mlxsw: Use correct skb length when dumping payload

Do not use the length of the transmitted skb (which was freed), but
that of the response skb.

This issue was discovered using the Kernel Address sanitizer (KASan).

Signed-off-by: Ido Schimmel <[email protected]>
Signed-off-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: idosch

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -1073,7 +1073,7 @@ static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
 			mlxsw_core->emad.tid - 1);
 		mlxsw_core_buf_dump_dbg(mlxsw_core,
 					mlxsw_core->emad.resp_skb->data,
-					skb->len);
+					mlxsw_core->emad.resp_skb->len);
 
 		dev_kfree_skb(mlxsw_core->emad.resp_skb);
 	}