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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2749 [inline]
BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828
CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 5.3.0-rc3+ #16
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294
 slab_alloc_node mm/slub.c:2749 [inline]
 kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1056 [inline]
 nlmsg_new include/net/netlink.h:889 [inline]
 inet6_ifa_notify net/ipv6/addrconf.c:5351 [inline]
 __ipv6_ifa_notify+0x35e/0x1a40 net/ipv6/addrconf.c:5961
 ipv6_ifa_notify net/ipv6/addrconf.c:6007 [inline]
 addrconf_dad_completed+0x1ed/0x1490 net/ipv6/addrconf.c:4157
 addrconf_dad_work+0x17b3/0x26e0 net/ipv6/addrconf.c:4106
 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 stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:187 [inline]
 kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:345
 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:190
 ___slab_alloc+0x1dbc/0x1fb0 mm/slub.c:2634
 __slab_alloc mm/slub.c:2687 [inline]
 slab_alloc_node mm/slub.c:2750 [inline]
 kmem_cache_alloc_node+0x769/0xe70 mm/slub.c:2828
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1056 [inline]
 ndisc_alloc_skb+0x1ba/0x5b0 net/ipv6/ndisc.c:416
 ndisc_send_rs+0x488/0xb90 net/ipv6/ndisc.c:682
 addrconf_dad_completed+0xc03/0x1490 net/ipv6/addrconf.c:4195
 addrconf_dad_work+0x17b3/0x26e0 net/ipv6/addrconf.c:4106
 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:187 [inline]
 kmsan_internal_poison_shadow+0x53/0xa0 mm/kmsan/kmsan.c:146
 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:195
 slab_free_freelist_hook mm/slub.c:1472 [inline]
 slab_free mm/slub.c:3038 [inline]
 kmem_cache_free_bulk+0x3ad9/0x3f50 mm/slub.c:3163
 __kfree_skb_flush+0xb0/0x100 net/core/skbuff.c:862
 net_rx_action+0x1908/0x1950 net/core/dev.c:6436
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 do_IRQ+0x20d/0x3a0 arch/x86/kernel/irq.c:259
 ret_from_intr+0x0/0x33
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