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| author | Salam Noureddine <noureddine@aristanetworks.com> | 2013-09-29 13:39:42 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-13 15:42:48 -0700 |
| commit | e723dd8bbde1ae36128fdeae766cd5447d747bf0 (patch) | |
| tree | 26a7d8aca13504402e1685d700c96e2dacf2474b | |
| parent | 4f7a6b6fa0ffe6432ba37a82c7f29e583ffd3dc7 (diff) | |
| download | lwn-e723dd8bbde1ae36128fdeae766cd5447d747bf0.tar.gz lwn-e723dd8bbde1ae36128fdeae766cd5447d747bf0.zip | |
ipv4 igmp: use in_dev_put in timer handlers instead of __in_dev_put
[ 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@aristanetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv4/igmp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 9fdcb60d4f2f..c8e26992742f 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -709,7 +709,7 @@ static void igmp_gq_timer_expire(unsigned long data) 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(unsigned long data) 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) |