From: Eric Dumazet <eduma...@google.com>
commit 9f00b2e7cf24 ("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.b...@linux.vnet.ibm.com>
Diagnosed-by: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Eric Dumazet <eduma...@google.com>
Tested-by: Srivatsa S. Bhat <srivatsa.b...@linux.vnet.ibm.com>
Cc: Cong Wang <amw...@redhat.com>
---
net/bridge/br_multicast.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 69af490..4b99c9a 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -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;
--
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