brcmfmac: fix bug in setting mgmt ie and parsing vndrs ie.

Parsing vndrs ie was not taking len of tlv itself in account. Setting
mgmt ie was missing check for length indicating non configured ie and
wrongly checking available length.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c

@@ -3293,11 +3293,12 @@ brcmf_parse_vndr_ies(const u8 *vndr_ie_buf, u32 vndr_ie_len,
 		if (vndr_ies->count >= MAX_VNDR_IE_NUMBER)
 			break;
 next:
-		remaining_len -= ie->len;
-		if (remaining_len <= 2)
+		remaining_len -= (ie->len + TLV_HDR_LEN);
+		if (remaining_len <= TLV_HDR_LEN)
 			ie = NULL;
 		else
-			ie = (struct brcmf_tlv *)(((u8 *)ie) + ie->len);
+			ie = (struct brcmf_tlv *)(((u8 *)ie) + ie->len +
+				TLV_HDR_LEN);
 	}
 	return err;
 }
@@ -3396,11 +3397,11 @@ s32 brcmf_vif_set_mgmt_ie(struct brcmf_cfg80211_vif *vif, s32 pktflag,
 		}
 	}
 
-	if (mgmt_ie_buf != NULL) {
+	if (mgmt_ie_buf && *mgmt_ie_len) {
 		if (parsed_ie_buf_len && (parsed_ie_buf_len == *mgmt_ie_len) &&
 		    (memcmp(mgmt_ie_buf, curr_ie_buf,
 			    parsed_ie_buf_len) == 0)) {
-			WL_TRACE("Previous mgmt IE is equals to current IE");
+			WL_TRACE("Previous mgmt IE equals to current IE\n");
 			goto exit;
 		}
 
@@ -3438,6 +3439,16 @@ s32 brcmf_vif_set_mgmt_ie(struct brcmf_cfg80211_vif *vif, s32 pktflag,
 		for (i = 0; i < new_vndr_ies.count; i++) {
 			vndrie_info = &new_vndr_ies.ie_info[i];
 
+			/* verify remained buf size before copy data */
+			if (remained_buf_len < (vndrie_info->vndrie.len +
+							VNDR_IE_VSIE_OFFSET)) {
+				WL_ERR("no space in mgmt_ie_buf: len left %d",
+				       remained_buf_len);
+				break;
+			}
+			remained_buf_len -= (vndrie_info->ie_len +
+					     VNDR_IE_VSIE_OFFSET);
+
 			WL_TRACE("ADDED ID : %d, Len: %d, OUI:%02x:%02x:%02x\n",
 				 vndrie_info->vndrie.id,
 				 vndrie_info->vndrie.len,
@@ -3449,13 +3460,6 @@ s32 brcmf_vif_set_mgmt_ie(struct brcmf_cfg80211_vif *vif, s32 pktflag,
 							   vndrie_info->ie_ptr,
 							   vndrie_info->ie_len,
 							   "add");
-			/* verify remained buf size before copy data */
-			remained_buf_len -= vndrie_info->ie_len;
-			if (remained_buf_len < 0) {
-				WL_ERR("no space in mgmt_ie_buf: len left %d",
-					remained_buf_len);
-				break;
-			}
 
 			/* save the parsed IE in wl struct */
 			memcpy(ptr + (*mgmt_ie_len), vndrie_info->ie_ptr,