wifi: cfg80211: hold wiphy mutex for send_interface
Given all the locking rework in mac80211, we pretty much need to get into the driver with the wiphy mutex held in all callbacks. This is already mostly the case, but as Johan reported, in the get_txpower it may not be true. Lock the wiphy mutex around nl80211_send_iface(), then is also around callers of nl80211_notify_iface(). This is easy to do, fixes the problem, and aligns the locking between various calls to it in different parts of the code of cfg80211. Fixes: 0e8185ce ("wifi: mac80211: check wiphy mutex in ops") Reported-by:Johan Hovold <johan@kernel.org> Closes: https://lore.kernel.org/r/ZVOXX6qg4vXEx8dX@hovoldconsulting.com Tested-by:
Johan Hovold <johan+linaro@kernel.org> Signed-off-by:
Johannes Berg <johannes.berg@intel.com>
parent
8e2f6f23
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