panic: pmap_remove_ptes: managed page without PG_PVLIST: va 0xb2d7a4a000, opte 0x5e7eb001
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 116541  75277      0         0x2        0x1    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8346eec1) at panic+0x1e5 sys/kern/subr_prf.c:198
pmap_remove_pte(fffffd806c78b100,fffffd8004c858b8,7f80596bd150,b2d7a2a000,b2d7c00000,0) at pmap_remove_pte
pmap_do_remove(fffffd806c78b100,b2d7a2a000,b2d7e29000,0) at pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920
uvm_unmap_kill_entry_withlock(fffffd805d5547c8,fffffd806be0e310,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869
uvm_map_teardown(fffffd805d5547c8) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffffd805d5547c8) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003c4002d0,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff80003c4002d0,ffff8000337b1630,ffff8000337b1580) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff8000337b1630) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000337b1630) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73ad994c5a90, 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.