WARNING: at net/ipv4/tcp_input.c:3418

WARNING: at net/ipv4/tcp_input.c:3418

[Markus Trippelsdorf]

I've hit the following warnings today while using bittorrent:

------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Not tainted 3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa623 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa624 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa625 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff811c47e7>] ? swiotlb_tbl_unmap_single+0x47/0x120
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa626 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff811c47e7>] ? swiotlb_tbl_unmap_single+0x47/0x120
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa627 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff811c47e7>] ? swiotlb_tbl_unmap_single+0x47/0x120
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa628 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa629 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62a ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62b ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62c ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62d ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62e ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff813d1071>] ? __kfree_skb+0x11/0xa0
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa62f ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff813d1071>] ? __kfree_skb+0x11/0xa0
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa630 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424f93>] ? tcp_rcv_established+0x3d3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff813d1071>] ? __kfree_skb+0x11/0xa0
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa631 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424d83>] ? tcp_rcv_established+0x1c3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa632 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424d83>] ? tcp_rcv_established+0x1c3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa633 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424d83>] ? tcp_rcv_established+0x1c3/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa634 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa635 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa636 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa637 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa638 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa639 ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:2885 tcp_fastretrans_alert+0xecd/0xee0()
Hardware name: System Product Name
Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142318d>] ? tcp_fastretrans_alert+0xecd/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI> 
---[ end trace 6bd1602ca76fa63a ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 0, comm: swapper/3 Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff8103a220>] ? default_idle+0x20/0x40
 [<ffffffff8103a292>] ? amd_e400_idle+0x52/0x100
 [<ffffffff81031156>] ? cpu_idle+0xb6/0xe0
---[ end trace 6bd1602ca76fa63b ]---
Leak s=4294967295 1
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 0, comm: swapper/3 Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff8142484f>] ? tcp_validate_incoming+0x4f/0x320
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff8103a220>] ? default_idle+0x20/0x40
 [<ffffffff8103a292>] ? amd_e400_idle+0x52/0x100
 [<ffffffff81031156>] ? cpu_idle+0xb6/0xe0
---[ end trace 6bd1602ca76fa63c ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 0, comm: swapper/3 Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff8142484f>] ? tcp_validate_incoming+0x4f/0x320
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff8103a220>] ? default_idle+0x20/0x40
 [<ffffffff8103a292>] ? amd_e400_idle+0x52/0x100
 [<ffffffff81031156>] ? cpu_idle+0xb6/0xe0
---[ end trace 6bd1602ca76fa63d ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 842, comm: syslog-ng Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff81089453>] ? tick_handle_oneshot_broadcast+0xf3/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff810d6a5b>] ? kmem_cache_alloc+0x3b/0xa0
 [<ffffffff81113677>] ? fsnotify_create_event+0x37/0x140
 [<ffffffff811129aa>] ? send_to_group.isra.1+0x16a/0x1a0
 [<ffffffff81112e5a>] ? fsnotify+0x2fa/0x340
 [<ffffffff810d6b74>] ? kmem_cache_free+0x14/0xa0
 [<ffffffff81112f6d>] ? __fsnotify_parent+0xcd/0xe0
 [<ffffffff810f708d>] ? notify_change+0x24d/0x2e0
 [<ffffffff810dc961>] ? chown_common.isra.16+0x61/0xa0
 [<ffffffff810dd6f7>] ? sys_fchown+0x57/0x80
 [<ffffffff81478122>] ? system_call_fastpath+0x16/0x1b
---[ end trace 6bd1602ca76fa63e ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
Hardware name: System Product Name
Pid: 842, comm: syslog-ng Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
 [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff81089453>] ? tick_handle_oneshot_broadcast+0xf3/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff810d6a5b>] ? kmem_cache_alloc+0x3b/0xa0
 [<ffffffff81113677>] ? fsnotify_create_event+0x37/0x140
 [<ffffffff811129aa>] ? send_to_group.isra.1+0x16a/0x1a0
 [<ffffffff81112e5a>] ? fsnotify+0x2fa/0x340
 [<ffffffff810d6b74>] ? kmem_cache_free+0x14/0xa0
 [<ffffffff81112f6d>] ? __fsnotify_parent+0xcd/0xe0
 [<ffffffff810f708d>] ? notify_change+0x24d/0x2e0
 [<ffffffff810dc961>] ? chown_common.isra.16+0x61/0xa0
 [<ffffffff810dd6f7>] ? sys_fchown+0x57/0x80
 [<ffffffff81478122>] ? system_call_fastpath+0x16/0x1b
---[ end trace 6bd1602ca76fa63f ]---
------------[ cut here ]------------
WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
Hardware name: System Product Name
Pid: 0, comm: swapper/3 Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
Call Trace:
 <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
 [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
 [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
 [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
 [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
 [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
 [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
 [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
 [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
 [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
 [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
 [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
 [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
 [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
 [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
 [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
 [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
 [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
 <EOI>  [<ffffffff8103a220>] ? default_idle+0x20/0x40
 [<ffffffff8103a292>] ? amd_e400_idle+0x52/0x100
 [<ffffffff81031156>] ? cpu_idle+0xb6/0xe0
---[ end trace 6bd1602ca76fa640 ]---
Leak s=4294967295 3

-- 
Markus

WARNING: at net/ipv4/tcp_input.c:3418

[Vijay Subramanian]

Resending this mail because of earlier failure...


On 25 February 2012 10:34, Markus Trippelsdorf <markus@trippelsdorf.de> wrote:
>
> I've hit the following warnings today while using bittorrent:
>
> ------------[ cut here ]------------
> WARNING: at net/ipv4/tcp_input.c:3418 tcp_ack+0xf8f/0x11a0()
> Hardware name: System Product Name
> Pid: 14513, comm: cc1plus Not tainted 3.3.0-rc4-00091-gbb4c7e9-dirty #3
> Call Trace:
>  <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
>  [<ffffffff8142430f>] ? tcp_ack+0xf8f/0x11a0
>  [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
>  [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
>  [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
>  [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
>  [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
>  [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
>  [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
>  [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
>  [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
>  [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
>  [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
>  [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
>  [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
>  [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
>  [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
>  [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
>  <EOI>
> ---[ end trace 6bd1602ca76fa623 ]---
> ------------[ cut here ]------------
> WARNING: at net/ipv4/tcp_input.c:3048 tcp_fastretrans_alert+0xe9a/0xee0()
> Hardware name: System Product Name
> Pid: 14513, comm: cc1plus Tainted: G        W    3.3.0-rc4-00091-gbb4c7e9-dirty #3
> Call Trace:
>  <IRQ>  [<ffffffff81055c40>] ? warn_slowpath_common+0x60/0xa0
>  [<ffffffff8142315a>] ? tcp_fastretrans_alert+0xe9a/0xee0
>  [<ffffffff814238ac>] ? tcp_ack+0x52c/0x11a0
>  [<ffffffff81424e4d>] ? tcp_rcv_established+0x28d/0x720
>  [<ffffffff8142c4ed>] ? tcp_v4_do_rcv+0x8d/0x2a0
>  [<ffffffff8142e0d9>] ? tcp_v4_rcv+0x5f9/0x720
>  [<ffffffff8140dcbd>] ? ip_local_deliver_finish+0x5d/0x140
>  [<ffffffff813d9af6>] ? __netif_receive_skb+0x2d6/0x3a0
>  [<ffffffff813dcf9a>] ? netif_receive_skb+0x1a/0x80
>  [<ffffffff813d0d79>] ? __netdev_alloc_skb+0x19/0x40
>  [<ffffffff8131baec>] ? atl1e_clean+0x1ac/0x3c0
>  [<ffffffff813dd9d9>] ? net_rx_action+0x79/0x120
>  [<ffffffff8105b3ed>] ? __do_softirq+0x8d/0x120
>  [<ffffffff810935f9>] ? handle_irq_event_percpu+0x79/0x140
>  [<ffffffff8147928c>] ? call_softirq+0x1c/0x26
>  [<ffffffff810341bd>] ? do_softirq+0x3d/0x80
>  [<ffffffff8105b6e5>] ? irq_exit+0xa5/0xc0
>  [<ffffffff8103408d>] ? do_IRQ+0x4d/0xc0
>  [<ffffffff81477a2b>] ? common_interrupt+0x6b/0x6b
>  <EOI>
> ---[ end trace 6bd1602ca76fa624 ]---
>

 Hi Markus,
This looks similar to the errors that were reported in the following threads
http://lists.openwall.net/netdev/2012/02/06/13
http://lists.openwall.net/netdev/2012/02/06/23

Maybe you are hitting the same bug. It was hoped in the discussion
that the following commit would fix it but looks like it does not
(assuming it is the same bug). From your kernel version  (3.3.0-rc4),
it looks like you should have this commit. So, maybe it did not fix
this bug.


commit 5b35e1e6e9ca651e6b291c96d1106043c9af314a
Author: Neal Cardwell <ncardwell@google.com>
Date:   Sat Jan 28 17:29:46 2012 +0000

   tcp: fix tcp_trim_head() to adjust segment count with skb MSS


CCing Neal and Ilpo.

Regards,
Vijay

WARNING: at net/ipv4/tcp_input.c:3418

[Christian Kujau]

Hi,

I'm getting the same message here on PowerPC (32bit):

------------[ cut here ]------------
WARNING: at /usr/local/src/linux-2.6-git/net/ipv4/tcp_input.c:3418
Modules linked in: tun nfs ecryptfs netconsole therm_adt746x aes_generic 
arc4 b43 i2c_powermac sd_mod firewire_sbp2 mac80211 cfg80211 usb_storage 
scsi_mod
NIP: c04720c4 LR: c04720b8 CTR: c049f2c8
REGS: efff1c20 TRAP: 0700   Tainted: G        W     (3.3.0-rc4)
MSR: 00029032 <EE,ME,IR,DR,RI>  CR: 42048448  XER: 20000000
TASK = ee666780[1964] 'milkyway_0.50_p' THREAD: ee6c6000
GPR00: ffffffff efff1cd0 ee666780 ee70c0a0 0000000b ffffffff c0426e70 00000000 
GPR08: 0000000b 00000001 00000000 00000009 42048448 1013488c 00000000 4f4a260f 
GPR16: 29c2cc42 00000502 00000000 000001cb 000001cb ee70c1b0 0000000b 00000000 
GPR24: 00000001 0000000c ffffffff ecef8580 0000000b 3c176da7 ee70c0a0 c0690000 
NIP [c04720c4] tcp_ack+0x720/0x10a0
LR [c04720b8] tcp_ack+0x714/0x10a0
Call Trace:
[efff1cd0] [c04720b8] tcp_ack+0x714/0x10a0 (unreliable)
[efff1d60] [c04756f0] tcp_rcv_established+0x214/0x6c4
[efff1d90] [c047d1dc] tcp_v4_do_rcv+0xd8/0x2a4
[efff1dd0] [c047db0c] tcp_v4_rcv+0x764/0x8e4
[efff1e10] [c045ac6c] ip_local_deliver+0xe0/0x1dc
[efff1e30] [c045a870] ip_rcv+0x378/0x694
[efff1e50] [c04302c8] __netif_receive_skb+0x320/0x52c
[efff1eb0] [c0430790] napi_skb_finish+0x6c/0x90
[efff1ec0] [c03b2e20] gem_poll+0x694/0x1274
[efff1f50] [c0430ccc] net_rx_action+0x1d4/0x278
[efff1fa0] [c003bac0] __do_softirq+0xf4/0x1bc
[efff1ff0] [c00103b0] call_do_softirq+0x14/0x24
[ee6c7ee0] [c00070ac] do_softirq+0xfc/0x128
[ee6c7f00] [c003b73c] irq_exit+0xac/0xcc
[ee6c7f10] [c00071d8] do_IRQ+0x8c/0x1b0
[ee6c7f40] [c0012e60] ret_from_except+0x0/0x14
Instruction dump:
2f800000 419e0020 73250008 4182046c 38a0ffff 7ec4b378 7fc3f378 7c0903a6 
4e800421 801e04e8 7c1a0378 54090ffe <0f090000> 809e04e4 54890ffe 0f090000 
---[ end trace de136ca1488e7a83 ]---
Leak s=4294967295 1


Yesterday the machine panick'ed and shutdown shortly after the message 
appeared. From today's logs I can see the message appeared some 10 hours 
ago but the machine is still up & running. I've been running 3.3.0-rc4 for 
some time now, but network activity went up a few days ago, so that 
might've triggered it.

Ful dmesg & .config: http://nerdbynature.de/bits/3.3.0-rc4/ipv4/

Note: the machine's internal battery seems to be bad, that's why the 
timestamps during bootup are b0rked in those logfiles.

Please Cc me on replies as I'm not subscribed to netdev.

Thanks,
Christian.
-- 
BOFH excuse #444:

overflow error in /dev/null

Re: WARNING: at net/ipv4/tcp_input.c:3418

[Christian Kujau]

[ Cc'ing Neal, as he was the last one touching net/ipv4/tcp_input.c :-) ]

On Sun, 26 Feb 2012 at 16:05, Christian Kujau wrote:
> Hi,
> 
> I'm getting the same message here on PowerPC (32bit):
> 
> ------------[ cut here ]------------
> WARNING: at /usr/local/src/linux-2.6-git/net/ipv4/tcp_input.c:3418
> Modules linked in: tun nfs ecryptfs netconsole therm_adt746x aes_generic 
> arc4 b43 i2c_powermac sd_mod firewire_sbp2 mac80211 cfg80211 usb_storage 
> scsi_mod
> NIP: c04720c4 LR: c04720b8 CTR: c049f2c8
> REGS: efff1c20 TRAP: 0700   Tainted: G        W     (3.3.0-rc4)
> MSR: 00029032 <EE,ME,IR,DR,RI>  CR: 42048448  XER: 20000000
> TASK = ee666780[1964] 'milkyway_0.50_p' THREAD: ee6c6000
> GPR00: ffffffff efff1cd0 ee666780 ee70c0a0 0000000b ffffffff c0426e70 00000000 
> GPR08: 0000000b 00000001 00000000 00000009 42048448 1013488c 00000000 4f4a260f 
> GPR16: 29c2cc42 00000502 00000000 000001cb 000001cb ee70c1b0 0000000b 00000000 
> GPR24: 00000001 0000000c ffffffff ecef8580 0000000b 3c176da7 ee70c0a0 c0690000 
> NIP [c04720c4] tcp_ack+0x720/0x10a0
> LR [c04720b8] tcp_ack+0x714/0x10a0
> Call Trace:
> [efff1cd0] [c04720b8] tcp_ack+0x714/0x10a0 (unreliable)
> [efff1d60] [c04756f0] tcp_rcv_established+0x214/0x6c4
> [efff1d90] [c047d1dc] tcp_v4_do_rcv+0xd8/0x2a4
> [efff1dd0] [c047db0c] tcp_v4_rcv+0x764/0x8e4
> [efff1e10] [c045ac6c] ip_local_deliver+0xe0/0x1dc
> [efff1e30] [c045a870] ip_rcv+0x378/0x694
> [efff1e50] [c04302c8] __netif_receive_skb+0x320/0x52c
> [efff1eb0] [c0430790] napi_skb_finish+0x6c/0x90
> [efff1ec0] [c03b2e20] gem_poll+0x694/0x1274
> [efff1f50] [c0430ccc] net_rx_action+0x1d4/0x278
> [efff1fa0] [c003bac0] __do_softirq+0xf4/0x1bc
> [efff1ff0] [c00103b0] call_do_softirq+0x14/0x24
> [ee6c7ee0] [c00070ac] do_softirq+0xfc/0x128
> [ee6c7f00] [c003b73c] irq_exit+0xac/0xcc
> [ee6c7f10] [c00071d8] do_IRQ+0x8c/0x1b0
> [ee6c7f40] [c0012e60] ret_from_except+0x0/0x14
> Instruction dump:
> 2f800000 419e0020 73250008 4182046c 38a0ffff 7ec4b378 7fc3f378 7c0903a6 
> 4e800421 801e04e8 7c1a0378 54090ffe <0f090000> 809e04e4 54890ffe 0f090000 
> ---[ end trace de136ca1488e7a83 ]---
> Leak s=4294967295 1
> 
> 
> Yesterday the machine panick'ed and shutdown shortly after the message 
> appeared. From today's logs I can see the message appeared some 10 hours 
> ago but the machine is still up & running. I've been running 3.3.0-rc4 for 
> some time now, but network activity went up a few days ago, so that 
> might've triggered it.
> 
> Ful dmesg & .config: http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
> 
> Note: the machine's internal battery seems to be bad, that's why the 
> timestamps during bootup are b0rked in those logfiles.
> 
> Please Cc me on replies as I'm not subscribed to netdev.
> 
> Thanks,
> Christian.
> -- 
> BOFH excuse #444:
> 
> overflow error in /dev/null
> 

-- 
BOFH excuse #29:

It works the way the Wang did, what's the problem

Re: WARNING: at net/ipv4/tcp_input.c:3418

[Neal Cardwell]

Thanks for the detailed reports.

I am working on this, and have a theory and potential fix for a bug
that relates to MSS changes and broken packet counts for SACKed skbs,
which could conceivably lead to the warnings you're seeing. However,
the bug that I am looking at is quite old. (Though it's possible it's
being tickled more now, due to some interaction with recent changes.)

To help provide more data, would you be able to run with 3.3.0-rc3 for
a while (hopefully with roughly the same flavor of workload) and see
if you run into the same problems?

neal

On Wed, Feb 29, 2012 at 12:41 PM, Christian Kujau <lists@nerdbynature.de> wrote:
> This is still happening with 3.3.0-rc5, .config & dmesg here:
>
>   http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
>
> After the WARNING is printed often enough, the machine halts and has to be
> powercycled. It appears that "lots of traffic" or "many connections" may
> cause this, but unfortunately I haven't been able to reproduce this reliably.
>
> Any ideas on that one?
>
> Thanks,
> Christian.
>
> On Sun, 26 Feb 2012 at 16:05, Christian Kujau wrote:
>> Hi,
>>
>> I'm getting the same message here on PowerPC (32bit):
>>
>> ------------[ cut here ]------------
>> WARNING: at /usr/local/src/linux-2.6-git/net/ipv4/tcp_input.c:3418
>> Modules linked in: tun nfs ecryptfs netconsole therm_adt746x aes_generic
>> arc4 b43 i2c_powermac sd_mod firewire_sbp2 mac80211 cfg80211 usb_storage
>> scsi_mod
>> NIP: c04720c4 LR: c04720b8 CTR: c049f2c8
>> REGS: efff1c20 TRAP: 0700   Tainted: G        W     (3.3.0-rc4)
>> MSR: 00029032 <EE,ME,IR,DR,RI>  CR: 42048448  XER: 20000000
>> TASK = ee666780[1964] 'milkyway_0.50_p' THREAD: ee6c6000
>> GPR00: ffffffff efff1cd0 ee666780 ee70c0a0 0000000b ffffffff c0426e70 00000000
>> GPR08: 0000000b 00000001 00000000 00000009 42048448 1013488c 00000000 4f4a260f
>> GPR16: 29c2cc42 00000502 00000000 000001cb 000001cb ee70c1b0 0000000b 00000000
>> GPR24: 00000001 0000000c ffffffff ecef8580 0000000b 3c176da7 ee70c0a0 c0690000
>> NIP [c04720c4] tcp_ack+0x720/0x10a0
>> LR [c04720b8] tcp_ack+0x714/0x10a0
>> Call Trace:
>> [efff1cd0] [c04720b8] tcp_ack+0x714/0x10a0 (unreliable)
>> [efff1d60] [c04756f0] tcp_rcv_established+0x214/0x6c4
>> [efff1d90] [c047d1dc] tcp_v4_do_rcv+0xd8/0x2a4
>> [efff1dd0] [c047db0c] tcp_v4_rcv+0x764/0x8e4
>> [efff1e10] [c045ac6c] ip_local_deliver+0xe0/0x1dc
>> [efff1e30] [c045a870] ip_rcv+0x378/0x694
>> [efff1e50] [c04302c8] __netif_receive_skb+0x320/0x52c
>> [efff1eb0] [c0430790] napi_skb_finish+0x6c/0x90
>> [efff1ec0] [c03b2e20] gem_poll+0x694/0x1274
>> [efff1f50] [c0430ccc] net_rx_action+0x1d4/0x278
>> [efff1fa0] [c003bac0] __do_softirq+0xf4/0x1bc
>> [efff1ff0] [c00103b0] call_do_softirq+0x14/0x24
>> [ee6c7ee0] [c00070ac] do_softirq+0xfc/0x128
>> [ee6c7f00] [c003b73c] irq_exit+0xac/0xcc
>> [ee6c7f10] [c00071d8] do_IRQ+0x8c/0x1b0
>> [ee6c7f40] [c0012e60] ret_from_except+0x0/0x14
>> Instruction dump:
>> 2f800000 419e0020 73250008 4182046c 38a0ffff 7ec4b378 7fc3f378 7c0903a6
>> 4e800421 801e04e8 7c1a0378 54090ffe <0f090000> 809e04e4 54890ffe 0f090000
>> ---[ end trace de136ca1488e7a83 ]---
>> Leak s=4294967295 1
>>
>>
>> Yesterday the machine panick'ed and shutdown shortly after the message
>> appeared. From today's logs I can see the message appeared some 10 hours
>> ago but the machine is still up & running. I've been running 3.3.0-rc4 for
>> some time now, but network activity went up a few days ago, so that
>> might've triggered it.
>>
>> Ful dmesg & .config: http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
>>
>> Note: the machine's internal battery seems to be bad, that's why the
>> timestamps during bootup are b0rked in those logfiles.
>>
>> Please Cc me on replies as I'm not subscribed to netdev.
>>
>> Thanks,
>> Christian.
>> --
>> BOFH excuse #444:
>>
>> overflow error in /dev/null
>>
>
> --
> BOFH excuse #38:
>
> secretary plugged hairdryer into UPS

Re: WARNING: at net/ipv4/tcp_input.c:3418

[Neal Cardwell]

I just sent out to the netdev list a patch that might help:
 "[PATCH] tcp: fix tcp_retransmit_skb() to maintain MSS invariant"

There may be several corners of the code that have
MSS/pcount/sacked_out issues (and I am still looking around), but I
think this should fix one of them.

neal

On Thu, Mar 1, 2012 at 12:31 PM, Neal Cardwell <ncardwell@google.com> wrote:
> Thanks for the detailed reports.
>
> I am working on this, and have a theory and potential fix for a bug
> that relates to MSS changes and broken packet counts for SACKed skbs,
> which could conceivably lead to the warnings you're seeing. However,
> the bug that I am looking at is quite old. (Though it's possible it's
> being tickled more now, due to some interaction with recent changes.)
>
> To help provide more data, would you be able to run with 3.3.0-rc3 for
> a while (hopefully with roughly the same flavor of workload) and see
> if you run into the same problems?
>
> neal
>
> On Wed, Feb 29, 2012 at 12:41 PM, Christian Kujau <lists@nerdbynature.de> wrote:
>> This is still happening with 3.3.0-rc5, .config & dmesg here:
>>
>>   http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
>>
>> After the WARNING is printed often enough, the machine halts and has to be
>> powercycled. It appears that "lots of traffic" or "many connections" may
>> cause this, but unfortunately I haven't been able to reproduce this reliably.
>>
>> Any ideas on that one?
>>
>> Thanks,
>> Christian.
>>
>> On Sun, 26 Feb 2012 at 16:05, Christian Kujau wrote:
>>> Hi,
>>>
>>> I'm getting the same message here on PowerPC (32bit):
>>>
>>> ------------[ cut here ]------------
>>> WARNING: at /usr/local/src/linux-2.6-git/net/ipv4/tcp_input.c:3418
>>> Modules linked in: tun nfs ecryptfs netconsole therm_adt746x aes_generic
>>> arc4 b43 i2c_powermac sd_mod firewire_sbp2 mac80211 cfg80211 usb_storage
>>> scsi_mod
>>> NIP: c04720c4 LR: c04720b8 CTR: c049f2c8
>>> REGS: efff1c20 TRAP: 0700   Tainted: G        W     (3.3.0-rc4)
>>> MSR: 00029032 <EE,ME,IR,DR,RI>  CR: 42048448  XER: 20000000
>>> TASK = ee666780[1964] 'milkyway_0.50_p' THREAD: ee6c6000
>>> GPR00: ffffffff efff1cd0 ee666780 ee70c0a0 0000000b ffffffff c0426e70 00000000
>>> GPR08: 0000000b 00000001 00000000 00000009 42048448 1013488c 00000000 4f4a260f
>>> GPR16: 29c2cc42 00000502 00000000 000001cb 000001cb ee70c1b0 0000000b 00000000
>>> GPR24: 00000001 0000000c ffffffff ecef8580 0000000b 3c176da7 ee70c0a0 c0690000
>>> NIP [c04720c4] tcp_ack+0x720/0x10a0
>>> LR [c04720b8] tcp_ack+0x714/0x10a0
>>> Call Trace:
>>> [efff1cd0] [c04720b8] tcp_ack+0x714/0x10a0 (unreliable)
>>> [efff1d60] [c04756f0] tcp_rcv_established+0x214/0x6c4
>>> [efff1d90] [c047d1dc] tcp_v4_do_rcv+0xd8/0x2a4
>>> [efff1dd0] [c047db0c] tcp_v4_rcv+0x764/0x8e4
>>> [efff1e10] [c045ac6c] ip_local_deliver+0xe0/0x1dc
>>> [efff1e30] [c045a870] ip_rcv+0x378/0x694
>>> [efff1e50] [c04302c8] __netif_receive_skb+0x320/0x52c
>>> [efff1eb0] [c0430790] napi_skb_finish+0x6c/0x90
>>> [efff1ec0] [c03b2e20] gem_poll+0x694/0x1274
>>> [efff1f50] [c0430ccc] net_rx_action+0x1d4/0x278
>>> [efff1fa0] [c003bac0] __do_softirq+0xf4/0x1bc
>>> [efff1ff0] [c00103b0] call_do_softirq+0x14/0x24
>>> [ee6c7ee0] [c00070ac] do_softirq+0xfc/0x128
>>> [ee6c7f00] [c003b73c] irq_exit+0xac/0xcc
>>> [ee6c7f10] [c00071d8] do_IRQ+0x8c/0x1b0
>>> [ee6c7f40] [c0012e60] ret_from_except+0x0/0x14
>>> Instruction dump:
>>> 2f800000 419e0020 73250008 4182046c 38a0ffff 7ec4b378 7fc3f378 7c0903a6
>>> 4e800421 801e04e8 7c1a0378 54090ffe <0f090000> 809e04e4 54890ffe 0f090000
>>> ---[ end trace de136ca1488e7a83 ]---
>>> Leak s=4294967295 1
>>>
>>>
>>> Yesterday the machine panick'ed and shutdown shortly after the message
>>> appeared. From today's logs I can see the message appeared some 10 hours
>>> ago but the machine is still up & running. I've been running 3.3.0-rc4 for
>>> some time now, but network activity went up a few days ago, so that
>>> might've triggered it.
>>>
>>> Ful dmesg & .config: http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
>>>
>>> Note: the machine's internal battery seems to be bad, that's why the
>>> timestamps during bootup are b0rked in those logfiles.
>>>
>>> Please Cc me on replies as I'm not subscribed to netdev.
>>>
>>> Thanks,
>>> Christian.
>>> --
>>> BOFH excuse #444:
>>>
>>> overflow error in /dev/null
>>>
>>
>> --
>> BOFH excuse #38:
>>
>> secretary plugged hairdryer into UPS

Re: WARNING: at net/ipv4/tcp_input.c:3418

[Neal Cardwell]

On Wed, Feb 29, 2012 at 12:41 PM, Christian Kujau <lists@nerdbynature.de> wrote:
> This is still happening with 3.3.0-rc5, .config & dmesg here:
>
>   http://nerdbynature.de/bits/3.3.0-rc4/ipv4/

I was finally able to reproduce this issue where there are warnings
about sacked_out going negative (since 3.3.0-rc4), and my testing
shows that this patch seems to fix the issue:

  http://patchwork.ozlabs.org/patch/144844/

For folks who were seeing this problem and are so inclined, feel free
to try the latest 3.3-rc6 kernel (or davem's "net" tree in git, if
that's easier) with that patch applied, and let me know how it goes.

thanks,
neal

Re: WARNING: at net/ipv4/tcp_input.c:3418

[Markus Trippelsdorf]

On 2012.03.06 at 00:46 -0500, Neal Cardwell wrote:
> On Wed, Feb 29, 2012 at 12:41 PM, Christian Kujau <lists@nerdbynature.de> wrote:
> > This is still happening with 3.3.0-rc5, .config & dmesg here:
> >
> >   http://nerdbynature.de/bits/3.3.0-rc4/ipv4/
> 
> I was finally able to reproduce this issue where there are warnings
> about sacked_out going negative (since 3.3.0-rc4), and my testing
> shows that this patch seems to fix the issue:
> 
>   http://patchwork.ozlabs.org/patch/144844/
> 
> For folks who were seeing this problem and are so inclined, feel free
> to try the latest 3.3-rc6 kernel (or davem's "net" tree in git, if
> that's easier) with that patch applied, and let me know how it goes.

Thanks for tracking this down, Neal.

In my case it looks like the issue was an "once in a lifetime" event.
So no amount of testing would prove anything.

-- 
Markus