vmxnet3: avoid format strint overflow warning

gcc-7 notices that "-event-%d" could be more than 11 characters long
if we had larger 'vector' numbers:

drivers/net/vmxnet3/vmxnet3_drv.c: In function 'vmxnet3_activate_dev':
drivers/net/vmxnet3/vmxnet3_drv.c:2095:40: error: 'sprintf' may write a terminating nul past the end of the destination [-Werror=format-overflow=]
sprintf(intr->event_msi_vector_name, "%s-event-%d",
                                     ^~~~~~~~~~~~~
drivers/net/vmxnet3/vmxnet3_drv.c:2095:3: note: 'sprintf' output between 9 and 33 bytes into a destination of size 32

The current code is safe, but making the string a little longer
is harmless and lets gcc see that it's ok.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h
index ba1c9f9..9c51b8b 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_int.h
+++ b/drivers/net/vmxnet3/vmxnet3_int.h
@@ -311,7 +311,7 @@ struct vmxnet3_intr {
        u8  num_intrs;                  /* # of intr vectors */
        u8  event_intr_idx;             /* idx of the intr vector for event */
        u8  mod_levels[VMXNET3_LINUX_MAX_MSIX_VECT]; /* moderation level */
-       char    event_msi_vector_name[IFNAMSIZ+11];
+       char    event_msi_vector_name[IFNAMSIZ+17];
 #ifdef CONFIG_PCI_MSI
        struct msix_entry msix_entries[VMXNET3_LINUX_MAX_MSIX_VECT];
 #endif