panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 946
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*273271  58932      0           0  0x4000000    0  syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82722f34) at panic+0x161 sys/kern/subr_prf.c:198
__assert(ffffffff827a0c78,ffffffff8275fee9,3b2,ffffffff827780fb) at __assert+0x25 sys/kern/subr_prf.c:157
rtrequest(1,ffff80002e89eb40,4,ffff80002e89ec08,0) at rtrequest+0xc17 sys/net/route.c:946
rt_ifa_add(ffff8000006cdd00,840100,ffff8000006cdd58,0) at rt_ifa_add+0x260 sys/net/route.c:1126
in_ifinit(ffff800000cce000,ffff8000006cdd00,ffff80002e89ee50,0) at in_ifinit+0x35d in_insert_prefix sys/netinet/in.c:796 [inline]
in_ifinit(ffff800000cce000,ffff8000006cdd00,ffff80002e89ee50,0) at in_ifinit+0x35d sys/netinet/in.c:729
in_ioctl_set_ifaddr(8020690c,ffff80002e89ee40,ffff800000cce000,1) at in_ioctl_set_ifaddr+0x268 sys/netinet/in.c:404
ifioctl(fffffd80705100d8,8020690c,ffff80002e89ee40,ffff8000216f7330) at ifioctl+0x1152 pru_control sys/sys/protosw.h:365 [inline]
ifioctl(fffffd80705100d8,8020690c,ffff80002e89ee40,ffff8000216f7330) at ifioctl+0x1152 sys/net/if.c:2345
sys_ioctl(ffff8000216f7330,ffff80002e89ef58,ffff80002e89efa0) at sys_ioctl+0x49e
syscall(ffff80002e89f020) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbf03aa406d0, count: 4
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