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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index fae3625ec0b67ee816d483e9dbe2a64718441d80..8d2f4e860767430e1357f82cbae00254eab0d648 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -423,6 +423,9 @@ static int i40e_config_iwarp_qvlist(struct i40e_vf *vf,
               (sizeof(struct 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;