[FS#334] ath5k: kernel warning every 10 minutes

LEDE Bugs lede-bugs at lists.infradead.org
Mon Dec 12 05:00:45 PST 2016


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FS#334 - ath5k: kernel warning every 10 minutes
User who did this: Stijn Tintel (stintel)
Task details edited:
-------
Device: Ubiquiti Routerstation Pro, 1x Mikrotik R52n, 1x Ubiquiti SR71-A, 1x Ubiquiti XR2
LEDE r2473-b305b8c 

While testing 802.11w on ath5k, I noticed that a kernel warning occurs every 10 minutes, or when running "wifi". This happens even when no clients are associated. To make sure it is unrelated to my 802.11w changes, I tested with unmodified LEDE r2473-b305b8c.

As this image is built with ath9k enabled, hostapd is compiled with 802.11w support, and the config below works with 802.11w enabled for the ath5k interface. When 802.11w is disabled for the ath5k interface, the kernel warning doesn't occur. As soon as I enable it (optional or required), the kernel warning starts appearing every 10 minutes.

Wireless config:

config wifi-device 'radio0'
        option type 'mac80211'
        option channel '11'
        option country 'BE'
        option hwmode '11g'
        option txpower '10'
        option path 'pci0000:00/0000:00:12.0'
        option disabled '0'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'lan'
        option mode 'ap'
        option ssid 'LEDE'
        option encryption 'psk2'
        option key 'edellede'
        option ieee80211w '2'

config wifi-device 'radio1'
        option type 'mac80211'
        option channel '11'
        option country 'BE'
        option hwmode '11g'
        option txpower '13'
        option path 'pci0000:00/0000:00:11.0'
        option htmode 'HT20'
        option disabled '1'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option network 'lan'
        option mode 'ap'
        option ssid 'LEDE'
        option encryption 'psk2'
        option key 'edellede'
        option ieee80211w '2'

config wifi-device 'radio2'
        option type 'mac80211'
        option channel '11'
        option country 'BE'
        option hwmode '11g'
        option path 'pci0000:00/0000:00:13.0'
        option htmode 'HT20'
        option disabled '1'

config wifi-iface 'default_radio2'
        option device 'radio2'
        option network 'lan'
        option mode 'ap'
        option ssid 'LEDE'
        option encryption 'psk2'
        option key 'edellede'
        option ieee80211w '2'


Kernel log:

[   32.052530] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   32.074984] device wlan0 entered promiscuous mode
[   32.079780] br-lan: port 2(wlan0) entered forwarding state
[   32.085357] br-lan: port 2(wlan0) entered forwarding state
[   32.451638] br-lan: port 2(wlan0) entered disabled state
[   33.749319] ------------[ cut here ]------------
[   33.754055] WARNING: CPU: 0 PID: 1780 at compat-wireless-2016-10-08/drivers/net/wireless/ath/ath5k/mac80211-ops.c:500 ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]()
[   33.768752] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath5k ath pppox ppp_generic nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_recent xt_quota xt_policy xt_pkttype xt_physdev xt_owner xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange xt_id xt_hl xt_helper xt_esp xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_addrtype xt_TCPMSS xt_REDIRECT xt_NFQUEUE xt_NFLOG xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY ts_kmp ts_fsm ts_bm slhc nfnetlink_queue nfnetlink_log nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_rtsp nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast iptable_raw iptable_mangle iptable_filter ipt_ah ipt_ECN ip_tables crc7 crc_itu_t crc_ccitt compat br_netfilter sch_cake sch_teql em_nbyte sch_codel sch_prio sch_pie act_ipt sch_tbf sch_gred sch_dsmark cls_basic em_text em_meta sch_htb sch_sfq act_police sch_fq em_cmp sch_red act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress 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 ifb ip6_vti ip_vti sit ipcomp6 xfrm6_tunnel xfrm6_mode_tunnel xfrm6_mode_transport xfrm6_mode_beet esp6 ah6 ipcomp xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 ip6_tunnel tunnel6 tunnel4 ip_tunnel tun af_key xfrm_user xfrm_ipcomp xfrm_algo nls_utf8 nls_iso8859_15 nls_iso8859_1 vxlan udp_tunnel ip6_udp_tunnel sha512_generic sha256_generic sha1_generic seqiv jitterentropy_rng drbg md5 hmac ghash_generic gf128mul gcm echainiv des_generic deflate zlib_inflate zlib_deflate ctr cbc authenc mmc_block usb_storage mmc_core ohci_platform ohci_hcd ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache button_hotplug input_core usbcore nls_base usb_common crc16 cryptomgr aead crypto_null crc32c_generic crypto_hash
[   34.009197] CPU: 0 PID: 1780 Comm: hostapd Not tainted 4.4.36 #0
[   34.015227] Stack : 00000000 00000000 804a6542 00000034 803d7380 00000000 00000001 80450000
[   34.015227]    80430000 8043ae43 803d3a34 000006f4 804a379c 00000000 00000000 00000004
[   34.015227]    00000000 800a92a4 803d90a0 80430000 00000003 00000000 803d74ac 86b8ba54
[   34.015227]    804a379c 800a7140 80430000 00000000 00000001 80201800 00000000 00000000
[   34.015227]    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   34.015227]    ...
[   34.051247] Call Trace:
[   34.053707] [] show_stack+0x64/0xb0
[   34.058088] [] warn_slowpath_common+0xa0/0xd0
[   34.063344] [] warn_slowpath_null+0x18/0x24
[   34.068432] [] ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]
[   34.074819] 
[   34.076310] ---[ end trace 0dabd211d3d954a3 ]---
[   34.080958] wlan0: failed to set key (4, ff:ff:ff:ff:ff:ff) to hardware (-22)
[   34.088794] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   34.095365] br-lan: port 2(wlan0) entered forwarding state
[   34.100958] br-lan: port 2(wlan0) entered forwarding state
[  633.718441] ------------[ cut here ]------------
[  633.723190] WARNING: CPU: 0 PID: 2155 at compat-wireless-2016-10-08/drivers/net/wireless/ath/ath5k/mac80211-ops.c:500 ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]()
[  633.737896] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath5k ath pppox ppp_generic nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_recent xt_quota xt_policy xt_pkttype xt_physdev xt_owner xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange xt_id xt_hl xt_helper xt_esp xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_addrtype xt_TCPMSS xt_REDIRECT xt_NFQUEUE xt_NFLOG xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY ts_kmp ts_fsm ts_bm slhc nfnetlink_queue nfnetlink_log nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_rtsp nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast iptable_raw iptable_mangle iptable_filter ipt_ah ipt_ECN ip_tables crc7 crc_itu_t crc_ccitt compat br_netfilter sch_cake sch_teql em_nbyte sch_codel sch_prio sch_pie act_ipt sch_tbf sch_gred sch_dsmark cls_basic em_text em_meta sch_htb sch_sfq act_police sch_fq em_cmp sch_red act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress 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 ifb ip6_vti ip_vti sit ipcomp6 xfrm6_tunnel xfrm6_mode_tunnel xfrm6_mode_transport xfrm6_mode_beet esp6 ah6 ipcomp xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 ip6_tunnel tunnel6 tunnel4 ip_tunnel tun af_key xfrm_user xfrm_ipcomp xfrm_algo nls_utf8 nls_iso8859_15 nls_iso8859_1 vxlan udp_tunnel ip6_udp_tunnel sha512_generic sha256_generic sha1_generic seqiv jitterentropy_rng drbg md5 hmac ghash_generic gf128mul gcm echainiv des_generic deflate zlib_inflate zlib_deflate ctr cbc authenc mmc_block usb_storage mmc_core ohci_platform ohci_hcd ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache button_hotplug input_core usbcore nls_base usb_common crc16 cryptomgr aead crypto_null crc32c_generic crypto_hash
[  633.978364] CPU: 0 PID: 2155 Comm: hostapd Tainted: G        W       4.4.36 #0
[  633.985621] Stack : 00000000 00000000 804a6542 00000042 803d7380 00000000 00000001 80450000
[  633.985621]    80430000 8043ae43 803d3a34 0000086b 804a379c 00000000 00000000 00000005
[  633.985621]    00000000 800a92a4 803d90a0 80430000 00000003 00000000 803d74ac 86b89a54
[  633.985621]    804a379c 800a7140 80430000 00000000 80439f50 80201800 00000000 00000000
[  633.985621]    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  633.985621]    ...
[  634.021615] Call Trace:
[  634.024083] [] show_stack+0x64/0xb0
[  634.028465] [] warn_slowpath_common+0xa0/0xd0
[  634.033721] [] warn_slowpath_null+0x18/0x24
[  634.038810] [] ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]
[  634.045208] 
[  634.046704] ---[ end trace 0dabd211d3d954a4 ]---
[  634.051353] wlan0: failed to set key (5, ff:ff:ff:ff:ff:ff) to hardware (-22)
[ 1234.068642] ------------[ cut here ]------------
[ 1234.073426] WARNING: CPU: 0 PID: 2155 at compat-wireless-2016-10-08/drivers/net/wireless/ath/ath5k/mac80211-ops.c:500 ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]()
[ 1234.088094] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath5k ath pppox ppp_generic nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_recent xt_quota xt_policy xt_pkttype xt_physdev xt_owner xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange xt_id xt_hl xt_helper xt_esp xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_addrtype xt_TCPMSS xt_REDIRECT xt_NFQUEUE xt_NFLOG xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY ts_kmp ts_fsm ts_bm slhc nfnetlink_queue nfnetlink_log nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_rtsp nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast iptable_raw iptable_mangle iptable_filter ipt_ah ipt_ECN ip_tables crc7 crc_itu_t crc_ccitt compat br_netfilter sch_cake sch_teql em_nbyte sch_codel sch_prio sch_pie act_ipt sch_tbf sch_gred sch_dsmark cls_basic em_text em_meta sch_htb sch_sfq act_police sch_fq em_cmp sch_red act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress 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 ifb ip6_vti ip_vti sit ipcomp6 xfrm6_tunnel xfrm6_mode_tunnel xfrm6_mode_transport xfrm6_mode_beet esp6 ah6 ipcomp xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 ip6_tunnel tunnel6 tunnel4 ip_tunnel tun af_key xfrm_user xfrm_ipcomp xfrm_algo nls_utf8 nls_iso8859_15 nls_iso8859_1 vxlan udp_tunnel ip6_udp_tunnel sha512_generic sha256_generic sha1_generic seqiv jitterentropy_rng drbg md5 hmac ghash_generic gf128mul gcm echainiv des_generic deflate zlib_inflate zlib_deflate ctr cbc authenc mmc_block usb_storage mmc_core ohci_platform ohci_hcd ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache button_hotplug input_core usbcore nls_base usb_common crc16 cryptomgr aead crypto_null crc32c_generic crypto_hash
[ 1234.328545] CPU: 0 PID: 2155 Comm: hostapd Tainted: G        W       4.4.36 #0
[ 1234.335802] Stack : 00000000 00000000 804a6542 00000042 803d7380 00000000 00000001 80450000
[ 1234.335802]    80430000 8043ae43 803d3a34 0000086b 804a379c 00000000 00000000 00000004
[ 1234.335802]    00000000 800a92a4 803d90a0 80430000 00000003 00000000 803d74ac 86b89a54
[ 1234.335802]    804a379c 800a7140 80430000 00000000 80439f50 80201800 00000000 00000000
[ 1234.335802]    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1234.335802]    ...
[ 1234.371822] Call Trace:
[ 1234.374290] [] show_stack+0x64/0xb0
[ 1234.378671] [] warn_slowpath_common+0xa0/0xd0
[ 1234.383928] [] warn_slowpath_null+0x18/0x24
[ 1234.389014] [] ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]
[ 1234.395403]
[ 1234.396903] ---[ end trace 0dabd211d3d954a5 ]---
[ 1234.401550] wlan0: failed to set key (4, ff:ff:ff:ff:ff:ff) to hardware (-22)
[ 1834.417579] ------------[ cut here ]------------
[ 1834.422314] WARNING: CPU: 0 PID: 2155 at compat-wireless-2016-10-08/drivers/net/wireless/ath/ath5k/mac80211-ops.c:500 ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]()
[ 1834.436999] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath5k ath pppox ppp_generic nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_recent xt_quota xt_policy xt_pkttype xt_physdev xt_owner xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iprange xt_id xt_hl xt_helper xt_esp xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_addrtype xt_TCPMSS xt_REDIRECT xt_NFQUEUE xt_NFLOG xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY ts_kmp ts_fsm ts_bm slhc nfnetlink_queue nfnetlink_log nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_rtsp nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast iptable_raw iptable_mangle iptable_filter ipt_ah ipt_ECN ip_tables crc7 crc_itu_t crc_ccitt compat br_netfilter sch_cake sch_teql em_nbyte sch_codel sch_prio sch_pie act_ipt sch_tbf sch_gred sch_dsmark cls_basic em_text em_meta sch_htb sch_sfq act_police sch_fq em_cmp sch_red act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress 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 ifb ip6_vti ip_vti sit ipcomp6 xfrm6_tunnel xfrm6_mode_tunnel xfrm6_mode_transport xfrm6_mode_beet esp6 ah6 ipcomp xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 ip6_tunnel tunnel6 tunnel4 ip_tunnel tun af_key xfrm_user xfrm_ipcomp xfrm_algo nls_utf8 nls_iso8859_15 nls_iso8859_1 vxlan udp_tunnel ip6_udp_tunnel sha512_generic sha256_generic sha1_generic seqiv jitterentropy_rng drbg md5 hmac ghash_generic gf128mul gcm echainiv des_generic deflate zlib_inflate zlib_deflate ctr cbc authenc mmc_block usb_storage mmc_core ohci_platform ohci_hcd ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache button_hotplug input_core usbcore nls_base usb_common crc16 cryptomgr aead crypto_null crc32c_generic crypto_hash
[ 1834.677481] CPU: 0 PID: 2155 Comm: hostapd Tainted: G        W       4.4.36 #0
[ 1834.684738] Stack : 00000000 00000000 804a6542 00000042 803d7380 00000000 00000001 80450000
[ 1834.684738]    80430000 8043ae43 803d3a34 0000086b 804a379c 00000000 00000000 00000005
[ 1834.684738]    00000000 800a92a4 803d90a0 80430000 00000003 00000000 803d74ac 86b89a54
[ 1834.684738]    804a379c 800a7140 80430000 00000000 80439f50 80201800 00000000 00000000
[ 1834.684738]    00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1834.684738]    ...
[ 1834.720749] Call Trace:
[ 1834.723226] [] show_stack+0x64/0xb0
[ 1834.727607] [] warn_slowpath_common+0xa0/0xd0
[ 1834.732863] [] warn_slowpath_null+0x18/0x24
[ 1834.737951] [] ath5k_sysfs_unregister+0x78c/0x3bb8 [ath5k]
[ 1834.744338]
[ 1834.745838] ---[ end trace 0dabd211d3d954a6 ]---
[ 1834.750476] wlan0: failed to set key (5, ff:ff:ff:ff:ff:ff) to hardware (-22)

-------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=334



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