panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x200000016000, 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(ffffffff8349a006) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806916e880,fffffd8006b13980,7f9000000080,200000010000,200000200000,0) at pmap_remove_pte pmap_do_remove(fffffd806916e880,200000010000,200001000000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd807ecebcf0,fffffd806df76a18,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a756538,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a756538,ffff8000314e5b80,ffff8000314e5ad0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314e5b80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314e5b80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a9acf41bd0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x200000016000, opte 0xffffffffffffffff ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349a006) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806916e880,fffffd8006b13980,7f9000000080,200000010000,200000200000,0) at pmap_remove_pte pmap_do_remove(fffffd806916e880,200000010000,200001000000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd807ecebcf0,fffffd806df76a18,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a756538,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a756538,ffff8000314e5b80,ffff8000314e5ad0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314e5b80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314e5b80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a9acf41bd0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000314e5740 rbx 0xfffffd8006b13980 rdx 0 rcx 0 rax 0xffff80002a756538 r8 0x101010101010101 r9 0x8080808080808080 r10 0x59526dd052165926 r11 0xd8f62ff50ba04940 r12 0 r13 0x7f90000000b0 r14 0 r15 0x1 rip 0xffffffff82289575 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000314e5730 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=396308 pid=91618 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a756538 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003a90d788,0xffff8000380ea2d0 process=0xffff80002a7bfa90 user=0xffff8000314e0000, vmspace=0xfffffd807ecebcf0 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31281 95174 76933 0 3 0x80 fsleep syz-executor 31281 134599 76933 0 3 0x4000080 kqsel syz-executor 77846 66845 10062 0 3 0x80 fsleep syz-executor 77846 501726 10062 0 3 0x4000080 kqread syz-executor 56816 408481 12294 0 3 0x80 fsleep syz-executor 56816 81070 12294 0 3 0x4000080 sbwait syz-executor 22366 240287 41784 0 3 0x80 fsleep syz-executor 22366 92130 41784 0 3 0x4000080 sbwait syz-executor 24609 266151 50928 0 3 0x80 fsleep syz-executor 24609 516451 50928 0 3 0x4000080 kqsel syz-executor 24609 59656 50928 0 3 0x4000080 fsleep syz-executor 97440 9325 91763 0 3 0x80 fsleep syz-executor 97440 483260 91763 0 3 0x4000080 tunread syz-executor 97440 74708 91763 0 3 0x4000080 fsleep syz-executor 75725 126804 65394 0 3 0x80 fsleep syz-executor 75725 478850 65394 0 3 0x4000080 fsleep syz-executor 75725 296751 65394 0 3 0x4000080 kqsel syz-executor 69043 362503 0 0 3 0x14200 acct acct 79413 7889 1 0 3 0x100083 ttyin getty 41784 254366 51629 0 3 0x82 nanoslp syz-executor 24295 380115 0 0 3 0x14280 nfsidl nfsio 4908 11716 0 0 3 0x14280 nfsidl nfsio 69277 206132 0 0 3 0x14280 nfsidl nfsio 17457 366606 0 0 3 0x14280 nfsidl nfsio 49147 165021 0 0 3 0x14280 nfsidl nfsio 54807 172502 0 0 3 0x14280 nfsidl nfsio 52891 382960 0 0 3 0x14280 nfsidl nfsio 48898 48019 0 0 3 0x14280 nfsidl nfsio 81217 120963 0 0 3 0x14280 nfsidl nfsio 39739 356724 0 0 3 0x14280 nfsidl nfsio 11612 493545 0 0 3 0x14280 nfsidl nfsio 19981 298635 0 0 3 0x14280 nfsidl nfsio 26634 101325 0 0 3 0x14280 nfsidl nfsio 20441 359001 0 0 3 0x14280 nfsidl nfsio 27898 194297 0 0 3 0x14280 nfsidl nfsio 63346 379461 0 0 3 0x14280 nfsidl nfsio 73054 466102 0 0 3 0x14280 nfsidl nfsio 65296 301661 0 0 3 0x14280 nfsidl nfsio 20440 505535 0 0 3 0x14280 nfsidl nfsio 58920 79640 0 0 3 0x14280 nfsidl nfsio 12294 282803 51629 0 3 0x82 nanoslp syz-executor 10062 405317 51629 0 3 0x82 nanoslp syz-executor 58421 263519 51629 0 3 0x82 nanoslp syz-executor 91763 111150 51629 0 3 0x82 nanoslp syz-executor 76933 400707 51629 0 3 0x82 nanoslp syz-executor 50928 217064 51629 0 3 0x82 nanoslp syz-executor 65394 437633 51629 0 3 0x82 nanoslp syz-executor 51629 3621 4537 0 3 0x82 kqread syz-executor 4537 136672 98653 0 3 0x10008a sigsusp ksh 98653 130397 7209 0 3 0x98 kqread sshd-session 7209 362017 16899 0 3 0x92 kqread sshd-session 16899 164525 1 0 3 0x88 kqread sshd 57468 376417 74927 73 3 0x1100090 kqread syslogd 74927 187288 1 0 3 0x100082 sbwait syslogd 58018 510814 1 0 3 0x100080 kqread resolvd 34636 270978 6530 77 3 0x100092 kqread dhcpleased 99323 184452 6530 77 3 0x100092 kqread dhcpleased 6530 161791 1 0 3 0x80 kqread dhcpleased 64980 464172 0 0 3 0x14200 bored smr 61669 260434 0 0 3 0x14200 pgzero zerothread 98560 113458 0 0 3 0x14200 aiodoned aiodoned 10372 15223 0 0 3 0x14200 syncer update 85793 286355 0 0 3 0x14200 cleaner cleaner 29866 434141 0 0 3 0x14200 reaper reaper 49895 379790 0 0 3 0x14200 pgdaemon pagedaemon 28057 38535 0 0 3 0x14200 bored viomb 54305 264771 0 0 3 0x40014200 acpi0 acpi0 70024 427480 0 0 3 0x14200 bored softnet0 62015 69467 0 0 3 0x14200 bored systqmp 60771 380565 0 0 3 0x14200 bored systq 12606 153499 0 0 3 0x40014200 tmoslp softclock 48357 245576 0 0 3 0x40014200 idle0 1 336683 0 0 3 0x80082 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 11079 12115K 13376K 166960K 14011 0 pcb 19 15K 16K 166960K 325 0 rtable 247 12K 13K 166960K 642 0 pf 40 15K 17K 166960K 291 0 ifaddr 41 7K 7K 166960K 123 0 ifgroup 58 2K 2K 166960K 209 0 sysctl 4 1K 9K 166960K 19 0 counters 35 18K 18K 166960K 110 0 ioctlops 0 0K 4K 166960K 361 0 iov 0 0K 32K 166960K 176 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 93K 166960K 2670 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 184 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1214 0 sigio 0 0K 0K 166960K 21 0 proc 60 59K 124K 166960K 743 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 248 0 in_multi 90 6K 7K 166960K 184 0 ether_multi 1 0K 0K 166960K 8 0 mrt 0 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 632 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 151K 169K 166960K 12066 0 UVM aobj 43 10K 10K 166960K 50 0 pinsyscall 38 76K 96K 166960K 2425 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 72 0 NDP 13 0K 2K 166960K 86 0 temp 64 9072K 9326K 166960K 58427 0 kqueue 15 24K 35K 166960K 224 0 SYN cache 2 8K 16K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 124 0 121 1 0 1 1 0 8 0 rtentry 136 191 0 99 4 0 4 4 0 8 0 unpcb 144 1045 0 1027 6 5 1 6 0 8 0 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 401 0 394 4 3 1 4 0 8 0 arp 96 32 0 16 1 0 1 1 0 8 0 inpcb 328 1154 0 1141 7 5 2 7 0 8 0 nd6 112 39 0 17 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 54 0 54 1 1 0 1 0 8 0 pppxif 1384 10 0 10 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 32 0 22 1 0 1 1 0 482 0 pffrnode 88 13 0 4 1 0 1 1 0 8 0 pffrent 40 131 0 120 1 0 1 1 0 8 0 pfrktable 1344 5 0 2 1 0 1 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 3 0 2 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 4 1 0 1 1 0 8 0 pfstate 384 3 0 2 1 0 1 1 0 8 0 pfrule 1360 6 0 5 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 780 0 365 29 2 27 29 0 8 0 art_table 40 784 0 365 5 0 5 5 0 8 0 art_node 32 191 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 176 0 166 1 0 1 1 0 8 0 shmpl 112 43 0 6 2 0 2 2 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 3705 0 2250 92 0 92 92 0 8 0 ffsino 256 3705 0 2250 92 0 92 92 0 8 0 nchpl 144 5308 0 3601 64 0 64 64 0 8 0 rtmask 32 9 0 9 1 1 0 1 0 8 0 vnodes 216 4521 0 0 252 0 252 252 0 8 0 namei 1024 19053 0 19053 3 2 1 2 0 8 1 vcpupl 3904 4 0 1 1 0 1 1 0 8 0 vmpool 808 4 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 124 0 98 3 1 2 3 0 8 0 scsiplug 72 5 0 5 1 1 0 1 0 8 0 scxspl 216 19673 0 19673 8 7 1 8 1 8 1 plimitpl 152 397 0 380 1 0 1 1 0 8 0 sigapl 424 1513 0 1449 8 0 8 8 0 8 0 knotepl 120 66676 0 66484 54 48 6 22 0 8 0 kqueuepl 184 352 0 336 2 1 1 2 0 8 0 pipepl 304 219 0 192 3 0 3 3 0 8 0 fdescpl 448 1479 0 1450 5 1 4 5 0 8 0 filepl 120 9873 0 9653 14 4 10 14 0 8 0 lockfpl 104 705 0 702 2 1 1 2 0 8 0 lockfspl 48 224 0 221 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 1837 0 1825 1 0 1 1 0 8 0 zombiepl 144 1450 0 1449 2 1 1 1 0 8 0 processpl 1152 1513 0 1449 5 0 5 5 0 8 0 procpl 664 3049 0 2975 7 0 7 7 0 8 0 sosppl 176 8 0 8 1 1 0 1 0 8 0 sockpl 552 2372 0 2338 22 19 3 15 0 8 0 mcl64k 65536 51 0 49 1 0 1 1 0 8 0 mcl16k 16384 3 0 3 1 1 0 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 75 0 75 1 1 0 1 0 8 0 mcl4k 4096 3814 0 3764 13 6 7 13 0 8 0 mcl2k 2048 1234 0 1230 4 3 1 4 0 8 0 mtagpl 96 20 0 13 1 0 1 1 0 8 0 mbufpl 256 102769 0 102631 172 157 15 115 0 8 0 bufpl 280 6432 0 214 445 0 445 445 0 8 0 anonpl 24 202717 0 199453 57 30 27 57 0 187 0 amapchunkpl 152 40298 0 39805 35 14 21 34 0 158 1 amappl16 200 3309 0 3272 22 17 5 19 0 8 0 amappl15 192 4 0 3 1 0 1 1 0 8 0 amappl14 184 460 0 459 1 0 1 1 0 8 0 amappl13 176 133 0 123 1 0 1 1 0 8 0 amappl12 168 1766 0 1737 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 57 0 47 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 112 0 110 1 0 1 1 0 8 0 amappl7 128 63 0 60 1 0 1 1 0 8 0 amappl6 120 305 0 295 1 0 1 1 0 8 0 amappl5 112 85 0 78 1 0 1 1 0 8 0 amappl4 104 515 0 482 3 1 2 2 0 8 0 amappl3 96 7131 0 7040 3 0 3 3 0 8 0 amappl2 88 1579 0 1515 2 0 2 2 0 8 0 amappl1 80 14875 0 14331 13 0 13 13 0 8 0 amappl 88 11088 0 10922 5 0 5 5 0 92 0 uvmvnodes 80 137 0 0 3 0 3 3 0 8 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 7 0 7 1 1 0 1 0 8 0 dma128 128 256 0 256 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 49 0 7 1 0 1 1 0 8 0 uaddrrnd 24 1479 0 1449 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1479 0 1449 1 0 1 1 0 8 0 vmmpekpl 168 12596 0 12545 3 0 3 3 0 8 0 vmmpepl 168 98100 0 96243 98 10 88 95 0 357 1 vmsppl 368 1478 0 1449 4 1 3 4 0 8 0 rwobjpl 40 26869 0 25835 14 2 12 14 0 8 0 pdppl 4096 2972 0 2903 114 43 71 82 0 8 2 pvpl 32 623049 0 614270 139 52 87 139 0 265 0 pmappl 216 1482 0 1450 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 550 0 224 13 1 12 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349a006) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806916e880,fffffd8006b13980,7f9000000080,200000010000,200000200000,0) at pmap_remove_pte pmap_do_remove(fffffd806916e880,200000010000,200001000000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd807ecebcf0,fffffd806df76a18,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a756538,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a756538,ffff8000314e5b80,ffff8000314e5ad0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314e5b80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314e5b80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a9acf41bd0, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349a006) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd806916e880,fffffd8006b13980,7f9000000080,200000010000,200000200000,0) at pmap_remove_pte pmap_do_remove(fffffd806916e880,200000010000,200001000000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd807ecebcf0,fffffd806df76a18,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd807ecebcf0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a756538,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a756538,ffff8000314e5b80,ffff8000314e5ad0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314e5b80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314e5b80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a9acf41bd0, count: -10