@@ -1217,8 +1217,8 @@ static void relational_binop_postprocess(struct rule_pp_ctx *ctx, struct expr *e
} else if (binop->op == OP_AND &&
binop->left->ops->type == EXPR_PAYLOAD &&
binop->right->ops->type == EXPR_VALUE) {
- struct expr *payload = expr->left->left;
- struct expr *mask = expr->left->right;
+ struct expr *payload = binop->left;
+ struct expr *mask = binop->right;
/*
* This *might* be a payload match testing header fields that
@@ -1266,7 +1266,7 @@ static void relational_binop_postprocess(struct rule_pp_ctx *ctx, struct expr *e
assert(expr->left->ops->type == EXPR_BINOP);
assert(binop->left == payload);
- expr->left = payload;
+ expr->left = expr_get(payload);
expr_free(binop);
}
}
We have to clone the payload expression before attaching it to the lhs of the relational expression, this payload expression is located at the lhs of the binary operation that is released thereafter. Fixes: 39f15c2 ("nft: support listing expressions that use non-byte header fields") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> --- v2: use expr_get() instead to avoid the extra cost of cloning. src/netlink_delinearize.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)