netdevsim netdevsim2 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim2 ÿÿÿÿÿÿ (unregistering): unset [0, 0] type 1 family 0 port 8472 - 0
netdevsim netdevsim2 ÿÿÿÿÿÿ (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 13025 at net/ipv6/route.c:4857 rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4857
Modules linked in:
CPU: 0 UID: 0 PID: 13025 Comm: kworker/u8:19 Not tainted 6.16.0-syzkaller-06574-gd9104cec3e8f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4857
Code: ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 85 fe ff ff 4c 89 e7 e8 8d c4 fb f7 e9 78 fe ff ff e8 23 a2 98 f7 eb 05 e8 1c a2 98 f7 90 <0f> 0b 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc9001cb46fc0 EFLAGS: 00010293
RAX: ffffffff8a270e8d RBX: ffff88805855d800 RCX: ffff88802c9d5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52003968df0 R12: ffff888023a384de
R13: ffff88805855d890 R14: 0000000000000000 R15: 1ffff1100b0abb12
FS:  0000000000000000(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f1b3f84c0 CR3: 000000000df38000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 fib6_ifdown+0x401/0x4c0 net/ipv6/route.c:4977
 fib6_clean_node+0x24a/0x590 net/ipv6/ip6_fib.c:2246
 fib6_walk_continue+0x678/0x910 net/ipv6/ip6_fib.c:2171
 fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2219
 fib6_clean_tree net/ipv6/ip6_fib.c:2299 [inline]
 __fib6_clean_all+0x234/0x380 net/ipv6/ip6_fib.c:2315
 rt6_sync_down_dev net/ipv6/route.c:5005 [inline]
 rt6_disable_ip+0x120/0x720 net/ipv6/route.c:5010
 addrconf_ifdown+0x15d/0x1880 net/ipv6/addrconf.c:3853
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 netif_close_many+0x29c/0x410 net/core/dev.c:1784
 unregister_netdevice_many_notify+0x7b9/0x1ff0 net/core/dev.c:12126
 ops_exit_rtnl_list net/core/net_namespace.c:186 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:247
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>