kernel: page fault trap, code=3 Stopped at copyout+0x57: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *359344 57224 0 0 0x4000000 0 syz-executor 281578 50198 0 0x2 0 1 syz-executor copyout() at copyout+0x57 syscall(ffff80003c4e71f0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4e71f0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x755f9106b60, 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.