uvm_fault(0xfffffd8072e5cb98, 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(ffff8000014fa400) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,1,2000,ffff80002a85caa0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,1,2000,ffff80002a85caa0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a8e18c0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80095b7c00,1,fffffd8007bfb4e0,ffff80002a85caa0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c242870,ffff80002a85caa0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c242870,ffff80002a85caa0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806c242870,ffff80002a85caa0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c242870,ffff80002a85caa0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a85caa0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a85caa0,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a85caa0,ffff80002a8e1c20,ffff80002a8e1b70) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a8e1c20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8e1c20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74012f932e60, 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.