8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
=====================================================
BUG: KMSAN: uninit-value in memcmp lib/string.c:926 [inline]
BUG: KMSAN: uninit-value in bcmp+0x139/0x190 lib/string.c:948
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d2/0x220 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x59/0xa0 mm/kmsan/kmsan_instr.c:215
 memcmp lib/string.c:926 [inline]
 bcmp+0x139/0x190 lib/string.c:948
 __hw_addr_add_ex net/core/dev_addr_lists.c:57 [inline]
 __dev_mc_add+0x1cd/0x8e0 net/core/dev_addr_lists.c:775
 dev_mc_add+0x6d/0x80 net/core/dev_addr_lists.c:792
 igmp6_group_added+0x2fc/0xb40 net/ipv6/mcast.c:670
 __ipv6_dev_mc_inc+0xe6d/0x1220 net/ipv6/mcast.c:930
 ipv6_dev_mc_inc+0x70/0x80 net/ipv6/mcast.c:937
 addrconf_join_solict net/ipv6/addrconf.c:2142 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3908 [inline]
 addrconf_dad_work+0x386/0x29f0 net/ipv6/addrconf.c:4035
 process_one_work+0x1517/0x1ee0 kernel/workqueue.c:2269
 worker_thread+0xed2/0x23f0 kernel/workqueue.c:2415
 kthread+0x515/0x550 kernel/kthread.c:292
 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0x9d/0x100 mm/kmsan/kmsan.c:310
 kmsan_memcpy_memmove_metadata+0x283/0x2f0 mm/kmsan/kmsan.c:247
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267
 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116
 __hw_addr_create_ex net/core/dev_addr_lists.c:33 [inline]
 __hw_addr_add_ex net/core/dev_addr_lists.c:76 [inline]
 __dev_mc_add+0x42e/0x8e0 net/core/dev_addr_lists.c:775
 dev_mc_add+0x6d/0x80 net/core/dev_addr_lists.c:792
 ip_mc_filter_add net/ipv4/igmp.c:1142 [inline]
 igmp_group_added+0x275/0xb90 net/ipv4/igmp.c:1328
 ____ip_mc_inc_group+0xeb6/0xf60 net/ipv4/igmp.c:1461
 __ip_mc_inc_group net/ipv4/igmp.c:1470 [inline]
 ip_mc_inc_group net/ipv4/igmp.c:1476 [inline]
 ip_mc_up+0x1c8/0x3f0 net/ipv4/igmp.c:1775
 inetdev_event+0x1da9/0x1e60 net/ipv4/devinet.c:1574
 notifier_call_chain kernel/notifier.c:83 [inline]
 __raw_notifier_call_chain kernel/notifier.c:361 [inline]
 raw_notifier_call_chain+0x130/0x250 kernel/notifier.c:368
 __dev_notify_flags+0x750/0xa70 net/core/dev.c:2027
 dev_change_flags+0x1d6/0x260 net/core/dev.c:8354
 dev_ifsioc+0x786/0xfe0 net/core/dev_ioctl.c:244
 dev_ioctl+0xa8c/0x1fb0 net/core/dev_ioctl.c:496
 sock_do_ioctl+0x3c7/0x5b0 net/socket.c:1071
 sock_ioctl+0x933/0xf20 net/socket.c:1199
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl fs/ioctl.c:753 [inline]
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl+0x2e9/0x410 fs/ioctl.c:760
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:760
 do_syscall_64+0x9d/0xe0 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Local variable ----buf.i@igmp_group_added created at:
 ip_mc_filter_add net/ipv4/igmp.c:1132 [inline]
 igmp_group_added+0x132/0xb90 net/ipv4/igmp.c:1328
 ip_mc_filter_add net/ipv4/igmp.c:1132 [inline]
 igmp_group_added+0x132/0xb90 net/ipv4/igmp.c:1328
=====================================================