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authorYuyang Du <yuyang.du@intel.com>2017-05-22 18:20:15 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-13 10:48:24 +0200
commitc3509715fc9484a48b69a9f0196b728c960840c9 (patch)
tree9f1e1b73a8d366d6a19bf00925a26f1f285ad822 /tools/usb
parentb3b51417d0af63fb9a06662dc292200aed9ea53f (diff)
downloadlinux-c3509715fc9484a48b69a9f0196b728c960840c9.tar.bz2
usb: usbip tool: Check the return of get_nports()
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@samsung.com> Signed-off-by: Yuyang Du <yuyang.du@intel.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/usb')
-rw-r--r--tools/usb/usbip/libsrc/vhci_driver.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
index f659c146cdc8..036b62be0fc7 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;