From 8f29881eb732ca087069fcc8f65ffa316fc63185 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 6 Aug 2017 23:37:01 +0200
Subject: [PATCH] i40e: Fix a potential NULL pointer dereference

commit 54902349ee95045b67e2f0c39b75f5418540064b upstream.

If 'kzalloc()' fails, a NULL pointer will be dereferenced.
Return an error code (-ENOMEM) instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 7484ad3c955d..0f54269ffc46 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -422,6 +422,9 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
 	       (sizeof(struct i40e_virtchnl_iwarp_qv_info) *
 						(qvlist_info->num_vectors - 1));
 	vf->qvlist_info = kzalloc(size, GFP_KERNEL);
+	if (!vf->qvlist_info)
+		return -ENOMEM;
+
 	vf->qvlist_info->num_vectors = qvlist_info->num_vectors;
 
 	msix_vf = pf->hw.func_caps.num_msix_vectors_vf;