panic: malformed IPv4 option passed to ip_optcopy Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *135442 56733 0 0 0x4000000 0 syz-executor1 db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x147 sys/kern/subr_prf.c:208 ip_optcopy(ffffff002a006f00,ffff800000171290) at ip_optcopy ip_output(ffffff0036ef8e38,ffffff002a006f00,ffffff003cb8e000,22,1000,3c181ea58dbeb4d6) at ip_output+0xbd5 sys/netinet/ip_output.c:501 rip_output(0,9,ffffff000425f1b8,0) at rip_output+0x187 sys/netinet/raw_ip.c:293 rip_usrreq(1000,ffffff000425f1b8,0,ffffff002a006f00,0,3c181ea58dbeb4d6) at rip_usrreq+0x3ed sys/netinet/raw_ip.c:472 sosend(ffffff002f6f8bc8,ffff800014ae8128,1000,ffff800014ae81d0,0,3c181ea58dbeb4d6) at sosend+0x462 sys/kern/uipc_socket.c:513 dofilewritev(ffff800014ad79f0,ffff800014ae81d0,1000,ffff800014ae81e8,d4df163e898) at dofilewritev+0x13e sys/kern/sys_generic.c:364 sys_write(ffff800014ae8270,ffff800014ad79f0,ffff8000149d02f8) at sys_write+0x6e sys/kern/sys_generic.c:283 syscall(0) at syscall+0x3e4 Xsyscall(6,0,c,0,3,d4af7b13010) at Xsyscall+0x128 end of kernel end trace frame: 0xd4df163e920, count: 4 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.