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authorPablo Neira Ayuso <pablo@netfilter.org>2020-03-31 23:02:59 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2020-04-05 23:26:36 +0200
commita26c1e49c8e97922edc8d7e23683384729d09f77 (patch)
treea574149daa02cf52bf554569ea40f2cada4caa7a /include/net
parent72239f2795fab9a58633bd0399698ff7581534a3 (diff)
netfilter: nf_tables: do not update stateful expressions if lookup is inverted
Initialize set lookup matching element to NULL. Otherwise, the NFT_LOOKUP_F_INV flag reverses the matching logic and it leads to deference an uninitialized pointer to the matching element. Make sure element data area and stateful expression are accessed if there is a matching set element. This patch undoes 24791b9aa1ab ("netfilter: nft_set_bitmap: initialize set element extension in lookups") which is not required anymore. Fixes: 339706bc21c1 ("netfilter: nft_lookup: update element stateful expression") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/netfilter/nf_tables.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 6eb627b3c99b..4ff7c81e6717 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -901,7 +901,7 @@ static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext,
{
struct nft_expr *expr;
- if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) {
+ if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) {
expr = nft_set_ext_expr(ext);
expr->ops->eval(expr, regs, pkt);
}