I'm sorry to send this to linux-iio by mistake. I will cautiously submit patches later.
> -----Original Messages-----
> From: "Yongzhi Liu" <lyz_cs@xxxxxxxxxx>
> Sent Time: 2022-05-21 11:31:02 (Saturday)
> To: agross@xxxxxxxxxx, bjorn.andersson@xxxxxxxxxx, jic23@xxxxxxxxxx, lars@xxxxxxxxxx, svarbanov@xxxxxxxxxx, iivanov@xxxxxxxxxx, jonathan.cameron@xxxxxxxxxx
> Cc: linux-arm-msm@xxxxxxxxxxxxxxx, linux-iio@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, fuyq@xxxxxxxxxxxxxx, "Yongzhi Liu" <lyz_cs@xxxxxxxxxx>
> Subject: [PATCH] hv_netvsc: Fix potential dereference of NULL pointer
>
> The return value of netvsc_devinfo_get()
> needs to be checked to avoid use of NULL
> pointer in case of an allocation failure.
>
> Fixes: 0efeea5fb ("hv_netvsc: Add the support of hibernation")
>
> Signed-off-by: Yongzhi Liu <lyz_cs@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 fde1c49..b1dece6 100644
> --- a/drivers/net/hyperv/netvsc_drv.c
> +++ b/drivers/net/hyperv/netvsc_drv.c
> @@ -2671,7 +2671,10 @@ 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();
> --
> 2.7.4
