bridge0: port 3(gretap0) entered disabled state device gretap0 entered promiscuous mode bridge0: port 3(gretap0) entered blocking state bridge0: port 3(gretap0) entered forwarding state ------------[ cut here ]------------ kernel BUG at ./include/linux/skbuff.h:1406! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.139 #35 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffffffff87676240 task.stack: ffffffff87600000 RIP: 0010:skb_queue_prev include/linux/skbuff.h:1406 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1653 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1650 [inline] RIP: 0010:tcp_rtx_queue_tail include/net/tcp.h:1708 [inline] RIP: 0010:tcp_fragment+0x12a7/0x13e0 net/ipv4/tcp_output.c:1284 RSP: 0018:ffff8880aee07c00 EFLAGS: 00010206 RAX: ffffffff87676240 RBX: ffff8880538dea80 RCX: 1ffff1100b4b2999 RDX: 0000000000000100 RSI: ffff8880538dea80 RDI: ffff8880538dea88 RBP: ffff8880aee07c58 R08: 0000000001080020 R09: ffff8880538deaa8 R10: ffff88821fff8010 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000005900 R14: ffff88805a594cd0 R15: 0000000001080020 FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000020797b8 CR3: 0000000086839000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_write_wakeup+0x34c/0x5b0 net/ipv4/tcp_output.c:3708 tcp_send_probe0+0x4b/0x3fe net/ipv4/tcp_output.c:3736 tcp_probe_timer net/ipv4/tcp_timer.c:365 [inline] tcp_write_timer_handler+0x6da/0x7e0 net/ipv4/tcp_timer.c:583 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 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:1064 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffffffff87607de8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0ee2a5c RBX: ffffffff87676240 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff87676abc RBP: ffffffff87607e10 R08: 1ffffffff104a501 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff877152d0 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87676240 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:557 default_idle_call+0x36/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x262/0x3d0 kernel/sched/idle.c:246 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:351 rest_init+0x1d9/0x1e2 init/main.c:435 start_kernel+0x6df/0x6fd init/main.c:709 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:381 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:362 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 Code: 3c 02 00 0f 85 4f 01 00 00 48 8b 45 d0 ba 00 00 00 00 4c 8b b0 58 02 00 00 4c 3b 75 c0 4c 0f 44 f2 e9 e6 fc ff ff e8 49 72 35 fc <0f> 0b e8 a2 1f 5f fc e9 31 fa ff ff 48 89 df e8 f5 1e 5f fc e9 RIP: skb_queue_prev include/linux/skbuff.h:1406 [inline] RSP: ffff8880aee07c00 RIP: tcp_write_queue_prev include/net/tcp.h:1653 [inline] RSP: ffff8880aee07c00 RIP: tcp_write_queue_prev include/net/tcp.h:1650 [inline] RSP: ffff8880aee07c00 RIP: tcp_rtx_queue_tail include/net/tcp.h:1708 [inline] RSP: ffff8880aee07c00 RIP: tcp_fragment+0x12a7/0x13e0 net/ipv4/tcp_output.c:1284 RSP: ffff8880aee07c00 ---[ end trace 431fbc843082f165 ]---