netfilter: nft_compat: call {target, match}->destroy() to cleanup entry

Otherwise, the reference to external objects (eg. modules) are not
released when the rules are removed.

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

diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c
index 8a779be..1840989 100644 (file)
--- a/net/netfilter/nft_compat.c
+++ b/net/netfilter/nft_compat.c
@@ -195,6 +195,15 @@ static void
 nft_target_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr)
 {
        struct xt_target *target = expr->ops->data;
+       void *info = nft_expr_priv(expr);
+       struct xt_tgdtor_param par;
+
+       par.net = ctx->net;
+       par.target = target;
+       par.targinfo = info;
+       par.family = ctx->afi->family;
+       if (par.target->destroy != NULL)
+               par.target->destroy(&par);
 
        module_put(target->me);
 }
@@ -382,6 +391,15 @@ static void
 nft_match_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr)
 {
        struct xt_match *match = expr->ops->data;
+       void *info = nft_expr_priv(expr);
+       struct xt_mtdtor_param par;
+
+       par.net = ctx->net;
+       par.match = match;
+       par.matchinfo = info;
+       par.family = ctx->afi->family;
+       if (par.match->destroy != NULL)
+               par.match->destroy(&par);
 
        module_put(match->me);
 }