uvm_fault(0xffffffff8362d900, 0xffff80000160206b, 0, 1) -> e kernel: page fault trap, code=0 Stopped at arp_rtrequest+0x660: movzwl 0xc(%r15,%rbx,1),%ecx TID PID UID PRFLAGS PFLAGS CPU COMMAND 122492 37987 0 0 0 0 syz-executor *485701 91412 0 0 0x4000000 1K syz-executor arp_rtrequest(ffff80000159d000,1,fffffd806e852930) at arp_rtrequest+0x660 arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff80000159d000,1,fffffd806e852930) at arp_rtrequest+0x660 sys/netinet/if_ether.c:184 rtrequest(1,ffff8000372bccd8,1,ffff8000372bcd80,0) at rtrequest+0xbdc sys/net/route.c:1103 rt_ifa_add(ffff80000156f300,240004,ffff80000156f358,0) at rt_ifa_add+0x22e sys/net/route.c:1273 rt_ifa_addlocal(ffff80000156f300) at rt_ifa_addlocal+0x1d2 sys/net/route.c:1381 in_ifinit(ffff80000159d000,ffff80000156f300,ffff8000372bd020,0) at in_ifinit+0x26c sys/netinet/in.c:669 in_ioctl_set_ifaddr(8020690c,ffff8000372bd010,ffff80000159d000) at in_ioctl_set_ifaddr+0x345 sys/netinet/in.c:386 ifioctl(ffff800001619ce8,8020690c,ffff8000372bd010,ffff8000ffff31d8) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001619ce8,8020690c,ffff8000372bd010,ffff8000ffff31d8) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff31d8,ffff8000372bd1f0,ffff8000372bd140) at sys_ioctl+0x67c syscall(ffff8000372bd1f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372bd1f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x10100ff9270, count: 5 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.