uvm_fault(0xfffffd807e192e28, 0x18, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      mtx_enter+0x59: movq    0(%r14),%rax
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*448936  36522      0           0  0x4000000    0  syz-executor
mtx_enter(18) at mtx_enter+0x59 sys/kern/kern_lock.c:320
clockintr_unbind(ffff80000153f330,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001495600) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576
dtclose(11e5f,81,2000,ffff80002a7c3498) at dtclose+0xd5 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80002a7c3498) at dtclose+0xd5 sys/dev/dt/dt_dev.c:232
spec_close(ffff80003c95d270) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8067240438,81,fffffd8007bfb958,ffff80002a7c3498) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156
vn_closefile(fffffd8067345e18,ffff80002a7c3498) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd8067345e18,ffff80002a7c3498) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd8067345e18,ffff80002a7c3498) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd8067345e18,ffff80002a7c3498) at closef+0x18d sys/kern/kern_descrip.c:1251
syscall(ffff80003c95d4d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c95d4d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x96e37cee2e0, 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.