[PATCH net 04/13] idpf: nullify pointers after they are freed

[Tony Nguyen <anthony.l.nguyen@intel.com>]

From: Li Li <boolli@google.com>

rss_data->rss_key needs to be nullified after it is freed.
Checks like "if (!rss_data->rss_key)" in the code could fail
if it is not nullified.

Tested: built and booted the kernel.

Fixes: 83f38f210b85 ("idpf: Fix RSS LUT NULL pointer crash on early ethtool operations")
Signed-off-by: Li Li <boolli@google.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Samuel Salin <Samuel.salin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/idpf/idpf_lib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c
index 94da5fbd56f1..7ce6a0e4acb6 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lib.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c
@@ -1320,6 +1320,7 @@ static struct idpf_vport *idpf_vport_alloc(struct idpf_adapter *adapter,
 
 free_rss_key:
 	kfree(rss_data->rss_key);
+	rss_data->rss_key = NULL;
 free_qreg_chunks:
 	idpf_vport_deinit_queue_reg_chunks(adapter->vport_config[idx]);
 free_vector_idxs:
-- 
2.47.1