mac80211: fix IBSS presp allocation size
When VHT IBSS support was added, the size of the extra elements wasn't considered in ieee80211_ibss_build_presp(), which makes it possible that it would overrun the allocated buffer. Fix it by allocating the necessary space. Fixes: abcff6ef ("mac80211: add VHT support for IBSS") Reported-by: Shaul Triebitz <shaul.triebitz@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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