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bridge: do not call setup_timer() multiple times

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commit 9f00b2e7cf ("bridge: only expire the mdb entry when query is
received") added a nasty bug as an active timer can be reinitialized.

setup_timer() must be done once, no matter how many time mod_timer()
is called. br_multicast_new_group() is the right place to do this.

Reported-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Diagnosed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-07-19 20:07:16 -07:00 committed by David S. Miller
parent 651e92716a
commit 1faabf2aab
1 changed files with 3 additions and 2 deletions
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5
net/bridge/br_multicast.c
View file

@ -619,6 +619,9 @@ rehash:
mp->br = br;
mp->addr = *group;
setup_timer(&mp->timer, br_multicast_group_expired,
(unsigned long)mp);
hlist_add_head_rcu(&mp->hlist[mdb->ver], &mdb->mhash[hash]);
mdb->size++;
@ -1126,7 +1129,6 @@ static int br_ip4_multicast_query(struct net_bridge *br,
if (!mp)
goto out;
setup_timer(&mp->timer, br_multicast_group_expired, (unsigned long)mp);
mod_timer(&mp->timer, now + br->multicast_membership_interval);
mp->timer_armed = true;
@ -1204,7 +1206,6 @@ static int br_ip6_multicast_query(struct net_bridge *br,
if (!mp)
goto out;
setup_timer(&mp->timer, br_multicast_group_expired, (unsigned long)mp);
mod_timer(&mp->timer, now + br->multicast_membership_interval);
mp->timer_armed = true;