* [PATCH][next] net: hns3: fix dereference of ae_dev before it is null checked
@ 2019-06-17 11:42 Colin King
2019-06-17 21:05 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2019-06-17 11:42 UTC (permalink / raw)
To: Yisen Zhuang, Salil Mehta, David S . Miller, netdev
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
Pointer ae_dev is null checked however, prior to that it is dereferenced
when assigned pointer ops. Fix this by assigning pointer ops after ae_dev
has been null checked.
Addresses-Coverity: ("Dereference before null check")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 951a8125ea0c..58633cdcdcfd 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -1940,13 +1940,14 @@ static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
{
struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
- const struct hnae3_ae_ops *ops = ae_dev->ops;
+ const struct hnae3_ae_ops *ops;
enum hnae3_reset_type reset_type;
struct device *dev = &pdev->dev;
if (!ae_dev || !ae_dev->ops)
return PCI_ERS_RESULT_NONE;
+ ops = ae_dev->ops;
/* request the reset */
if (ops->reset_event) {
if (!ae_dev->override_pci_need_reset) {
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] net: hns3: fix dereference of ae_dev before it is null checked
2019-06-17 11:42 [PATCH][next] net: hns3: fix dereference of ae_dev before it is null checked Colin King
@ 2019-06-17 21:05 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2019-06-17 21:05 UTC (permalink / raw)
To: colin.king
Cc: yisen.zhuang, salil.mehta, netdev, kernel-janitors, linux-kernel
From: Colin King <colin.king@canonical.com>
Date: Mon, 17 Jun 2019 12:42:14 +0100
> From: Colin Ian King <colin.king@canonical.com>
>
> Pointer ae_dev is null checked however, prior to that it is dereferenced
> when assigned pointer ops. Fix this by assigning pointer ops after ae_dev
> has been null checked.
>
> Addresses-Coverity: ("Dereference before null check")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Applied.
^ permalink raw reply [flat|nested] 2+ messages in thread
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