qcacmn: Validate bonded chan ptr before dereferencing

In reg_get_5g_bonded_chan_array_for_freq, check if bonded channel
pointer is valid before dereferencing. This will help prevent potential
crash when the pointer is invalid. Also, add debug prints to allow
easier detection of issue.

Change-Id: I2891204101cd3b256ecc90d44f76c6fbb6d450b7
CRs-fixed: 2992744

umac/regulatory/core/src/reg_services_common.c

@@ -3365,6 +3365,11 @@ reg_get_5g_bonded_chan_array_for_freq(struct wlan_objmgr_pdev *pdev,
 	enum channel_state chan_state = CHANNEL_STATE_INVALID;
 	enum channel_state temp_chan_state;
 
+	if (!bonded_chan_ptr) {
+		reg_debug("bonded chan ptr is NULL");
+		return chan_state;
+	}
+
 	chan_cfreq =  bonded_chan_ptr->start_freq;
 	while (chan_cfreq <= bonded_chan_ptr->end_freq) {
 		temp_chan_state = reg_get_channel_state_for_freq(pdev,
@@ -3926,8 +3931,10 @@ reg_get_5g_bonded_channel_for_freq(struct wlan_objmgr_pdev *pdev,
 	/* Fetch the bonded_chan_ptr for width greater than 20MHZ. */
 	*bonded_chan_ptr_ptr = reg_get_bonded_chan_entry(freq, ch_width);
 
-	if (!(*bonded_chan_ptr_ptr))
+	if (!(*bonded_chan_ptr_ptr)) {
+		reg_debug_rl("bonded_chan_ptr_ptr is NULL");
 		return CHANNEL_STATE_INVALID;
+	}
 
 	return reg_get_5g_bonded_chan_array_for_freq(pdev, freq,
 						     *bonded_chan_ptr_ptr);