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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>
This commit is contained in:
Arnd Bergmann 2017-07-14 14:07:04 +02:00 committed by David S. Miller
parent c41626ce31
commit c7673e4dea
1 changed files with 1 additions and 1 deletions
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drivers/net/vmxnet3/vmxnet3_int.h
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@ -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