creating ap interface

DISCUSSION Arend van Spriel 4 participants 9 messages Jun 17, 2015 – Jun 21, 2015

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Arend van Spriel

author

2015-06-17 18:38 UTC #0 lore raw

Hi Dan,

When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on this: bug or intentional?

Regards,
Arend

[195312.837736] brcmfmac: brcmf_cfg80211_add_iface enter: wl5ap type 3
[195312.844033] brcmfmac: brcmf_ap_add_vif Adding vif "wl5ap"
[195312.849525] brcmfmac: brcmf_alloc_vif allocating virtual interface (size=3136)
[195312.856842] brcmfmac: brcmf_fil_bsscfg_data_set ifidx=0, bssidx=0, name=bsscfg:ssid, len=40
[195312.865276] brcmutil: data
[195312.868070] 00000000: 02 00 00 00 05 00 00 00 73 73 69 64 32 00 00 00  ........ssid2...
[195312.876187] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[195312.884301] 00000020: 00 00 00 00 00 00 00 00 
   ........
[195312.891725] brcmfmac: brcmf_sdio_bus_txctl Enter
[195312.896466] brcmfmac: brcmf_sdio_dpc Enter
[195312.900663] brcmfmac: brcmf_sdio_kso_control Enter: on=1
[195312.910548] brcmfmac: brcmf_sdio_isr Enter
[195312.914877] brcmfmac: brcmf_sdio_tx_ctrlframe Enter
[195312.919943] brcmfmac: brcmf_sdio_dpc Enter
[195312.920022] brcmfmac: brcmf_sdio_bus_rxctl Enter
[195312.928967] brcmfmac: brcmf_sdio_isr Enter
[195312.933282] brcmfmac: brcmf_sdio_dpc Dongle reports CHIPACTIVE
[195312.939220] brcmfmac: brcmf_sdio_readframes Enter
[195312.944099] brcmfmac: brcmf_sdio_read_control Enter
[195312.949234] brcmfmac: brcmf_sdio_bus_rxctl resumed on rxctl frame, got 68 expected 68
[195312.949310] brcmfmac: brcmf_fweh_event_worker event IF (54) ifidx 1 bsscfg 2 addr 00:90:4c:70:43:54
[195312.949312] brcmfmac: brcmf_fweh_event_worker   version 2 flags 0 status 0 reason 0
[195312.949314] brcmutil: event payload, len=5
[195312.949316] 00000000: 01 01 00 02 01 
   .....
[195312.949318] brcmfmac: brcmf_fweh_handle_if_event action: 1 idx: 1 bsscfg: 2 flags: 0 role: 1
[195312.949320] brcmfmac: brcmf_fweh_handle_if_event adding wl0.2 (00:90:4c:70:43:54)
[195312.949322] brcmfmac: brcmf_add_if Enter, idx=2, ifidx=1
[195312.949323] brcmfmac: brcmf_add_if allocate netdev interface
[195312.949333] brcmfmac: brcmf_add_if  ==== pid:135f, if:wl0.2 (00:90:4c:70:43:54) created ===
[195312.949336] brcmfmac: brcmf_fws_macdesc_init enter: desc ffff8800bb798b00 ea=00:90:4c:70:43:54, ifidx=1
[195312.949338] brcmfmac: brcmf_fws_add_interface added MACIF:1
[195312.949341] brcmfmac: brcmf_notify_vif_event Enter: action 1 flags 0 ifidx 1 bsscfg 2
[195312.949403] brcmfmac: brcmf_sdio_dpc Enter
[195312.970325] brcmfmac: brcmf_sdio_kso_control Enter: on=0
[195313.054361] brcmfmac: brcmf_net_attach Enter, idx=2 mac=00:90:4c:70:43:54
[195313.061537] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.067170] brcmfmac: brcmf_net_attach wl5ap: Broadcom Dongle Host Driver
[195313.074637] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.080149] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.085653] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.091877] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.097400] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.102934] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.108825] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.114322] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.119835] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.125593] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.131117] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.136610] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.142185] brcmfmac: brcmf_cfg80211_change_iface Enter, idx=2, type=2
[195313.148804] ------------[ cut here ]------------
[195313.153520] WARNING: CPU: 1 PID: 1398 at drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c:864 brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]()
[195313.166897] Modules linked in: brcmfmac(O) brcmutil(O) sdhci_pci sdhci cfg80211 nfsv3 nfs_acl nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 iptable_mangle xt_tcpudp ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables autofs4 nfs bridge stp llc lockd grace sunrpc fscache dell_wmi sparse_keymap snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic dell_laptop pl2303 usbserial nouveau dcdbas snd_hda_intel snd_hda_controller i8k snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device coretemp crc32c_intel snd_timer mxm_wmi intel_agp microcode serio_raw ttm drm_kms_helper intel_gtt lpc_ich snd drm i2c_algo_bit intel_ips agpgart soundcore mfd_core video mmc_block e1000e ptp firewire_ohci psmouse ahci libahci firewire_core mmc_core crc_itu_t pps_core [last unloaded: cfg80211]
[195313.247913] CPU: 1 PID: 1398 Comm: NetworkManager Tainted: G W  O    4.1.0-rc6-wl-testing-x64-00002-gc37b3da #1
[195313.258686] Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07 02/15/2011
[195313.266107]  ffffffffa0edc918 ffff8800cafef988 ffffffff8161259f 0000000000000001
[195313.273669]  0000000000000000 ffff8800cafef9c8 ffffffff810537ca ffff8800c5483000
[195313.281228]  0000000000000002 ffff8800c5483000 ffff8800b9c36000 ffff8800b9cc0280
[195313.288787] Call Trace:
[195313.291325]  [<ffffffff8161259f>] dump_stack+0x45/0x57
[195313.296581]  [<ffffffff810537ca>] warn_slowpath_common+0x8a/0xc0
[195313.302669]  [<ffffffff810538ba>] warn_slowpath_null+0x1a/0x20
[195313.308617]  [<ffffffffa0ea9a29>] brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]
[195313.316460]  [<ffffffffa0e006e4>] cfg80211_change_iface+0x1a4/0x3f0 [cfg80211]
[195313.323801]  [<ffffffffa0e06dd6>] ? __cfg80211_wdev_from_attrs+0x36/0x1a0 [cfg80211]
[195313.331630]  [<ffffffffa0e07ce7>] nl80211_set_interface+0x157/0x230 [cfg80211]
[195313.338973]  [<ffffffff8154a1e5>] genl_family_rcv_msg+0x1a5/0x3d0
[195313.345148]  [<ffffffff8154a410>] ? genl_family_rcv_msg+0x3d0/0x3d0
[195313.351513]  [<ffffffff8154a4a1>] genl_rcv_msg+0x91/0xd0
[195313.356907]  [<ffffffff81549741>] netlink_rcv_skb+0xc1/0xe0
[195313.362596]  [<ffffffff81549dec>] genl_rcv+0x2c/0x40
[195313.367644]  [<ffffffff815490bb>] netlink_unicast+0x15b/0x240
[195313.373502]  [<ffffffff815494e5>] netlink_sendmsg+0x345/0x3c0
[195313.379335]  [<ffffffff814ff82d>] sock_sendmsg+0x3d/0x50
[195313.384765]  [<ffffffff8150014f>] ___sys_sendmsg+0x28f/0x2a0
[195313.390507]  [<ffffffff815002c1>] ? ___sys_recvmsg+0x161/0x1f0
[195313.396456]  [<ffffffff811f1689>] ? sysctl_head_finish+0x49/0x50
[195313.402546]  [<ffffffff81059730>] ? proc_put_long+0x90/0x90
[195313.408238]  [<ffffffff811f1829>] ? proc_sys_call_handler+0x79/0xc0
[195313.414588]  [<ffffffff811c3f96>] ? fsnotify+0x2e6/0x410
[195313.420020]  [<ffffffff81337958>] ? lockref_put_or_lock+0x58/0x80
[195313.426196]  [<ffffffff811a2495>] ? __fget_light+0x25/0x70
[195313.431799]  [<ffffffff81500a32>] __sys_sendmsg+0x42/0x80
[195313.437281]  [<ffffffff81500a82>] SyS_sendmsg+0x12/0x20
[195313.442749]  [<ffffffff81618197>] system_call_fastpath+0x12/0x6a
[195313.448839] ---[ end trace a6c411e9e8c26904 ]---
[195313.453573] brcmf_cfg80211_change_iface: iface validation failed: err=-16

Johannes Berg

2015-06-17 19:07 UTC #1 lore raw

Quoted 7 lines · Arend van Spriel

Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?

You shouldn't really have a WARN_ON() on a path that can be hit by userspace like that :)

johannes

Rafał Miłecki

2015-06-17 20:32 UTC #2 lore raw

Quoted 11 lines · Johannes Berg

Quoted 7 lines · Arend van Spriel
Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?
You shouldn't really have a WARN_ON() on a path that can be hit by userspace like that :)

I'm pretty sure it was for debugging purposes.

Johannes Berg

2015-06-17 20:34 UTC #3 lore raw

Quoted 4 lines · Rafał Miłecki

Quoted 2 lines
Quoted 2 lines
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came
I'm pretty sure it was for debugging purposes.

Oops, clearly. Sorry about that.

johannes

Arend van Spriel

author

2015-06-17 21:04 UTC #4 lore raw

Quoted 8 lines · Johannes Berg

Quoted 4 lines · Rafał Miłecki
Quoted 2 lines
Quoted 2 lines
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came
I'm pretty sure it was for debugging purposes.
Oops, clearly. Sorry about that.

Yup. Won't be submitting it :-p

Dan Williams

2015-06-18 14:26 UTC #5 lore raw

In reply to Arend van Spriel

Quoted 7 lines · Arend van Spriel

Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?

Which method was that to disable wifi? Also, what NM version are you running?

Dan

Quoted 135 lines

Regards,
Arend

[195312.837736] brcmfmac: brcmf_cfg80211_add_iface enter: wl5ap type 3
[195312.844033] brcmfmac: brcmf_ap_add_vif Adding vif "wl5ap"
[195312.849525] brcmfmac: brcmf_alloc_vif allocating virtual interface 
(size=3136)
[195312.856842] brcmfmac: brcmf_fil_bsscfg_data_set ifidx=0, bssidx=0, 
name=bsscfg:ssid, len=40
[195312.865276] brcmutil: data
[195312.868070] 00000000: 02 00 00 00 05 00 00 00 73 73 69 64 32 00 00 
00  ........ssid2...
[195312.876187] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00  ................
[195312.884301] 00000020: 00 00 00 00 00 00 00 00 
    ........
[195312.891725] brcmfmac: brcmf_sdio_bus_txctl Enter
[195312.896466] brcmfmac: brcmf_sdio_dpc Enter
[195312.900663] brcmfmac: brcmf_sdio_kso_control Enter: on=1
[195312.910548] brcmfmac: brcmf_sdio_isr Enter
[195312.914877] brcmfmac: brcmf_sdio_tx_ctrlframe Enter
[195312.919943] brcmfmac: brcmf_sdio_dpc Enter
[195312.920022] brcmfmac: brcmf_sdio_bus_rxctl Enter
[195312.928967] brcmfmac: brcmf_sdio_isr Enter
[195312.933282] brcmfmac: brcmf_sdio_dpc Dongle reports CHIPACTIVE
[195312.939220] brcmfmac: brcmf_sdio_readframes Enter
[195312.944099] brcmfmac: brcmf_sdio_read_control Enter
[195312.949234] brcmfmac: brcmf_sdio_bus_rxctl resumed on rxctl frame, 
got 68 expected 68
[195312.949310] brcmfmac: brcmf_fweh_event_worker event IF (54) ifidx 1 
bsscfg 2 addr 00:90:4c:70:43:54
[195312.949312] brcmfmac: brcmf_fweh_event_worker   version 2 flags 0 
status 0 reason 0
[195312.949314] brcmutil: event payload, len=5
[195312.949316] 00000000: 01 01 00 02 01 
    .....
[195312.949318] brcmfmac: brcmf_fweh_handle_if_event action: 1 idx: 1 
bsscfg: 2 flags: 0 role: 1
[195312.949320] brcmfmac: brcmf_fweh_handle_if_event adding wl0.2 
(00:90:4c:70:43:54)
[195312.949322] brcmfmac: brcmf_add_if Enter, idx=2, ifidx=1
[195312.949323] brcmfmac: brcmf_add_if allocate netdev interface
[195312.949333] brcmfmac: brcmf_add_if  ==== pid:135f, if:wl0.2 
(00:90:4c:70:43:54) created ===
[195312.949336] brcmfmac: brcmf_fws_macdesc_init enter: desc 
ffff8800bb798b00 ea=00:90:4c:70:43:54, ifidx=1
[195312.949338] brcmfmac: brcmf_fws_add_interface added MACIF:1
[195312.949341] brcmfmac: brcmf_notify_vif_event Enter: action 1 flags 0 
ifidx 1 bsscfg 2
[195312.949403] brcmfmac: brcmf_sdio_dpc Enter
[195312.970325] brcmfmac: brcmf_sdio_kso_control Enter: on=0
[195313.054361] brcmfmac: brcmf_net_attach Enter, idx=2 
mac=00:90:4c:70:43:54
[195313.061537] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.067170] brcmfmac: brcmf_net_attach wl5ap: Broadcom Dongle Host 
Driver
[195313.074637] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.080149] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.085653] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.091877] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.097400] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.102934] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.108825] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.114322] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.119835] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.125593] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.131117] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.136610] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.142185] brcmfmac: brcmf_cfg80211_change_iface Enter, idx=2, type=2
[195313.148804] ------------[ cut here ]------------
[195313.153520] WARNING: CPU: 1 PID: 1398 at 
drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c:864 
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]()
[195313.166897] Modules linked in: brcmfmac(O) brcmutil(O) sdhci_pci

sdhci cfg80211 nfsv3 nfs_acl nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 iptable_mangle xt_tcpudp ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables autofs4 nfs bridge stp llc lockd grace sunrpc fscache dell_wmi sparse_keymap snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic dell_laptop pl2303 usbserial nouveau dcdbas snd_hda_intel snd_hda_controller i8k snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device coretemp crc32c_intel snd_timer mxm_wmi intel_agp microcode serio_raw ttm drm_kms_helper intel_gtt lpc_ich snd drm i2c_algo_bit intel_ips agpgart soundcore mfd_core video mmc_block e1000e ptp firewire_ohci psmouse ahci libahci firewire_core mmc_core crc_itu_t pps_core [last unloaded: cfg80211]

[195313.247913] CPU: 1 PID: 1398 Comm: NetworkManager Tainted: G 
W  O    4.1.0-rc6-wl-testing-x64-00002-gc37b3da #1
[195313.258686] Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07 
02/15/2011
[195313.266107]  ffffffffa0edc918 ffff8800cafef988 ffffffff8161259f 
0000000000000001
[195313.273669]  0000000000000000 ffff8800cafef9c8 ffffffff810537ca 
ffff8800c5483000
[195313.281228]  0000000000000002 ffff8800c5483000 ffff8800b9c36000 
ffff8800b9cc0280
[195313.288787] Call Trace:
[195313.291325]  [<ffffffff8161259f>] dump_stack+0x45/0x57
[195313.296581]  [<ffffffff810537ca>] warn_slowpath_common+0x8a/0xc0
[195313.302669]  [<ffffffff810538ba>] warn_slowpath_null+0x1a/0x20
[195313.308617]  [<ffffffffa0ea9a29>] 
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]
[195313.316460]  [<ffffffffa0e006e4>] cfg80211_change_iface+0x1a4/0x3f0 
[cfg80211]
[195313.323801]  [<ffffffffa0e06dd6>] ? 
__cfg80211_wdev_from_attrs+0x36/0x1a0 [cfg80211]
[195313.331630]  [<ffffffffa0e07ce7>] nl80211_set_interface+0x157/0x230 
[cfg80211]
[195313.338973]  [<ffffffff8154a1e5>] genl_family_rcv_msg+0x1a5/0x3d0
[195313.345148]  [<ffffffff8154a410>] ? genl_family_rcv_msg+0x3d0/0x3d0
[195313.351513]  [<ffffffff8154a4a1>] genl_rcv_msg+0x91/0xd0
[195313.356907]  [<ffffffff81549741>] netlink_rcv_skb+0xc1/0xe0
[195313.362596]  [<ffffffff81549dec>] genl_rcv+0x2c/0x40
[195313.367644]  [<ffffffff815490bb>] netlink_unicast+0x15b/0x240
[195313.373502]  [<ffffffff815494e5>] netlink_sendmsg+0x345/0x3c0
[195313.379335]  [<ffffffff814ff82d>] sock_sendmsg+0x3d/0x50
[195313.384765]  [<ffffffff8150014f>] ___sys_sendmsg+0x28f/0x2a0
[195313.390507]  [<ffffffff815002c1>] ? ___sys_recvmsg+0x161/0x1f0
[195313.396456]  [<ffffffff811f1689>] ? sysctl_head_finish+0x49/0x50
[195313.402546]  [<ffffffff81059730>] ? proc_put_long+0x90/0x90
[195313.408238]  [<ffffffff811f1829>] ? proc_sys_call_handler+0x79/0xc0
[195313.414588]  [<ffffffff811c3f96>] ? fsnotify+0x2e6/0x410
[195313.420020]  [<ffffffff81337958>] ? lockref_put_or_lock+0x58/0x80
[195313.426196]  [<ffffffff811a2495>] ? __fget_light+0x25/0x70
[195313.431799]  [<ffffffff81500a32>] __sys_sendmsg+0x42/0x80
[195313.437281]  [<ffffffff81500a82>] SyS_sendmsg+0x12/0x20
[195313.442749]  [<ffffffff81618197>] system_call_fastpath+0x12/0x6a
[195313.448839] ---[ end trace a6c411e9e8c26904 ]---
[195313.453573] brcmf_cfg80211_change_iface: iface validation failed:

err=-16
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Arend van Spriel

author

2015-06-19 08:00 UTC #6 lore raw

Quoted 11 lines · Dan Williams

Quoted 7 lines · Arend van Spriel
Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?
Which method was that to disable wifi? Also, what NM version are you running?

I used nmcli, ie. nmcli nm wifi off. Running 4.1-rc6 kernel on Ubuntu 14.04. Here nmcli version info:

$ nmcli -v
nmcli tool, version 0.9.8.8

Regards,
Arend

Quoted 139 lines

Dan

Quoted 135 lines

Regards,
Arend

[195312.837736] brcmfmac: brcmf_cfg80211_add_iface enter: wl5ap type 3
[195312.844033] brcmfmac: brcmf_ap_add_vif Adding vif "wl5ap"
[195312.849525] brcmfmac: brcmf_alloc_vif allocating virtual interface
(size=3136)
[195312.856842] brcmfmac: brcmf_fil_bsscfg_data_set ifidx=0, bssidx=0,
name=bsscfg:ssid, len=40
[195312.865276] brcmutil: data
[195312.868070] 00000000: 02 00 00 00 05 00 00 00 73 73 69 64 32 00 00
00  ........ssid2...
[195312.876187] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00  ................
[195312.884301] 00000020: 00 00 00 00 00 00 00 00
     ........
[195312.891725] brcmfmac: brcmf_sdio_bus_txctl Enter
[195312.896466] brcmfmac: brcmf_sdio_dpc Enter
[195312.900663] brcmfmac: brcmf_sdio_kso_control Enter: on=1
[195312.910548] brcmfmac: brcmf_sdio_isr Enter
[195312.914877] brcmfmac: brcmf_sdio_tx_ctrlframe Enter
[195312.919943] brcmfmac: brcmf_sdio_dpc Enter
[195312.920022] brcmfmac: brcmf_sdio_bus_rxctl Enter
[195312.928967] brcmfmac: brcmf_sdio_isr Enter
[195312.933282] brcmfmac: brcmf_sdio_dpc Dongle reports CHIPACTIVE
[195312.939220] brcmfmac: brcmf_sdio_readframes Enter
[195312.944099] brcmfmac: brcmf_sdio_read_control Enter
[195312.949234] brcmfmac: brcmf_sdio_bus_rxctl resumed on rxctl frame,
got 68 expected 68
[195312.949310] brcmfmac: brcmf_fweh_event_worker event IF (54) ifidx 1
bsscfg 2 addr 00:90:4c:70:43:54
[195312.949312] brcmfmac: brcmf_fweh_event_worker   version 2 flags 0
status 0 reason 0
[195312.949314] brcmutil: event payload, len=5
[195312.949316] 00000000: 01 01 00 02 01
     .....
[195312.949318] brcmfmac: brcmf_fweh_handle_if_event action: 1 idx: 1
bsscfg: 2 flags: 0 role: 1
[195312.949320] brcmfmac: brcmf_fweh_handle_if_event adding wl0.2
(00:90:4c:70:43:54)
[195312.949322] brcmfmac: brcmf_add_if Enter, idx=2, ifidx=1
[195312.949323] brcmfmac: brcmf_add_if allocate netdev interface
[195312.949333] brcmfmac: brcmf_add_if  ==== pid:135f, if:wl0.2
(00:90:4c:70:43:54) created ===
[195312.949336] brcmfmac: brcmf_fws_macdesc_init enter: desc
ffff8800bb798b00 ea=00:90:4c:70:43:54, ifidx=1
[195312.949338] brcmfmac: brcmf_fws_add_interface added MACIF:1
[195312.949341] brcmfmac: brcmf_notify_vif_event Enter: action 1 flags 0
ifidx 1 bsscfg 2
[195312.949403] brcmfmac: brcmf_sdio_dpc Enter
[195312.970325] brcmfmac: brcmf_sdio_kso_control Enter: on=0
[195313.054361] brcmfmac: brcmf_net_attach Enter, idx=2
mac=00:90:4c:70:43:54
[195313.061537] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.067170] brcmfmac: brcmf_net_attach wl5ap: Broadcom Dongle Host
Driver
[195313.074637] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.080149] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.085653] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.091877] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.097400] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.102934] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.108825] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.114322] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.119835] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.125593] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.131117] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.136610] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.142185] brcmfmac: brcmf_cfg80211_change_iface Enter, idx=2, type=2
[195313.148804] ------------[ cut here ]------------
[195313.153520] WARNING: CPU: 1 PID: 1398 at
drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c:864
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]()
[195313.166897] Modules linked in: brcmfmac(O) brcmutil(O) sdhci_pci

[195313.247913] CPU: 1 PID: 1398 Comm: NetworkManager Tainted: G
W  O    4.1.0-rc6-wl-testing-x64-00002-gc37b3da #1
[195313.258686] Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07
02/15/2011
[195313.266107]  ffffffffa0edc918 ffff8800cafef988 ffffffff8161259f
0000000000000001
[195313.273669]  0000000000000000 ffff8800cafef9c8 ffffffff810537ca
ffff8800c5483000
[195313.281228]  0000000000000002 ffff8800c5483000 ffff8800b9c36000
ffff8800b9cc0280
[195313.288787] Call Trace:
[195313.291325]  [<ffffffff8161259f>] dump_stack+0x45/0x57
[195313.296581]  [<ffffffff810537ca>] warn_slowpath_common+0x8a/0xc0
[195313.302669]  [<ffffffff810538ba>] warn_slowpath_null+0x1a/0x20
[195313.308617]  [<ffffffffa0ea9a29>]
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]
[195313.316460]  [<ffffffffa0e006e4>] cfg80211_change_iface+0x1a4/0x3f0
[cfg80211]
[195313.323801]  [<ffffffffa0e06dd6>] ?
__cfg80211_wdev_from_attrs+0x36/0x1a0 [cfg80211]
[195313.331630]  [<ffffffffa0e07ce7>] nl80211_set_interface+0x157/0x230
[cfg80211]
[195313.338973]  [<ffffffff8154a1e5>] genl_family_rcv_msg+0x1a5/0x3d0
[195313.345148]  [<ffffffff8154a410>] ? genl_family_rcv_msg+0x3d0/0x3d0
[195313.351513]  [<ffffffff8154a4a1>] genl_rcv_msg+0x91/0xd0
[195313.356907]  [<ffffffff81549741>] netlink_rcv_skb+0xc1/0xe0
[195313.362596]  [<ffffffff81549dec>] genl_rcv+0x2c/0x40
[195313.367644]  [<ffffffff815490bb>] netlink_unicast+0x15b/0x240
[195313.373502]  [<ffffffff815494e5>] netlink_sendmsg+0x345/0x3c0
[195313.379335]  [<ffffffff814ff82d>] sock_sendmsg+0x3d/0x50
[195313.384765]  [<ffffffff8150014f>] ___sys_sendmsg+0x28f/0x2a0
[195313.390507]  [<ffffffff815002c1>] ? ___sys_recvmsg+0x161/0x1f0
[195313.396456]  [<ffffffff811f1689>] ? sysctl_head_finish+0x49/0x50
[195313.402546]  [<ffffffff81059730>] ? proc_put_long+0x90/0x90
[195313.408238]  [<ffffffff811f1829>] ? proc_sys_call_handler+0x79/0xc0
[195313.414588]  [<ffffffff811c3f96>] ? fsnotify+0x2e6/0x410
[195313.420020]  [<ffffffff81337958>] ? lockref_put_or_lock+0x58/0x80
[195313.426196]  [<ffffffff811a2495>] ? __fget_light+0x25/0x70
[195313.431799]  [<ffffffff81500a32>] __sys_sendmsg+0x42/0x80
[195313.437281]  [<ffffffff81500a82>] SyS_sendmsg+0x12/0x20
[195313.442749]  [<ffffffff81618197>] system_call_fastpath+0x12/0x6a
[195313.448839] ---[ end trace a6c411e9e8c26904 ]---
[195313.453573] brcmf_cfg80211_change_iface: iface validation failed:

err=-16
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Dan Williams

2015-06-21 03:13 UTC #7 lore raw

Quoted 10 lines · Arend van Spriel

Quoted 9 lines · Dan Williams
Quoted 7 lines · Arend van Spriel
Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?

Quoted 8 lines

Quoted 2 lines
Which method was that to disable wifi? Also, what NM version are you running?
I used nmcli, ie. nmcli nm wifi off. Running 4.1-rc6 kernel on Ubuntu 14.04. Here nmcli version info:
$ nmcli -v
nmcli tool, version 0.9.8.8

Yeah, unfortunately that won't work with 0.9.8.8 for AP-mode interfaces. It appears that NM still re-sets interfaces to STA mode when cleaning/initializing them, including when moving from UNMANAGED -> UNAVAILABLE states where they stay until 'wifi on' is done. The only reason it does this is that some drivers used to be *awful* at scanning in ad-hoc mode. But these days NM should really just stop doing this; so I filed:

https://bugzilla.gnome.org/show_bug.cgi?id=751269

At least with NM 0.9.10 and later you can set the interface to be unmanaged using interface names, and you can also disable the wifi plugin entirely as well.

But for the 2013-era 0.9.8, if you're able to control the MAC address of the new AP interface, you can add that to the 'unmanaged-devices' line in NetworkManager.conf.

Dan

Quoted 143 lines

Regards,
Arend

Quoted 139 lines

Dan

Quoted 135 lines

Regards,
Arend

[195312.837736] brcmfmac: brcmf_cfg80211_add_iface enter: wl5ap type 3
[195312.844033] brcmfmac: brcmf_ap_add_vif Adding vif "wl5ap"
[195312.849525] brcmfmac: brcmf_alloc_vif allocating virtual interface
(size=3136)
[195312.856842] brcmfmac: brcmf_fil_bsscfg_data_set ifidx=0, bssidx=0,
name=bsscfg:ssid, len=40
[195312.865276] brcmutil: data
[195312.868070] 00000000: 02 00 00 00 05 00 00 00 73 73 69 64 32 00 00
00  ........ssid2...
[195312.876187] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00  ................
[195312.884301] 00000020: 00 00 00 00 00 00 00 00
     ........
[195312.891725] brcmfmac: brcmf_sdio_bus_txctl Enter
[195312.896466] brcmfmac: brcmf_sdio_dpc Enter
[195312.900663] brcmfmac: brcmf_sdio_kso_control Enter: on=1
[195312.910548] brcmfmac: brcmf_sdio_isr Enter
[195312.914877] brcmfmac: brcmf_sdio_tx_ctrlframe Enter
[195312.919943] brcmfmac: brcmf_sdio_dpc Enter
[195312.920022] brcmfmac: brcmf_sdio_bus_rxctl Enter
[195312.928967] brcmfmac: brcmf_sdio_isr Enter
[195312.933282] brcmfmac: brcmf_sdio_dpc Dongle reports CHIPACTIVE
[195312.939220] brcmfmac: brcmf_sdio_readframes Enter
[195312.944099] brcmfmac: brcmf_sdio_read_control Enter
[195312.949234] brcmfmac: brcmf_sdio_bus_rxctl resumed on rxctl frame,
got 68 expected 68
[195312.949310] brcmfmac: brcmf_fweh_event_worker event IF (54) ifidx 1
bsscfg 2 addr 00:90:4c:70:43:54
[195312.949312] brcmfmac: brcmf_fweh_event_worker   version 2 flags 0
status 0 reason 0
[195312.949314] brcmutil: event payload, len=5
[195312.949316] 00000000: 01 01 00 02 01
     .....
[195312.949318] brcmfmac: brcmf_fweh_handle_if_event action: 1 idx: 1
bsscfg: 2 flags: 0 role: 1
[195312.949320] brcmfmac: brcmf_fweh_handle_if_event adding wl0.2
(00:90:4c:70:43:54)
[195312.949322] brcmfmac: brcmf_add_if Enter, idx=2, ifidx=1
[195312.949323] brcmfmac: brcmf_add_if allocate netdev interface
[195312.949333] brcmfmac: brcmf_add_if  ==== pid:135f, if:wl0.2
(00:90:4c:70:43:54) created ===
[195312.949336] brcmfmac: brcmf_fws_macdesc_init enter: desc
ffff8800bb798b00 ea=00:90:4c:70:43:54, ifidx=1
[195312.949338] brcmfmac: brcmf_fws_add_interface added MACIF:1
[195312.949341] brcmfmac: brcmf_notify_vif_event Enter: action 1 flags 0
ifidx 1 bsscfg 2
[195312.949403] brcmfmac: brcmf_sdio_dpc Enter
[195312.970325] brcmfmac: brcmf_sdio_kso_control Enter: on=0
[195313.054361] brcmfmac: brcmf_net_attach Enter, idx=2
mac=00:90:4c:70:43:54
[195313.061537] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.067170] brcmfmac: brcmf_net_attach wl5ap: Broadcom Dongle Host
Driver
[195313.074637] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.080149] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.085653] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.091877] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.097400] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.102934] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.108825] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.114322] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.119835] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.125593] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.131117] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.136610] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.142185] brcmfmac: brcmf_cfg80211_change_iface Enter, idx=2, type=2
[195313.148804] ------------[ cut here ]------------
[195313.153520] WARNING: CPU: 1 PID: 1398 at
drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c:864
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]()
[195313.166897] Modules linked in: brcmfmac(O) brcmutil(O) sdhci_pci

[195313.247913] CPU: 1 PID: 1398 Comm: NetworkManager Tainted: G
W  O    4.1.0-rc6-wl-testing-x64-00002-gc37b3da #1
[195313.258686] Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07
02/15/2011
[195313.266107]  ffffffffa0edc918 ffff8800cafef988 ffffffff8161259f
0000000000000001
[195313.273669]  0000000000000000 ffff8800cafef9c8 ffffffff810537ca
ffff8800c5483000
[195313.281228]  0000000000000002 ffff8800c5483000 ffff8800b9c36000
ffff8800b9cc0280
[195313.288787] Call Trace:
[195313.291325]  [<ffffffff8161259f>] dump_stack+0x45/0x57
[195313.296581]  [<ffffffff810537ca>] warn_slowpath_common+0x8a/0xc0
[195313.302669]  [<ffffffff810538ba>] warn_slowpath_null+0x1a/0x20
[195313.308617]  [<ffffffffa0ea9a29>]
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]
[195313.316460]  [<ffffffffa0e006e4>] cfg80211_change_iface+0x1a4/0x3f0
[cfg80211]
[195313.323801]  [<ffffffffa0e06dd6>] ?
__cfg80211_wdev_from_attrs+0x36/0x1a0 [cfg80211]
[195313.331630]  [<ffffffffa0e07ce7>] nl80211_set_interface+0x157/0x230
[cfg80211]
[195313.338973]  [<ffffffff8154a1e5>] genl_family_rcv_msg+0x1a5/0x3d0
[195313.345148]  [<ffffffff8154a410>] ? genl_family_rcv_msg+0x3d0/0x3d0
[195313.351513]  [<ffffffff8154a4a1>] genl_rcv_msg+0x91/0xd0
[195313.356907]  [<ffffffff81549741>] netlink_rcv_skb+0xc1/0xe0
[195313.362596]  [<ffffffff81549dec>] genl_rcv+0x2c/0x40
[195313.367644]  [<ffffffff815490bb>] netlink_unicast+0x15b/0x240
[195313.373502]  [<ffffffff815494e5>] netlink_sendmsg+0x345/0x3c0
[195313.379335]  [<ffffffff814ff82d>] sock_sendmsg+0x3d/0x50
[195313.384765]  [<ffffffff8150014f>] ___sys_sendmsg+0x28f/0x2a0
[195313.390507]  [<ffffffff815002c1>] ? ___sys_recvmsg+0x161/0x1f0
[195313.396456]  [<ffffffff811f1689>] ? sysctl_head_finish+0x49/0x50
[195313.402546]  [<ffffffff81059730>] ? proc_put_long+0x90/0x90
[195313.408238]  [<ffffffff811f1829>] ? proc_sys_call_handler+0x79/0xc0
[195313.414588]  [<ffffffff811c3f96>] ? fsnotify+0x2e6/0x410
[195313.420020]  [<ffffffff81337958>] ? lockref_put_or_lock+0x58/0x80
[195313.426196]  [<ffffffff811a2495>] ? __fget_light+0x25/0x70
[195313.431799]  [<ffffffff81500a32>] __sys_sendmsg+0x42/0x80
[195313.437281]  [<ffffffff81500a82>] SyS_sendmsg+0x12/0x20
[195313.442749]  [<ffffffff81618197>] system_call_fastpath+0x12/0x6a
[195313.448839] ---[ end trace a6c411e9e8c26904 ]---
[195313.453573] brcmf_cfg80211_change_iface: iface validation failed:

err=-16
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Quoted 4 lines

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Arend van Spriel

author

2015-06-21 11:11 UTC #8 lore raw

Quoted 30 lines · Dan Williams

Quoted 10 lines · Arend van Spriel
Quoted 9 lines · Dan Williams
Quoted 7 lines · Arend van Spriel
Hi Dan,
When I create an AP interface using iw, it is followed by a change interface back to managed mode. I added a WARN_ON to see where it came from and it turns out to be the NetworkManager. However, I had disabled wifi as you suggested on the mailing list once. What is your take on
this: bug or intentional?
Quoted 8 lines
Quoted 2 lines
Which method was that to disable wifi? Also, what NM version are you running?
I used nmcli, ie. nmcli nm wifi off. Running 4.1-rc6 kernel on Ubuntu 14.04. Here nmcli version info:
$ nmcli -v
nmcli tool, version 0.9.8.8
Yeah, unfortunately that won't work with 0.9.8.8 for AP-mode interfaces. It appears that NM still re-sets interfaces to STA mode when cleaning/initializing them, including when moving from UNMANAGED -> UNAVAILABLE states where they stay until 'wifi on' is done. The only reason it does this is that some drivers used to be *awful* at scanning in ad-hoc mode. But these days NM should really just stop doing this; so I filed:
https://bugzilla.gnome.org/show_bug.cgi?id=751269

Quoted 7 lines

At least with NM 0.9.10 and later you can set the interface to be unmanaged using interface names, and you can also disable the wifi plugin entirely as well.
But for the 2013-era 0.9.8, if you're able to control the MAC address of the new AP interface, you can add that to the 'unmanaged-devices' line in NetworkManager.conf.

Thanks, Dan

I suspect we will be using 14.04 LTS for a while so I will look into the 'unmanaged-devices' configuration.

Regards,
Arend

Quoted 151 lines

Dan

Quoted 147 lines

Regards,
Arend

Quoted 139 lines

Dan

Quoted 135 lines

Regards,
Arend

[195312.837736] brcmfmac: brcmf_cfg80211_add_iface enter: wl5ap type 3
[195312.844033] brcmfmac: brcmf_ap_add_vif Adding vif "wl5ap"
[195312.849525] brcmfmac: brcmf_alloc_vif allocating virtual interface
(size=3136)
[195312.856842] brcmfmac: brcmf_fil_bsscfg_data_set ifidx=0, bssidx=0,
name=bsscfg:ssid, len=40
[195312.865276] brcmutil: data
[195312.868070] 00000000: 02 00 00 00 05 00 00 00 73 73 69 64 32 00 00
00  ........ssid2...
[195312.876187] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00  ................
[195312.884301] 00000020: 00 00 00 00 00 00 00 00
      ........
[195312.891725] brcmfmac: brcmf_sdio_bus_txctl Enter
[195312.896466] brcmfmac: brcmf_sdio_dpc Enter
[195312.900663] brcmfmac: brcmf_sdio_kso_control Enter: on=1
[195312.910548] brcmfmac: brcmf_sdio_isr Enter
[195312.914877] brcmfmac: brcmf_sdio_tx_ctrlframe Enter
[195312.919943] brcmfmac: brcmf_sdio_dpc Enter
[195312.920022] brcmfmac: brcmf_sdio_bus_rxctl Enter
[195312.928967] brcmfmac: brcmf_sdio_isr Enter
[195312.933282] brcmfmac: brcmf_sdio_dpc Dongle reports CHIPACTIVE
[195312.939220] brcmfmac: brcmf_sdio_readframes Enter
[195312.944099] brcmfmac: brcmf_sdio_read_control Enter
[195312.949234] brcmfmac: brcmf_sdio_bus_rxctl resumed on rxctl frame,
got 68 expected 68
[195312.949310] brcmfmac: brcmf_fweh_event_worker event IF (54) ifidx 1
bsscfg 2 addr 00:90:4c:70:43:54
[195312.949312] brcmfmac: brcmf_fweh_event_worker   version 2 flags 0
status 0 reason 0
[195312.949314] brcmutil: event payload, len=5
[195312.949316] 00000000: 01 01 00 02 01
      .....
[195312.949318] brcmfmac: brcmf_fweh_handle_if_event action: 1 idx: 1
bsscfg: 2 flags: 0 role: 1
[195312.949320] brcmfmac: brcmf_fweh_handle_if_event adding wl0.2
(00:90:4c:70:43:54)
[195312.949322] brcmfmac: brcmf_add_if Enter, idx=2, ifidx=1
[195312.949323] brcmfmac: brcmf_add_if allocate netdev interface
[195312.949333] brcmfmac: brcmf_add_if  ==== pid:135f, if:wl0.2
(00:90:4c:70:43:54) created ===
[195312.949336] brcmfmac: brcmf_fws_macdesc_init enter: desc
ffff8800bb798b00 ea=00:90:4c:70:43:54, ifidx=1
[195312.949338] brcmfmac: brcmf_fws_add_interface added MACIF:1
[195312.949341] brcmfmac: brcmf_notify_vif_event Enter: action 1 flags 0
ifidx 1 bsscfg 2
[195312.949403] brcmfmac: brcmf_sdio_dpc Enter
[195312.970325] brcmfmac: brcmf_sdio_kso_control Enter: on=0
[195313.054361] brcmfmac: brcmf_net_attach Enter, idx=2
mac=00:90:4c:70:43:54
[195313.061537] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.067170] brcmfmac: brcmf_net_attach wl5ap: Broadcom Dongle Host
Driver
[195313.074637] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.080149] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.085653] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.091877] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.097400] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.102934] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.108825] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.114322] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.119835] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.125593] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.131117] brcmfmac: brcmf_netdev_get_stats Enter, idx=0
[195313.136610] brcmfmac: brcmf_netdev_get_stats Enter, idx=2
[195313.142185] brcmfmac: brcmf_cfg80211_change_iface Enter, idx=2, type=2
[195313.148804] ------------[ cut here ]------------
[195313.153520] WARNING: CPU: 1 PID: 1398 at
drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c:864
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]()
[195313.166897] Modules linked in: brcmfmac(O) brcmutil(O) sdhci_pci

[195313.247913] CPU: 1 PID: 1398 Comm: NetworkManager Tainted: G
W  O    4.1.0-rc6-wl-testing-x64-00002-gc37b3da #1
[195313.258686] Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07
02/15/2011
[195313.266107]  ffffffffa0edc918 ffff8800cafef988 ffffffff8161259f
0000000000000001
[195313.273669]  0000000000000000 ffff8800cafef9c8 ffffffff810537ca
ffff8800c5483000
[195313.281228]  0000000000000002 ffff8800c5483000 ffff8800b9c36000
ffff8800b9cc0280
[195313.288787] Call Trace:
[195313.291325]  [<ffffffff8161259f>] dump_stack+0x45/0x57
[195313.296581]  [<ffffffff810537ca>] warn_slowpath_common+0x8a/0xc0
[195313.302669]  [<ffffffff810538ba>] warn_slowpath_null+0x1a/0x20
[195313.308617]  [<ffffffffa0ea9a29>]
brcmf_cfg80211_change_iface+0x2a9/0x2d0 [brcmfmac]
[195313.316460]  [<ffffffffa0e006e4>] cfg80211_change_iface+0x1a4/0x3f0
[cfg80211]
[195313.323801]  [<ffffffffa0e06dd6>] ?
__cfg80211_wdev_from_attrs+0x36/0x1a0 [cfg80211]
[195313.331630]  [<ffffffffa0e07ce7>] nl80211_set_interface+0x157/0x230
[cfg80211]
[195313.338973]  [<ffffffff8154a1e5>] genl_family_rcv_msg+0x1a5/0x3d0
[195313.345148]  [<ffffffff8154a410>] ? genl_family_rcv_msg+0x3d0/0x3d0
[195313.351513]  [<ffffffff8154a4a1>] genl_rcv_msg+0x91/0xd0
[195313.356907]  [<ffffffff81549741>] netlink_rcv_skb+0xc1/0xe0
[195313.362596]  [<ffffffff81549dec>] genl_rcv+0x2c/0x40
[195313.367644]  [<ffffffff815490bb>] netlink_unicast+0x15b/0x240
[195313.373502]  [<ffffffff815494e5>] netlink_sendmsg+0x345/0x3c0
[195313.379335]  [<ffffffff814ff82d>] sock_sendmsg+0x3d/0x50
[195313.384765]  [<ffffffff8150014f>] ___sys_sendmsg+0x28f/0x2a0
[195313.390507]  [<ffffffff815002c1>] ? ___sys_recvmsg+0x161/0x1f0
[195313.396456]  [<ffffffff811f1689>] ? sysctl_head_finish+0x49/0x50
[195313.402546]  [<ffffffff81059730>] ? proc_put_long+0x90/0x90
[195313.408238]  [<ffffffff811f1829>] ? proc_sys_call_handler+0x79/0xc0
[195313.414588]  [<ffffffff811c3f96>] ? fsnotify+0x2e6/0x410
[195313.420020]  [<ffffffff81337958>] ? lockref_put_or_lock+0x58/0x80
[195313.426196]  [<ffffffff811a2495>] ? __fget_light+0x25/0x70
[195313.431799]  [<ffffffff81500a32>] __sys_sendmsg+0x42/0x80
[195313.437281]  [<ffffffff81500a82>] SyS_sendmsg+0x12/0x20
[195313.442749]  [<ffffffff81618197>] system_call_fastpath+0x12/0x6a
[195313.448839] ---[ end trace a6c411e9e8c26904 ]---
[195313.453573] brcmf_cfg80211_change_iface: iface validation failed:

err=-16
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