This is a note to let you know that I've just added the patch titled
batman-adv: fix reference counting imbalance while
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
batman-adv-fix-reference-counting-imbalance-while.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed May 28 21:03:54 PDT 2014
From: Antonio Quartulli <antonio@xxxxxxxxxxxxx>
Date: Wed, 23 Apr 2014 14:05:16 +0200
Subject: batman-adv: fix reference counting imbalance while
sending fragment
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Antonio Quartulli <antonio@xxxxxxxxxxxxx>
[ Upstream commit be181015a189cd141398b761ba4e79d33fe69949 ]
In the new fragmentation code the batadv_frag_send_packet()
function obtains a reference to the primary_if, but it does
not release it upon return.
This reference imbalance prevents the primary_if (and then
the related netdevice) to be properly released on shut down.
Fix this by releasing the primary_if in batadv_frag_send_packet().
Introduced by ee75ed88879af88558818a5c6609d85f60ff0df4
("batman-adv: Fragment and send skbs larger than mtu")
Cc: Martin Hundebøll <martin@xxxxxxxxxxxxx>
Signed-off-by: Antonio Quartulli <antonio@xxxxxxxxxxxxx>
Signed-off-by: Marek Lindner <mareklindner@xxxxxxxxxxxxx>
Acked-by: Martin Hundebøll <martin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/batman-adv/fragmentation.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -418,12 +418,13 @@ bool batadv_frag_send_packet(struct sk_b
struct batadv_neigh_node *neigh_node)
{
struct batadv_priv *bat_priv;
- struct batadv_hard_iface *primary_if;
+ struct batadv_hard_iface *primary_if = NULL;
struct batadv_frag_packet frag_header;
struct sk_buff *skb_fragment;
unsigned mtu = neigh_node->if_incoming->net_dev->mtu;
unsigned header_size = sizeof(frag_header);
unsigned max_fragment_size, max_packet_size;
+ bool ret = false;
/* To avoid merge and refragmentation at next-hops we never send
* fragments larger than BATADV_FRAG_MAX_FRAG_SIZE
@@ -483,7 +484,11 @@ bool batadv_frag_send_packet(struct sk_b
skb->len + ETH_HLEN);
batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
- return true;
+ ret = true;
+
out_err:
- return false;
+ if (primary_if)
+ batadv_hardif_free_ref(primary_if);
+
+ return ret;
}
Patches currently in stable-queue which might be from antonio@xxxxxxxxxxxxx are
queue-3.14/batman-adv-fix-reference-counting-imbalance-while.patch
queue-3.14/batman-adv-fix-neigh-reference-imbalance.patch
queue-3.14/batman-adv-fix-local-tt-check-for-outgoing-arp.patch
queue-3.14/batman-adv-increase-orig-refcount-when-storing-ref-in.patch
queue-3.14/batman-adv-fix-neigh_ifinfo-imbalance.patch
queue-3.14/batman-adv-fix-removing-neigh_ifinfo.patch
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