From: Yongzhi Liu <lyz_cs@xxxxxxxxxx>
[ Upstream commit eb4c0788964730d12e8dd520bd8f5217ca48321c ]
The return value of netvsc_devinfo_get()
needs to be checked to avoid use of NULL
pointer in case of an allocation failure.
Fixes: 0efeea5fb153 ("hv_netvsc: Add the support of hibernation")
Signed-off-by: Yongzhi Liu <lyz_cs@xxxxxxxxxx>
Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/hyperv/netvsc_drv.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index bdfcf75f0827..ae4577731e3e 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -2665,7 +2665,10 @@ static int netvsc_suspend(struct hv_device *dev)
/* Save the current config info */
ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);
-
+ if (!ndev_ctx->saved_netvsc_dev_info) {
+ ret = -ENOMEM;
+ goto out;
+ }
ret = netvsc_detach(net, nvdev);
out:
rtnl_unlock();
--
2.35.1
