stack:
call tree: [] tcp_retransmit_skb+0x176/0x2dd
[] tcp_retransmit_timer
[] tcp_write_timer
[] tcp_write_timer
[] tcp_write
[] run_timer_softirq
[] __do_softirq
smp_apic_timer_interrupt apic_timer_interrupt mwait_idle cpu_idle start_kernel
(o) kernel panic - not syncing: Fatal exception in interrupt