PKG_NAME:=batman-adv
PKG_VERSION:=2018.1
-PKG_RELEASE:=0
+PKG_RELEASE:=1
PKG_HASH:=b866b28dbbe5c9238abbdf5abbc30fc526dea56898ce4c1bd76d5c017843048b
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Wed, 9 May 2018 21:07:40 +0200
+Subject: [PATCH] batman-adv: Avoid race in TT TVLV allocator helper
+
+The functions batadv_tt_prepare_tvlv_local_data and
+batadv_tt_prepare_tvlv_global_data are responsible for preparing a buffer
+which can be used to store the TVLV container for TT and add the VLAN
+information to it.
+
+This will be done in three phases:
+
+1. count the number of VLANs and their entries
+2. allocate the buffer using the counters from the previous step and limits
+ from the caller (parameter tt_len)
+3. insert the VLAN information to the buffer
+
+The step 1 and 3 operate on a list which contains the VLANs. The access to
+these lists must be protected with an appropriate lock or otherwise they
+might operate on on different entries. This could for example happen when
+another context is adding VLAN entries to this list.
+
+This could lead to a buffer overflow in these functions when enough entries
+were added between step 1 and 3 to the VLAN lists that the buffer room for
+the entries (*tt_change) is smaller then the now required extra buffer for
+new VLAN entries.
+
+Fixes: 21a57f6e7a3b ("batman-adv: make the TT CRC logic VLAN specific")
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+Acked-by: Antonio Quartulli <a@unstable.cc>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/286be89a33497ba9000aa5c2960f1f4114953522
+---
+ net/batman-adv/translation-table.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
+index 0225616d5771d0986127322142fc591780fc25b0..7fa3a0a0524a1da63e92d081b443c302900bf0c3 100644
+--- 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;
+ }
+
+@@ -936,7 +936,7 @@ batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
+ 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) {
+ num_vlan++;
+ num_entries += atomic_read(&vlan->tt.num_entries);
+@@ -974,7 +974,7 @@ 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;
+ }
+
--- /dev/null
+From: Linus Lüssing <linus.luessing@c0d3.blue>
+Date: Thu, 10 May 2018 19:44:28 +0200
+Subject: [PATCH] batman-adv: Fix TT sync flags for intermediate TT responses
+
+The previous TT sync fix so far only fixed TT responses issued by the
+target node directly. So far, TT responses issued by intermediate nodes
+still lead to the wrong flags being added, leading to CRC mismatches.
+
+This behaviour was observed at Freifunk Hannover in a 800 nodes setup
+where a considerable amount of nodes were still infected with 'WI'
+TT flags even with (most) nodes having the previous TT sync fix applied.
+
+I was able to reproduce the issue with intermediate TT responses in a
+four node test setup and this patch fixes this issue by ensuring to
+use the per originator instead of the summarized, OR'd ones.
+
+Fixes: fa614fd04692 ("batman-adv: fix tt_global_entries flags update")
+Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/d65daee8617b29c1ddcc949ce3a5ec24f7a1e1af
+---
+ net/batman-adv/translation-table.c | 61 +++++++++++++++++++++++++-----
+ 1 file changed, 51 insertions(+), 10 deletions(-)
+
+diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
+index 7fa3a0a0524a1da63e92d081b443c302900bf0c3..23f9c212ab1e27be429645a85f7b5d6a02585de9 100644
+--- a/net/batman-adv/translation-table.c
++++ b/net/batman-adv/translation-table.c
+@@ -1538,6 +1538,8 @@ 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 +1547,8 @@ 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 +1556,10 @@ 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 +1738,7 @@ 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 +2887,46 @@ batadv_tt_req_node_new(struct batadv_priv *bat_priv,
+ }
+
+ /**
+- * 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 +2940,8 @@ 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 +2951,34 @@ 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 +2988,12 @@ 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));
--- /dev/null
+From: Marek Lindner <mareklindner@neomailbox.ch>
+Date: Sat, 12 May 2018 00:23:07 +0800
+Subject: [PATCH] batman-adv: prevent TT request storms by not sending inconsistent TT TLVLs
+
+A translation table TVLV changset sent with an OGM consists
+of a number of headers (one per VLAN) plus the changeset
+itself (addition and/or deletion of entries).
+
+The per-VLAN headers are used by OGM recipients for consistency
+checks. Said consistency check might determine that a full
+translation table request is needed to restore consistency. If
+the TT sender adds per-VLAN headers of empty VLANs into the OGM,
+recipients are led to believe to have reached an inconsistent
+state and thus request a full table update. The full table does
+not contain empty VLANs (due to missing entries) the cycle
+restarts when the next OGM is issued.
+
+Consequently, when the translation table TVLV headers are
+composed, empty VLANs are to be excluded.
+
+Fixes: 21a57f6e7a3b ("batman-adv: make the TT CRC logic VLAN specific")
+Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/e4687b4be274da6180fc15b327419851fb681ec9
+---
+ net/batman-adv/translation-table.c | 15 ++++++++++++---
+ 1 file changed, 12 insertions(+), 3 deletions(-)
+
+diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
+index 23f9c212ab1e27be429645a85f7b5d6a02585de9..3986551397caa5ffb6ba7338eeb4769c8b8f99fb 100644
+--- a/net/batman-adv/translation-table.c
++++ b/net/batman-adv/translation-table.c
+@@ -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;
+
+ 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);
+
--- /dev/null
+From: Antonio Quartulli <a@unstable.cc>
+Date: Sat, 12 May 2018 03:02:44 +0800
+Subject: [PATCH] batman-adv: don't implement skb_postpush_rcsum() for linux >=4.4.47
+
+skb_postpush_rcsum() has been implemented in 4.4.47 therefore
+our compat code has to be changed to prevent this function to
+be implemented when using those kernels.
+
+Signed-off-by: Antonio Quartulli <a@unstable.cc>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/b4693d107e0869bf11956fd2d3be4fd0a8671b46
+---
+ compat-include/linux/skbuff.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/compat-include/linux/skbuff.h b/compat-include/linux/skbuff.h
+index 6f73946496ac15f2fdb856357f16e4e2d8a6e6cd..371bb561eecaf605a5c96f9417546f6bb817724d 100644
+--- a/compat-include/linux/skbuff.h
++++ b/compat-include/linux/skbuff.h
+@@ -77,7 +77,7 @@ struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb,
+
+ #endif /* < KERNEL_VERSION(4, 2, 0) */
+
+-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 47)
+
+ static inline void skb_postpush_rcsum(struct sk_buff *skb,
+ const void *start, unsigned int len)
--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Sat, 2 Jun 2018 17:26:34 +0200
+Subject: [PATCH] batman-adv: Fix bat_ogm_iv best gw refcnt after netlink dump
+
+A reference for the best gateway is taken when the list of gateways in the
+mesh is sent via netlink. This is necessary to check whether the currently
+dumped entry is the currently selected gateway or not. This information is
+then transferred as flag BATADV_ATTR_FLAG_BEST.
+
+After the comparison of the current entry is done,
+batadv_iv_gw_dump_entry() has to decrease the reference counter again.
+Otherwise the reference will be held and thus prevents a proper shutdown of
+the batman-adv interfaces (and some of the interfaces enslaved in it).
+
+Fixes: fa3228924152 ("batman-adv: add B.A.T.M.A.N. IV bat_gw_dump implementations")
+Reported-by: Andreas Ziegler <dev@andreas-ziegler.de>
+Tested-by: Andreas Ziegler <dev@andreas-ziegler.de>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+Acked-by: Marek Lindner <mareklindner@neomailbox.ch>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/46360d203c627e71a27d1f8f551c819c7f2353fd
+---
+ net/batman-adv/bat_iv_ogm.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
+index be09a98838252f4f0c23cec0625930cf896cd0ff..73bf6a93a3cf1141a34657bf1284893199e04db9 100644
+--- a/net/batman-adv/bat_iv_ogm.c
++++ b/net/batman-adv/bat_iv_ogm.c
+@@ -2732,7 +2732,7 @@ static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
+ {
+ struct batadv_neigh_ifinfo *router_ifinfo = NULL;
+ struct batadv_neigh_node *router;
+- struct batadv_gw_node *curr_gw;
++ struct batadv_gw_node *curr_gw = NULL;
+ int ret = 0;
+ void *hdr;
+
+@@ -2780,6 +2780,8 @@ static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
+ ret = 0;
+
+ out:
++ if (curr_gw)
++ batadv_gw_node_put(curr_gw);
+ if (router_ifinfo)
+ batadv_neigh_ifinfo_put(router_ifinfo);
+ if (router)
--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Sat, 2 Jun 2018 17:26:35 +0200
+Subject: [PATCH] batman-adv: Fix bat_v best gw refcnt after netlink dump
+
+A reference for the best gateway is taken when the list of gateways in the
+mesh is sent via netlink. This is necessary to check whether the currently
+dumped entry is the currently selected gateway or not. This information is
+then transferred as flag BATADV_ATTR_FLAG_BEST.
+
+After the comparison of the current entry is done,
+batadv_v_gw_dump_entry() has to decrease the reference counter again.
+Otherwise the reference will be held and thus prevents a proper shutdown of
+the batman-adv interfaces (and some of the interfaces enslaved in it).
+
+Fixes: 15315a94ad98 ("batman-adv: add B.A.T.M.A.N. V bat_gw_dump implementations")
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+Acked-by: Marek Lindner <mareklindner@neomailbox.ch>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/2b422b5808183d1084b450b89d9a085a13dd6d2c
+---
+ net/batman-adv/bat_v.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c
+index ec93337ee2597738e46b87dd72724d5becf3f48e..6baec4e68898c6e992e7522d2ee8c78ce62a1b08 100644
+--- a/net/batman-adv/bat_v.c
++++ b/net/batman-adv/bat_v.c
+@@ -927,7 +927,7 @@ static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
+ {
+ struct batadv_neigh_ifinfo *router_ifinfo = NULL;
+ struct batadv_neigh_node *router;
+- struct batadv_gw_node *curr_gw;
++ struct batadv_gw_node *curr_gw = NULL;
+ int ret = 0;
+ void *hdr;
+
+@@ -995,6 +995,8 @@ static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
+ ret = 0;
+
+ out:
++ if (curr_gw)
++ batadv_gw_node_put(curr_gw);
+ if (router_ifinfo)
+ batadv_neigh_ifinfo_put(router_ifinfo);
+ if (router)
--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Fri, 1 Jun 2018 19:24:23 +0200
+Subject: [PATCH] batman-adv: Fix debugfs path for renamed hardif
+
+batman-adv is creating special debugfs directories in the init
+net_namespace for each valid hard-interface (net_device). But it is
+possible to rename a net_device to a completely different name then the
+original one.
+
+It can therefore happen that a user registers a new net_device which gets
+the name "wlan0" assigned by default. batman-adv is also adding a new
+directory under $debugfs/batman-adv/ with the name "wlan0".
+
+The user then decides to rename this device to "wl_pri" and registers a
+different device. The kernel may now decide to use the name "wlan0" again
+for this new device. batman-adv will detect it as a valid net_device and
+tries to create a directory with the name "wlan0" under
+$debugfs/batman-adv/. But there already exists one with this name under
+this path and thus this fails. batman-adv will detect a problem and
+rollback the registering of this device.
+
+batman-adv must therefore take care of renaming the debugfs directories
+for hard-interfaces whenever it detects such a net_device rename.
+
+Fixes: 3c926a01c8e8 ("batman-adv: add debugfs structure for information per interface")
+Reported-by: John Soros <sorosj@gmail.com>
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/127086f503f6495518b95455efebee33d328f335
+---
+ net/batman-adv/debugfs.c | 20 ++++++++++++++++++++
+ net/batman-adv/debugfs.h | 6 ++++++
+ net/batman-adv/hard-interface.c | 3 +++
+ 3 files changed, 29 insertions(+)
+
+diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c
+index 4229b01ac7b54008e023df0ed6546a6d541498ba..7e5de7b9f6d53b846cebfa95bf694a20c640b2d6 100644
+--- a/net/batman-adv/debugfs.c
++++ b/net/batman-adv/debugfs.c
+@@ -19,6 +19,7 @@
+ #include "debugfs.h"
+ #include "main.h"
+
++#include <linux/dcache.h>
+ #include <linux/debugfs.h>
+ #include <linux/err.h>
+ #include <linux/errno.h>
+@@ -343,6 +344,25 @@ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
+ return -ENOMEM;
+ }
+
++/**
++ * batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif
++ * @hard_iface: hard interface which was renamed
++ */
++void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
++{
++ const char *name = hard_iface->net_dev->name;
++ struct dentry *dir;
++ struct dentry *d;
++
++ dir = hard_iface->debug_dir;
++ if (!dir)
++ return;
++
++ d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
++ if (!d)
++ pr_err("Can't rename debugfs dir to %s\n", name);
++}
++
+ /**
+ * batadv_debugfs_del_hardif() - delete the base directory for a hard interface
+ * in debugfs.
+diff --git a/net/batman-adv/debugfs.h b/net/batman-adv/debugfs.h
+index 37b069698b04b369e68e4e8a31c3ac01575b0178..8538a7a75e937f50f8efdbf2fe879b4ac8dafadb 100644
+--- a/net/batman-adv/debugfs.h
++++ b/net/batman-adv/debugfs.h
+@@ -32,6 +32,7 @@ void batadv_debugfs_destroy(void);
+ int batadv_debugfs_add_meshif(struct net_device *dev);
+ void batadv_debugfs_del_meshif(struct net_device *dev);
+ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
++void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
+ void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface);
+
+ #else
+@@ -59,6 +60,11 @@ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
+ return 0;
+ }
+
++static inline
++void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
++{
++}
++
+ static inline
+ void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
+ {
+diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
+index c405d15befd60bdabf9f50813c3bee446238d539..dc2763b1110727cc5dee62d555dd7c7b50f3b463 100644
+--- a/net/batman-adv/hard-interface.c
++++ b/net/batman-adv/hard-interface.c
+@@ -1051,6 +1051,9 @@ static int batadv_hard_if_event(struct notifier_block *this,
+ if (batadv_is_wifi_hardif(hard_iface))
+ hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
+ break;
++ case NETDEV_CHANGENAME:
++ batadv_debugfs_rename_hardif(hard_iface);
++ break;
+ default:
+ break;
+ }
--- /dev/null
+From: Sven Eckelmann <sven@narfation.org>
+Date: Fri, 1 Jun 2018 19:24:24 +0200
+Subject: [PATCH] batman-adv: Fix debugfs path for renamed softif
+
+batman-adv is creating special debugfs directories in the init
+net_namespace for each created soft-interface (batadv net_device). But it
+is possible to rename a net_device to a completely different name then the
+original one.
+
+It can therefore happen that a user registers a new batadv net_device with
+the name "bat0". batman-adv is then also adding a new directory under
+$debugfs/batman-adv/ with the name "wlan0".
+
+The user then decides to rename this device to "bat1" and registers a
+different batadv device with the name "bat0". batman-adv will then try to
+create a directory with the name "bat0" under $debugfs/batman-adv/ again.
+But there already exists one with this name under this path and thus this
+fails. batman-adv will detect a problem and rollback the registering of
+this device.
+
+batman-adv must therefore take care of renaming the debugfs directories for
+soft-interfaces whenever it detects such a net_device rename.
+
+Fixes: 230202d4b530 ("batman-adv: Move device for icmp injection to debugfs")
+Signed-off-by: Sven Eckelmann <sven@narfation.org>
+
+Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/3f2237bb191cd17654a4d5a5badfd6e7379c4b37
+---
+ net/batman-adv/debugfs.c | 20 +++++++++++++++++++
+ net/batman-adv/debugfs.h | 5 +++++
+ net/batman-adv/hard-interface.c | 34 +++++++++++++++++++++++++++------
+ 3 files changed, 53 insertions(+), 6 deletions(-)
+
+diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c
+index 7e5de7b9f6d53b846cebfa95bf694a20c640b2d6..87479c60670ebfbe2ad3df17130f1289d657df7b 100644
+--- a/net/batman-adv/debugfs.c
++++ b/net/batman-adv/debugfs.c
+@@ -433,6 +433,26 @@ int batadv_debugfs_add_meshif(struct net_device *dev)
+ return -ENOMEM;
+ }
+
++/**
++ * batadv_debugfs_rename_meshif() - Fix debugfs path for renamed softif
++ * @dev: net_device which was renamed
++ */
++void batadv_debugfs_rename_meshif(struct net_device *dev)
++{
++ struct batadv_priv *bat_priv = netdev_priv(dev);
++ const char *name = dev->name;
++ struct dentry *dir;
++ struct dentry *d;
++
++ dir = bat_priv->debug_dir;
++ if (!dir)
++ return;
++
++ d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
++ if (!d)
++ pr_err("Can't rename debugfs dir to %s\n", name);
++}
++
+ /**
+ * batadv_debugfs_del_meshif() - Remove interface dependent debugfs entries
+ * @dev: netdev struct of the soft interface
+diff --git a/net/batman-adv/debugfs.h b/net/batman-adv/debugfs.h
+index 8538a7a75e937f50f8efdbf2fe879b4ac8dafadb..08a592ffbee5203ac4994fc49bf9c187c2e66f8e 100644
+--- a/net/batman-adv/debugfs.h
++++ b/net/batman-adv/debugfs.h
+@@ -30,6 +30,7 @@ struct net_device;
+ void batadv_debugfs_init(void);
+ void batadv_debugfs_destroy(void);
+ int batadv_debugfs_add_meshif(struct net_device *dev);
++void batadv_debugfs_rename_meshif(struct net_device *dev);
+ void batadv_debugfs_del_meshif(struct net_device *dev);
+ int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
+ void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
+@@ -50,6 +51,10 @@ static inline int batadv_debugfs_add_meshif(struct net_device *dev)
+ return 0;
+ }
+
++static inline void batadv_debugfs_rename_meshif(struct net_device *dev)
++{
++}
++
+ static inline void batadv_debugfs_del_meshif(struct net_device *dev)
+ {
+ }
+diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
+index dc2763b1110727cc5dee62d555dd7c7b50f3b463..2f0d42f2f913e74cf10c0c6ce89320434994cac5 100644
+--- a/net/batman-adv/hard-interface.c
++++ b/net/batman-adv/hard-interface.c
+@@ -989,6 +989,32 @@ void batadv_hardif_remove_interfaces(void)
+ rtnl_unlock();
+ }
+
++/**
++ * batadv_hard_if_event_softif() - Handle events for soft interfaces
++ * @event: NETDEV_* event to handle
++ * @net_dev: net_device which generated an event
++ *
++ * Return: NOTIFY_* result
++ */
++static int batadv_hard_if_event_softif(unsigned long event,
++ struct net_device *net_dev)
++{
++ struct batadv_priv *bat_priv;
++
++ switch (event) {
++ case NETDEV_REGISTER:
++ batadv_sysfs_add_meshif(net_dev);
++ bat_priv = netdev_priv(net_dev);
++ batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
++ break;
++ case NETDEV_CHANGENAME:
++ batadv_debugfs_rename_meshif(net_dev);
++ break;
++ }
++
++ return NOTIFY_DONE;
++}
++
+ static int batadv_hard_if_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+ {
+@@ -997,12 +1023,8 @@ static int batadv_hard_if_event(struct notifier_block *this,
+ struct batadv_hard_iface *primary_if = NULL;
+ struct batadv_priv *bat_priv;
+
+- if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) {
+- batadv_sysfs_add_meshif(net_dev);
+- bat_priv = netdev_priv(net_dev);
+- batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
+- return NOTIFY_DONE;
+- }
++ if (batadv_softif_is_valid(net_dev))
++ return batadv_hard_if_event_softif(event, net_dev);
+
+ hard_iface = batadv_hardif_get_by_netdev(net_dev);
+ if (!hard_iface && (event == NETDEV_REGISTER ||
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