This is a note to let you know that I've just added the patch titled igmp, mld: Fix memory leak in igmpv3/mld_del_delrec() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: igmp-mld-fix-memory-leak-in-igmpv3-mld_del_delrec.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Tue Feb 14 17:03:08 PST 2017 From: Hangbin Liu <liuhangbin@xxxxxxxxx> Date: Wed, 8 Feb 2017 21:16:45 +0800 Subject: igmp, mld: Fix memory leak in igmpv3/mld_del_delrec() From: Hangbin Liu <liuhangbin@xxxxxxxxx> [ Upstream commit 9c8bb163ae784be4f79ae504e78c862806087c54 ] In function igmpv3/mld_add_delrec() we allocate pmc and put it in idev->mc_tomb, so we should free it when we don't need it in del_delrec(). But I removed kfree(pmc) incorrectly in latest two patches. Now fix it. Fixes: 24803f38a5c0 ("igmp: do not remove igmp souce list info when ...") Fixes: 1666d49e1d41 ("mld: do not remove mld souce list info when ...") Reported-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx> Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ipv4/igmp.c | 1 + net/ipv6/mcast.c | 1 + 2 files changed, 2 insertions(+) --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1172,6 +1172,7 @@ static void igmpv3_del_delrec(struct in_ psf->sf_crcount = im->crcount; } in_dev_put(pmc->interface); + kfree(pmc); } spin_unlock_bh(&im->lock); } --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -779,6 +779,7 @@ static void mld_del_delrec(struct inet6_ psf->sf_crcount = im->mca_crcount; } in6_dev_put(pmc->idev); + kfree(pmc); } spin_unlock_bh(&im->mca_lock); } Patches currently in stable-queue which might be from liuhangbin@xxxxxxxxx are queue-4.9/igmp-mld-fix-memory-leak-in-igmpv3-mld_del_delrec.patch queue-4.9/mld-do-not-remove-mld-souce-list-info-when-set-link-down.patch