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BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:373 [inline]
BUG: KASAN: use-after-free in tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220
Write of size 1 at addr ffff888088ef8000 by task syz-executor980/6669

CPU: 0 PID: 6669 Comm: syz-executor980 Not tainted 4.19.132-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/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 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:373 [inline]
 tls_push_record+0x104c/0x1370 net/tls/tls_sw.c:220
 tls_push_pending_closed_record net/tls/tls_main.c:203 [inline]
 tls_push_pending_closed_record net/tls/tls_main.c:196 [inline]
 tls_complete_pending_work include/net/tls.h:303 [inline]
 tls_sk_proto_close+0x907/0xc20 net/tls/tls_main.c:270
 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:579
 sock_close+0x15/0x20 net/socket.c:1140
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbb2/0x2b70 kernel/exit.c:887
 do_group_exit+0x125/0x310 kernel/exit.c:990
 get_signal+0x3f2/0x1f70 kernel/signal.c:2588
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821
 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: 0033:0x448e19
Code: Bad RIP value.
RSP: 002b:00007f4784f73d68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000004000 RBX: 00000000006dfc28 RCX: 0000000000448e19
RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000006dfc20 R08: 0000000000000000 R09: 00000000000000d8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4784f73d80
R13: 0000000000000005 R14: 008f60cc2a9f2fbd R15: af00182a00000000

The buggy address belongs to the page:
page:ffffea000223be00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 ffffea000290bc08 ffffea000227ca08 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888088ef7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888088ef7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888088ef8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888088ef8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888088ef8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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