Problems when using hostapd on meshnode

Simon Morgenthaler s.morgenthaler at students.unibe.ch
Thu Dec 22 10:54:42 EST 2011


Hi

I guess, I'm having exactly the same issue, but using an Atheros AR2315 SoC 
and the ath5k driver and an older compat-wireless packet (2011-07-24) with a 
2.6.37.6 kernel.

I have the same setup, hostapd running on wlan0 and a mesh network (80211s) on 
mesh0. Both interfaces are the same phy0 and are bridged with a br0 interface.

Sometimes the setup seems to work, but often the whole node crashes (most 
likely the kernel) after a few minutes and reboots.

Any idea?

Thanks!

Simon

On Thursday 22 December 2011 16:39:25 Kai Scharwies wrote:
> Hello.
> 
> I was trying to create a meshnode which is also a hotspot using the
> following steps:
> 1. Create virtual interfaces
> iw dev wlan0 del
> iw phy phy0 interface add mesh0 type mp
> iw phy phy0 interface add ap0 type mp (hostapd will change the type to AP)
> 2. Set ip-adresses, enable routing, etc.
> 3. Start hostapd for interface ap0 (channel 13 HT40-) - Clients can connect
>  fine 4. On interface mesh0 start authsae or issue unencrypted mesh (on
>  same channel of course) join via iw on both meshnode and (mesh)gateway
> (same result)
> Station dump shows states to switch between OPEN_SNT, HOLDING, LISTEN,
> but never ESTAB.
> 
> As soon as hostapd is killed and step 4 is repeated the mesh is working
>  fine. Issuing step 3 after step 4 seems to work but eventually the mesh
> de-establishes or even the kernel crashes:
> 
> [ 5762.749369] ath: Failed to stop TX DMA, queues=0x10f!
> [ 5762.754738] skb_over_panic: text:d0cc78f3 len:43 put:17
> head:cfdcb400 data:cfdcb42e tail:0xcfdcb459 end:0xcfdcb450 dev:<NULL>
> [ 5762.766246] ------------[ cut here ]------------
> [ 5762.769483] kernel BUG at net/core/skbuff.c:127!
> [ 5762.769483] invalid opcode: 0000 [#1]
> [ 5762.769483] last sysfs file: /sys/devices/virtual/net/lo/operstate
> [ 5762.769483] Modules linked in: iptable_filter aes_i586 aes_generic
> ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack
> nf_defrag_ipv4 ip_tables x_tables ipv6 arc4 ath9k mac80211 cfg80211
> ath9k_common ath9k_hw ath rtc_cmos ftdi_sio rtc_core compat usbserial
> rtc_lib evdev led_class ext4 jbd2 crc16 ohci_hcd r6040 ehci_hcd mii
> usbcore [last unloaded: scsi_wait_scan]
> [ 5762.769483]
> [ 5762.769483] Pid: 1092, comm: phy0 Not tainted 2.6.34.10 #1 /
> [ 5762.769483] EIP: 0060:[<c11f7792>] EFLAGS: 00000292 CPU: 0
> [ 5762.769483] EIP is at skb_over_panic+0x32/0x40
> [ 5762.769483] EAX: 00000087 EBX: d0cc78f3 ECX: cfd01d8c EDX: c130d274
> [ 5762.769483] ESI: 0000005e EDI: cff092e0 EBP: 0000003f ESP: cfd01d88
> [ 5762.769483]  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
> [ 5762.769483] Process phy0 (pid: 1092, ti=cfd00000 task=cf30c760
> task.ti=cfd00000)
> [ 5762.769483] Stack:
> [ 5762.769483]  c130d274 d0cc78f3 0000002b 00000011 cfdcb400 cfdcb42e
> cfdcb459 cfdcb450
> [ 5762.769483] <0> c130b44e cfdcb448 c11f94c3 cf11f420 d0cc78f3
> cf740a60 1fdf4140 cf1c5d80
> [ 5762.769483] <0> 00000018 cff9c120 cf498000 00000001 cf11f420
> d0cc528e 0000003f d0cdce08
> [ 5762.769483] Call Trace:
> [ 5762.769483]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5762.769483]  [<c11f94c3>] ? skb_put+0x33/0x40
> [ 5762.769483]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5762.769483]  [<d0cc528e>] ? mesh_plink_broken+0x7e/0xb0 [mac80211]
> [ 5762.769483]  [<d0c9a29f>] ? ieee80211_tx_status+0x9cf/0xc10 [mac80211]
> [ 5762.769483]  [<c10a5a57>] ? kmem_cache_free+0x57/0x80
> [ 5762.769483]  [<d0d42555>] ? ath_tx_complete_buf+0xd5/0x130 [ath9k]
> [ 5762.769483]  [<d0d44281>] ? ath_drain_txq_list+0xe1/0x140 [ath9k]
> [ 5762.769483]  [<d0d44328>] ? ath_draintxq+0x48/0x180 [ath9k]
> [ 5762.769483]  [<d0d45c3e>] ? ath_drain_all_txq+0xfe/0x140 [ath9k]
> [ 5762.769483]  [<d0d3bf46>] ? ath_prepare_reset+0x46/0xb0 [ath9k]
> [ 5762.769483]  [<d0d3d78f>] ? ath_reset_internal+0x5f/0x1a0 [ath9k]
> [ 5762.769483]  [<d0d3db30>] ? ath_reset_work+0x0/0x10 [ath9k]
> [ 5762.769483]  [<d0d3d8ee>] ? ath_reset+0x1e/0x80 [ath9k]
> [ 5762.769483]  [<d0d3db30>] ? ath_reset_work+0x0/0x10 [ath9k]
> [ 5762.769483]  [<c1034f1f>] ? worker_thread+0x10f/0x200
> [ 5762.769483]  [<c1038240>] ? autoremove_wake_function+0x0/0x30
> [ 5762.769483]  [<c1034e10>] ? worker_thread+0x0/0x200
> [ 5762.769483]  [<c1037eb4>] ? kthread+0x64/0x70
> [ 5762.769483]  [<c1037e50>] ? kthread+0x0/0x70
> [ 5762.769483]  [<c1002e36>] ? kernel_thread_helper+0x6/0x10
> [ 5762.769483] Code: c9 74 2f 51 ff b0 a0 00 00 00 ff b0 9c 00 00 00
> ff b0 a8 00 00 00 ff b0 a4 00 00 00 52 ff 70 50 53 68 74 d2 30 c1 e8
> 32 2e 08 00 <0f> 0b 83 c4 24 eb fe b9 4e b4 30 c1 eb ca 55 57 56 53 83
> ec 04
> [ 5762.769483] EIP: [<c11f7792>] skb_over_panic+0x32/0x40 SS:ESP
>  0068:cfd01d88 [ 5763.039324] ---[ end trace b99b70cd3652a432 ]---
> [ 5763.044013] Kernel panic - not syncing: Fatal exception in interrupt
> [ 5763.050450] Pid: 1092, comm: phy0 Tainted: G      D    2.6.34.10 #1
> [ 5763.056788] Call Trace:
> [ 5763.059314]  [<c127a56a>] ? panic+0x37/0x91
> [ 5763.063577]  [<c1005027>] ? oops_end+0x77/0x80
> [ 5763.068099]  [<c1003636>] ? do_invalid_op+0x66/0x80
> [ 5763.073058]  [<c11f7792>] ? skb_over_panic+0x32/0x40
> [ 5763.078104]  [<c1002e29>] ? common_interrupt+0x29/0x30
> [ 5763.083333]  [<c1022807>] ? vprintk+0x107/0x340
> [ 5763.088042]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5763.094591]  [<c127c20e>] ? error_code+0x5e/0x70
> [ 5763.099385]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5763.106017]  [<d0cc007b>] ? sta_ht_capa_read+0x2bb/0x5d0 [mac80211]
> [ 5763.112385]  [<c10035d0>] ? do_invalid_op+0x0/0x80
> [ 5763.117256]  [<c11f7792>] ? skb_over_panic+0x32/0x40
> [ 5763.122399]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5763.128941]  [<c11f94c3>] ? skb_put+0x33/0x40
> [ 5763.133471]  [<d0cc78f3>] ? mesh_path_error_tx+0x123/0x210 [mac80211]
> [ 5763.140107]  [<d0cc528e>] ? mesh_plink_broken+0x7e/0xb0 [mac80211]
> [ 5763.146467]  [<d0c9a29f>] ? ieee80211_tx_status+0x9cf/0xc10 [mac80211]
> [ 5763.153096]  [<c10a5a57>] ? kmem_cache_free+0x57/0x80
> [ 5763.158246]  [<d0d42555>] ? ath_tx_complete_buf+0xd5/0x130 [ath9k]
> [ 5763.164524]  [<d0d44281>] ? ath_drain_txq_list+0xe1/0x140 [ath9k]
> [ 5763.170721]  [<d0d44328>] ? ath_draintxq+0x48/0x180 [ath9k]
> [ 5763.176392]  [<d0d45c3e>] ? ath_drain_all_txq+0xfe/0x140 [ath9k]
> [ 5763.182495]  [<d0d3bf46>] ? ath_prepare_reset+0x46/0xb0 [ath9k]
> [ 5763.188510]  [<d0d3d78f>] ? ath_reset_internal+0x5f/0x1a0 [ath9k]
> [ 5763.194700]  [<d0d3db30>] ? ath_reset_work+0x0/0x10 [ath9k]
> [ 5763.200365]  [<d0d3d8ee>] ? ath_reset+0x1e/0x80 [ath9k]
> [ 5763.205683]  [<d0d3db30>] ? ath_reset_work+0x0/0x10 [ath9k]
> [ 5763.211345]  [<c1034f1f>] ? worker_thread+0x10f/0x200
> [ 5763.216480]  [<c1038240>] ? autoremove_wake_function+0x0/0x30
> [ 5763.222310]  [<c1034e10>] ? worker_thread+0x0/0x200
> [ 5763.227267]  [<c1037eb4>] ? kthread+0x64/0x70
> [ 5763.231704]  [<c1037e50>] ? kthread+0x0/0x70
> [ 5763.236051]  [<c1002e36>] ? kernel_thread_helper+0x6/0x10
> 
> 
> I am using Atheros 92xx cards and a compat-wireless built from the
> o80211s git tree a couple of days ago.
> 
> Usually this setup should be doable, right?
> I would be glad to help resolving the issues causing this.
> 
> Is there another mailinglist which should be set on CC? (Maybe
> ath9k-devel, wireless-dev, hostap)
> 
> Best regards,
> Kai
> _______________________________________________
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> Devel at lists.open80211s.org
> http://open80211s.com/mailman/listinfo/devel
> 


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