[PATCH 4.14 074/217] ipv6: mcast: fix unsolicited report interval after receiving querys

Greg Kroah-Hartman
2018-08-23T08:23:02Z

From: Hangbin Liu <liuhangbin@gmail.com>

[ Upstream commit 6c6da92808442908287fae8ebb0ca041a52469f4 ]

After recieving MLD querys, we update idev->mc_maxdelay with max_delay
from query header. This make the later unsolicited reports have the same
interval with mc_maxdelay, which means we may send unsolicited reports with
long interval time instead of default configured interval time.

Also as we will not call ipv6_mc_reset() after device up. This issue will
be there even after leave the group and join other groups.

Fixes: fc4eba58b4c14 ("ipv6: make unsolicited report intervals configurable for mld")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/mcast.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2083,7 +2083,8 @@ void ipv6_mc_dad_complete(struct inet6_d
mld_send_initial_cr(idev);
idev->mc_dad_count--;
if (idev->mc_dad_count)
- mld_dad_start_timer(idev, idev->mc_maxdelay);
+ mld_dad_start_timer(idev,
+ unsolicited_report_interval(idev));
}
}

@@ -2095,7 +2096,8 @@ static void mld_dad_timer_expire(unsigne
if (idev->mc_dad_count) {
idev->mc_dad_count--;
if (idev->mc_dad_count)
- mld_dad_start_timer(idev, idev->mc_maxdelay);
+ mld_dad_start_timer(idev,
+ unsolicited_report_interval(idev));
}
in6_dev_put(idev);
}
@@ -2453,7 +2455,8 @@ static void mld_ifc_timer_expire(unsigne
if (idev->mc_ifc_count) {
idev->mc_ifc_count--;
if (idev->mc_ifc_count)
- mld_ifc_start_timer(idev, idev->mc_maxdelay);
+ mld_ifc_start_timer(idev,
+ unsolicited_report_interval(idev));
}
in6_dev_put(idev);
}