uvm_fault(0xfffffd806fa0fba0, 0x1460, 0, 2) -> e kernel: page fault trap, code=2 Stopped at copyout+0x57: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *366702 16299 60928 0x10 0x4000000 0 syz-executor copyout() at copyout+0x57 syscall(ffff80003c44f9a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44f9a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc1f6e291230, count: 12 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.