[06/22] scsi: fnic: fix format string overflow warning

Message ID 20170714120720.906842-7-arnd@arndb.de
State New
Headers show
Series
  • gcc-7 -Wformat-* warnings
Related show

Commit Message

Arnd Bergmann July 14, 2017, 12:06 p.m.
The MSI interrupt name can require 11 bytes in addition to the device name,
for a total of 23 bytes:

drivers/scsi/fnic/fnic_isr.c: In function 'fnic_request_intr':
drivers/scsi/fnic/fnic_isr.c:192:4: error: '-fcs-rq' directive writing 7 bytes into a region of size between 5 and 16 [-Werror=format-overflow=]
    "%.11s-fcs-rq", fnic->name);
drivers/scsi/fnic/fnic_isr.c:206:3: note: 'sprintf' output between 12 and 23 bytes into a destination of size 16
   sprintf(fnic->msix[FNIC_MSIX_ERR_NOTIFY].devname,
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    "%.11s-err-notify", fnic->name);

This extends the buffer to fit any possible value.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 drivers/scsi/fnic/fnic.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.9.0

Patch

diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
index 67aab965c0f4..d094ba59ed15 100644
--- a/drivers/scsi/fnic/fnic.h
+++ b/drivers/scsi/fnic/fnic.h
@@ -180,7 +180,7 @@  enum fnic_msix_intr_index {
 
 struct fnic_msix_entry {
 	int requested;
-	char devname[IFNAMSIZ];
+	char devname[IFNAMSIZ + 11];
 	irqreturn_t (*isr)(int, void *);
 	void *devid;
 };