uvm_fault(0xfffffd800b0273d0, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff82aa4568 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800031807090
gsbase 0xffff8000299edff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff82aa4568
Starting stack trace...
panic(ffffffff833a7649) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff800031806fe0) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff800001478000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586
dtclose(11e5f,81,2000,ffff800031808fb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff800031808fb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232
spec_close(ffff800031807190) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8060217388,81,fffffd80097fb4e0,ffff800031808fb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806bcffa38,ffff800031808fb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806bcffa38,ffff800031808fb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806bcffa38,ffff800031808fb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806bcffa38,ffff800031808fb0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff800031808fb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff800031808fb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff800031808fb0,ffff800031807500,ffff800031807450) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031807500) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031807500) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77961e4ef300, count: 242
End of stack trace.
WARNING: SPL NOT LOWERED ON SYSCALL 83 -166012880 EXIT 0 4
Stopped at      savectx+0xae:   movl    $0,%gs:0x688
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*456129  69741      0           0  0x4000000    1  syz-executor
  93294  73107      0     0x14000      0x200    0  reaper
savectx() at savectx+0xae
end of kernel
end trace frame: 0x5942e554ae0, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.