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netfilter: nf_tables: fix memory leak if expr init fails

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If expr init fails then we need to free it.

So when the user add a nft rule as follows:

  # nft add rule filter input tcp dport 22 flow table ssh \
    { ip saddr limit rate 0/second }

memory leak will happen.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-06-20 21:11:45 +08:00 committed by Pablo Neira Ayuso
parent acd43fe85b
commit 6cafaf4764
1 changed files with 3 additions and 1 deletions
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4
net/netfilter/nf_tables_api.c
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@ -1724,9 +1724,11 @@ struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
err = nf_tables_newexpr(ctx, &info, expr);
if (err < 0)
goto err2;
goto err3;
return expr;
err3:
kfree(expr);
err2:
module_put(info.ops->type->owner);
err1: