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