Patch "netfilter: nft_set_pipapo: stop GC iteration if GC transaction allocation fails" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    netfilter: nft_set_pipapo: stop GC iteration if GC transaction allocation fails

to the 5.15-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-nft_set_pipapo-stop-gc-iteration-if-gc-tra.patch
and it can be found in the queue-5.15 subdirectory.

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



commit 30ace644350cdf0ef19e6a2364d13838df648f9c
Author: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date:   Fri Sep 22 18:43:11 2023 +0200

    netfilter: nft_set_pipapo: stop GC iteration if GC transaction allocation fails
    
    commit 6d365eabce3c018a80f6e0379b17df2abb17405e upstream.
    
    nft_trans_gc_queue_sync() enqueues the GC transaction and it allocates a
    new one. If this allocation fails, then stop this GC sync run and retry
    later.
    
    Fixes: 5f68718b34a5 ("netfilter: nf_tables: GC transaction API to avoid race with control plane")
    Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c
index 7248a1737ee14..83f5f276c3bff 100644
--- a/net/netfilter/nft_set_pipapo.c
+++ b/net/netfilter/nft_set_pipapo.c
@@ -1597,7 +1597,7 @@ static void pipapo_gc(const struct nft_set *_set, struct nft_pipapo_match *m)
 
 			gc = nft_trans_gc_queue_sync(gc, GFP_ATOMIC);
 			if (!gc)
-				break;
+				return;
 
 			nft_pipapo_gc_deactivate(net, set, e);
 			pipapo_drop(m, rulemap);