NACK/Cmnt: [SRU][F:linux-bluefield][PATCH] netfilter: flowtable: Free block_cb when being deleted

[Stefan Bader]

On 18.05.21 23:42, Daniel Jurgens wrote:
> From: Roi Dayan <roid at mellanox.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1927252
> 
> Free block_cb memory when asked to be deleted.
> 
> Fixes: 978703f42549 ("netfilter: flowtable: Add API for registering to flow table events")
> Signed-off-by: Roi Dayan <roid at mellanox.com>
> Reviewed-by: Paul Blakey <paulb at mellanox.com>
> Reviewed-by: Oz Shlomo <ozsh at mellanox.com>
> Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>
> (backported from commit bc8e71314e8444c6315c482441f3204c032ab327)
> Signed-off-by: Daniel Jurgens <danielj at nvidia.com>
> 
> ---
>   net/netfilter/nf_flow_table_core.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
> index 5144e31..0336117 100644
> --- a/net/netfilter/nf_flow_table_core.c
> +++ b/net/netfilter/nf_flow_table_core.c
> @@ -427,10 +427,12 @@ void nf_flow_table_offload_del_cb(struct nf_flowtable *flow_table,
>   
>   	mutex_lock(&flow_table->flow_block_lock);
>   	block_cb = flow_block_cb_lookup(block, cb, cb_priv);
> -	if (block_cb)
> +	if (block_cb) {
>   		list_del(&block_cb->list);
> -	else
> +		flow_block_cb_free(block_cb);
> +	} else {
>   		WARN_ON(true);
> +	}
>   	mutex_unlock(&flow_table->flow_block_lock);
>   }
>   EXPORT_SYMBOL_GPL(nf_flow_table_offload_del_cb);
> 


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