panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x78463c16000, 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(ffffffff8349b137) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd80774d16c8,fffffd800776c680,7f83c231e050,78463c0a000,78463c4a000,0) at pmap_remove_pte pmap_do_remove(fffffd80774d16c8,78463c0a000,78463c4a000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd806cd275d0,fffffd80606b8958,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff8000308c14d8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff8000308c14d8,ffff80003c96d280,ffff80003c96d1d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c96d280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96d280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d3d1cb2cf0, 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 0x78463c16000, opte 0xffffffffffffffff ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349b137) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd80774d16c8,fffffd800776c680,7f83c231e050,78463c0a000,78463c4a000,0) at pmap_remove_pte pmap_do_remove(fffffd80774d16c8,78463c0a000,78463c4a000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd806cd275d0,fffffd80606b8958,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff8000308c14d8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff8000308c14d8,ffff80003c96d280,ffff80003c96d1d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c96d280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96d280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d3d1cb2cf0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c96ce40 rbx 0xfffffd800776c680 rdx 0 rcx 0 rax 0xffff8000308c14d8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2df1235514aa1c15 r11 0x3149b170e23fe2a0 r12 0 r13 0x7f83c231e0b0 r14 0 r15 0x1 rip 0xffffffff826638a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c96ce30 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=60403 pid=60183 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=17, usrpri=73, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000308c14d8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000308c1770,0xffff80002a7462b0 process=0xffff8000ffff8018 user=0xffff80003c968000, vmspace=0xfffffd806cd275d0 estcpu=23, cpticks=6, pctcpu=0.4, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 9865 476136 55156 0 2 0 syz-executor 9865 87547 55156 0 3 0x4000080 fsleep syz-executor 89338 186898 91761 0 2 0 syz-executor 89338 378414 91761 0 3 0x4000080 sbwait syz-executor 89338 208092 91761 0 3 0x4000080 sbufrcv syz-executor 94887 116151 98758 0 2 0 syz-executor 94887 356695 98758 0 3 0x4000000 biowait syz-executor 63429 385659 36345 0 2 0 syz-executor 63429 434037 36345 0 3 0x4000080 fsleep syz-executor 34039 248899 25044 0 3 0x80 nanoslp syz-executor 34039 192413 25044 0 3 0x4000080 netcon syz-executor 34039 157221 25044 0 3 0x4000080 fsleep syz-executor 78835 22935 77262 0 3 0x90 nanoslp syz-executor 78835 333257 77262 0 3 0x4000090 ttyout syz-executor 78835 68550 77262 0 3 0x4000090 fsleep syz-executor 92358 282191 8791 60929 3 0x90 nanoslp syz-executor 92358 510653 8791 60929 3 0x4000090 kqread syz-executor 92358 301807 8791 60929 3 0x4000090 fsleep syz-executor 77262 406796 5643 0 3 0x82 nanoslp syz-executor 8791 241716 5643 0 3 0x82 nanoslp syz-executor 69006 229266 1 0 3 0x100083 ttyin getty 55156 64209 5643 0 3 0x82 nanoslp syz-executor 36345 208001 5643 0 3 0x82 nanoslp syz-executor 25044 490759 5643 0 3 0x82 nanoslp syz-executor 98758 175761 5643 0 3 0x82 nanoslp syz-executor 91761 431424 5643 0 3 0x82 nanoslp syz-executor 32062 72156 5643 0 3 0x82 nanoslp syz-executor 5643 254440 81905 0 3 0x82 kqread syz-executor 81905 342414 86770 0 3 0x10008a sigsusp ksh 86770 272007 70642 0 3 0x98 kqread sshd-session 70642 270988 74576 0 3 0x92 kqread sshd-session 74576 23196 1 0 3 0x88 kqread sshd 10872 212179 54964 73 3 0x1100090 kqread syslogd 54964 418749 1 0 3 0x100082 sbwait syslogd 78203 25598 1 0 3 0x100080 kqread resolvd 43358 145552 8979 77 3 0x100092 kqread dhcpleased 40896 92226 8979 77 3 0x100092 kqread dhcpleased 8979 449038 1 0 3 0x80 kqread dhcpleased 41913 22153 0 0 3 0x14200 bored smr 12115 432817 0 0 2 0x14200 zerothread 97713 154826 0 0 3 0x14200 aiodoned aiodoned 62861 183201 0 0 3 0x14200 syncer update 72974 503543 0 0 3 0x14200 cleaner cleaner 19589 209515 0 0 3 0x14200 reaper reaper 38907 230651 0 0 3 0x14200 pgdaemon pagedaemon 29000 518459 0 0 3 0x14200 bored viomb 38305 499967 0 0 3 0x40014200 acpi0 acpi0 62341 117192 0 0 3 0x14200 bored softnet0 40676 56949 0 0 3 0x14200 bored systqmp 41240 266135 0 0 3 0x14200 bored systq 92713 503443 0 0 3 0x40014200 tmoslp softclock 57428 334397 0 0 3 0x40014200 idle0 1 100081 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 11070 12345K 12829K 166960K 13196 0 pcb 17 12K 12K 166960K 139 0 rtable 239 9K 9K 166960K 536 0 pf 32 13K 14K 166960K 91 0 ifaddr 43 8K 8K 166960K 88 0 ifgroup 53 2K 2K 166960K 125 0 sysctl 4 1K 9K 166960K 11 0 counters 33 17K 18K 166960K 73 0 ioctlops 0 0K 4K 166960K 271 0 iov 1 4K 28K 166960K 39 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1327 84K 84K 166960K 2181 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 13 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 776 0 sigio 0 0K 0K 166960K 9 0 proc 60 59K 124K 166960K 658 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 100 0 in_multi 101 7K 7K 166960K 165 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 517 0 fusefs mount 1 32K 32K 166960K 1 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 244 160K 180K 166960K 8477 0 UVM aobj 24 22K 22K 166960K 25 0 pinsyscall 38 76K 98K 166960K 1979 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 41 0 NDP 11 0K 2K 166960K 58 0 temp 53 9070K 9142K 166960K 34106 0 kqueue 13 20K 34K 166960K 182 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 99 0 96 1 0 1 1 0 8 0 rtentry 136 161 0 59 4 0 4 4 0 8 0 unpcb 144 445 0 428 3 0 3 3 0 8 2 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 266 0 254 7 0 7 7 0 8 5 arp 96 25 0 6 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 4 0 2 1 0 1 1 0 8 0 inpcb 328 730 0 713 7 0 7 7 0 8 5 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 38 0 12 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 31 0 31 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 0 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 680 0 258 29 0 29 29 0 8 2 art_table 40 682 0 258 5 0 5 5 0 8 0 art_node 32 161 0 70 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2805 0 1339 92 0 92 92 0 8 0 ffsino 256 2805 0 1339 92 0 92 92 0 8 0 nchpl 144 3833 0 2121 64 0 64 64 0 8 0 rtmask 32 9 0 9 1 0 1 1 0 8 1 vnodes 216 3376 0 0 188 0 188 188 0 8 0 namei 1024 13803 0 13802 2 0 2 2 0 8 1 vcpupl 3904 10 0 1 2 0 2 2 0 8 0 vmpool 808 10 0 1 1 0 1 1 0 8 0 kstatmem 264 72 0 50 2 0 2 2 0 8 0 scsiplug 72 6 0 6 1 0 1 1 0 8 1 scxspl 216 14905 0 14904 8 0 8 8 1 8 7 plimitpl 152 183 0 165 1 0 1 1 0 8 0 sigapl 424 1070 0 1027 6 0 6 6 0 8 1 knotepl 120 36449 0 36402 22 11 11 18 0 8 6 kqueuepl 184 289 0 279 4 0 4 4 0 8 3 pipepl 304 278 0 251 5 0 5 5 0 8 2 fdescpl 448 1057 0 1028 5 0 5 5 0 8 1 filepl 120 6428 0 6203 12 0 12 12 0 8 4 lockfpl 104 345 0 342 2 0 2 2 0 8 1 lockfspl 48 126 0 123 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 1302 0 1289 1 0 1 1 0 8 0 zombiepl 144 1028 0 1027 1 0 1 1 0 8 0 processpl 1152 1070 0 1027 4 0 4 4 0 8 0 procpl 664 1966 0 1912 6 0 6 6 0 8 0 sosppl 176 6 0 4 1 0 1 1 0 8 0 sockpl 552 1290 0 1253 8 0 8 8 0 8 4 mcl64k 65536 26 0 26 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 1 0 1 1 0 8 1 mcl4k 4096 3276 0 3221 15 0 15 15 0 8 7 mcl2k 2048 754 0 753 2 0 2 2 0 8 1 mtagpl 96 161 0 9 4 0 4 4 0 8 0 mbufpl 256 11371 0 11041 22 0 22 22 0 8 0 bufpl 280 5028 0 108 352 0 352 352 0 8 0 anonpl 24 172497 0 169175 45 0 45 45 0 187 12 amapchunkpl 152 28485 0 27951 36 0 36 36 0 158 15 amappl16 200 2887 0 2855 14 3 11 14 0 8 8 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 445 0 444 1 0 1 1 0 8 0 amappl13 176 130 0 120 1 0 1 1 0 8 0 amappl12 168 1379 0 1350 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 0 1 1 0 8 1 amappl10 152 65 0 55 1 0 1 1 0 8 0 amappl9 144 272 0 271 1 0 1 1 0 8 0 amappl8 136 115 0 113 1 0 1 1 0 8 0 amappl7 128 152 0 141 1 0 1 1 0 8 0 amappl6 120 182 0 181 1 0 1 1 0 8 0 amappl5 112 99 0 91 1 0 1 1 0 8 0 amappl4 104 286 0 270 1 0 1 1 0 8 0 amappl3 96 5432 0 5309 4 0 4 4 0 8 0 amappl2 88 578 0 525 2 0 2 2 0 8 0 amappl1 80 13136 0 12588 15 0 15 15 0 8 2 amappl 88 7580 0 7400 5 0 5 5 0 92 0 uvmvnodes 80 114 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 24 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1057 0 1027 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1057 0 1027 1 0 1 1 0 8 0 vmmpekpl 168 10118 0 10071 3 0 3 3 0 8 0 vmmpepl 168 74421 0 72566 99 0 99 99 0 357 16 vmsppl 368 1056 0 1027 4 0 4 4 0 8 1 rwobjpl 40 22208 0 21201 14 0 14 14 0 8 0 pdppl 4096 2140 0 2065 105 30 75 82 0 8 0 pvpl 32 475083 0 465947 121 0 121 121 0 265 26 pmappl 216 1066 0 1028 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 30 11 0 11 11 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(ffffffff8349b137) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd80774d16c8,fffffd800776c680,7f83c231e050,78463c0a000,78463c4a000,0) at pmap_remove_pte pmap_do_remove(fffffd80774d16c8,78463c0a000,78463c4a000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd806cd275d0,fffffd80606b8958,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff8000308c14d8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff8000308c14d8,ffff80003c96d280,ffff80003c96d1d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c96d280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96d280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d3d1cb2cf0, 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(ffffffff8349b137) at panic+0x1cf sys/kern/subr_prf.c:198 pmap_remove_pte(fffffd80774d16c8,fffffd800776c680,7f83c231e050,78463c0a000,78463c4a000,0) at pmap_remove_pte pmap_do_remove(fffffd80774d16c8,78463c0a000,78463c4a000,0) at pmap_do_remove+0x53a sys/arch/amd64/amd64/pmap.c:1920 uvm_unmap_kill_entry_withlock(fffffd806cd275d0,fffffd80606b8958,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cd275d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff8000308c14d8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff8000308c14d8,ffff80003c96d280,ffff80003c96d1d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c96d280) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96d280) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d3d1cb2cf0, count: -10