[FS#3881] Kernel crash in wireless stack (mac80211/ath9k) (Attachment added)

[OpenWrt Bugs]

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

User who did this - Anna Tikhomirova (vampik) 

Attached to Project - OpenWrt/LEDE Project
Summary - Kernel crash in wireless stack (mac80211/ath9k)
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Critical
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details -  - Device problem occurs on
x86-64 KVM virtual machine with Qualcomm Atheros AR9462 Wireless Network Adapter (ath9k kernel driver)
 - Software versions of OpenWrt/LEDE release, packages, etc.
OpenWrt SNAPSHOT r16957-3d026d2425
 - Steps to reproduce
1) Enable Wi-Fi access point
2) Connect a Wi-Fi client to this access point
3) After a few seconds the crash occurs

I'm encountering kernel crashes after updating from OpenWrt SNAPSHOT r16915-bb749e49a6 to OpenWrt SNAPSHOT r16957-3d026d2425. The crash occurs a few seconds after a client is connected to Wi-Fi access point. The crash doesn't occur if Wi-Fi is disabled or if there is no clients connected to AP.
The system stops responding after the crash so I'm not able to provide the full crash log. I can only provide the screenshot of the virtual machine console after the crash which contains the last few lines (see the attached file).



One or more files have been attached.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3881

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