=====================================================
BUG: KMSAN: uninit-value in rxrpc_send_keepalive+0x2fa/0x830 net/rxrpc/output.c:655
CPU: 1 PID: 11134 Comm: kworker/1:4 Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krxrpcd rxrpc_peer_keepalive_worker
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 kernel_sendmsg+0x2c9/0x440 net/socket.c:677
 rxrpc_send_keepalive+0x2fa/0x830 net/rxrpc/output.c:655
 rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:369 [inline]
 rxrpc_peer_keepalive_worker+0xb82/0x1510 net/rxrpc/peer_event.c:430
 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline]
 kmsan_internal_poison_shadow+0x53/0x100 mm/kmsan/kmsan.c:134
 kmsan_slab_alloc+0xaa/0x120 mm/kmsan/kmsan_hooks.c:103
 slab_alloc_node mm/slub.c:2790 [inline]
 slab_alloc mm/slub.c:2799 [inline]
 kmem_cache_alloc_trace+0x8c5/0xd20 mm/slub.c:2816
 kmalloc include/linux/slab.h:552 [inline]
 __hw_addr_create_ex net/core/dev_addr_lists.c:30 [inline]
 __hw_addr_add_ex net/core/dev_addr_lists.c:76 [inline]
 __dev_mc_add+0x38b/0x8e0 net/core/dev_addr_lists.c:766
 dev_mc_add+0x6d/0x80 net/core/dev_addr_lists.c:783
 igmp6_group_added+0x2d4/0xac0 net/ipv6/mcast.c:672
 __ipv6_dev_mc_inc+0xdc5/0xfa0 net/ipv6/mcast.c:931
 ipv6_dev_mc_inc+0x70/0x80 net/ipv6/mcast.c:938
 ipv6_add_dev+0x1da4/0x1f80 net/ipv6/addrconf.c:456
 addrconf_notify+0x8a7/0x57c0 net/ipv6/addrconf.c:3491
 notifier_call_chain kernel/notifier.c:95 [inline]
 __raw_notifier_call_chain kernel/notifier.c:396 [inline]
 raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:403
 call_netdevice_notifiers_info net/core/dev.c:1749 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:1761 [inline]
 call_netdevice_notifiers net/core/dev.c:1775 [inline]
 register_netdevice+0x2126/0x2690 net/core/dev.c:8757
 veth_newlink+0x10e4/0x13b0 drivers/net/veth.c:1329
 __rtnl_newlink net/core/rtnetlink.c:3196 [inline]
 rtnl_newlink+0x2a73/0x38d0 net/core/rtnetlink.c:3254
 rtnetlink_rcv_msg+0x115a/0x1580 net/core/rtnetlink.c:5223
 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5241
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0xf6c/0x1050 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x110f/0x1330 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 ___sys_sendmsg+0x14ff/0x1590 net/socket.c:2311
 __sys_sendmsg net/socket.c:2356 [inline]
 __do_sys_sendmsg net/socket.c:2365 [inline]
 __se_sys_sendmsg+0x305/0x460 net/socket.c:2363
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2363
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
=====================================================