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authorSalam Noureddine <noureddine@aristanetworks.com>2013-09-29 13:41:34 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-13 16:08:30 -0700
commitef04c1db0aef35f8d006d18c79cacd11925078ec (patch)
tree6da4d6fa1b21c3a4e3fb6320223eee38c40850fc /net
parentfbf96d75f4a320c66e03a21b2a46d0985b6d096b (diff)
downloadvexpress-lsk-ef04c1db0aef35f8d006d18c79cacd11925078ec.tar.gz
ipv6 mcast: use in6_dev_put in timer handlers instead of __in6_dev_put
[ Upstream commit 9260d3e1013701aa814d10c8fc6a9f92bd17d643 ] It is possible for the timer handlers to run after the call to ipv6_mc_down so use in6_dev_put instead of __in6_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 inet6_dev 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@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/mcast.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index c3998c2bbc5..952eaed3880 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2158,7 +2158,7 @@ static void mld_gq_timer_expire(unsigned long data)
idev->mc_gq_running = 0;
mld_send_report(idev, NULL);
- __in6_dev_put(idev);
+ in6_dev_put(idev);
}
static void mld_ifc_timer_expire(unsigned long data)
@@ -2171,7 +2171,7 @@ static void mld_ifc_timer_expire(unsigned long data)
if (idev->mc_ifc_count)
mld_ifc_start_timer(idev, idev->mc_maxdelay);
}
- __in6_dev_put(idev);
+ in6_dev_put(idev);
}
static void mld_ifc_event(struct inet6_dev *idev)