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netfilter: nf_tables: fix userdata memleak 

When userdata was introduced for tables and objects its allocation was
only freed inside the error path of the new{table, object} functions.

Free user data inside corresponding destroy functions for tables and
objects.

Fixes: b131c96496 ("netfilter: nf_tables: add userdata support for nft_object")
Fixes: 7a81575b80 ("netfilter: nf_tables: add userdata attributes to nft_table")
Signed-off-by: Jose M. Guisado Gomez <guigom@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jose M. Guisado Gomez 2020-09-27 10:36:22 +02:00 committed by Pablo Neira Ayuso
parent 18cd9b00ff
commit bc7a708235
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/nf_tables_api.c
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@ -1211,6 +1211,7 @@ static void nf_tables_table_destroy(struct nft_ctx *ctx)
rhltable_destroy(&ctx->table->chains_ht);
kfree(ctx->table->name);
kfree(ctx->table->udata);
kfree(ctx->table);
}
@ -6231,6 +6232,7 @@ static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
module_put(obj->ops->type->owner);
kfree(obj->key.name);
kfree(obj->udata);
kfree(obj);
}