qcacld-3.0: Change local variables to dynamic in lim_process_auth_frame

Propagation from qcacld-2.0 to qcacld-3.0.

Change local variables to dynamic in lim_process_auth_frame as stack frame
over 1024 bytes may cause build failure in 32 bit platforms.

Change-Id: I83cf5ab24693e0ce012894d808ac79bf37fa9a08
CRs-Fixed: 2147286

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

@@ -1060,7 +1060,7 @@ lim_process_auth_frame(tpAniSirGlobal mac_ctx, uint8_t *rx_pkt_info,
 {
 	uint8_t *body_ptr, key_id, cfg_privacy_opt_imp;
 	uint8_t defaultkey[SIR_MAC_KEY_LENGTH];
-	uint8_t plainbody[LIM_ENCR_AUTH_BODY_LEN];
+	uint8_t *plainbody = NULL;
 	uint8_t decrypt_result;
 	uint16_t frame_len, curr_seq_num = 0;
 	uint32_t val, key_length = 8;
@@ -1127,6 +1127,13 @@ lim_process_auth_frame(tpAniSirGlobal mac_ctx, uint8_t *rx_pkt_info,
 		goto free;
 	}
 
+	plainbody = qdf_mem_malloc(LIM_ENCR_AUTH_BODY_LEN);
+	if (!plainbody) {
+		pe_err("failed to allocate memory for plainbody");
+		goto free;
+	}
+	qdf_mem_zero(plainbody, LIM_ENCR_AUTH_BODY_LEN);
+
 	/*
 	 * Determine if WEP bit is set in the FC or received MAC header
 	 * Note: WEP bit is set in FC of MAC header.
@@ -1403,6 +1410,8 @@ free:
 		qdf_mem_free(auth_frame);
 	if (rx_auth_frame)
 		qdf_mem_free(rx_auth_frame);
+	if (plainbody)
+		qdf_mem_free(plainbody);
 }
 
 /*----------------------------------------------------------------------