RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000020000000 R09: 000000000000001c
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000004d4260 R14: 00000000004c8bcf R15: 0000000000000007
==================================================================
BUG: KASAN: use-after-free in tls_fill_prepend include/net/tls.h:369 [inline]
BUG: KASAN: use-after-free in tls_push_record+0x10a9/0x1400 net/tls/tls_sw.c:214
Write of size 1 at addr ffff88019a528000 by task syz-executor5/10174

sctp: [Deprecated]: syz-executor2 (pid 10195) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
CPU: 0 PID: 10174 Comm: syz-executor5 Not tainted 4.19.0-rc1+ #75
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+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435
 tls_fill_prepend include/net/tls.h:369 [inline]
 tls_push_record+0x10a9/0x1400 net/tls/tls_sw.c:214
 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:251
protocol 88a8 is buggy, dev gre0
 tls_handle_open_record net/tls/tls_main.c:156 [inline]
 tls_sk_proto_close+0x759/0xb90 net/tls/tls_main.c:261
protocol 88a8 is buggy, dev gre0
protocol 88a8 is buggy, dev gre0
 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428
 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:457
protocol 88a8 is buggy, dev gre0
 __sock_release+0xd7/0x250 net/socket.c:579
 sock_close+0x19/0x20 net/socket.c:1139
 __fput+0x36e/0x8c0 fs/file_table.c:278
protocol 88a8 is buggy, dev gre0
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
protocol 88a8 is buggy, dev gre0
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x410c41
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffdf6385cb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000410c41
RDX: 0000001b33420000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 00007ffdf6385be0 R11: 0000000000000293 R12: 0000000000000008
R13: 0000000000026102 R14: 0000000000000057 R15: badc0ffeebadface

The buggy address belongs to the page:
page:ffffea0006694a00 count:1 mapcount:0 mapping:ffff8801dac00ac0 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffffea0006620988 ffffea0006694a88 ffff8801dac00ac0
raw: 0000000000000000 ffff88019a528000 0000000100000007 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88019a527f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88019a527f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88019a528000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88019a528080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88019a528100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================