This is a note to let you know that I've just added the patch titled
ipv4 igmp: use in_dev_put in timer handlers instead of __in_dev_put
to the 3.4-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:
ipv4-igmp-use-in_dev_put-in-timer-handlers-instead-of-__in_dev_put.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 81499d0a7aba3d7e5a10e1dfa8ba603e43012cdf Mon Sep 17 00:00:00 2001
From: Salam Noureddine <noureddine@xxxxxxxxxxxxxxxxxx>
Date: Sun, 29 Sep 2013 13:39:42 -0700
Subject: ipv4 igmp: use in_dev_put in timer handlers instead of __in_dev_put
From: Salam Noureddine <noureddine@xxxxxxxxxxxxxxxxxx>
[ Upstream commit e2401654dd0f5f3fb7a8d80dad9554d73d7ca394 ]
It is possible for the timer handlers to run after the call to
ip_mc_down so use in_dev_put instead of __in_dev_put in the handler
function in order to do proper cleanup when the refcnt reaches 0.
Otherwise, the refcnt can reach zero without the in_device being
destroyed and we end up leaking a reference to the net_device and
see messages like the following,
unregister_netdevice: waiting for eth0 to become free. Usage count = 1
Tested on linux-3.4.43.
Signed-off-by: Salam Noureddine <noureddine@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/igmp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -709,7 +709,7 @@ static void igmp_gq_timer_expire(unsigne
in_dev->mr_gq_running = 0;
igmpv3_send_report(in_dev, NULL);
- __in_dev_put(in_dev);
+ in_dev_put(in_dev);
}
static void igmp_ifc_timer_expire(unsigned long data)
@@ -721,7 +721,7 @@ static void igmp_ifc_timer_expire(unsign
in_dev->mr_ifc_count--;
igmp_ifc_start_timer(in_dev, IGMP_Unsolicited_Report_Interval);
}
- __in_dev_put(in_dev);
+ in_dev_put(in_dev);
}
static void igmp_ifc_event(struct in_device *in_dev)
Patches currently in stable-queue which might be from noureddine@xxxxxxxxxxxxxxxxxx are
queue-3.4/ipv6-mcast-use-in6_dev_put-in-timer-handlers-instead-of-__in6_dev_put.patch
queue-3.4/ipv4-igmp-use-in_dev_put-in-timer-handlers-instead-of-__in_dev_put.patch
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