RDX: fffffffffffffee0 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000006dac20 R08: 0000000000000000 R09: 00000000000000b6
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c
R13: 00007faec64b7d90 R14: 0000000000000004 R15: 20c49ba5e353f7cf
==================================================================
BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:368 [inline]
BUG: KASAN: use-after-free in tls_push_record+0x1035/0x13b0 net/tls/tls_sw.c:220
Write of size 1 at addr ffff8880858e0000 by task syz-executor095/7973

CPU: 0 PID: 7973 Comm: syz-executor095 Not tainted 4.19.36 #4
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:368 [inline]
 tls_push_record+0x1035/0x13b0 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+0x5c5/0xaa0 net/tls/tls_main.c:271
 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472
 __sock_release+0xd3/0x2b0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1140
 __fput+0x2df/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/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+0x399/0x1d50 kernel/signal.c:2572
 do_signal+0x95/0x1950 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445c49
Code: Bad RIP value.
RSP: 002b:00007faec64b7d78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000004000 RBX: 00000000006dac28 RCX: 0000000000445c49
RDX: fffffffffffffee0 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000006dac20 R08: 0000000000000000 R09: 00000000000000b6
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c
R13: 00007faec64b7d90 R14: 0000000000000004 R15: 20c49ba5e353f7cf

The buggy address belongs to the page:
page:ffffea0002163800 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x1fffc0000000000()
raw: 01fffc0000000000 ffffea00021a2a08 ffff88812fffc878 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880858dff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880858dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880858e0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8880858e0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880858e0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================