Re: [PATCH][next] netfilter: nf_tables: Fix dereference of null pointer flow

[Pablo Neira Ayuso]

On Thu, Jun 24, 2021 at 08:57:18PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> 
> In the case where chain->flags & NFT_CHAIN_HW_OFFLOAD is false then
> nft_flow_rule_create is not called and flow is NULL. The subsequent
> error handling execution via label err_destroy_flow_rule will lead
> to a null pointer dereference on flow when calling nft_flow_rule_destroy.
> Since the error path to err_destroy_flow_rule has to cater for null
> and non-null flows, only call nft_flow_rule_destroy if flow is non-null
> to fix this issue.

Applied, thanks.