uvm_fault(0xfffffd8076e795c8, 0x20, 0, 1) -> e kernel: page fault trap, code=0 Stopped at mtx_enter_try+0x65: movl 0x8(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 455300 79335 0 0x14000 0x200 0 reaper mtx_enter_try(18) at mtx_enter_try+0x65 sys/kern/kern_lock.c:290 mtx_enter(18) at mtx_enter+0x62 sys/kern/kern_lock.c:261 clockintr_unbind(ffff8000015d5030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtclose(21e5f,81,2000,ffff80003c430568) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c430568) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a36e550) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80622c0b10,81,fffffd80097fb3a8,ffff80003c430568) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8062fda2f0,ffff80003c430568) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8062fda2f0,ffff80003c430568) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8062fda2f0,ffff80003c430568) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd8062fda2f0,ffff80003c430568) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c430568) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c430568,b,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c430568,ffff80002a36e8c0,ffff80002a36e810) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a36e8c0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a36e8c0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 end trace frame: 0xffff80002a36e940, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.