qcacld-3.0: Free the cached assoc request if a new assoc req rcvd

Driver caches the assoc request received from an SAE STA if it's
received before getting external auth(SAE) status from hostapd.
Station might retry the assoc frame(ex: if it doesn't get assoc
response within a specific interval) and the cached assoc request
is overwritten with new assoc request, but the cached assoc
request is not freed. Free the same to avoid memleaks.

Change-Id: I576f3b8b05d17afc66481419d1b5bdc0765c84aa
CRs-Fixed: 2535425

core/mac/src/pe/lim/lim_process_assoc_req_frame.c

@@ -1968,8 +1968,19 @@ static void lim_defer_sme_indication(struct mac_context *mac_ctx,
 				     struct sDphHashNode *sta_ds)
 {
 	struct tLimPreAuthNode *sta_pre_auth_ctx;
+	struct lim_assoc_data *cached_req;
+
 	/* Extract pre-auth context for the STA, if any. */
 	sta_pre_auth_ctx = lim_search_pre_auth_list(mac_ctx, hdr->sa);
+	if (sta_pre_auth_ctx->assoc_req.present) {
+		pe_debug("Free the cached assoc req as a new one is received");
+		cached_req = &sta_pre_auth_ctx->assoc_req;
+		lim_process_assoc_cleanup(mac_ctx, session,
+					  cached_req->assoc_req,
+					  cached_req->sta_ds,
+					  cached_req->assoc_req_copied);
+	}
+
 	sta_pre_auth_ctx->assoc_req.present = true;
 	sta_pre_auth_ctx->assoc_req.sub_type = sub_type;
 	qdf_mem_copy(&sta_pre_auth_ctx->assoc_req.hdr, hdr,

core/mac/src/pe/lim/lim_security_utils.c

@@ -314,6 +314,7 @@ void lim_release_pre_auth_node(struct mac_context *mac,
 		if (assoc->assocReqFrameLength)
 			qdf_mem_free(assoc->assocReqFrame);
 		qdf_mem_free(assoc);
+		pAuthNode->assoc_req.assoc_req = NULL;
 		pAuthNode->assoc_req.present = false;
 	}
 	MTRACE(mac_trace