RDX: 00000000fffffece RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c102c0d80
R13: 0000000000000005 R14: 0000000000000000 R15: f200dce948faf935
==================================================================
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 ffff8880835f0000 by task syz-executor478/7896

CPU: 1 PID: 7896 Comm: syz-executor478 Not tainted 4.19.56 #28
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: 0033:0x445cb9
Code: Bad RIP value.
RSP: 002b:00007f0c102c0d68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000004000 RBX: 00000000006dbc28 RCX: 0000000000445cb9
RDX: 00000000fffffece RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c102c0d80
R13: 0000000000000005 R14: 0000000000000000 R15: f200dce948faf935

The buggy address belongs to the page:
page:ffffea00020d7c00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x1fffc0000000000()
raw: 01fffc0000000000 ffffea0002964608 ffff88812fffc878 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880835eff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880835eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880835f0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8880835f0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880835f0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================