uvm_fault(0xfffffd806bfd2b90, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8174a1b8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c41f180 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8174a1b8 Starting stack trace... panic(ffffffff833bf62b) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c41f0d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001546000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003c458a88) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c458a88) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c41f280) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805bc8b000,81,fffffd80097fb3a8,ffff80003c458a88) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bf83200,ffff80003c458a88) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bf83200,ffff80003c458a88) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bf83200,ffff80003c458a88) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bf83200,ffff80003c458a88) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c458a88) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c458a88,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c458a88,ffff80003c41f5f0,ffff80003c41f540) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c41f5f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c41f5f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x735dc51549f0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *379953 76441 0 0 0 1 syz-executor 120855 31809 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d3ed577c120, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.