From: Yongzhi Liu lyz_cs@pku.edu.cn
[ 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@pku.edu.cn Reviewed-by: Haiyang Zhang haiyangz@microsoft.com Link: https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@pku.edu.... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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();