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Diffstat (limited to 'hw/usb/bus.c')
-rw-r--r--hw/usb/bus.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 5939b273b9..d910f849e7 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -407,8 +407,10 @@ void usb_register_companion(const char *masterbus, USBPort *ports[],
void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
{
if (upstream) {
- snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
- upstream->path, portnr);
+ int l = snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
+ upstream->path, portnr);
+ /* Max string is nn.nn.nn.nn.nn, which fits in 16 bytes */
+ assert(l < sizeof(downstream->path));
downstream->hubcount = upstream->hubcount + 1;
} else {
snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);