[ j«ÏÀЭpanic: kernel diagnostic assertion "ifa == rt->rt_ifa" failed: file "/syzkaller/managers/multicore/kernel/sys/netinet6/nd6.c", line 947 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *336829 27930 0 0 0x4000000 1K syz-executor.0 156411 55975 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82205f9e,ffffffff821fddf3,3b3,ffffffff821c0602) at __assert+0x2b sys/kern/subr_prf.c:154 nd6_rtrequest(ffff800000ba6800,1,fffffd8073ec22a8) at nd6_rtrequest+0xbb4 sys/netinet6/nd6.c:947 rtrequest(1,ffff800021ba54b8,1,ffff800021ba5588,0) at rtrequest+0x9bf sys/net/route.c:973 rt_ifa_add(ffff800000b56f00,240404,ffff800000b56f58,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000b56f00) at rt_ifa_addlocal+0x16d sys/net/route.c:1242 in_ifinit(ffff800000ba6800,ffff800000b56f00,ffff800021ba58b0,0) at in_ifinit+0x1cf sys/netinet/in.c:614 in_ioctl_sifaddr(8020690c,ffff800021ba58a0,ffff800000ba6800,1) at in_ioctl_sifaddr+0x208 sys/netinet/in.c:360 in_ioctl(8020690c,ffff800021ba58a0,ffff800000ba6800,1) at in_ioctl+0x1e7 sys/netinet/in.c:231 ifioctl(fffffd8062358808,8020690c,ffff800021ba58a0,ffff800020acf658) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020acf658,ffff800021ba59b8,ffff800021ba5a00) at sys_ioctl+0x5b9 syscall(ffff800021ba5a80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021ba5a80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,e8fcfab1010) at Xsyscall+0x128 end of kernel end trace frame: 0xe91f19e4c30, count: 1 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.