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本帖最后由 FlankerSky 于 2013-10-31 19:00 编辑
新手,没有深入的分析过死锁,以前碰到过类似嵌套的那种死锁,能看出来,这次这个真是死活都看不出来,下面是我的分析,各位大侠指点下:
1.基本情况描述:
红色的那部分是一个内核线程(kks_tx),它的作用是处理上层下来的数据包(上层下来的包是在netfilter的local_out处被我加到队列里去的),上层应用发下来的数据包,出于业务需要,有可能会被我写的内核模块直接响应,所以下面会调用netif_receive_skb给上层应用发送数据包。在tcp的入口tcp_v4_rcv这里是有一个自旋锁的,kks_tx在获得自旋锁后,继续执行,但是接下来我就看不懂了(红色上面的那部分),是被e1000e的中断给中断掉了吗?然后接着往下执行到tcp_v4_rcv,就会造成死锁???
2.但是我的代码是跑在vmware里的,不管我把vmware设置成单核还是多核都会出现这种情况,根据LDD3中说的,在非smp上,自旋锁不是没有任何作用吗?
而且在LDD3中也说,自旋锁期间是禁止本地CPU中断的啊,那这样就说不通了啊。
我是越分析越糊涂,大侠们帮我看看我的思路对不对啊?是不是方向错了?谢谢了!
[ 3182.546342] BUG: soft lockup - CPU#0 stuck for 22s! [KksTx:2742]
[ 3182.547942] Modules linked in: kksfilter(O) e1000e(O) vmhgfs(O) vsock(O) acpiphp vmwgfx ttm drm snd_ens1371 gameport snd_ac97_codec ac97_bus snd_pcm vmw_balloon snd_seq_midi snd_rawmidi snd_seq_midi_event psmouse snd_seq serio_raw snd_timer snd_seq_device snd joydev soundcore snd_page_alloc bnep rfcomm bluetooth parport_pc ppdev vmci(O) shpchp mac_hid i2c_piix4 lp parport usbhid hid floppy mptspi mptscsih mptbase vmxnet(O) vmw_pvscsi vmxnet3 [last unloaded: e1000e]
[ 3182.560267] irq event stamp: 0
[ 3182.561060] hardirqs last enabled at (0): [< (null)>] (null)
[ 3182.562649] hardirqs last disabled at (0): [<c1058564>] copy_process+0x484/0x1170
[ 3182.564637] softirqs last enabled at (0): [<c1058564>] copy_process+0x484/0x1170
[ 3182.566563] softirqs last disabled at (0): [< (null)>] (null)
[ 3182.568115] Modules linked in: kksfilter(O) e1000e(O) vmhgfs(O) vsock(O) acpiphp vmwgfx ttm drm snd_ens1371 gameport snd_ac97_codec ac97_bus snd_pcm vmw_balloon snd_seq_midi snd_rawmidi snd_seq_midi_event psmouse snd_seq serio_raw snd_timer snd_seq_device snd joydev soundcore snd_page_alloc bnep rfcomm bluetooth parport_pc ppdev vmci(O) shpchp mac_hid i2c_piix4 lp parport usbhid hid floppy mptspi mptscsih mptbase vmxnet(O) vmw_pvscsi vmxnet3 [last unloaded: e1000e]
[ 3182.580028]
[ 3182.580431] Pid: 2742, comm: KksTx Tainted: G O 3.2.6 #18 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
[ 3182.583631] EIP: 0060:[<c12ba6df>] EFLAGS: 00000282 CPU: 0
[ 3182.585043] EIP is at delay_tsc+0x1f/0x70
[ 3182.586068] EAX: 7170b643 EBX: f0a98d34 ECX: f0a98d34 EDX: 000007db
[ 3182.587670] ESI: 00000000 EDI: 00000001 EBP: f680dbb4 ESP: f680dba4
[ 3182.589252] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 3182.590632] Process KksTx (pid: 2742, ti=f680c000 task=e604ea80 task.ti=f4de6000)
[ 3182.592516] Stack:
[ 3182.593046] 7170b5d7 f0a98d34 280c08d0 00000000 f680dbbc c12ba62e f680dbdc c12c150b
[ 3182.595284] 00000001 a087b7e8 00000001 f0a98d34 c1e896c0 f0a98d00 f680dbf8 c159eefd
[ 3182.597516] 00000000 00000002 00000000 c14f6f2a f4c91600 f680dc4c c14f6f2a 00000050
[ 3182.599751] Call Trace:
[ 3182.600390] [<c12ba62e>] __delay+0xe/0x10
[ 3182.601454] [<c12c150b>] do_raw_spin_lock+0xab/0xf0
[ 3182.602706] [<c159eefd>] _raw_spin_lock_nested+0x3d/0x50
[ 3182.604087] [<c14f6f2a>] ? tcp_v4_rcv+0x76a/0xaa0
[ 3182.605285] [<c14f6f2a>] tcp_v4_rcv+0x76a/0xaa0
[ 3182.606451] [<c14d4b8f>] ip_local_deliver_finish+0xdf/0x380
[ 3182.607866] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.609318] [<c14d4fbf>] ip_local_deliver+0x7f/0x90
[ 3182.610578] [<c14d46be>] ip_rcv_finish+0x16e/0x560
[ 3182.611804] [<c14d522a>] ip_rcv+0x25a/0x320
[ 3182.612880] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.614193] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.615547] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.616918] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.618187] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.619517] [<f848e33e>] SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.621019] [<f848f7ac>] KksNatHandler+0x612/0x86d [kksfilter]
[ 3182.622516] [<c12ba291>] ? sscanf+0x11/0x14
[ 3182.623592] [<f84903a4>] ? kks_inet_addr+0x37/0x4f [kksfilter]
[ 3182.625069] [<f848fad6>] kks_rx+0x4e/0xb9 [kksfilter]
[ 3182.626362] [<f848fc52>] hook_local_in+0x111/0x1d7 [kksfilter]
[ 3182.627838] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.629145] [<c14cd663>] nf_iterate+0x63/0x90
[ 3182.630274] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.631582] [<c14cd722>] nf_hook_slow+0x92/0x150
[ 3182.632761] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.634069] [<c14d521a>] ip_rcv+0x24a/0x320
[ 3182.635155] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.636465] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.638624] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.639996] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.641250] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.642564] [<c14a71a7>] napi_skb_finish+0x37/0x50
[ 3182.643781] [<c14a7701>] napi_gro_receive+0xa1/0xb0
[ 3182.645060] [<f9d41726>] e1000_receive_skb+0xc6/0x170 [e1000e]
[ 3182.646577] [<c149a19d>] ? __kfree_skb+0x3d/0x90
[ 3182.647779] [<f9d43166>] e1000_clean_rx_irq+0x206/0x340 [e1000e]
[ 3182.649419] [<f9d49b74>] e1000e_poll+0x64/0x2d0 [e1000e]
[ 3182.650768] [<c14a790d>] net_rx_action+0x12d/0x240
[ 3182.651988] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.653245] [<c1060ec9>] __do_softirq+0x99/0x1d0
[ 3182.654429] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.655688] <IRQ>
[ 3182.656264] [<c106123e>] ? irq_exit+0x7e/0xa0
[ 3182.657406] [<c15a6f2b>] ? do_IRQ+0x4b/0xc0
[ 3182.658496] [<c15a6d75>] ? common_interrupt+0x35/0x3c
[ 3182.659796] [<c14f00d8>] ? tcp_connect+0x318/0x490
[ 3182.661011] [<c14e6841>] ? tcp_validate_incoming+0x71/0x340
[ 3182.662421] [<c14f8010>] ? tcp_check_req+0x260/0x4b0
[ 3182.663676] [<c14ecaf7>] ? tcp_rcv_state_process+0x47/0xb80
[ 3182.665078] [<c14f8093>] ? tcp_check_req+0x2e3/0x4b0
[ 3182.666338] [<c14f7ced>] ? tcp_child_process+0x8d/0x150
[ 3182.667660] [<c14f5d8a>] ? tcp_v4_do_rcv+0x2aa/0x3c0
[ 3182.668922] [<c12c149b>] ? do_raw_spin_lock+0x3b/0xf0
[ 3182.670202] [<c159eefd>] ? _raw_spin_lock_nested+0x3d/0x50
[ 3182.671603] [<c14f6f4a>] ? tcp_v4_rcv+0x78a/0xaa0
[ 3182.672800] [<c14d4b8f>] ? ip_local_deliver_finish+0xdf/0x380
[ 3182.674263] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.675713] [<c14d4fbf>] ? ip_local_deliver+0x7f/0x90
[ 3182.676991] [<c14d46be>] ? ip_rcv_finish+0x16e/0x560
[ 3182.678259] [<c14d522a>] ? ip_rcv+0x25a/0x320
[ 3182.679371] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.680670] [<c14a63d2>] ? __netif_receive_skb+0x4c2/0x570
[ 3182.682057] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.683436] [<c14a707b>] ? netif_receive_skb+0xcb/0xe0
[ 3182.684730] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.686027] [<f848e33e>] ? SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.687568] [<f848f867>] ? KksNatHandler+0x6cd/0x86d [kksfilter]
[ 3182.689094] [<c1095000>] ? futex_wait_requeue_pi+0x1c0/0x380
[ 3182.690526] [<f848fa67>] ? kks_tx+0x60/0x81 [kksfilter]
[ 3182.691859] [<f848fa07>] ? KksNatHandler+0x86d/0x86d [kksfilter]
[ 3182.693386] [<c1079df8>] ? kthread+0x78/0x80
[ 3182.694488] [<c1079d80>] ? __init_kthread_worker+0x60/0x60
[ 3182.695876] [<c15a6d82>] ? kernel_thread_helper+0x6/0x10
[ 3182.697220] Code: c3 8d 74 26 00 8d bc 27 00 00 00 00 55 89 e5 57 56 53 83 ec 04 3e 8d 74 26 00 64 8b 35 ec 5e 91 c1 89 c7 8d 76 00 0f ae e8 0f 31 <8d> 74 26 00 89 45 f0 eb 0d f3 90 64 8b 1d ec 5e 91 c1 39 de 75
[ 3182.704103] Call Trace:
[ 3182.704733] [<c12ba62e>] __delay+0xe/0x10
[ 3182.705761] [<c12c150b>] do_raw_spin_lock+0xab/0xf0
[ 3182.707016] [<c159eefd>] _raw_spin_lock_nested+0x3d/0x50
[ 3182.708359] [<c14f6f2a>] ? tcp_v4_rcv+0x76a/0xaa0
[ 3182.709555] [<c14f6f2a>] tcp_v4_rcv+0x76a/0xaa0
[ 3182.710715] [<c14d4b8f>] ip_local_deliver_finish+0xdf/0x380
[ 3182.712119] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.713565] [<c14d4fbf>] ip_local_deliver+0x7f/0x90
[ 3182.714807] [<c14d46be>] ip_rcv_finish+0x16e/0x560
[ 3182.716023] [<c14d522a>] ip_rcv+0x25a/0x320
[ 3182.717090] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.718410] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.719756] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.721120] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.722391] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.723693] [<f848e33e>] SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.725185] [<f848f7ac>] KksNatHandler+0x612/0x86d [kksfilter]
[ 3182.726665] [<c12ba291>] ? sscanf+0x11/0x14
[ 3182.727788] [<f84903a4>] ? kks_inet_addr+0x37/0x4f [kksfilter]
[ 3182.729257] [<f848fad6>] kks_rx+0x4e/0xb9 [kksfilter]
[ 3182.730574] [<f848fc52>] hook_local_in+0x111/0x1d7 [kksfilter]
[ 3182.732044] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.733344] [<c14cd663>] nf_iterate+0x63/0x90
[ 3182.734457] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.735758] [<c14cd722>] nf_hook_slow+0x92/0x150
[ 3182.736979] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.738293] [<c14d521a>] ip_rcv+0x24a/0x320
[ 3182.739365] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.740660] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.741997] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.743364] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.744622] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.745921] [<c14a71a7>] napi_skb_finish+0x37/0x50
[ 3182.747146] [<c14a7701>] napi_gro_receive+0xa1/0xb0
[ 3182.748385] [<f9d41726>] e1000_receive_skb+0xc6/0x170 [e1000e]
[ 3182.749856] [<c149a19d>] ? __kfree_skb+0x3d/0x90
[ 3182.751043] [<f9d43166>] e1000_clean_rx_irq+0x206/0x340 [e1000e]
[ 3182.752559] [<f9d49b74>] e1000e_poll+0x64/0x2d0 [e1000e]
[ 3182.753901] [<c14a790d>] net_rx_action+0x12d/0x240
[ 3182.755126] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.756384] [<c1060ec9>] __do_softirq+0x99/0x1d0
[ 3182.757555] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.758823] <IRQ> [<c106123e>] ? irq_exit+0x7e/0xa0
[ 3182.760124] [<c15a6f2b>] ? do_IRQ+0x4b/0xc0
[ 3182.761192] [<c15a6d75>] ? common_interrupt+0x35/0x3c
[ 3182.762478] [<c14f00d8>] ? tcp_connect+0x318/0x490
[ 3182.763694] [<c14e6841>] ? tcp_validate_incoming+0x71/0x340
[ 3182.765101] [<c14f8010>] ? tcp_check_req+0x260/0x4b0
[ 3182.766370] [<c14ecaf7>] ? tcp_rcv_state_process+0x47/0xb80
[ 3182.767775] [<c14f8093>] ? tcp_check_req+0x2e3/0x4b0
[ 3182.769032] [<c14f7ced>] ? tcp_child_process+0x8d/0x150
[ 3182.770366] [<c14f5d8a>] ? tcp_v4_do_rcv+0x2aa/0x3c0
[ 3182.771626] [<c12c149b>] ? do_raw_spin_lock+0x3b/0xf0
[ 3182.772905] [<c159eefd>] ? _raw_spin_lock_nested+0x3d/0x50
[ 3182.774297] [<c14f6f4a>] ? tcp_v4_rcv+0x78a/0xaa0
[ 3182.775494] [<c14d4b8f>] ? ip_local_deliver_finish+0xdf/0x380
[ 3182.776945] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.778409] [<c14d4fbf>] ? ip_local_deliver+0x7f/0x90
[ 3182.779693] [<c14d46be>] ? ip_rcv_finish+0x16e/0x560
[ 3182.780952] [<c14d522a>] ? ip_rcv+0x25a/0x320
[ 3182.782064] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.783379] [<c14a63d2>] ? __netif_receive_skb+0x4c2/0x570
[ 3182.784762] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.786125] [<c14a707b>] ? netif_receive_skb+0xcb/0xe0
[ 3182.787536] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.788836] [<f848e33e>] ? SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.790382] [<f848f867>] ? KksNatHandler+0x6cd/0x86d [kksfilter]
[ 3182.791890] [<c1095000>] ? futex_wait_requeue_pi+0x1c0/0x380
[ 3182.793313] [<f848fa67>] ? kks_tx+0x60/0x81 [kksfilter]
[ 3182.794645] [<f848fa07>] ? KksNatHandler+0x86d/0x86d [kksfilter]
[ 3182.796155] [<c1079df8>] ? kthread+0x78/0x80
[ 3182.797244] [<c1079d80>] ? __init_kthread_worker+0x60/0x60
[ 3182.798634] [<c15a6d82>] ? kernel_thread_helper+0x6/0x10
[ 3182.799988] Kernel panic - not syncing: softlockup: hung tasks
[ 3182.801440] Pid: 2742, comm: KksTx Tainted: G O 3.2.6 #18
[ 3182.803002] Call Trace:
[ 3182.803629] [<c1594f9f>] ? printk+0x1d/0x1f
[ 3182.804696] [<c1594e75>] panic+0x5c/0x169
[ 3182.805746] [<c10bd4d1>] watchdog_timer_fn+0x151/0x160
[ 3182.807060] [<c107e28d>] __run_hrtimer+0x6d/0x1b0
[ 3182.808255] [<c10bd380>] ? __touch_watchdog+0x20/0x20
[ 3182.809533] [<c107ecd5>] hrtimer_interrupt+0xe5/0x260
[ 3182.810826] [<c107ed51>] ? hrtimer_interrupt+0x161/0x260
[ 3182.812169] [<c15a6ff4>] smp_apic_timer_interrupt+0x54/0x88
[ 3182.813575] [<c12bb8d8>] ? trace_hardirqs_off_thunk+0xc/0x14
[ 3182.815016] [<c159fe02>] apic_timer_interrupt+0x36/0x3c
[ 3182.816336] [<c12ba6df>] ? delay_tsc+0x1f/0x70
[ 3182.817465] [<c12ba62e>] __delay+0xe/0x10
[ 3182.818497] [<c12c150b>] do_raw_spin_lock+0xab/0xf0
[ 3182.819733] [<c159eefd>] _raw_spin_lock_nested+0x3d/0x50
[ 3182.821081] [<c14f6f2a>] ? tcp_v4_rcv+0x76a/0xaa0
[ 3182.822287] [<c14f6f2a>] tcp_v4_rcv+0x76a/0xaa0
[ 3182.823440] [<c14d4b8f>] ip_local_deliver_finish+0xdf/0x380
[ 3182.824856] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.826314] [<c14d4fbf>] ip_local_deliver+0x7f/0x90
[ 3182.827549] [<c14d46be>] ip_rcv_finish+0x16e/0x560
[ 3182.828763] [<c14d522a>] ip_rcv+0x25a/0x320
[ 3182.829831] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.831143] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.832484] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.833848] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.835108] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.836408] [<f848e33e>] SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.837899] [<f848f7ac>] KksNatHandler+0x612/0x86d [kksfilter]
[ 3182.839384] [<c12ba291>] ? sscanf+0x11/0x14
[ 3182.840453] [<f84903a4>] ? kks_inet_addr+0x37/0x4f [kksfilter]
[ 3182.841913] [<f848fad6>] kks_rx+0x4e/0xb9 [kksfilter]
[ 3182.843194] [<f848fc52>] hook_local_in+0x111/0x1d7 [kksfilter]
[ 3182.844659] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.845954] [<c14cd663>] nf_iterate+0x63/0x90
[ 3182.847065] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.848361] [<c14cd722>] nf_hook_slow+0x92/0x150
[ 3182.849531] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.850840] [<c14d521a>] ip_rcv+0x24a/0x320
[ 3182.851909] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.853209] [<c14a63d2>] __netif_receive_skb+0x4c2/0x570
[ 3182.854561] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.855921] [<c14a707b>] netif_receive_skb+0xcb/0xe0
[ 3182.857175] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.858483] [<c14a71a7>] napi_skb_finish+0x37/0x50
[ 3182.859698] [<c14a7701>] napi_gro_receive+0xa1/0xb0
[ 3182.860939] [<f9d41726>] e1000_receive_skb+0xc6/0x170 [e1000e]
[ 3182.862420] [<c149a19d>] ? __kfree_skb+0x3d/0x90
[ 3182.863594] [<f9d43166>] e1000_clean_rx_irq+0x206/0x340 [e1000e]
[ 3182.865114] [<f9d49b74>] e1000e_poll+0x64/0x2d0 [e1000e]
[ 3182.866474] [<c14a790d>] net_rx_action+0x12d/0x240
[ 3182.867692] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.868950] [<c1060ec9>] __do_softirq+0x99/0x1d0
[ 3182.870123] [<c1060e30>] ? local_bh_enable+0xd0/0xd0
[ 3182.871397] <IRQ> [<c106123e>] ? irq_exit+0x7e/0xa0
[ 3182.872700] [<c15a6f2b>] ? do_IRQ+0x4b/0xc0
[ 3182.873767] [<c15a6d75>] ? common_interrupt+0x35/0x3c
[ 3182.875060] [<c14f00d8>] ? tcp_connect+0x318/0x490
[ 3182.876276] [<c14e6841>] ? tcp_validate_incoming+0x71/0x340
[ 3182.877682] [<c14f8010>] ? tcp_check_req+0x260/0x4b0
[ 3182.878945] [<c14ecaf7>] ? tcp_rcv_state_process+0x47/0xb80
[ 3182.880351] [<c14f8093>] ? tcp_check_req+0x2e3/0x4b0
[ 3182.881613] [<c14f7ced>] ? tcp_child_process+0x8d/0x150
[ 3182.882945] [<c14f5d8a>] ? tcp_v4_do_rcv+0x2aa/0x3c0
[ 3182.884199] [<c12c149b>] ? do_raw_spin_lock+0x3b/0xf0
[ 3182.885473] [<c159eefd>] ? _raw_spin_lock_nested+0x3d/0x50
[ 3182.886867] [<c14f6f4a>] ? tcp_v4_rcv+0x78a/0xaa0
[ 3182.888062] [<c14d4b8f>] ? ip_local_deliver_finish+0xdf/0x380
[ 3182.889510] [<c14d4aec>] ? ip_local_deliver_finish+0x3c/0x380
[ 3182.890966] [<c14d4fbf>] ? ip_local_deliver+0x7f/0x90
[ 3182.892245] [<c14d46be>] ? ip_rcv_finish+0x16e/0x560
[ 3182.893504] [<c14d522a>] ? ip_rcv+0x25a/0x320
[ 3182.894626] [<c14d4550>] ? inet_del_protocol+0x30/0x30
[ 3182.895925] [<c14a63d2>] ? __netif_receive_skb+0x4c2/0x570
[ 3182.897308] [<c14a5fec>] ? __netif_receive_skb+0xdc/0x570
[ 3182.898680] [<c14a707b>] ? netif_receive_skb+0xcb/0xe0
[ 3182.899980] [<c14a6fcf>] ? netif_receive_skb+0x1f/0xe0
[ 3182.901281] [<f848e33e>] ? SendSkb2Middle+0x162/0x176 [kksfilter]
[ 3182.902820] [<f848f867>] ? KksNatHandler+0x6cd/0x86d [kksfilter]
[ 3182.904330] [<c1095000>] ? futex_wait_requeue_pi+0x1c0/0x380
[ 3182.905777] [<f848fa67>] ? kks_tx+0x60/0x81 [kksfilter]
[ 3182.907106] [<f848fa07>] ? KksNatHandler+0x86d/0x86d [kksfilter]
[ 3182.908614] [<c1079df8>] ? kthread+0x78/0x80
[ 3182.909703] [<c1079d80>] ? __init_kthread_worker+0x60/0x60
[ 3182.911102] [<c15a6d82>] ? kernel_thread_helper+0x6/0x10
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