netfilter: nf_tables: fix loop checking with end interval elements

Fix access to uninitialized data for end interval elements. The
element data part is uninitialized in interval end elements.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index d0c790e..adce01e 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2998,6 +2998,9 @@ static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
                                        const struct nft_set_iter *iter,
                                        const struct nft_set_elem *elem)
 {
+       if (elem->flags & NFT_SET_ELEM_INTERVAL_END)
+               return 0;
+
        switch (elem->data.verdict) {
        case NFT_JUMP:
        case NFT_GOTO: