[PATCH 3/4] Check pci slot number against PCIBUS_MAX_DEVICES in parse_pci_devfn

[Ken CC <ken.ccao@gmail.com>]

If pci addr provided from command line is bigger than 32,
PCIBUS_MAX_DEVICES, return error -EINVAL.

32 << 3 | 7 == 256 (PCIBUS_MAX_FUNCTIONS)
PCIBUS_MAX_FUNCTIONS = PCIBUS_MAX_DEVICES * PCI_FUNCTIONS_PER_DEVICE

Signed-off-by: Ken CC <ken.ccao@gmail.com>
---
 hw/qdev-properties.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 9219cd7..565fd08 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -1,5 +1,5 @@
 #include "net.h"
-#include "qdev.h"
+#include "pci.h"
 #include "qerror.h"
 
 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
@@ -514,6 +514,8 @@ static int parse_pci_devfn(DeviceState *dev, Property *prop, const char *str)
             return -EINVAL;
         }
     }
+    if (slot >= PCIBUS_MAX_DEVICES)
+        return -EINVAL;
     if (str[n] != '\0')
         return -EINVAL;
     if (fn > 7)