#! uvm_fault(0xfffffd807ece3b80, 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(ffff8000015fab80) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c955cb0) at dtclose+0xd9 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c955cb0) at dtclose+0xd9 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002ccbb9a0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8068588388,81,fffffd8007ffd7b8,ffff80003c955cb0) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cd21438,ffff80003c955cb0) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806cd21438,ffff80003c955cb0) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806cd21438,ffff80003c955cb0) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cd21438,ffff80003c955cb0) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80003c955cb0) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80003c955cb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c955cb0,ffff80002ccbbd00,ffff80002ccbbc50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccbbd00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccbbd00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73b3cdef8390, 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.