TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop4' (ffff8880a4aa93e0): fill_kobj_path: path = '/devices/virtual/block/loop4'
Modules linked in:
CPU: 0 PID: 7294 Comm: syz-executor.5 Not tainted 4.14.145 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888097632340 task.stack: ffff88805ed48000
RIP: 0010:do_tcp_sendpages+0x33d/0x18f0 net/ipv4/tcp.c:967
RSP: 0018:ffff88805ed4f898 EFLAGS: 00010202
kobject: 'loop1' (ffff8880a494f260): kobject_uevent_env
RAX: 0000000000000010 RBX: 0000000000000000 RCX: ffffc90005e35000
RDX: 0000000000001210 RSI: ffffffff8523f1eb RDI: 0000000000000080
RBP: ffff88805ed4f9c0 R08: ffff888097632340 R09: 0000000000000001
R10: 0000000000000000 R11: ffff888097632340 R12: 0000000000005555
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880630e6bc0
FS:  00007fd980227700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop1' (ffff8880a494f260): fill_kobj_path: path = '/devices/virtual/block/loop1'
CR2: 0000000020004000 CR3: 0000000096a84000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop0' (ffff8880a49431e0): kobject_uevent_env
Call Trace:
 tls_push_sg+0x1e1/0x660 net/tls/tls_main.c:120
kobject: 'loop0' (ffff8880a49431e0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 tls_push_record+0xa4a/0x1210 net/tls/tls_sw.c:287
 tls_sw_sendmsg+0x8c9/0x1020 net/tls/tls_sw.c:501
kobject: 'loop1' (ffff8880a494f260): kobject_uevent_env
 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762
kobject: 'loop1' (ffff8880a494f260): fill_kobj_path: path = '/devices/virtual/block/loop1'
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 SYSC_sendto+0x206/0x310 net/socket.c:1763
kobject: 'loop3' (ffff8880a4a1d360): kobject_uevent_env
kobject: 'loop3' (ffff8880a4a1d360): fill_kobj_path: path = '/devices/virtual/block/loop3'
 SyS_sendto+0x40/0x50 net/socket.c:1731
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
kobject: 'loop4' (ffff8880a4aa93e0): kobject_uevent_env
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a09
kobject: 'loop4' (ffff8880a4aa93e0): fill_kobj_path: path = '/devices/virtual/block/loop4'
RSP: 002b:00007fd980226c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459a09
RDX: ffffffffffffffc1 RSI: 0000000020000080 RDI: 0000000000000007
RBP: 000000000075bf20 R08: 0000000000000000 R09: fffffffffffffe5b
R10: 0000000000000040 R11: 0000000000000246 R12: 00007fd9802276d4
R13: 00000000004c79b8 R14: 00000000004dd418 R15: 00000000ffffffff
Code: ff 
kobject: 'loop3' (ffff8880a4a1d360): kobject_uevent_env
ff 48 0f 44 d8 
kobject: 'loop3' (ffff8880a4a1d360): fill_kobj_path: path = '/devices/virtual/block/loop3'
e8 13 f1 38 fc 4d 85 e4 0f 84 9b 03 00 00 e8 05 f1 38 fc 48 8d bb 80 00 00 00 44 8b 65 a8 48 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 85 11 00 00 44 2b a3 80 
RIP: do_tcp_sendpages+0x33d/0x18f0 net/ipv4/tcp.c:967 RSP: ffff88805ed4f898
kobject: 'loop1' (ffff8880a494f260): kobject_uevent_env
---[ end trace d3b80355294637db ]---