From: Daniel P. Berrangé <berra...@redhat.com>
hw/usb/hcd-xhci.c: In function ‘usb_xhci_realize’:
hw/usb/hcd-xhci.c:3339:66: warning: ‘%d’ directive output may be truncated
writing between 1 and 10 bytes into a region of size 5 [-Wformat-trunca\
tion=]
3339 | snprintf(port->name, sizeof(port->name), "usb2 port #%d",
i+1);
| ^~
hw/usb/hcd-xhci.c:3339:54: note: directive argument in the range [1, 2147483647]
3339 | snprintf(port->name, sizeof(port->name), "usb2 port #%d",
i+1);
| ^~~~~~~~~~~~~~~
The xhci code formats the port name into a fixed length
buffer which is only large enough to hold port numbers
upto 5 digits in decimal representation. We're never
going to have a port number that large, so aserting the
port number is sensible is sufficient to tell GCC the
formatted string won't be truncated.
Signed-off-by: Daniel P. Berrangé <berra...@redhat.com>
Message-Id: <20190412121626.19829-5-berra...@redhat.com>
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
hw/usb/hcd-xhci.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index d8472b4fea7f..9f8f9e45eceb 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -3336,6 +3336,7 @@ static void usb_xhci_init(XHCIState *xhci)
USB_SPEED_MASK_LOW |
USB_SPEED_MASK_FULL |
USB_SPEED_MASK_HIGH;
+ assert(i < MAXPORTS);
snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+1);
speedmask |= port->speedmask;
}
@@ -3349,6 +3350,7 @@ static void usb_xhci_init(XHCIState *xhci)
}
port->uport = &xhci->uports[i];
port->speedmask = USB_SPEED_MASK_SUPER;
+ assert(i < MAXPORTS);
snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+1);
speedmask |= port->speedmask;
}
--
2.18.1
