 13794 24392 0 3 0x82 piperd syz-executor.7 88735 9827 24392 0 3 0x82 piperd syz-executor.2 93784 136466 1 0 3 0x100083 ttyopn getty 31760 408575 0 0 3 0x14200 bored sosplice 24392 154915 20339 0 3 0x82 wait syz-fuzzer 24392 162304 20339 0 2 0x4000002 syz-fuzzer 24392 151123 20339 0 3 0x4000082 thrsleep syz-fuzzer 24392 522130 20339 0 3 0x4000082 thrsleep syz-fuzzer 24392 230898 20339 0 3 0x4000082 thrsleep syz-fuzzer 24392 165660 20339 0 2 0x4000082 syz-fuzzer 24392 412120 20339 0 3 0x4000082 wait syz-fuzzer 24392 407097 20339 0 3 0x4000082 thrsleep syz-fuzzer 24392 134283 20339 0 3 0x4000082 wait syz-fuzzer 24392 311968 20339 0 3 0x4000082 wait syz-fuzzer 24392 251746 20339 0 3 0x4000082 wait syz-fuzzer 24392 71635 20339 0 3 0x4000082 wait syz-fuzzer 24392 159517 20339 0 3 0x4000082 wait syz-fuzzer 24392 105606 20339 0 3 0x4000082 wait syz-fuzzer 24392 502777 20339 0 3 0x4000082 thrsleep syz-fuzzer 20339 56156 33148 0 3 0x10008a sigsusp ksh 33148 201406 57176 0 3 0x9a kqread sshd 57176 64652 1 0 3 0x88 kqread sshd 16574 372424 14467 73 3 0x1100090 kqread syslogd 14467 17259 1 0 3 0x100082 netio syslogd 21824 404987 1 0 3 0x100080 kqread resolvd 92931 165227 15662 77 3 0x100092 kqread dhcpleased 1740 263405 15662 77 3 0x100092 kqread dhcpleased 15662 163562 1 0 3 0x80 kqread dhcpleased 61542 39774 0 0 3 0x14200 bored smr 12697 413296 0 0 2 0x14200 zerothread 88676 416895 0 0 3 0x14200 aiodoned aiodoned 53595 47558 0 0 3 0x14200 syncer update 91699 70589 0 0 3 0x14200 cleaner cleaner *97061 199304 0 0 7 0x14200 reaper 7494 232454 0 0 3 0x14200 pgdaemon pagedaemon 42940 247765 0 0 3 0x14200 bored viomb 62051 208442 0 0 3 0x40014200 acpi0 acpi0 84665 328655 0 0 3 0x14200 bored softnet 37957 137723 0 0 3 0x14200 bored softnet 96528 126783 0 0 3 0x14200 bored softnet 28135 315995 0 0 3 0x14200 bored softnet 16050 375321 0 0 3 0x14200 bored systqmp 85858 221633 0 0 3 0x14200 bored systq 60991 427325 0 0 3 0x40014200 bored softclock 8880 140515 0 0 3 0x40014200 idle0 1 226492 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10232 6621K 7340K 78643K 47363 0 pcb 13 16K 18K 78643K 2315 0 rtable 206 17K 18K 78643K 7004 0 ifaddr 303 75K 77K 78643K 3547 0 sysctl 3 1K 1K 78643K 3 0 counters 25 17K 17K 78643K 222 0 ioctlops 0 0K 4K 78643K 22074 0 iov 0 0K 24K 78643K 791 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1434 90K 90K 78643K 13117 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 78 0 VM map 2 0K 0K 78643K 2 0 sem 14 2K 3K 78643K 39 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 69K 78643K 25934 0 sigio 0 0K 0K 78643K 151 0 proc 61 59K 83K 78643K 1711 0 subproc 91 5K 6K 78643K 455 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 11684 0 in_multi 77 5K 6K 78643K 4469 0 ether_multi 1 0K 0K 78643K 73 0 mrt 1 0K 0K 78643K 531 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 1520 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 8 62K 64K 78643K 10 0 UVM amap 423 386K 388K 78643K 158460 0 UVM aobj 27 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 369 0 NDP 11 0K 2K 78643K 806 0 temp 125 4730K 5754K 78643K 130193 0 kqueue 12 18K 24K 78643K 1000 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 398 0 395 4 3 1 2 0 8 0 rtentry 112 3099 0 3016 4 1 3 4 0 8 0 unpcb 144 11082 0 11069 107 106 1 10 0 8 0 syncache 296 118 0 118 11 11 0 1 0 8 0 tcpqe 32 59 0 59 8 8 0 1 0 8 0 tcpcb 768 25967 0 25958 648 640 8 38 0 8 7 arp 88 77 0 63 1 0 1 1 0 8 0 ipq 40 10 0 9 4 3 1 1 0 8 0 ipqe 40 31 0 30 4 3 1 1 0 8 0 inpcb 336 42858 0 42851 303 296 7 23 0 8 6 ip6q 72 5 0 5 2 2 0 1 0 8 0 ip6af 40 9 0 9 2 2 0 1 0 8 0 nd6 48 673 0 654 1 0 1 1 0 8 0 pkpcb 40 28 0 28 7 7 0 1 0 8 0 kcovpl 48 35 0 28 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 2 0 1 0 8 0 ppxss 1160 105 0 105 14 14 0 1 0 8 0 pppxif 1608 32 0 32 9 9 0 1 0 8 0 pfstscr 40 61 0 56 1 0 1 1 0 8 0 pfosfp 40 19 0 18 4 3 1 1 0 8 0 pfosfpen 112 19 0 18 4 3 1 1 0 8 0 pfrktable 1344 126 0 124 3 2 1 2 0 8 0 pfanchor 1280 1007 292 495 43 0 43 43 0 8 0 pftag 88 32 0 18 1 0 1 1 0 8 0 pfqueue 264 13 0 13 6 6 0 1 0 8 0 pfstitem 24 31 0 21 1 0 1 1 0 8 0 pfstkey 120 158 0 155 1 0 1 1 0 8 0 pfstate 336 118 0 113 1 0 1 1 0 8 0 pfrule 1360 6038 0 4457 136 4 132 132 0 8 0 rttmr 136 227 0 227 9 9 0 1 0 8 0 art_heap8 4096 9 0 8 7 6 1 3 0 8 0 art_heap4 256 25739 0 25360 48 20 28 30 0 8 0 art_table 32 25748 0 25368 4 0 4 4 0 8 0 art_node 16 3086 0 3015 1 0 1 1 0 8 0 sysvmsgpl 40 42 0 21 1 0 1 1 0 8 0 semapl 112 33 0 21 1 0 1 1 0 8 0 shmpl 112 25 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 31754 0 30292 92 0 92 92 0 8 0 ffsino 240 31754 0 30292 88 1 87 87 0 8 0 nchpl 144 61010 0 59377 63 1 62 63 0 8 0 rtmask 32 11 0 11 3 3 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 200713 0 200713 6 5 1 3 0 8 1 vcpupl 2048 55 0 2 7 0 7 7 0 8 0 vmpool 536 80 0 27 5 1 4 4 0 8 0 pfiaddrpl 120 256 0 256 15 14 1 1 0 8 1 kstatmem 264 328 0 306 2 0 2 2 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 196072 0 196072 19 18 1 8 0 8 1 plimitpl 152 616 0 601 1 0 1 1 0 8 0 sigapl 424 26297 0 26257 8 2 6 8 0 8 0 futexpl 64 251483 0 251483 2 1 1 1 0 8 1 knotepl 120 241908 0 241828 44 40 4 11 0 8 0 kqueuepl 184 6692 0 6684 60 59 1 7 0 8 0 pipepl 288 2923 0 2895 78 75 3 12 0 8 0 fdescpl 432 26159 0 26138 5 1 4 4 0 8 0 filepl 120 166974 0 166754 202 191 11 19 0 8 3 lockfpl 104 4288 0 4286 6 5 1 2 0 8 0 lockfspl 48 1539 0 1537 1 0 1 1 0 8 0 sessionpl 144 53 0 37 1 0 1 1 0 8 0 pgrppl 48 95 0 79 1 0 1 1 0 8 0 ucredpl 104 14315 0 14305 1 0 1 1 0 8 0 zombiepl 144 26260 0 26257 1 0 1 1 0 8 0 processpl 1000 26297 0 26257 10 4 6 9 0 8 0 procpl 672 61441 0 61387 12 5 7 8 0 8 0 sosppl 168 146 0 146 13 13 0 1 0 8 0 sockpl 456 54385 0 54362 920 909 11 37 0 8 8 mcl64k 65536 344 0 344 53 52 1 1 0 8 1 mcl16k 16384 132 0 132 36 35 1 1 0 8 1 mcl12k 12288 354 0 354 50 49 1 1 0 8 1 mcl9k 9216 131 0 131 40 40 0 1 0 8 0 mcl8k 8192 619 0 619 58 57 1 1 0 8 1 mcl4k 4096 1711 0 1711 38 37 1 1 0 8 1 mcl2k2 2112 601 0 601 57 57 0 1 0 8 0 mcl2k 2048 96650 0 96582 145 132 13 35 0 8 2 mtagpl 96 5322 0 4491 49 22 27 30 0 8 2 mbufpl 256 375133 0 374070 384 298 86 113 0 8 3 bufpl 288 35293 0 28888 458 0 458 458 0 8 0 anonpl 24 4819193 0 4805727 269 175 94 116 0 188 0 amapchunkpl 152 436001 0 435428 105 78 27 38 0 158 1 amappl16 200 62048 0 61561 155 128 27 38 0 8 1 amappl14 184 269 0 254 2 1 1 2 0 8 0 amappl12 168 721 0 715 1 0 1 1 0 8 0 amappl11 160 40 0 30 1 0 1 1 0 8 0 amappl10 152 53 0 44 1 0 1 1 0 8 0 amappl9 144 1014 0 1011 1 0 1 1 0 8 0 amappl8 136 689 0 502 8 1 7 7 0 8 0 amappl7 128 73 0 54 1 0 1 1 0 8 0 amappl6 120 587 0 563 2 1 1 2 0 8 0 amappl5 112 242 0 234 1 0 1 1 0 8 0 amappl4 104 2441 0 2406 1 0 1 1 0 8 0 amappl3 96 71597 0 71555 2 0 2 2 0 8 0 amappl2 88 27054 0 26980 3 1 2 3 0 8 0 amappl1 80 566622 0 566014 25 9 16 21 0 8 0 amappl 88 157332 0 157150 10 4 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 27 0 1 1 0 1 1 0 8 0 uaddrrnd 24 26239 0 26165 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 26239 0 26165 1 0 1 1 0 8 0 vmmpekpl 168 161001 0 160941 3 0 3 3 0 8 0 vmmpepl 168 2315598 0 2313212 340 210 130 156 0 357 1 vmsppl 272 26238 0 26164 9 3 6 6 0 8 0 rwobjpl 24 584488 0 576877 52 5 47 48 0 8 0 pdppl 4096 52484 0 52381 1057 940 117 117 0 8 14 pvpl 32 9980714 0 9962373 541 368 173 253 0 265 0 pmappl 216 26238 0 26164 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3012 0 1965 30 0 30 30 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259516e) at panic+0x161 sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd806a039d88,fffffd8005e34000,7fbfbffff000,7f7fffe00000,7f7fffef4000,0,4f7641876f0d6f63) at pmap_remove_ptes+0x32e pmap_do_remove(fffffd806a039d88,7f7fff7f4000,7f7fffef4000,0) at pmap_do_remove+0x438 sys/arch/amd64/amd64/pmap.c:1864 uvm_unmap_kill_entry_withlock(fffffd8066f25ee8,fffffd806b865310,0) at uvm_unmap_kill_entry_withlock+0x1a2 sys/uvm/uvm_map.c:1928 uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 sys/uvm/uvm_map.c:2578 uvmspace_free(fffffd8066f25ee8) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3504 reaper(ffff8000ffff9ce8) at reaper+0x15d sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259516e) at panic+0x161 sys/kern/subr_prf.c:198 pmap_remove_ptes(fffffd806a039d88,fffffd8005e34000,7fbfbffff000,7f7fffe00000,7f7fffef4000,0,4f7641876f0d6f63) at pmap_remove_ptes+0x32e pmap_do_remove(fffffd806a039d88,7f7fff7f4000,7f7fffef4000,0) at pmap_do_remove+0x438 sys/arch/amd64/amd64/pmap.c:1864 uvm_unmap_kill_entry_withlock(fffffd8066f25ee8,fffffd806b865310,0) at uvm_unmap_kill_entry_withlock+0x1a2 sys/uvm/uvm_map.c:1928 uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd8066f25ee8) at uvm_map_teardown+0x167 sys/uvm/uvm_map.c:2578 uvmspace_free(fffffd8066f25ee8) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3504 reaper(ffff8000ffff9ce8) at reaper+0x15d sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -8