Fix skb len calculation

Fix a bug that prevented TCP payload to be passed to lua scripts.
luainkernel · Aug 13, 2024 · a147522 · a147522
1 parent 9dd084c
commit a147522
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/lib/luaxtable.c b/lib/luaxtable.c
@@ -77,11 +77,11 @@ static inline lunatik_object_t *luaxtable_getskb(lua_State *L, luaxtable_t *xtab
 static int luaxtable_pushparams(lua_State *L, const struct xt_action_param *par, luaxtable_t *xtable, const struct sk_buff *skb, uint8_t opt)
 {
 	lunatik_object_t *data = luaxtable_getskb(L, xtable);
-	if (data == NULL) {
-		pr_err("could not find skb\n");
+	if (unlikely(data == NULL || skb_linearize(skb) != 0)) {
+		pr_err("could not get skb\n");
 		return -1;
 	}
-	luadata_reset(data, skb->data, skb_headlen(skb), opt);
+        luadata_reset(data, skb->data, skb->len, opt);
 
 	lua_newtable(L);
 	lua_pushboolean(L, par->hotdrop);