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netfilter: nf_tables: possible module reference underflow in error path

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dst->ops is set on when nft_expr_clone() fails, but module refcount has
not been bumped yet, therefore nft_expr_destroy() leads to module
reference underflow.

Fixes: 8cfd9b0f8515 ("netfilter: nftables: generalize set expressions support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2022-08-09 17:23:52 +02:00
parent 4963674c2e
commit c485c35ff6
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nf_tables_api.c
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@ -5601,7 +5601,7 @@ int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
err = nft_expr_clone(expr, set->exprs[i]);
if (err < 0) {
nft_expr_destroy(ctx, expr);
kfree(expr);
goto err_expr;
}
expr_array[i] = expr;