TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
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BUG: KASAN: slab-out-of-bounds in __swab64p include/uapi/linux/swab.h:192 [inline]
BUG: KASAN: slab-out-of-bounds in __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline]
BUG: KASAN: slab-out-of-bounds in is_tx_ready include/net/tls.h:354 [inline]
BUG: KASAN: slab-out-of-bounds in tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236
Read of size 8 at addr ffff8801b820bff0 by task ksoftirqd/0/9

CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc4+ #227
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+0x1c4/0x2b4 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 __swab64p include/uapi/linux/swab.h:192 [inline]
 __be64_to_cpup include/uapi/linux/byteorder/little_endian.h:74 [inline]
 is_tx_ready include/net/tls.h:354 [inline]
 tls_write_space+0x29d/0x2d0 net/tls/tls_main.c:236
 tcp_new_space net/ipv4/tcp_input.c:5154 [inline]
 tcp_check_space+0x53f/0x920 net/ipv4/tcp_input.c:5165
 tcp_data_snd_check net/ipv4/tcp_input.c:5175 [inline]
 tcp_rcv_established+0xde8/0x2120 net/ipv4/tcp_input.c:5656
 tcp_v6_do_rcv+0x4b3/0x13c0 net/ipv6/tcp_ipv6.c:1326
 tcp_v6_rcv+0x2f7a/0x38a0 net/ipv6/tcp_ipv6.c:1555
 ip6_input_finish+0x3fc/0x1aa0 net/ipv6/ip6_input.c:384
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:427
 dst_input include/net/dst.h:450 [inline]
 ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ipv6_rcv+0x113/0x640 net/ipv6/ip6_input.c:272
 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4894
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5004
 process_backlog+0x217/0x760 net/core/dev.c:5808
 napi_poll net/core/dev.c:6228 [inline]
 net_rx_action+0x7c5/0x1950 net/core/dev.c:6294
 __do_softirq+0x30b/0xad8 kernel/softirq.c:292
 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653
 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

Allocated by task 5364:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696
 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137
 __alloc_skb+0x155/0x770 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:995 [inline]
 ndisc_alloc_skb+0x144/0x340 net/ipv6/ndisc.c:403
 ndisc_send_rs+0x331/0x6e0 net/ipv6/ndisc.c:669
 addrconf_rs_timer+0x3c0/0x6f0 net/ipv6/addrconf.c:3820
 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695
 __do_softirq+0x30b/0xad8 kernel/softirq.c:292

Freed by task 9:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xcf/0x230 mm/slab.c:3813
 skb_free_head+0x99/0xc0 net/core/skbuff.c:550
 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570
 skb_release_all+0x4a/0x60 net/core/skbuff.c:627
 __kfree_skb net/core/skbuff.c:641 [inline]
 kfree_skb+0x1bb/0x580 net/core/skbuff.c:659
 ip6_mc_input+0x775/0xd20 net/ipv6/ip6_input.c:507
 dst_input include/net/dst.h:450 [inline]
 ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ipv6_rcv+0x113/0x640 net/ipv6/ip6_input.c:272
 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4894
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5004
 process_backlog+0x217/0x760 net/core/dev.c:5808
 napi_poll net/core/dev.c:6228 [inline]
 net_rx_action+0x7c5/0x1950 net/core/dev.c:6294
 __do_softirq+0x30b/0xad8 kernel/softirq.c:292

The buggy address belongs to the object at ffff8801b820bc80
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 368 bytes to the right of
 512-byte region [ffff8801b820bc80, ffff8801b820be80)
The buggy address belongs to the page:
page:ffffea0006e082c0 count:1 mapcount:0 mapping:ffff8801da800940 index:0xffff8801b820b280
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006e10bc8 ffffea0006e713c8 ffff8801da800940
raw: ffff8801b820b280 ffff8801b820b000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b820be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801b820bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801b820bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff8801b820c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801b820c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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