WARNING: CPU: 0 PID: 13727 at net/ipv4/tcp_input.c:868 tcp_update_reordering+0x257/0x2c0 net/ipv4/tcp_input.c:868
device lo entered promiscuous mode
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 13727 Comm: syz-executor7 Not tainted 4.14.0-rc8-mm1+ #21
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+0x194/0x257 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+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:926
RIP: 0010:tcp_update_reordering+0x257/0x2c0 net/ipv4/tcp_input.c:868
RSP: 0018:ffff8801d802f5f8 EFLAGS: 00010212
RAX: 0000000000010000 RBX: ffff8801ccd9cf00 RCX: ffffffff843f38c7
RDX: 00000000000032c5 RSI: ffffc90004518000 RDI: ffff8801ccd9cf00
RBP: ffff8801d802f620 R08: ffff8801db41f4c0 R09: 1ffff1003b005e68
R10: ffff8801ccd9d8cc R11: 0000000026110c1b R12: 00000000fffffffa
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ccd9cf00
 tcp_sacktag_write_queue+0x17cd/0x22c0 net/ipv4/tcp_input.c:1841
 tcp_ack+0x2851/0x5150 net/ipv4/tcp_input.c:3625
 tcp_rcv_state_process+0xcbd/0x48c0 net/ipv4/tcp_input.c:5918
 tcp_v6_do_rcv+0x739/0x11b0 net/ipv6/tcp_ipv6.c:1331
 sk_backlog_rcv include/net/sock.h:909 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2264
 release_sock+0xa4/0x2a0 net/core/sock.c:2776
 inet_shutdown+0x1a8/0x350 net/ipv4/af_inet.c:853
 SYSC_shutdown net/socket.c:1903 [inline]
 SyS_shutdown+0x137/0x290 net/socket.c:1894
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452879
RSP: 002b:00007fc98f232be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000030
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000017
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee1d8
R13: 00000000ffffffff R14: 00007fc98f2336d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..