./file0uvm_fault(0xfffffd806c233d38, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dt_ioctl_record_stop+0xf0: movq 0(%r14),%r12 TID PID UID PRFLAGS PFLAGS CPU COMMAND 406273 66031 0 0x14000 0x200 0 reaper dt_ioctl_record_stop(ffff800001706000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(21e5f,81,2000,ffff80003c4942c0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c4942c0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a364480) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806e0ecd90,81,fffffd80097fb478,ffff80003c4942c0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd807b5796d0,ffff80003c4942c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807b5796d0,ffff80003c4942c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd807b5796d0,ffff80003c4942c0) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd807b5796d0,ffff80003c4942c0) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4942c0) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4942c0,0,0,1) at exit1+0x5a0 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4942c0,ffff80002a3647f0,ffff80002a364740) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3647f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3647f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78dae4c22c00, 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.