Re: [PATCH net] tcp: fix NULL ref in tail loss probe

From: Yuchung Cheng Date: Wed, 5 Dec 2018 14:38:38 -0800 > TCP loss probe timer may fire when the retranmission queue is empty but > has a non-zero tp->packets_out counter. tcp_send_loss_probe will call > tcp_rearm_rto which triggers NULL pointer reference by fetching the > retranmission queue h

[PATCH net] tcp: fix NULL ref in tail loss probe

TCP loss probe timer may fire when the retranmission queue is empty but has a non-zero tp->packets_out counter. tcp_send_loss_probe will call tcp_rearm_rto which triggers NULL pointer reference by fetching the retranmission queue head in its sub-routines. Add a more detailed warning to help catch