------------[ cut here ]------------
WARNING: CPU: 3 PID: 20506 at net/core/stream.c:204 sk_stream_kill_queues+0x3b4/0x520
Kernel panic - not syncing: panic_on_warn set ...

CPU: 3 PID: 20506 Comm: syz-executor6 Not tainted 4.14.0-rc4 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 dump_stack+0x115/0x1da
 panic+0x1b4/0x3a7
 __warn+0x1c4/0x1d9
 report_bug+0x211/0x2d0
 fixup_bug+0x40/0x90
 do_trap+0x260/0x390
 do_error_trap+0x11c/0x350
 do_invalid_op+0x1b/0x20
 invalid_op+0x18/0x20
RIP: 0010:sk_stream_kill_queues+0x3b4/0x520
RSP: 0018:ffff8800b1707228 EFLAGS: 00010297
RAX: ffff8800b78c8000 RBX: ffff8800b34dc080 RCX: ffff8800b17070a8
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff8800b34dc2e0
RBP: ffff8800b1707268 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8800b34dc298 R14: ffffffffb94391e0 R15: ffff8800b34dc1d0
 inet_csk_destroy_sock+0x175/0x3f0
 tcp_close+0x8a6/0xfc0
 inet_release+0xed/0x1c0
 sock_release+0x8d/0x1e0
 sock_close+0x16/0x20
 __fput+0x333/0x7f0
 ____fput+0x15/0x20
 task_work_run+0x199/0x270
 do_exit+0x9ca/0x1af0
 do_group_exit+0x149/0x400
 get_signal+0x73f/0x1690
 do_signal+0x94/0x1ee0
 exit_to_usermode_loop+0x187/0x210
 syscall_return_slowpath+0x2de/0x3b0
 entry_SYSCALL_64_fastpath+0xbc/0xbe
RIP: 0033:0x452349
RSP: 002b:00007ffd866de138 EFLAGS: 00000206 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000005fc1f RCX: 0000000000452349
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000009680d4
RBP: 00000000009680d4 R08: 0000000000000188 R09: 0000000000000000
R10: 00007ffd866de140 R11: 0000000000000206 R12: 0000000000000014
R13: 0000000000000003 R14: 000000000005fbe5 R15: 0000000000000016
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: 0x33400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..