stack trace

do_IRQ: stack overflow: 340
[<c010795b>] do_IRQ+0x49/0x1ae
[<c02d6eb4>] common_interrupt+0x18/0x20
[<c02d5285>] _spin_unlock_irqrestore+0x2b/0x2d
[<c0129e95>] __mod_timer+0x101/0x10b
[<f8a36d7c>] ip_ct_refresh_acct+0x8f/0xe7 [ip_conntrack]
[<f8a37e16>] tcp_packet+0x404/0x412 [ip_conntrack]
[<f8a35c3b>] __ip_conntrack_find+0xf/0xa1 [ip_conntrack]
[<f8a364e6>] ip_conntrack_in+0x1dc/0x2a6 [ip_conntrack]
[<c028ad5b>] nf_iterate+0x40/0x81
[<c029b748>] dst_output+0x0/0x1a
[<c028b061>] nf_hook_slow+0x47/0xbc
[<c029b748>] dst_output+0x0/0x1a
[<c029c003>] ip_queue_xmit+0x395/0x3f9
[<c029b748>] dst_output+0x0/0x1a
[<c029ba68>] ip_finish_output2+0x138/0x18d
[<c028b09d>] nf_hook_slow+0x83/0xbc
[<c029b927>] ip_finish_output+0x1c5/0x1ce
[<c029b930>] ip_finish_output2+0x0/0x18d
[<c029b757>] dst_output+0xf/0x1a
[<c028b09d>] nf_hook_slow+0x83/0xbc
[<c029c003>] ip_queue_xmit+0x395/0x3f9
[<c029b748>] dst_output+0x0/0x1a
[<c02aa4a5>] tcp_transmit_skb+0x6bf/0x7d2
[<c028b09d>] nf_hook_slow+0x83/0xbc
[<c02aadb2>] tcp_write_xmit+0x74/0x254
[<c02a0da9>] tcp_sendmsg+0xa7b/0xbe3
[<c02bc6a5>] inet_sendmsg+0x38/0x42
[<c02797c5>] sock_sendmsg+0xdb/0xf7
[<c027c912>] sk_reset_timer+0xc/0x16
[<c027cb1e>] release_sock+0xf/0x4f
[<c02a0e75>] tcp_sendmsg+0xb47/0xbe3
[<c02797c5>] sock_sendmsg+0xdb/0xf7
[<c012052d>] autoremove_wake_function+0x0/0x2d
[<c027c912>] sk_reset_timer+0xc/0x16
[<c0279807>] kernel_sendmsg+0x26/0x2c
[<f8a87443>] xdr_sendpages+0xbf/0x204 [sunrpc]
[<f8a7fa43>] xprt_transmit+0x13a/0x424 [sunrpc]