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When I originally introduced using the driver-indicated station as an optimisation to avoid the hashtable lookup/iteration, of course it wasn't intended to really functionally change anything. I neglected, however, to take into account VLAN interfaces, which have the property that management and data frames are handled differently: data frames go directly to the station and the VLAN while management frames continue to be processed over the underlying/associated AP-type interface. As a consequence, when a driver used this optimisation for management frames and the user enabled VLANs, my change broke things since any management frames, particularly disassoc/deauth, were missed by hostapd. Fix this by restoring the original code path for non-data frames, they aren't critical for performance to begin with. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=194713. Big thanks goes to Jarek who bisected the issue and provided a very detailed bug report, including the crucial information that he was using VLANs in his configuration. Cc: stable@vger.kernel.org Fixes: 771e846bea9e ("mac80211: allow passing transmitter station on RX") Reported-and-tested-by: Jarek Kamiński <jarek@freeside.be> Signed-off-by: Johannes Berg <johannes.berg@intel.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.