IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
IPv6: NLM_F_CREATE should be set when creating new route
IPv6: NLM_F_CREATE should be set when creating new route
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9336 at drivers/net/netdevsim/fib.c:831 nsim_fib_event_nb+0xed8/0x1080
Modules linked in:
CPU: 1 UID: 0 PID: 9336 Comm: syz.2.450 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:nsim_fib_event_nb+0xed8/0x1080
Code: fa be 02 00 00 00 eb 0a e8 c5 33 a8 fa be 01 00 00 00 4c 89 f7 e8 88 98 b0 fd 4c 8b 64 24 08 e9 91 f4 ff ff e8 a9 33 a8 fa 90 <0f> 0b 90 e9 70 fb ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 35
RSP: 0018:ffffc9000438f008 EFLAGS: 00010283
RAX: ffffffff87177a67 RBX: 0000000000000002 RCX: 0000000000080000
RDX: ffffc90007ff9000 RSI: 0000000000001172 RDI: 0000000000001173
RBP: dffffc0000000000 R08: ffff88811252382f R09: 1ffff110224a4705
R10: dffffc0000000000 R11: ffffed10224a4706 R12: ffff888119cbf000
R13: ffffc9000438f180 R14: 0000000000000000 R15: ffffc9000438f198
FS:  00007fdf0de206c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001fc0 CR3: 00000001193ae000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 notifier_call_chain+0x1b6/0x3e0
 atomic_notifier_call_chain+0xda/0x180
 call_fib_notifiers+0x31/0x60
 call_fib6_multipath_entry_notifiers+0xe6/0x150
 inet6_rtm_newroute+0x12f5/0x18c0
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf0cf8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdf0de20038 EFLAGS: 00000246
 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fdf0d1c5fa0 RCX: 00007fdf0cf8ebe9
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007fdf0d011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdf0d1c6038 R14: 00007fdf0d1c5fa0 R15: 00007ffdca318588
 </TASK>
