From: Yuyang Du <yuyang.du@xxxxxxxxx>
If we get nonpositive number of ports, there is no sense to
continue, then fail gracefully.
In addition, the commit 0775a9cbc694e8c72 ("usbip: vhci extension:
modifications to vhci driver") introduced configurable numbers of
controllers and ports, but we have a static port number maximum,
MAXNPORT. If exceeded, the idev array will be overflown. We fix
it by validating the nports to make sure the port number max is
not exceeded.
Reviewed-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
Signed-off-by: Yuyang Du <yuyang.du@xxxxxxxxx>
Acked-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
---
tools/usb/usbip/libsrc/vhci_driver.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
index f659c14..036b62b 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.c
+++ b/tools/usb/usbip/libsrc/vhci_driver.c
@@ -220,9 +220,16 @@ int usbip_vhci_driver_open(void)
}
vhci_driver->nports = get_nports();
-
dbg("available ports: %d", vhci_driver->nports);
+ if (vhci_driver->nports <= 0) {
+ err("no available ports");
+ goto err;
+ } else if (vhci_driver->nports > MAXNPORT) {
+ err("port number exceeds %d", MAXNPORT);
+ goto err;
+ }
+
if (refresh_imported_device_list())
goto err;
--
2.7.4
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