uvm_fault(0xffffffff838f0e48, 0xffff8000014a500a, 0, 1) -> e kernel: page fault trap, code=0 Stopped at arp_rtrequest+0x6a4: movzwl 0xc(%rcx,%rbx,1),%ecx TID PID UID PRFLAGS PFLAGS CPU COMMAND *478533 36676 0 0 0x4000000 0 syz-executor arp_rtrequest(ffff800000037058,1,fffffd806c369668) at arp_rtrequest+0x6a4 arprequest sys/netinet/if_ether.c:325 [inline] arp_rtrequest(ffff800000037058,1,fffffd806c369668) at arp_rtrequest+0x6a4 sys/netinet/if_ether.c:226 rtm_output(ffff80000150c600,ffff80003ca0fa48,ffff80003ca0f9a0,40,16) at rtm_output+0xda5 sys/net/rtsock.c:1173 route_output(fffffd8063f48f00,ffff800001530d90) at route_output+0xa2b sys/net/rtsock.c:858 route_send(ffff800001530d90,fffffd8063f48f00,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff800001530d90,0,ffff80003ca0fbf8,0,0,80a) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a8d62d0,3,ffff80003ca0fcf0,80a,ffff80003ca0fd90) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a8d62d0,ffff80003ca0fe40,ffff80003ca0fd90) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80003ca0fe40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003ca0fe40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa79612bdc0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.