uvm_fault(0xfffffd806c6fb7b8, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827baa28 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80002a240980 gsbase 0xffff8000299bdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827baa28 Starting stack trace... panic(ffffffff8348093d) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a2408d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a242d08,fffffd805efb6040,ffff80002a240ab0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimes(ffff80002a242d08,ffff80002a240c00,ffff80002a240b50) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2813 syscall(ffff80002a240c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a240c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d4ad05a3d0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 2073917408 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *212389 84555 0 0 0 1 syz-executor 138184 28932 0 0 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7c881f24fc90, 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}> show panic *cpu1: uvm_fault(0xfffffd806c6fb7b8, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7c881f24fc90, count: -1 ddb{1}>