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ipv6 mcast: use in6_dev_put in timer handlers instead of __in6_dev_put

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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>
This commit is contained in:
Salam Noureddine 2013-09-29 13:41:34 -07:00 committed by David S. Miller
parent e2401654dd
commit 9260d3e101
1 changed files with 3 additions and 3 deletions
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6
net/ipv6/mcast.c
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@ -2034,7 +2034,7 @@ static void mld_dad_timer_expire(unsigned long data)
if (idev->mc_dad_count)
mld_dad_start_timer(idev, idev->mc_maxdelay);
}
__in6_dev_put(idev);
in6_dev_put(idev);
}
static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
@ -2379,7 +2379,7 @@ 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)
@ -2392,7 +2392,7 @@ 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)