uvm_fault(0xffffee806c693018, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81358e58 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c3d7ad0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81358e58 Starting stack trace... panic(ffffffff834ed3e8) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c3d7a20) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3b3a18,ffffee8067c59d00,ffff80003c3d7be0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimens(ffff80003c3b3a18,ffff80003c3d7d30,ffff80003c3d7c80) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766 syscall(ffff80003c3d7d30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d7d30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd0fd1f4aa0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -345095632 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *410484 70519 0 0 0 1 syz-executor 193643 52008 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x74529e2df690, 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.