uvm_fault(0xfffffd805ddbb028, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0x108: movq 0(%r14),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND dt_ioctl_record_stop(ffff80000148f000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a2e4d18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a2e4d18) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002ec033e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805a6f0c08,81,fffffd80097fb0d0,ffff80002a2e4d18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805d0763a8,ffff80002a2e4d18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805d0763a8,ffff80002a2e4d18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805d0763a8,ffff80002a2e4d18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805d0763a8,ffff80002a2e4d18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a2e4d18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a2e4d18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a2e4d18,ffff80002ec03750,ffff80002ec036a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ec03750) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ec03750) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71603368d5a0, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.