mac80211: mesh: fix HE operation element length check
The length check here was bad, if the length doesn't at least include the length of the fixed part, we cannot call ieee80211_he_oper_size() to determine the total. Fix this, and convert to cfg80211_find_ext_elem() while at it. Cc: stable@vger.kernel.org Fixes: 70debba3 ("mac80211: save HE oper info in BSS config for mesh") Link: https://lore.kernel.org/r/20210930131120.b0f940976c56.I954e1be55e9f87cc303165bff5c906afe1e54648@changeid Signed-off-by:Johannes Berg <johannes.berg@intel.com>
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ca6e11c3