On Wed, Dec 21, 2022 at 3:20 PM Alvaro Karsz <alvaro.karsz@xxxxxxxxxxxxx> wrote:
>
> The buffer size and the size passed to snprintf don't match, causing
> clang warnings.
>
> This patch increases a little bit the size of the buffer, and uses
> sizeof() to get the buffer size.
>
> This patch should be applied on top of the following patch:
>
> virtio: vdpa: new SolidNET DPU driver,
> by Alvaro Karsz alvaro.karsz@xxxxxxxxxxxxx
>
> Reported-by: Nathan Chancellor <nathan@xxxxxxxxxx>
> Signed-off-by: Alvaro Karsz <alvaro.karsz@xxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Thanks
> ---
> drivers/vdpa/solidrun/snet_main.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
> index d438a89b359..9ceacf96de0 100644
> --- a/drivers/vdpa/solidrun/snet_main.c
> +++ b/drivers/vdpa/solidrun/snet_main.c
> @@ -540,7 +540,7 @@ static const struct vdpa_config_ops snet_config_ops = {
>
> static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
> {
> - char name[25];
> + char name[50];
> int ret, i, mask = 0;
> /* We don't know which BAR will be used to communicate..
> * We will map every bar with len > 0.
> @@ -558,7 +558,7 @@ static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
> return -ENODEV;
> }
>
> - snprintf(name, SNET_NAME_SIZE, "psnet[%s]-bars", pci_name(pdev));
> + snprintf(name, sizeof(name), "psnet[%s]-bars", pci_name(pdev));
> ret = pcim_iomap_regions(pdev, mask, name);
> if (ret) {
> SNET_ERR(pdev, "Failed to request and map PCI BARs\n");
> @@ -575,10 +575,10 @@ static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
>
> static int snet_open_vf_bar(struct pci_dev *pdev, struct snet *snet)
> {
> - char name[20];
> + char name[50];
> int ret;
>
> - snprintf(name, SNET_NAME_SIZE, "snet[%s]-bar", pci_name(pdev));
> + snprintf(name, sizeof(name), "snet[%s]-bar", pci_name(pdev));
> /* Request and map BAR */
> ret = pcim_iomap_regions(pdev, BIT(snet->psnet->cfg.vf_bar), name);
> if (ret) {
> --
> 2.32.0
>
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