==================================================================
BUG: KASAN: out-of-bounds in tls_fill_prepend include/net/tls.h:379 [inline]
BUG: KASAN: out-of-bounds in tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220
Write of size 1 at addr ffff88804acf8000 by task syz-executor.5/13499

CPU: 0 PID: 13499 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
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+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_store1_noabort+0x88/0x90 mm/kasan/report.c:435
 tls_fill_prepend include/net/tls.h:379 [inline]
 tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220
 tls_handle_open_record net/tls/tls_main.c:156 [inline]
 tls_sk_proto_close+0x8cf/0xc20 net/tls/tls_main.c:271
 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:472
 __sock_release+0xcd/0x2a0 net/socket.c:599
 sock_close+0x15/0x20 net/socket.c:1214
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 get_signal+0x1b64/0x1f70 kernel/signal.c:2400
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
 exit_to_usermode_loop+0x204/0x2a0 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+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0dc0960059
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0dbf2d5168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000004000 RBX: 00007f0dc0a72f60 RCX: 00007f0dc0960059
RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000005
RBP: 00007f0dbf2d51d0 R08: 0000000000000000 R09: 00000000000000d8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe005e555f R14: 00007f0dbf2d5300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea00012b3e00 count:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfff00000000000()
raw: 00fff00000000000 dead000000000100 dead000000000200 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88804acf7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88804acf7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88804acf8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffff88804acf8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804acf8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================