invalid inflight: 1 state 4 cwnd 10 mss 1428
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7031 at net/ipv4/tcp_output.c:2507 tcp_send_loss_probe.cold+0x83/0xa2 net/ipv4/tcp_output.c:2507
kobject: 'loop4' (ffff8880a4a0d220): kobject_uevent_env
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7031 Comm: syz-executor.4 Not tainted 4.14.143 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x197 lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 kernel/panic.c:546
kobject: 'loop4' (ffff8880a4a0d220): fill_kobj_path: path = '/devices/virtual/block/loop4'
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:tcp_send_loss_probe.cold+0x83/0xa2 net/ipv4/tcp_output.c:2507
RSP: 0018:ffff8880aef07cb8 EFLAGS: 00010282
RAX: 000000000000002c RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff866d10e0 RDI: ffffed1015de0f8d
RBP: ffff8880aef07ce8 R08: 000000000000002c R09: ffff8880627a4e88
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888061436000
R13: 0000000000000001 R14: 0000000000000594 R15: 000000000000000a
kobject: 'loop2' (ffff8880a497cf20): kobject_uevent_env
 tcp_write_timer_handler+0x4a8/0x7e0 net/ipv4/tcp_timer.c:575
 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
kobject: 'loop2' (ffff8880a497cf20): fill_kobj_path: path = '/devices/virtual/block/loop2'
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1634 [inline]
 __run_timers kernel/time/timer.c:1602 [inline]
 run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:memcmp+0x48/0xc0 lib/string.c:861
RSP: 0018:ffff8880627af6f0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: ffff8880627af7fa RCX: 0000000000000001
kobject: 'loop3' (ffff8880a49b2920): kobject_uevent_env
RDX: 0000000000000002 RSI: ffff888059addf4a RDI: ffff8880627af798
RBP: ffff8880627af718 R08: 00000000fef4ee0a R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880627a45c0 R12: dffffc0000000000
R13: ffff8880627af828 R14: 0000000000000012 R15: ffff888059added0
 find_stack lib/stackdepot.c:176 [inline]
 depot_save_stack+0x11c/0x410 lib/stackdepot.c:225
 save_stack+0xa9/0xd0 mm/kasan/kasan.c:453
kobject: 'loop3' (ffff8880a49b2920): fill_kobj_path: path = '/devices/virtual/block/loop3'
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:489
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc_node mm/slab.c:3333 [inline]
 kmem_cache_alloc_node_trace+0x13c/0x770 mm/slab.c:3659
 kmalloc_node include/linux/slab.h:526 [inline]
 kzalloc_node include/linux/slab.h:672 [inline]
 __get_vm_area_node+0xf0/0x340 mm/vmalloc.c:1406
 __vmalloc_node_range+0x9f/0x6a0 mm/vmalloc.c:1759
 __vmalloc_node mm/vmalloc.c:1815 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1829 [inline]
 vzalloc+0x46/0x50 mm/vmalloc.c:1868
kobject: 'loop0' (ffff8880a48bce20): kobject_uevent_env
 xt_counters_alloc+0x34/0x60 net/netfilter/x_tables.c:1216
 __do_replace+0x81/0x5b0 net/ipv4/netfilter/ip_tables.c:1050
kobject: 'loop0' (ffff8880a48bce20): fill_kobj_path: path = '/devices/virtual/block/loop0'
 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline]
 do_ipt_set_ctl+0x296/0x3ee net/ipv4/netfilter/ip_tables.c:1674
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline]
 ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240
 tcp_setsockopt net/ipv4/tcp.c:2820 [inline]
 tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814
 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2963
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x13c/0x210 net/socket.c:1844
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c41a
RSP: 002b:00007ffeb7ca0cc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffeb7ca0cf0 RCX: 000000000045c41a
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000714e80 R08: 00000000000002d8 R09: 0000000000004000
R10: 0000000000714820 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000000 R15: 00000000007147c0
Kernel Offset: disabled
Rebooting in 86400 seconds..