diff options
| author | Hangbin Liu <liuhangbin@gmail.com> | 2018-07-20 14:04:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-28 07:49:11 +0200 |
| commit | cc403d5dc140ba74400335b84b91f97d07dbd569 (patch) | |
| tree | d6fb7abcfdf8ebbe3999d6e63c22f5d0cae831b8 | |
| parent | b7e37add79bf1a2c9f4a7574b0d7f53f0f6df663 (diff) | |
multicast: do not restore deleted record source filter mode to new one
There are two scenarios that we will restore deleted records. The first is
when device down and up(or unmap/remap). In this scenario the new filter
mode is same with previous one. Because we get it from in_dev->mc_list and
we do not touch it during device down and up.
The other scenario is when a new socket join a group which was just delete
and not finish sending status reports. In this scenario, we should use the
current filter mode instead of restore old one. Here are 4 cases in total.
old_socket new_socket before_fix after_fix
IN(A) IN(A) ALLOW(A) ALLOW(A)
IN(A) EX( ) TO_IN( ) TO_EX( )
EX( ) IN(A) TO_EX( ) ALLOW(A)
EX( ) EX( ) TO_EX( ) TO_EX( )
Fixes: 24803f38a5c0b (igmp: do not remove igmp souce list info when set link down)
Fixes: 1666d49e1d416 (mld: do not remove mld souce list info when set link down)
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv4/igmp.c | 3 | ||||
| -rw-r--r-- | net/ipv6/mcast.c | 3 |
2 files changed, 2 insertions, 4 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 7f5fe07d0b13..f2e6e874e4ec 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1193,8 +1193,7 @@ static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im) if (pmc) { im->interface = pmc->interface; im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv; - im->sfmode = pmc->sfmode; - if (pmc->sfmode == MCAST_INCLUDE) { + if (im->sfmode == MCAST_INCLUDE) { im->tomb = pmc->tomb; im->sources = pmc->sources; for (psf = im->sources; psf; psf = psf->sf_next) diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index ca8fac6e5a09..918c161e5b55 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -771,8 +771,7 @@ static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) if (pmc) { im->idev = pmc->idev; im->mca_crcount = idev->mc_qrv; - im->mca_sfmode = pmc->mca_sfmode; - if (pmc->mca_sfmode == MCAST_INCLUDE) { + if (im->mca_sfmode == MCAST_INCLUDE) { im->mca_tomb = pmc->mca_tomb; im->mca_sources = pmc->mca_sources; for (psf = im->mca_sources; psf; psf = psf->sf_next) |