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 sg_mark_end include/linux/scatterlist.h:190 [inline]
BUG: KASAN: slab-out-of-bounds in tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255
Read of size 8 at addr ffff8880ae52e438 by task syz-executor.5/19785

CPU: 1 PID: 19785 Comm: syz-executor.5 Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 sg_mark_end include/linux/scatterlist.h:190 [inline]
 tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255
 tls_handle_open_record net/tls/tls_main.c:158 [inline]
 tls_sk_proto_close+0x6f0/0x8b0 net/tls/tls_main.c:270
 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:450
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x41940b
RSP: 002b:00007ffd1e4427f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000000041940b
RDX: 0000000000000000 RSI: 0000000008d240e1 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2d127e3c
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000056c9e0
R13: 000000000056c9e0 R14: 000000000056bf60 R15: 00000000000f71a9

Allocated by task 19792:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 tls_set_sw_offload+0x88/0xcd0 net/tls/tls_sw.c:683
 do_tls_setsockopt_tx net/tls/tls_main.c:443 [inline]
 do_tls_setsockopt net/tls/tls_main.c:468 [inline]
 tls_setsockopt+0x216/0x3f0 net/tls/tls_main.c:486
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 19464:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 blk_mq_free_rq_map+0x89/0xf0 block/blk-mq.c:1795
 blk_mq_sched_free_tags block/blk-mq-sched.c:428 [inline]
 blk_mq_sched_exit_hctx+0x192/0x230 block/blk-mq-sched.c:503
 blk_mq_exit_hctx+0x18e/0x3a0 block/blk-mq.c:1974
 blk_mq_exit_hw_queues block/blk-mq.c:1996 [inline]
 blk_mq_free_queue+0x33b/0x4a0 block/blk-mq.c:2495
 blk_cleanup_queue+0x3df/0x620 block/blk-core.c:687
 nbd_dev_remove drivers/block/nbd.c:218 [inline]
 nbd_put.part.0+0xb8/0x140 drivers/block/nbd.c:231
 nbd_put drivers/block/nbd.c:228 [inline]
 nbd_genl_connect+0xfa9/0x1400 drivers/block/nbd.c:1896
 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff8880ae52e440
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 8 bytes to the left of
 2048-byte region [ffff8880ae52e440, ffff8880ae52ec40)
The buggy address belongs to the page:
page:ffffea0002b94b80 count:1 mapcount:0 mapping:ffff8880ae52e440 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff8880ae52e440 0000000000000000 0000000100000003
raw: ffffea0002b94aa0 ffffea0002b966a0 ffff88813fe80c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880ae52e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880ae52e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880ae52e400: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                                        ^
 ffff8880ae52e480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880ae52e500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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