Here are some batman-adv bugfixes:

- prevent hardif_put call with NULL parameter, by Colin Ian King - Avoid race in Translation Table allocator, by Sven Eckelmann - Fix Translation Table sync flags for intermediate Responses, by Linus Luessing - prevent sending inconsistent Translation Table TVLVs, by Marek Lindner -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEE1ilQI7G+y+fdhnrfoSvjmEKSnqEFAlsGpzQWHHN3QHNpbW9u d3VuZGVybGljaC5kZQAKCRChK+OYQpKeocg6D/420GIZ7fJf5xadOzw9XYDbU+tc nSz/N7V40BGit5i+bTo1fvQ9KRw4amUgx5nrTGi+nFmm0Au3cvwtFQe/c9JWZjFj /7LWsc/HJPjhS045qwbnwBNBrlEM0KbEwqibmKgfrwVf1uIlUueMuILOFrQtAMhE WokWK0mffxwPhwFlLxcByzqJSIUPB7BIoYnobU6orqjECdUVpUs3u4AF4Hbk28Y1 P3HS2WCK+Xgf1My7yjahh1pf1gM/AD0y+Xf+1k7dfM+n3qZrhdAPx30JmAIbcNWG T4uSarxXjio9RRV9Fy1DIggpi1oCCCGAlayTg6RwyYIv5qYB6L7dPrBlRx+gOtox QpLWIczvdMvloYFV5QykviErZRutFVBF2LKOEOI0GAGU/mCal2GNd+K1V504z+Gq PM/5SmuAPOmCXe1rf/72zpkFSspZ2h4xvPjYpdNRyBRg/QWHqz+JWMGeENtKoRYV v+3wYJTEa1bdeoc5NH7Fnc2iudeNlmISDuMxon1ikkgh5jHbaaC8Jvc6inp8y/JW hhvYd6A406H/N6WOn0FbbSuZc1DQFO/92Fib4N2zdOwBFY2adLTpjAayv/ePpMji SnGUdxoinWOUWpQo4S4SX4PXdE6F6ylNU4/Z2k9ixyQxNWO3T9wbKPaQGfLl8iSn P9wPkGr84R2tlXi21Q== =KY0V -----END PGP SIGNATURE----- Merge tag 'batadv-net-for-davem-20180524' of git://git.open-mesh.org/linux-merge Simon Wunderlich says: ==================== Here are some batman-adv bugfixes: - prevent hardif_put call with NULL parameter, by Colin Ian King - Avoid race in Translation Table allocator, by Sven Eckelmann - Fix Translation Table sync flags for intermediate Responses, by Linus Luessing - prevent sending inconsistent Translation Table TVLVs, by Marek Lindner ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-25 14:54:19 -04:00 · 2018-05-25 14:54:19 -04:00 · e3ffec48b2
commit e3ffec48b2
parent 1383cb8103 16116dac23
2 changed files with 68 additions and 18 deletions
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@ -1536,7 +1536,7 @@ out:

 	if (!ret && primary_if)
 		*primary_if = hard_iface;
-	else
+	else if (hard_iface)
 		batadv_hardif_put(hard_iface);

 	return ret;
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@ -862,7 +862,7 @@ batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
 	struct batadv_orig_node_vlan *vlan;
 	u8 *tt_change_ptr;

-	rcu_read_lock();
+	spin_lock_bh(&orig_node->vlan_list_lock);
 	hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
 		num_vlan++;
 		num_entries += atomic_read(&vlan->tt.num_entries);
@ -900,7 +900,7 @@ batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
 	*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;

 out:
-	rcu_read_unlock();
+	spin_unlock_bh(&orig_node->vlan_list_lock);
 	return tvlv_len;
 }

@ -931,15 +931,20 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
 	struct batadv_tvlv_tt_vlan_data *tt_vlan;
 	struct batadv_softif_vlan *vlan;
 	u16 num_vlan = 0;
-	u16 num_entries = 0;
+	u16 vlan_entries = 0;
+	u16 total_entries = 0;
 	u16 tvlv_len;
 	u8 *tt_change_ptr;
 	int change_offset;

-	rcu_read_lock();
+	spin_lock_bh(&bat_priv->softif_vlan_list_lock);
 	hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+		vlan_entries = atomic_read(&vlan->tt.num_entries);
+		if (vlan_entries < 1)
+			continue;
+
 		num_vlan++;
-		num_entries += atomic_read(&vlan->tt.num_entries);
+		total_entries += vlan_entries;
 	}

 	change_offset = sizeof(**tt_data);
@ -947,7 +952,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,

 	/* if tt_len is negative, allocate the space needed by the full table */
 	if (*tt_len < 0)
-		*tt_len = batadv_tt_len(num_entries);
+		*tt_len = batadv_tt_len(total_entries);

 	tvlv_len = *tt_len;
 	tvlv_len += change_offset;
@ -964,6 +969,10 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,

 	tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
 	hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+		vlan_entries = atomic_read(&vlan->tt.num_entries);
+		if (vlan_entries < 1)
+			continue;
+
 		tt_vlan->vid = htons(vlan->vid);
 		tt_vlan->crc = htonl(vlan->tt.crc);

@ -974,7 +983,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
 	*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;

 out:
-	rcu_read_unlock();
+	spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
 	return tvlv_len;
 }

@ -1538,6 +1547,8 @@ batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
 *  handled by a given originator
 * @entry: the TT global entry to check
 * @orig_node: the originator to search in the list
+ * @flags: a pointer to store TT flags for the given @entry received
+ *  from @orig_node
 *
 * find out if an orig_node is already in the list of a tt_global_entry.
 *
@ -1545,7 +1556,8 @@ batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry,
 */
 static bool
 batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
-				const struct batadv_orig_node *orig_node)
+				const struct batadv_orig_node *orig_node,
+				u8 *flags)
 {
 	struct batadv_tt_orig_list_entry *orig_entry;
 	bool found = false;
@ -1553,6 +1565,10 @@ batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
 	orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
 	if (orig_entry) {
 		found = true;
+
+		if (flags)
+			*flags = orig_entry->flags;
+
 		batadv_tt_orig_list_entry_put(orig_entry);
 	}

@ -1731,7 +1747,7 @@ static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
 			if (!(common->flags & BATADV_TT_CLIENT_TEMP))
 				goto out;
 			if (batadv_tt_global_entry_has_orig(tt_global_entry,
-							    orig_node))
+							    orig_node, NULL))
 				goto out_remove;
 			batadv_tt_global_del_orig_list(tt_global_entry);
 			goto add_orig_entry;
@ -2880,23 +2896,46 @@ unlock:
 }

 /**
- * batadv_tt_local_valid() - verify that given tt entry is a valid one
+ * batadv_tt_local_valid() - verify local tt entry and get flags
 * @entry_ptr: to be checked local tt entry
 * @data_ptr: not used but definition required to satisfy the callback prototype
+ * @flags: a pointer to store TT flags for this client to
+ *
+ * Checks the validity of the given local TT entry. If it is, then the provided
+ * flags pointer is updated.
 *
 * Return: true if the entry is a valid, false otherwise.
 */
-static bool batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
+static bool batadv_tt_local_valid(const void *entry_ptr,
+				  const void *data_ptr,
+				  u8 *flags)
 {
 	const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;

 	if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
 		return false;
+
+	if (flags)
+		*flags = tt_common_entry->flags;
+
 	return true;
 }

+/**
+ * batadv_tt_global_valid() - verify global tt entry and get flags
+ * @entry_ptr: to be checked global tt entry
+ * @data_ptr: an orig_node object (may be NULL)
+ * @flags: a pointer to store TT flags for this client to
+ *
+ * Checks the validity of the given global TT entry. If it is, then the provided
+ * flags pointer is updated either with the common (summed) TT flags if data_ptr
+ * is NULL or the specific, per originator TT flags otherwise.
+ *
+ * Return: true if the entry is a valid, false otherwise.
+ */
 static bool batadv_tt_global_valid(const void *entry_ptr,
-				   const void *data_ptr)
+				   const void *data_ptr,
+				   u8 *flags)
 {
 	const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
 	const struct batadv_tt_global_entry *tt_global_entry;
@ -2910,7 +2949,8 @@ static bool batadv_tt_global_valid(const void *entry_ptr,
 				       struct batadv_tt_global_entry,
 				       common);

-	return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node);
+	return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
+					       flags);
 }

 /**
@ -2920,25 +2960,34 @@ static bool batadv_tt_global_valid(const void *entry_ptr,
 * @hash: hash table containing the tt entries
 * @tt_len: expected tvlv tt data buffer length in number of bytes
 * @tvlv_buff: pointer to the buffer to fill with the TT data
- * @valid_cb: function to filter tt change entries
+ * @valid_cb: function to filter tt change entries and to return TT flags
 * @cb_data: data passed to the filter function as argument
+ *
+ * Fills the tvlv buff with the tt entries from the specified hash. If valid_cb
+ * is not provided then this becomes a no-op.
 */
 static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
 				    struct batadv_hashtable *hash,
 				    void *tvlv_buff, u16 tt_len,
 				    bool (*valid_cb)(const void *,
-						     const void *),
+						     const void *,
+						     u8 *flags),
 				    void *cb_data)
 {
 	struct batadv_tt_common_entry *tt_common_entry;
 	struct batadv_tvlv_tt_change *tt_change;
 	struct hlist_head *head;
 	u16 tt_tot, tt_num_entries = 0;
+	u8 flags;
+	bool ret;
 	u32 i;

 	tt_tot = batadv_tt_entries(tt_len);
 	tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;

+	if (!valid_cb)
+		return;
+
 	rcu_read_lock();
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
@ -2948,11 +2997,12 @@ static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
 			if (tt_tot == tt_num_entries)
 				break;

-			if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data)))
+			ret = valid_cb(tt_common_entry, cb_data, &flags);
+			if (!ret)
 				continue;

 			ether_addr_copy(tt_change->addr, tt_common_entry->addr);
-			tt_change->flags = tt_common_entry->flags;
+			tt_change->flags = flags;
 			tt_change->vid = htons(tt_common_entry->vid);
 			memset(tt_change->reserved, 0,
 			       sizeof(tt_change->reserved));