uvm_fault(0xfffffd806cd2d2f0, 0x18, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      mtx_enter+0x6e: movq    0(%r14),%r15
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*398764  58072      0           0  0x4000000    0  syz-executor
mtx_enter(18) at mtx_enter+0x6e sys/kern/kern_lock.c:549
clockintr_unbind(ffff800001642430,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff8000016aa000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589
dtclose(11e5f,81,2000,ffff80003c91ad18) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80003c91ad18) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239
spec_close(ffff80003c96dba0) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805b2db120,81,fffffd8007ffd618,ffff80003c91ad18) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806cc97c40,ffff80003c91ad18) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806cc97c40,ffff80003c91ad18) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd806cc97c40,ffff80003c91ad18) at fdrop+0x121 sys/kern/kern_descrip.c:1281
sys_ioctl(ffff80003c91ad18,ffff80003c96dea0,ffff80003c96ddf0) at sys_ioctl+0x30a sys/kern/sys_generic.c:520
syscall(ffff80003c96dea0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c96dea0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe6317dc1cb0, count: 4
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.