4.19-stable review patch. If anyone has any objections, please let me know.
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From: Pablo Neira Ayuso pablo@netfilter.org
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 pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/nft_set_hash.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
--- a/net/netfilter/nft_set_hash.c +++ b/net/netfilter/nft_set_hash.c @@ -321,12 +321,9 @@ static void nft_rhash_gc(struct work_str
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. */