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
=====================================================
BUG: KMSAN: uninit-value in __ipv6_dev_mc_dec+0x68a/0xd30 net/ipv6/mcast.c:1014
 __ipv6_dev_mc_dec+0x68a/0xd30 net/ipv6/mcast.c:1014
 addrconf_leave_solict net/ipv6/addrconf.c:2254 [inline]
 __ipv6_ifa_notify+0xf97/0x1990 net/ipv6/addrconf.c:6302
 addrconf_ifdown+0x1c61/0x32e0 net/ipv6/addrconf.c:3981
 addrconf_notify+0x183/0x1d10 net/ipv6/addrconf.c:3780
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe0/0x410 kernel/notifier.c:453
 call_netdevice_notifiers_info+0x1ac/0x2b0 net/core/dev.c:2176
 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
 call_netdevice_notifiers net/core/dev.c:2228 [inline]
 dev_close_many+0x52a/0x8f0 net/core/dev.c:1731
 unregister_netdevice_many_notify+0x1106/0x4980 net/core/dev.c:11942
 unregister_netdevice_many+0x22/0x30 net/core/dev.c:12036
 cleanup_net+0xfce/0x1de0 net/core/net_namespace.c:649
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb9a/0x1d90 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x71/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable maddr.i created at:
 addrconf_leave_solict net/ipv6/addrconf.c:2248 [inline]
 __ipv6_ifa_notify+0xe6f/0x1990 net/ipv6/addrconf.c:6302
 addrconf_ifdown+0x1c61/0x32e0 net/ipv6/addrconf.c:3981

CPU: 0 UID: 0 PID: 3587 Comm: kworker/u8:12 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
=====================================================