cxgb4: fix memory leak in cxgb4_init_ethtool_filters() error path

In the for loop used to allocate the loc_array and bmap for each port, a
memory leak is possible when the allocation for loc_array succeeds,
but the allocation for bmap fails. This is because when the control flow
goes to the label free_eth_finfo, only the allocations starting from
(i-1)th iteration are freed.

Fix that by freeing the loc_array in the bmap allocation error path.

Fixes: d915c29 ("cxgb4: add skeleton for ethtool n-tuple filters")
Signed-off-by: Abdun Nihaal <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Jacob Keller <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: nifey

drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c

@@ -2270,6 +2270,7 @@ int cxgb4_init_ethtool_filters(struct adapter *adap)
 		eth_filter->port[i].bmap = bitmap_zalloc(nentries, GFP_KERNEL);
 		if (!eth_filter->port[i].bmap) {
 			ret = -ENOMEM;
+			kvfree(eth_filter->port[i].loc_array);
 			goto free_eth_finfo;
 		}
 	}