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[Bug 1301558] Re: [ath9k_htc] 14.04 NetworkManager hangs after 'ath: phy0: Unable to remove station entry for...'

 

Rebuilt 3.14 with some additional debugging enabled and triggered it
again today while simply wgetting an iso. Results in some new messages
that are kind of interesting:

[ 3501.052975] usb 1-2: ath: firmware panic! exccause: 0x0000000d; pc: 0x0090a641; badvaddr: 0x12345678.
[ 3517.088168] wlan0: moving STA f4:ec:38:ec:42:02 to state 3
[ 3517.088180] wlan0: moving STA f4:ec:38:ec:42:02 to state 2
[ 3519.088060] ath: phy0: Unable to remove station entry for: f4:ec:38:ec:42:02
[ 3519.088078] wlan0: moving STA f4:ec:38:ec:42:02 to state 1
[ 3519.088084] wlan0: Removed STA f4:ec:38:ec:42:02
[ 3519.088240] wlan0: Destroyed STA f4:ec:38:ec:42:02

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https://bugs.launchpad.net/bugs/1301558

Title:
  [ath9k_htc] 14.04 NetworkManager hangs after 'ath: phy0: Unable to
  remove station entry for...'

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  This problem has been happening randomly since I installed 14.04.
  Today it happened twice while trying to zsync the latest iso.

  I use a TP-Link TL-WN821N wireless adapter to connect to the internet,
  which uses the ath9k_htc module. NetworkManager occasionally locks up
  to the point where any commands I try to kill it or restart it hang as
  well, and my only way out is REISUB. Right before it happens I have
  noticed twice in my dmesg:

  [  494.896048] ath: phy0: Unable to remove station entry for:
  f4:ec:38:ec:42:02 For reference that mac address is the default router
  I connect to daily.

  and then shortly after we get a kernel dump for NetworkManager:

  [  720.752078] INFO: task NetworkManager:850 blocked for more than 120 seconds.
  [  720.752090]       Not tainted 3.13.0-21-generic #43-Ubuntu
  [  720.752095] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [  720.752100] NetworkManager  D ffff88011fd14440     0   850      1 0x00000000
  [  720.752110]  ffff8800cd3bd8d0 0000000000000002 ffff8800df0a5fc0 ffff8800cd3bdfd8
  [  720.752119]  0000000000014440 0000000000014440 ffff8800df0a5fc0 ffff8800cedfe8d8
  [  720.752127]  ffff8800cedfe8dc ffff8800df0a5fc0 00000000ffffffff ffff8800cedfe8e0
  [  720.752135] Call Trace:
  [  720.752150]  [<ffffffff81719259>] schedule_preempt_disabled+0x29/0x70
  [  720.752159]  [<ffffffff8171b0c5>] __mutex_lock_slowpath+0x135/0x1b0
  [  720.752167]  [<ffffffff8171b15f>] mutex_lock+0x1f/0x2f
  [  720.752224]  [<ffffffffa0355e5d>] nl80211_dump_scan+0x5d/0x630 [cfg80211]
  [  720.752233]  [<ffffffff8160a4a1>] ? __kmalloc_reserve.isra.25+0x31/0x90
  [  720.752243]  [<ffffffff816476fe>] genl_lock_dumpit+0x2e/0x50
  [  720.752249]  [<ffffffff81644954>] netlink_dump+0x84/0x240
  [  720.752256]  [<ffffffff8164523b>] __netlink_dump_start+0x1ab/0x220
  [  720.752264]  [<ffffffff81649166>] genl_family_rcv_msg+0x276/0x370
  [  720.752271]  [<ffffffff8160b0be>] ? __alloc_skb+0x4e/0x2b0
  [  720.752278]  [<ffffffff816476d0>] ? genl_lock_done+0x50/0x50
  [  720.752284]  [<ffffffff81647680>] ? genl_unlock+0x20/0x20
  [  720.752295]  [<ffffffff811a2608>] ? __kmalloc_node_track_caller+0x58/0x1e0
  [  720.752302]  [<ffffffff81649260>] ? genl_family_rcv_msg+0x370/0x370
  [  720.752309]  [<ffffffff816492f1>] genl_rcv_msg+0x91/0xd0
  [  720.752316]  [<ffffffff81647379>] netlink_rcv_skb+0xa9/0xc0
  [  720.752322]  [<ffffffff81647878>] genl_rcv+0x28/0x40
  [  720.752329]  [<ffffffff816469a5>] netlink_unicast+0xd5/0x1b0
  [  720.752336]  [<ffffffff81646d7f>] netlink_sendmsg+0x2ff/0x740
  [  720.752343]  [<ffffffff81644cb2>] ? netlink_recvmsg+0x1a2/0x3a0
  [  720.752351]  [<ffffffff81601f3b>] sock_sendmsg+0x8b/0xc0
  [  720.752359]  [<ffffffff81601c2e>] ? move_addr_to_kernel.part.16+0x1e/0x60
  [  720.752366]  [<ffffffff816027e1>] ? move_addr_to_kernel+0x21/0x30
  [  720.752373]  [<ffffffff816027a9>] ___sys_sendmsg+0x3a9/0x3c0
  [  720.752382]  [<ffffffff811cd000>] ? poll_select_copy_remaining+0x130/0x130
  [  720.752390]  [<ffffffff811cd000>] ? poll_select_copy_remaining+0x130/0x130
  [  720.752399]  [<ffffffff8101b763>] ? native_sched_clock+0x13/0x80
  [  720.752406]  [<ffffffff8101b763>] ? native_sched_clock+0x13/0x80
  [  720.752413]  [<ffffffff8109d12d>] ? sched_clock_local+0x1d/0x80
  [  720.752423]  [<ffffffff811112cc>] ? acct_account_cputime+0x1c/0x20
  [  720.752429]  [<ffffffff8109d75b>] ? account_user_time+0x8b/0xa0
  [  720.752437]  [<ffffffff81602eb2>] __sys_sendmsg+0x42/0x80
  [  720.752444]  [<ffffffff81602f02>] SyS_sendmsg+0x12/0x20
  [  720.752452]  [<ffffffff817254ff>] tracesys+0xe1/0xe6

  I don't know how to reproduce it, but it happened once on March 28
  when I installed and three times on April 2 in a short period of time.
  I will attach the dmesg I took before the last REISUB to the bug.
  Please let me know if any more information is useful, I'll try to get
  it next time it happens.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-21-generic 3.13.0-21.43
  ProcVersionSignature: Ubuntu 3.13.0-21.43-generic 3.13.8
  Uname: Linux 3.13.0-21-generic x86_64
  ApportVersion: 2.14-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC3:  jconti     2024 F.... pulseaudio
   /dev/snd/controlC0:  jconti     2024 F.... pulseaudio
   /dev/snd/controlC2:  jconti     2024 F.... pulseaudio
   /dev/snd/controlC1:  jconti     2024 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Apr  2 14:53:42 2014
  HibernationDevice: RESUME=UUID=f62b1259-1f84-4a06-9c97-90a5eb41cfd4
  InstallationDate: Installed on 2014-03-28 (5 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140328)
  MachineType: HP Pavilion 061 RC658AA-ABA a1630n
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-21-generic root=UUID=863ed135-24c6-4cf5-b1b8-b4e76181f621 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-21-generic N/A
   linux-backports-modules-3.13.0-21-generic  N/A
   linux-firmware                             1.127
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/02/2006
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 3.07
  dmi.board.name: NODUSM3
  dmi.board.vendor: ASUSTek Computer INC.
  dmi.board.version: 1.05
  dmi.chassis.type: 3
  dmi.chassis.version: 1111
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr3.07:bd08/02/2006:svnHPPavilion061:pnRC658AA-ABAa1630n:pvr0nx1114RE101NODM300:rvnASUSTekComputerINC.:rnNODUSM3:rvr1.05:cvn:ct3:cvr1111:
  dmi.product.name: RC658AA-ABA a1630n
  dmi.product.version: 0nx1114RE101NODM300
  dmi.sys.vendor: HP Pavilion 061

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