syzbot

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BUG: KMSAN: uninit-value in __ipv6_dev_mc_inc+0x4f0/0x1640 net/ipv6/mcast.c:966
 __ipv6_dev_mc_inc+0x4f0/0x1640 net/ipv6/mcast.c:966
 ipv6_dev_mc_inc+0x38/0x50 net/ipv6/mcast.c:997
 addrconf_join_solict net/ipv6/addrconf.c:2242 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:4100 [inline]
 addrconf_dad_work+0x401/0x1d10 net/ipv6/addrconf.c:4228
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd59/0xf00 kernel/kthread.c:464
 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable maddr.i.i created at:
 addrconf_join_solict net/ipv6/addrconf.c:2236 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:4100 [inline]
 addrconf_dad_work+0x244/0x1d10 net/ipv6/addrconf.c:4228
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319

CPU: 1 UID: 0 PID: 3845 Comm: kworker/u8:19 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: ipv6_addrconf addrconf_dad_work
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