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BUG: KMSAN: uninit-value in do_slab_free mm/slub.c:3016 [inline]
BUG: KMSAN: uninit-value in slab_free mm/slub.c:3039 [inline]
BUG: KMSAN: uninit-value in kmem_cache_free+0x3df/0x2b70 mm/slub.c:3054
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0-rc3+ #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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
 do_slab_free mm/slub.c:3016 [inline]
 slab_free mm/slub.c:3039 [inline]
 kmem_cache_free+0x3df/0x2b70 mm/slub.c:3054
 kfree_skbmem net/core/skbuff.c:644 [inline]
 __kfree_skb+0x1dd/0x210 net/core/skbuff.c:680
 consume_skb+0x2b0/0x2e0 net/core/skbuff.c:838
 packet_rcv+0x242/0x2190 net/packet/af_packet.c:2146
 dev_queue_xmit_nit+0x1125/0x1200 net/core/dev.c:2077
 xmit_one net/core/dev.c:3276 [inline]
 dev_hard_start_xmit+0x21e/0xab0 net/core/dev.c:3296
 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3869
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3902
 neigh_hh_output include/net/neighbour.h:500 [inline]
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x2089/0x2670 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x83d/0x8f0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x2db/0x420 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x5d3/0x720 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x1083/0x15e0 net/ipv6/ndisc.c:504
 ndisc_send_rs+0xb5d/0xb90 net/ipv6/ndisc.c:698
 addrconf_rs_timer+0x847/0xc20 net/ipv6/addrconf.c:3878
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 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]
 slab_alloc mm/slub.c:2799 [inline]
 kmem_cache_alloc+0xade/0xd10 mm/slub.c:2804
 skb_clone+0x326/0x5d0 net/core/skbuff.c:1448
 dev_queue_xmit_nit+0x539/0x1200 net/core/dev.c:2045
 xmit_one net/core/dev.c:3276 [inline]
 dev_hard_start_xmit+0x21e/0xab0 net/core/dev.c:3296
 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3869
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3902
 neigh_hh_output include/net/neighbour.h:500 [inline]
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0x2089/0x2670 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x83d/0x8f0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x2db/0x420 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x5d3/0x720 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x1083/0x15e0 net/ipv6/ndisc.c:504
 ndisc_send_rs+0xb5d/0xb90 net/ipv6/ndisc.c:698
 addrconf_rs_timer+0x847/0xc20 net/ipv6/addrconf.c:3878
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 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
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
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