Patch "netfilter: ctnetlink: fix possible refcount leak in ctnetlink_create_conntrack()" has been added to the 6.2-stable tree

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This is a note to let you know that I've just added the patch titled

    netfilter: ctnetlink: fix possible refcount leak in ctnetlink_create_conntrack()

to the 6.2-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:
     netfilter-ctnetlink-fix-possible-refcount-leak-in-ct.patch
and it can be found in the queue-6.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 46b6faf35f6060ad27556385cc64b50c45f6283f
Author: Hangyu Hua <hbh25y@xxxxxxxxx>
Date:   Fri Feb 10 15:17:30 2023 +0800

    netfilter: ctnetlink: fix possible refcount leak in ctnetlink_create_conntrack()
    
    [ Upstream commit ac4893980bbe79ce383daf9a0885666a30fe4c83 ]
    
    nf_ct_put() needs to be called to put the refcount got by
    nf_conntrack_find_get() to avoid refcount leak when
    nf_conntrack_hash_check_insert() fails.
    
    Fixes: 7d367e06688d ("netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2)")
    Signed-off-by: Hangyu Hua <hbh25y@xxxxxxxxx>
    Acked-by: Florian Westphal <fw@xxxxxxxxx>
    Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 1286ae7d46096..ca4d5bb1ea524 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2375,12 +2375,15 @@ ctnetlink_create_conntrack(struct net *net,
 
 	err = nf_conntrack_hash_check_insert(ct);
 	if (err < 0)
-		goto err2;
+		goto err3;
 
 	rcu_read_unlock();
 
 	return ct;
 
+err3:
+	if (ct->master)
+		nf_ct_put(ct->master);
 err2:
 	rcu_read_unlock();
 err1:



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