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| author | Hangbin Liu <liuhangbin@gmail.com> | 2018-07-20 14:04:27 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-21 22:58:17 -0700 |
| commit | 08d3ffcc0cfaba36f6b86fd568cc3bc773061fa6 (patch) | |
| tree | 52464f06f9bfb54a148f380eb244ed4d7f703159 /net/ipv6 | |
| parent | 3d82475ad46c0b65f2618b5f2bbb4cadbb5ac5d8 (diff) | |
| download | linux-stable-08d3ffcc0cfaba36f6b86fd568cc3bc773061fa6.tar.gz linux-stable-08d3ffcc0cfaba36f6b86fd568cc3bc773061fa6.tar.bz2 linux-stable-08d3ffcc0cfaba36f6b86fd568cc3bc773061fa6.zip | |
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>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/mcast.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 2699be7202be..f60f310785fd 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -790,8 +790,7 @@ static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) spin_lock_bh(&im->mca_lock); if (pmc) { im->idev = pmc->idev; - 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) |