-From d72756b97529b3c6afa08933216aaa912bb16ce6 Mon Sep 17 00:00:00 2001
+From 746d6436f88899a79c1cb3b27af0614510368bb7 Mon Sep 17 00:00:00 2001
From: Marek Lindner <mareklindner@neomailbox.ch>
Date: Wed, 15 Jan 2014 20:31:18 +0800
-Subject: [PATCH] batman-adv: fix batman-adv header overhead calculation
+Subject: [PATCH 1/5] batman-adv: fix batman-adv header overhead calculation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Batman-adv prepends a full ethernet header in addition to its own
-header. This has to be reflected in the MTU calculation.
+header. This has to be reflected in the MTU calculation, especially
+since the value is used to set dev->hard_header_len.
Introduced by f1f310d5c261f0214f85afea95d5cd11d49d64c6
("batman-adv: consider network coding overhead when calculating required mtu")
/**
--
-1.8.4.4
+1.8.5.3
--- /dev/null
+From 41b38727749a94c1a65cf0f4be9bfe1cbaf0adeb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@web.de>
+Date: Mon, 20 Jan 2014 11:06:44 +0100
+Subject: [PATCH 2/5] batman-adv: fix potential kernel paging error for unicast
+ transmissions
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+batadv_send_skb_prepare_unicast(_4addr) might reallocate the skb's
+data. If it does then our ethhdr pointer is not valid anymore in
+batadv_send_skb_unicast(), resulting in a kernel paging error.
+
+Fixing this by refetching the ethhdr pointer after the potential
+reallocation.
+
+Introduced by b46c60b9e1ee7a1909c542413a85875a750955d6
+("batman-adv: improve unicast packet (re)routing")
+
+Signed-off-by: Linus Lüssing <linus.luessing@web.de>
+Acked-by: Antonio Quartulli <antonio@meshcoding.com>
+Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
+---
+ send.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/send.c b/send.c
+index b0a3d76..2035bd9 100644
+--- a/send.c
++++ b/send.c
+@@ -281,6 +281,10 @@ static int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
+ goto out;
+ }
+
++ /* skb->data might have been reallocated by
++ * batadv_send_skb_prepare_unicast{,_4addr}()
++ */
++ ethhdr = eth_hdr(skb);
+ unicast_packet = (struct batadv_unicast_packet *)skb->data;
+
+ /* inform the destination node that we are still missing a correct route
+--
+1.8.5.3
+
--- /dev/null
+From 2b108ccd0533e1375e44c73ec58c69dde9a71687 Mon Sep 17 00:00:00 2001
+From: Antonio Quartulli <antonio@meshcoding.com>
+Date: Tue, 21 Jan 2014 11:22:05 +0100
+Subject: [PATCH 3/5] batman-adv: fix soft-interface MTU computation
+
+The current MTU computation always returns a value
+smaller than 1500bytes even if the real interfaces
+have an MTU large enough to compensate the batman-adv
+overhead.
+
+Fix the computation by properly returning the highest
+admitted value.
+
+Introduced by f7f2fe494388fca828094a4ebdab918a7b2d64f8
+("batman-adv: limit local translation table max size")
+
+Reported-by: Russell Senior <russell@personaltelco.net>
+Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
+Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
+---
+ hard-interface.c | 22 ++++++++++++++--------
+ 1 file changed, 14 insertions(+), 8 deletions(-)
+
+diff --git a/hard-interface.c b/hard-interface.c
+index 6792e03..0eb0b3b 100644
+--- a/hard-interface.c
++++ b/hard-interface.c
+@@ -244,7 +244,7 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface)
+ {
+ struct batadv_priv *bat_priv = netdev_priv(soft_iface);
+ const struct batadv_hard_iface *hard_iface;
+- int min_mtu = ETH_DATA_LEN;
++ int min_mtu = INT_MAX;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
+@@ -259,8 +259,6 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface)
+ }
+ rcu_read_unlock();
+
+- atomic_set(&bat_priv->packet_size_max, min_mtu);
+-
+ if (atomic_read(&bat_priv->fragmentation) == 0)
+ goto out;
+
+@@ -271,13 +269,21 @@ int batadv_hardif_min_mtu(struct net_device *soft_iface)
+ min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE);
+ min_mtu -= sizeof(struct batadv_frag_packet);
+ min_mtu *= BATADV_FRAG_MAX_FRAGMENTS;
+- atomic_set(&bat_priv->packet_size_max, min_mtu);
+-
+- /* with fragmentation enabled we can fragment external packets easily */
+- min_mtu = min_t(int, min_mtu, ETH_DATA_LEN);
+
+ out:
+- return min_mtu - batadv_max_header_len();
++ /* report to the other components the maximum amount of bytes that
++ * batman-adv can send over the wire (without considering the payload
++ * overhead). For example, this value is used by TT to compute the
++ * maximum local table table size
++ */
++ atomic_set(&bat_priv->packet_size_max, min_mtu);
++
++ /* the real soft-interface MTU is computed by removing the payload
++ * overhead from the maximum amount of bytes that was just computed.
++ *
++ * However batman-adv does not support MTUs bigger than ETH_DATA_LEN
++ */
++ return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN);
+ }
+
+ /* adjusts the MTU if a new interface with a smaller MTU appeared. */
+--
+1.8.5.3
+
--- /dev/null
+From db13d361ff6abf57090acfdeb0f5cedd8dd7f02e Mon Sep 17 00:00:00 2001
+From: Antonio Quartulli <antonio@meshcoding.com>
+Date: Mon, 27 Jan 2014 12:23:28 +0100
+Subject: [PATCH 4/5] batman-adv: fix TT-TVLV parsing on OGM reception
+
+When accessing a TT-TVLV container in the OGM RX path
+the variable pointing to the list of changes to apply is
+altered by mistake.
+
+This makes the TT component read data at the wrong position
+in the OGM packet buffer.
+
+Fix it by removing the bogus pointer alteration.
+
+Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
+Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
+---
+ translation-table.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/translation-table.c b/translation-table.c
+index 3fca99d..45b6155 100644
+--- a/translation-table.c
++++ b/translation-table.c
+@@ -3204,7 +3204,6 @@ static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
+
+ spin_lock_bh(&orig_node->tt_lock);
+
+- tt_change = (struct batadv_tvlv_tt_change *)tt_buff;
+ batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
+ ttvn, tt_change);
+
+--
+1.8.5.3
+
--- /dev/null
+From dc08c045b46bdd9a5c81068a89f9f2a78d3d4bbd Mon Sep 17 00:00:00 2001
+From: Antonio Quartulli <antonio@meshcoding.com>
+Date: Tue, 28 Jan 2014 02:06:47 +0100
+Subject: [PATCH 5/5] batman-adv: release vlan object after checking the CRC
+
+There is a refcounter unbalance in the CRC checking routine
+invoked on OGM reception. A vlan object is retrieved (thus
+its refcounter is increased by one) but it is never properly
+released. This leads to a memleak because the vlan object
+will never be free'd.
+
+Fix this by releasing the vlan object after having read the
+CRC.
+
+Reported-by: Russell Senior <russell@personaltelco.net>
+Reported-by: Daniel <daniel@makrotopia.org>
+Reported-by: cmsv <cmsv@wirelesspt.net>
+Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
+Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
+---
+ translation-table.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/translation-table.c b/translation-table.c
+index 45b6155..05c2a9b 100644
+--- a/translation-table.c
++++ b/translation-table.c
+@@ -2248,6 +2248,7 @@ static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
+ {
+ struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
+ struct batadv_orig_node_vlan *vlan;
++ uint32_t crc;
+ int i;
+
+ /* check if each received CRC matches the locally stored one */
+@@ -2267,7 +2268,10 @@ static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
+ if (!vlan)
+ return false;
+
+- if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc))
++ crc = vlan->tt.crc;
++ batadv_orig_node_vlan_free_ref(vlan);
++
++ if (crc != ntohl(tt_vlan_tmp->crc))
+ return false;
+ }
+
+--
+1.8.5.3
+
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