netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
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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+0x10a9/0x1400 net/tls/tls_sw.c:222
Write of size 1 at addr ffff88019e528000 by task syz-executor7/19137

CPU: 1 PID: 19137 Comm: syz-executor7 Not tainted 4.18.0-rc8+ #178
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+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435
 tls_fill_prepend include/net/tls.h:373 [inline]
 tls_push_record+0x10a9/0x1400 net/tls/tls_sw.c:222
 tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:259
 tls_handle_open_record net/tls/tls_main.c:155 [inline]
 tls_sk_proto_close+0x759/0xb90 net/tls/tls_main.c:255
 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428
 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:457
 __sock_release+0xd7/0x250 net/socket.c:598
 sock_close+0x19/0x20 net/socket.c:1158
 __fput+0x355/0x8b0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113
 get_signal+0x1559/0x1970 kernel/signal.c:2298
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e0/0x370 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+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456d89
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007fd7cd382c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 0000000000000001 RBX: 00007fd7cd3836d4 RCX: 0000000000456d89
RDX: 0000000000000001 RSI: 0000000020005f00 RDI: 0000000000000004
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00000000004d34d8 R14: 00000000004c8247 R15: 0000000000000003

The buggy address belongs to the page:
page:ffffea0006794a00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 ffffea00065d9008 ffffea00067e0008 0000000000000000
raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88019e527f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88019e527f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88019e528000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88019e528080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88019e528100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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