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| author | Salam Noureddine <noureddine@aristanetworks.com> | 2013-09-29 13:39:42 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-30 22:28:56 -0700 |
| commit | e2401654dd0f5f3fb7a8d80dad9554d73d7ca394 (patch) | |
| tree | f069b5c04468689ec87ef6cdf0e97054ae3dcb41 /net/ipv4/igmp.c | |
| parent | 437a3ae1d0b42197928d52e1108bc2fdc14d23fd (diff) | |
| download | linux-e2401654dd0f5f3fb7a8d80dad9554d73d7ca394.tar.gz | |
ipv4 igmp: use in_dev_put in timer handlers instead of __in_dev_put
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>
Diffstat (limited to 'net/ipv4/igmp.c')
| -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 dace87f06e5f..7defdc9ba167 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -736,7 +736,7 @@ 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) @@ -749,7 +749,7 @@ static void igmp_ifc_timer_expire(unsigned long data) igmp_ifc_start_timer(in_dev, unsolicited_report_interval(in_dev)); } - __in_dev_put(in_dev); + in_dev_put(in_dev); } static void igmp_ifc_event(struct in_device *in_dev) |