> On Fri, Dec 02, 2022 at 03:03:31PM +0800, Li Qiong wrote: >> The 'ret' should need to be initialized to 0, in case >> return a uninitialized value. > Why is 0 the right value? And which case would it be? > We clearly need to know that to figure out which return > value would be correct for it... Hi, here is a case: for (i = 0; i < e->num_hook_entries; i++) { ret = e->hooks[i].hook(e->hooks[i].priv, skb, state); if (ret != NF_ACCEPT) return ret; .... } I am not sure if 0 (NF_DROP) is the best value, but It's better to initialize a value.