bridge0: port 2(bridge_slave_1) entered disabled state
bridge_slave_0: left allmulticast mode
bridge_slave_0: left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at net/ipv6/route.c:4856 rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4856
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc1-syzkaller-00102-g5466491c9e33 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:rt6_multipath_rebalance+0x455/0x8b0 net/ipv6/route.c:4856
Code: ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 85 fe ff ff 4c 89 e7 e8 dd 82 06 f8 e9 78 fe ff ff e8 f3 0b a3 f7 eb 05 e8 ec 0b a3 f7 90 <0f> 0b 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 85 a6 4b 01
RSP: 0018:ffffc90000116f60 EFLAGS: 00010293
RAX: ffffffff8a1d52fd RBX: ffff888031ec2c00 RCX: ffff88801d2a5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000022de4 R12: ffff888031ec2cde
R13: ffff888031ec2c90 R14: 0000000000000000 R15: 1ffff110063d8592
FS:  0000000000000000(0000) GS:ffff888125c52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2ca7735d58 CR3: 000000005d87c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fib6_ifdown+0x401/0x4c0 net/ipv6/route.c:4976
 fib6_clean_node+0x24a/0x590 net/ipv6/ip6_fib.c:2252
 fib6_walk_continue+0x67b/0x910 net/ipv6/ip6_fib.c:2177
 fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2225
 fib6_clean_tree net/ipv6/ip6_fib.c:2305 [inline]
 __fib6_clean_all+0x234/0x380 net/ipv6/ip6_fib.c:2321
 rt6_sync_down_dev net/ipv6/route.c:5004 [inline]
 rt6_disable_ip+0x120/0x720 net/ipv6/route.c:5009
 addrconf_ifdown+0x15d/0x1880 net/ipv6/addrconf.c:3857
 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:2268 [inline]
 call_netdevice_notifiers net/core/dev.c:2282 [inline]
 dev_close_many+0x29c/0x410 net/core/dev.c:1785
 unregister_netdevice_many_notify+0x834/0x2320 net/core/dev.c:12047
 ops_exit_rtnl_list net/core/net_namespace.c:188 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:249
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:686
 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>