mac80211: fix rx->key NULL dereference during mic failure
Sometimes when reporting a MIC failure rx->key may be unset. This code path is hit when receiving a packet meant for a multicast address, and decryption is performed in HW. Fortunately, the failing key_idx is not used for anything up to (and including) usermode, so we allow ourselves to drop it on the way up when a key cannot be retrieved. Signed-off-by: NArik Nemtsov <arik@wizery.com> Cc: stable@kernel.org Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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