KMSAN: uninit-value in __ipv6_dev_mc

IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
=====================================================
BUG: KMSAN: uninit-value in __ipv6_dev_mc_inc+0x65a/0x1620 net/ipv6/mcast.c:927
 __ipv6_dev_mc_inc+0x65a/0x1620 net/ipv6/mcast.c:927
 ipv6_dev_mc_inc+0x70/0x80 net/ipv6/mcast.c:957
 addrconf_join_solict net/ipv6/addrconf.c:2179 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3958 [inline]
 addrconf_dad_work+0x736/0x2210 net/ipv6/addrconf.c:4085
 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298
 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445
 kthread+0x721/0x850 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

Local variable maddr.i.i created at:
 addrconf_join_solict net/ipv6/addrconf.c:2173 [inline]
 addrconf_dad_begin net/ipv6/addrconf.c:3958 [inline]
 addrconf_dad_work+0x32c/0x2210 net/ipv6/addrconf.c:4085
 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298

CPU: 0 PID: 12210 Comm: kworker/0:1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
=====================================================

Crashes (14):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2022/02/16 06:49	https://github.com/google/kmsan.git master	85cfd6e539bd	8b9ca619	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/02/15 02:08	https://github.com/google/kmsan.git master	85cfd6e539bd	8b9ca619	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/02/06 13:24	https://github.com/google/kmsan.git master	85cfd6e539bd	a7dab638	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/29 06:20	https://github.com/google/kmsan.git master	85cfd6e539bd	495e00c5	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/28 14:07	https://github.com/google/kmsan.git master	85cfd6e539bd	495e00c5	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/28 13:07	https://github.com/google/kmsan.git master	85cfd6e539bd	495e00c5	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/22 06:12	https://github.com/google/kmsan.git master	85cfd6e539bd	214351e1	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/21 12:17	https://github.com/google/kmsan.git master	85cfd6e539bd	ab3d9f17	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2022/01/18 07:37	https://github.com/google/kmsan.git master	fa3879a274df	731a2d23	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2021/12/26 16:37	https://github.com/google/kmsan.git master	81c325bbf94e	e4f103c4	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2021/12/19 15:16	https://github.com/google/kmsan.git master	b0a8b5053e8b	44068e19	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2021/12/17 01:18	https://github.com/google/kmsan.git master	d7f51389fa36	8dd6a5e3	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2021/12/14 10:26	https://github.com/google/kmsan.git master	d82a8a8ca942	5d14b1ea	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc
2021/12/10 09:44	https://github.com/google/kmsan.git master	8b936c96768e	4d4ce9bc	.config	console log	report	info	ci-upstream-kmsan-gce-386	KMSAN: uninit-value in __ipv6_dev_mc_inc

Crashes (14):

Time

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