From: Abinaya Kalaiselvan <redacted>

commit 95f83ee8d857f006813755e89a126f1048b001e8 upstream.

"sband->iftype_data" is not assigned with any value for non HE supported
devices, which causes NULL pointer access during mesh peer connection
in those devices. Fix this by accessing the pointer after HE
capabilities condition check.

Cc: stable@vger.kernel.org
Fixes: 7f7aa94bcaf0 (mac80211: reduce peer HE MCS/NSS to own capabilities)
Signed-off-by: Abinaya Kalaiselvan <redacted>
Link: https://lore.kernel.org/r/1624459244-4497-1-git-send-email-akalaise@codeaurora.org (local)
Signed-off-by: Johannes Berg <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/mac80211/he.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/mac80211/he.c
+++ b/net/mac80211/he.c

@@ -111,7 +111,7 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct
 				  struct sta_info *sta)
 {
 	struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
-	struct ieee80211_sta_he_cap own_he_cap = sband->iftype_data->he_cap;
+	struct ieee80211_sta_he_cap own_he_cap;
 	struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
 	u8 he_ppe_size;
 	u8 mcs_nss_size;

@@ -123,6 +123,8 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct
 	if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
 		return;
 
+	own_he_cap = sband->iftype_data->he_cap;
+
 	/* Make sure size is OK */
 	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
 	he_ppe_size =