TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
==================================================================
BUG: KASAN: use-after-free in tls_fill_prepend /./include/net/tls.h:372 [inline]
BUG: KASAN: use-after-free in tls_push_record+0x102a/0x13a0 /net/tls/tls_sw.c:220
Write of size 1 at addr ffff888079028000 by task syz-executor552/8577

CPU: 0 PID: 8577 Comm: syz-executor552 Not tainted 4.19.60 #33
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+0x172/0x1f0 /lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d /mm/kasan/report.c:256
 kasan_report_error /mm/kasan/report.c:354 [inline]
 kasan_report /mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x8c/0x2ba /mm/kasan/report.c:396
 __asan_report_store1_noabort+0x17/0x20 /mm/kasan/report.c:435
 tls_fill_prepend /./include/net/tls.h:372 [inline]
 tls_push_record+0x102a/0x13a0 /net/tls/tls_sw.c:220
 tls_sw_push_pending_record+0x23/0x30 /net/tls/tls_sw.c:257
 tls_handle_open_record /net/tls/tls_main.c:156 [inline]
 tls_sk_proto_close+0x5bb/0xa20 /net/tls/tls_main.c:271
 inet_release+0xff/0x1e0 /net/ipv4/af_inet.c:428
 inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:472
 __sock_release+0xce/0x2a0 /net/socket.c:579
 sock_close+0x1b/0x30 /net/socket.c:1140
 __fput+0x2dd/0x8b0 /fs/file_table.c:278
 ____fput+0x16/0x20 /fs/file_table.c:309
 task_work_run+0x145/0x1c0 /kernel/task_work.c:113
 exit_task_work /./include/linux/task_work.h:22 [inline]
 do_exit+0x933/0x2fa0 /kernel/exit.c:876
 do_group_exit+0x135/0x370 /kernel/exit.c:979
 get_signal+0x3ec/0x1fc0 /kernel/signal.c:2574
 do_signal+0x95/0x1960 /arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 /arch/x86/entry/common.c:163
 prepare_exit_to_usermode /arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath /arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 /arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4469a9
Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007faf5e004da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 00000000004469a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea0001e40a00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x1fffc0000000000()
raw: 01fffc0000000000 ffffea0002065608 ffffea0002646408 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888079027f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888079027f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888079028000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888079028080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888079028100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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