diff options
| author | Ben Hutchings <ben@decadent.org.uk> | 2012-01-09 14:06:46 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-12 11:35:41 -0800 |
| commit | 49ffa26eca87d3518ed88d3e6feebf1b80837a15 (patch) | |
| tree | a7c4569f759bde3a770e4ac52671edd21afc0851 | |
| parent | 06752b6cc142845a2c21196fa86a0cba7d72d325 (diff) | |
igmp: Avoid zero delay when receiving odd mixture of IGMP queries
commit a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27 upstream.
Commit 5b7c84066733c5dfb0e4016d939757b38de189e4 ('ipv4: correct IGMP
behavior on v3 query during v2-compatibility mode') added yet another
case for query parsing, which can result in max_delay = 0. Substitute
a value of 1, as in the usual v3 case.
Reported-by: Simon McVittie <smcv@debian.org>
References: http://bugs.debian.org/654876
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/igmp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index d577199eabd..e0d42dbb33f 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -875,6 +875,8 @@ static void igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb, * to be intended in a v3 query. */ max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE); + if (!max_delay) + max_delay = 1; /* can't mod w/ 0 */ } else { /* v3 */ if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) return; |