panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff830e677b) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8309a2cd,ffffffff8301431e,436,ffffffff8300b496) at __assert+0x29
rtrequest(1,ffff80002a0a2448,4,ffff80002a0a24f0,0) at rtrequest+0xdce sys/net/route.c:1078
rt_ifa_add(ffff80000131f600,840100,ffff80000131f658,0) at rt_ifa_add+0x22e sys/net/route.c:1273
in_ifinit(ffff800001308000,ffff80000131f600,ffff80002a0a2760,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline]
in_ifinit(ffff800001308000,ffff80000131f600,ffff80002a0a2760,1) at in_ifinit+0x4bd sys/netinet/in.c:703
in_ioctl_change_ifaddr(8040691a,ffff80002a0a2750,ffff800001308000) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504
ifioctl(ffff8000013214e0,8040691a,ffff80002a0a2750,ffff80002a05d990) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline]
ifioctl(ffff8000013214e0,8040691a,ffff80002a0a2750,ffff80002a05d990) at ifioctl+0x1571 sys/net/if.c:2449
sys_ioctl(ffff80002a05d990,ffff80002a0a2930,ffff80002a0a2880) at sys_ioctl+0x67c
syscall(ffff80002a0a2930) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a0a2930) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f1dc68bdd70, count: 247
End of stack trace.