RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 0000000000000006 R08: 0000000000000000 R09: 00000000000000d8
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 00007fff5874d23f R14: 00007f9e63f5d9c0 R15: 00000000006dfc4c
==================================================================
BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:373 [inline]
BUG: KASAN: use-after-free in tls_push_record+0x1007/0x1380 net/tls/tls_sw.c:220
Write of size 1 at addr ffff8880a0cc0000 by task syz-executor351/6662

CPU: 0 PID: 6662 Comm: syz-executor351 Not tainted 4.19.114-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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x212 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+0x88/0x2b9 mm/kasan/report.c:396
 tls_fill_prepend include/net/tls.h:373 [inline]
 tls_push_record+0x1007/0x1380 net/tls/tls_sw.c:220
 tls_handle_open_record net/tls/tls_main.c:156 [inline]
 tls_sk_proto_close+0x641/0xb20 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:579
 sock_close+0x15/0x20 net/socket.c:1140
 __fput+0x2cd/0x890 fs/file_table.c:278
 task_work_run+0x13f/0x1b0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xbcd/0x2f30 kernel/exit.c:880
 do_group_exit+0x125/0x350 kernel/exit.c:983
 get_signal+0x3ec/0x1f90 kernel/signal.c:2588
 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x22b/0x2b0 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: 0033:0x449299
Code: Bad RIP value.
RSP: 002b:00007f9e63f5cca8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000004000 RBX: 00007f9e63f5ccc0 RCX: 0000000000449299
RDX: 00000000e0ffffff RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 0000000000000006 R08: 0000000000000000 R09: 00000000000000d8
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 00007fff5874d23f R14: 00007f9e63f5d9c0 R15: 00000000006dfc4c

The buggy address belongs to the page:
page:ffffea0002833000 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000000()
raw: 00fffe0000000000 ffffea000293d608 ffffea000222ba08 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a0cbff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880a0cbff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880a0cc0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8880a0cc0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880a0cc0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================