[FS#273] mac80211 IBSS: Error print on IBSS join

Mon Nov 7 02:13:49 PST 2016

A new Flyspray task has been opened.  Details are below. 

User who did this - Koen Vandeputte (xback) 

Attached to Project - LEDE Project
Summary - mac80211 IBSS: Error print on IBSS join
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details -  Hardware:
- Gateworks iMX6
- Radio MiktroTik R11e-5HnD

LEDE version used:
578f7b9c597b0ea9bcf0726cc681713c0672edfe

Repro rate:
1%

After some time in a IBSS setup, following below appeared
When it does, the connection still works but it still doesnt look fine and could lead to worse.. :

If more info is required, please let me know.
The board showing this error is still running in this state.

[  743.735572] device wlan0 entered promiscuous mode
[  748.945565] device wlan0 left promiscuous mode
[ 1102.652670] ------------[ cut here ]------------
[ 1102.652763] WARNING: CPU: 0 PID: 4070 at compat-wireless-2016-10-08/net/mac80211/sta_info.c:451 sta_info_insert_rcu+0x78/0x594 [mac80211]()
[ 1102.652772] Modules linked in: mbt_netlink mbt ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath sierra pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 mac80211 ipt_REJECT ipt_MASQUERADE ftdi_sio ebtable_nat ebtable_filter ebtable_broute cfg80211 xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_id xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_NETMAP xt_LOG xt_HL xt_DSCP xt_DNETMAP xt_CT xt_CLASSIFY usbserial ts_kmp ts_fsm ts_bm slhc sky2 nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_netlink nf_conntrack_ftp iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables flexcan ebtables ebt_vlan ebt_stp ebt_snat ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_ip ebt_dnat ebt_arpreply ebt_arp ebt_among ebt_802_3 crc_ccitt compat_xtables compat can_raw can_dev can br_netfilter at24 em_cmp sch_teql em_nbyte sch_tbf sch_dsmark sch_pie sch_codel sch_gred sch_htb cls_basic act_ipt sch_prio em_text em_meta act_police sch_red sch_sfq sch_fq act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress gsc hwmon snd_soc_imx_sgtl5000 snd_soc_sgtl5000 snd_soc_fsl_ssi imx_pcm_dma snd_soc_imx_audmux snd_soc_core ledtrig_heartbeat xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables gw16083 igb i2c_algo_bit ifb dummy tun snd_pcm_dmaengine snd_compress snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_rawmidi snd_seq_device snd_hwdep snd input_core soundcore leds_gpio phy_mxs_usb ci_hdrc_imx usbmisc_imx ci_hdrc udc_core uhci_hcd ehci_platform ehci_hcd usbcore usb_common pps_gpio
[ 1102.653485] CPU: 0 PID: 4070 Comm: kworker/u4:0 Not tainted 4.4.30 #0
[ 1102.653495] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 1102.653564] Workqueue: phy0 ieee80211_iface_work [mac80211]
[ 1102.653574] Backtrace: 
[ 1102.653600] [] (dump_backtrace) from [] (show_stack+0x18/0x1c)
[ 1102.653609]  r7:000001c3 r6:7f4a94e2 r5:60000013 r4:00000000
[ 1102.653640] [] (show_stack) from [] (dump_stack+0x84/0xa4)
[ 1102.653664] [] (dump_stack) from [] (warn_slowpath_common+0x8c/0xb8)
[ 1102.653671]  r5:00000009 r4:00000000
[ 1102.653695] [] (warn_slowpath_common) from [] (warn_slowpath_null+0x24/0x2c)
[ 1102.653703]  r8:9ec3ea08 r7:9ec3e950 r6:9ec3e480 r5:9e4ee000 r4:9ebbcfb4
[ 1102.653780] [] (warn_slowpath_null) from [] (sta_info_insert_rcu+0x78/0x594 [mac80211])
[ 1102.653867] [] (sta_info_insert_rcu [mac80211]) from [] (__ieee80211_sta_join_ibss+0x614/0x1060 [mac80211])
[ 1102.653875]  r10:00000088 r9:9f7f0400 r8:9ec3ea08 r7:9ec3e950 r6:9ec3e480 r5:9ec3ea04
[ 1102.653898]  r4:9e4ee000
[ 1102.653978] [] (__ieee80211_sta_join_ibss [mac80211]) from [] (ieee80211_ibss_work+0x7c/0x430 [mac80211])
[ 1102.653986]  r6:9e4ee000 r5:9ec3ea04 r4:9ec3e480
[ 1102.654072] [] (ieee80211_ibss_work [mac80211]) from [] (ieee80211_iface_work+0x33c/0x598 [mac80211])
[ 1102.654080]  r10:00000088 r9:9f7f0400 r8:9ec3e884 r7:9ebbcb60 r6:00000000 r5:9ec3e480
[ 1102.654103]  r4:9f5a2e80
[ 1102.654158] [] (ieee80211_iface_work [mac80211]) from [] (process_one_work+0x1e0/0x318)
[ 1102.654165]  r10:00000088 r9:9f7f0400 r8:00000000 r7:9f5a2e98 r6:9ec3e884 r5:9f40bc00
[ 1102.654187]  r4:9f5a2e80
[ 1102.654208] [] (process_one_work) from [] (worker_thread+0x2e0/0x430)
[ 1102.654215]  r10:00000088 r9:00000000 r8:9f40bc14 r7:9f5a2e98 r6:9f40bc00 r5:9f40bc00
[ 1102.654238]  r4:9f5a2e80
[ 1102.654262] [] (worker_thread) from [] (kthread+0xe0/0xf4)
[ 1102.654269]  r10:00000000 r9:00000000 r8:00000000 r7:80046008 r6:9f5a2e80 r5:00000000
[ 1102.654290]  r4:9e641b00 r3:9ef65400
[ 1102.654316] [] (kthread) from [] (ret_from_fork+0x14/0x3c)
[ 1102.654323]  r7:00000000 r6:00000000 r5:8004a420 r4:9e641b00
[ 1102.654342] ---[ end trace 2a69f6e20e6ebe6c ]---
[ node-11 ] 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=273