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| author | Salam Noureddine <noureddine@aristanetworks.com> | 2013-09-29 13:41:34 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-13 18:14:26 -0700 |
| commit | 6b13db47f96a5ec8705ea90fc209256f227ec1b1 (patch) | |
| tree | 054b9153492dc087d27ba251399c0fde5c544242 /net | |
| parent | 6644f8f7fd8b580ba118d6403a670b2daab06e01 (diff) | |
| download | lwn-6b13db47f96a5ec8705ea90fc209256f227ec1b1.tar.gz lwn-6b13db47f96a5ec8705ea90fc209256f227ec1b1.zip | |
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.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 99cd65c715cd..6b84fc00edae 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -1862,7 +1862,7 @@ 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, @@ -2207,7 +2207,7 @@ 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) @@ -2220,7 +2220,7 @@ 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) |