WARNING: CPU: 0 PID: 12956 at net/ipv4/tcp_input.c:2199 tcp_mark_head_lost+0x770/0x8f0 net/ipv4/tcp_input.c:2199
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12956 Comm: syz-executor4 Not tainted 4.16.0-rc3+ #337
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x24d lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:tcp_mark_head_lost+0x770/0x8f0 net/ipv4/tcp_input.c:2199
RSP: 0018:ffff8801cbc670e0 EFLAGS: 00010216
RAX: 0000000000010000 RBX: 0000000000000006 RCX: ffffffff84c63c90
RDX: 0000000000007f04 RSI: ffffc90002946000 RDI: ffff8801d6d7fdb4
RBP: ffff8801cbc67160 R08: 0000000000000000 R09: ffff8801cbc674d0
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8801d6d7f500
R13: dffffc0000000000 R14: ffff8801d87e4cf5 R15: 0000000000000001
 tcp_update_scoreboard net/ipv4/tcp_input.c:2213 [inline]
 tcp_fastretrans_alert+0x193d/0x2260 net/ipv4/tcp_input.c:2857
 tcp_ack+0x2b5c/0x51a0 net/ipv4/tcp_input.c:3627
 tcp_rcv_established+0x8d1/0x1be0 net/ipv4/tcp_input.c:5465
 tcp_v4_do_rcv+0x2ab/0x7d0 net/ipv4/tcp_ipv4.c:1469
 sk_backlog_rcv include/net/sock.h:908 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2271
 release_sock+0xa4/0x2a0 net/core/sock.c:2786
 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1464
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 sock_write_iter+0x31a/0x5d0 net/socket.c:909
 call_write_iter include/linux/fs.h:1781 [inline]
 do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653
 do_iter_write+0x154/0x540 fs/read_write.c:932
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453d69
RSP: 002b:00007f02b8866c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f02b88676d4 RCX: 0000000000453d69
RDX: 0000000000000001 RSI: 0000000020698ff0 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000067a R14: 00000000006f9c10 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..