From d964e6394786976d23baeb5eaad8bf3085700c46 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 8 Sep 2023 01:39:43 +0200 Subject: [PATCH -stable,5.4 19/20] netfilter: nft_set_hash: try later when GC hits EAGAIN on iteration commit b079155faae94e9b3ab9337e82100a914ebb4e8d upstream. Skip GC run if iterator rewinds to the beginning with EAGAIN, otherwise GC might collect the same element more than once. Fixes: f6c383b8c31a ("netfilter: nf_tables: adapt set backend to use GC transaction API") Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_set_hash.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/net/netfilter/nft_set_hash.c b/net/netfilter/nft_set_hash.c index 536cec72cbcf..d0843eb5ce51 100644 --- a/net/netfilter/nft_set_hash.c +++ b/net/netfilter/nft_set_hash.c @@ -324,12 +324,9 @@ static void nft_rhash_gc(struct work_struct *work) while ((he = rhashtable_walk_next(&hti))) { if (IS_ERR(he)) { - if (PTR_ERR(he) != -EAGAIN) { - nft_trans_gc_destroy(gc); - gc = NULL; - goto try_later; - } - continue; + nft_trans_gc_destroy(gc); + gc = NULL; + goto try_later; } /* Ruleset has been updated, try later. */ -- 2.30.2