uvm_fault(0xfffffd806c499208, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82f50ca8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80002a308aa0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82f50ca8 Starting stack trace... panic(ffffffff834e8b9e) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3089f0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a222fa0,fffffd805e3a08c8,ffff80002a308bb0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2778 sys_futimens(ffff80002a222fa0,ffff80002a308d00,ffff80002a308c50) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2854 syscall(ffff80002a308d00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a308d00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd303d18db30, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -1555439200 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *212710 94175 0 0 0x4000000 1 syz-executor 30820 90246 0 0x100003 0x80 0 getty savectx() at savectx+0xae end of kernel end trace frame: 0x2fa536c6180, 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. ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}>