4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Johannes Berg <[email protected]> commit f1f3e9e2a50a70de908f9dfe0d870e9cdc67e042 upstream. 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: abcff6ef01f9 ("mac80211: add VHT support for IBSS") Reported-by: Shaul Triebitz <[email protected]> Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/mac80211/ibss.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -66,6 +66,8 @@ ieee80211_ibss_build_presp(struct ieee80 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 2 + sizeof(struct ieee80211_ht_cap) + 2 + sizeof(struct ieee80211_ht_operation) + + 2 + sizeof(struct ieee80211_vht_cap) + + 2 + sizeof(struct ieee80211_vht_operation) + ifibss->ie_len; presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); if (!presp)
