s2io: use snprintf() as a safety feature

"sp->desc[i]" has 25 characters.  "dev->name" has 15 characters.  If we
used all 15 characters then the sprintf() would overflow.

I changed the "sprintf(sp->name, "%s Neterion %s"" to snprintf(), as
well, even though it can't overflow just to be consistent.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index f5e4b82..db0c7a9 100644 (file)
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -6987,7 +6987,9 @@ static int s2io_add_isr(struct s2io_nic *sp)
                        if (sp->s2io_entries[i].in_use == MSIX_FLG) {
                                if (sp->s2io_entries[i].type ==
                                    MSIX_RING_TYPE) {
-                                       sprintf(sp->desc[i], "%s:MSI-X-%d-RX",
+                                       snprintf(sp->desc[i],
+                                               sizeof(sp->desc[i]),
+                                               "%s:MSI-X-%d-RX",
                                                dev->name, i);
                                        err = request_irq(sp->entries[i].vector,
                                                          s2io_msix_ring_handle,
@@ -6996,7 +6998,9 @@ static int s2io_add_isr(struct s2io_nic *sp)
                                                          sp->s2io_entries[i].arg);
                                } else if (sp->s2io_entries[i].type ==
                                           MSIX_ALARM_TYPE) {
-                                       sprintf(sp->desc[i], "%s:MSI-X-%d-TX",
+                                       snprintf(sp->desc[i],
+                                               sizeof(sp->desc[i]),
+                                               "%s:MSI-X-%d-TX",
                                                dev->name, i);
                                        err = request_irq(sp->entries[i].vector,
                                                          s2io_msix_fifo_handle,
@@ -8154,7 +8158,8 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
                          "%s: UDP Fragmentation Offload(UFO) enabled\n",
                          dev->name);
        /* Initialize device name */
-       sprintf(sp->name, "%s Neterion %s", dev->name, sp->product_name);
+       snprintf(sp->name, sizeof(sp->name), "%s Neterion %s", dev->name,
+                sp->product_name);
 
        if (vlan_tag_strip)
                sp->vlan_strip_flag = 1;