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authorShuah Khan <shuahkh@osg.samsung.com>2018-03-22 05:21:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-22 15:08:20 +0300
commit2699126bcf18db672451b82b26a1c8e954784fad (patch)
tree38aaaeaa85f715885ad2b62ea8e679b058e6b63e
parent1cbd53c8cd85a63383a075347abee8f6e3f14fbe (diff)
downloadlinux-2699126bcf18db672451b82b26a1c8e954784fad.tar.xz
usbip: tools: usbipd: exclude exported devices from exportable device list
usbipd includes exported devices in response to exportable device list. Exclude exported devices from exportable device list to avoid: - import requests for devices that are exported only to fail the request. - revealing devices that are imported by a client to another client. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--tools/usb/usbip/src/usbipd.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/tools/usb/usbip/src/usbipd.c b/tools/usb/usbip/src/usbipd.c
index f8ff735eb100..32864c52942d 100644
--- a/tools/usb/usbip/src/usbipd.c
+++ b/tools/usb/usbip/src/usbipd.c
@@ -175,10 +175,21 @@ static int send_reply_devlist(int connfd)
struct list_head *j;
int rc, i;
+ /*
+ * Exclude devices that are already exported to a client from
+ * the exportable device list to avoid:
+ * - import requests for devices that are exported only to
+ * fail the request.
+ * - revealing devices that are imported by a client to
+ * another client.
+ */
+
reply.ndev = 0;
/* number of exported devices */
list_for_each(j, &driver->edev_list) {
- reply.ndev += 1;
+ edev = list_entry(j, struct usbip_exported_device, node);
+ if (edev->status != SDEV_ST_USED)
+ reply.ndev += 1;
}
info("exportable devices: %d", reply.ndev);
@@ -197,6 +208,9 @@ static int send_reply_devlist(int connfd)
list_for_each(j, &driver->edev_list) {
edev = list_entry(j, struct usbip_exported_device, node);
+ if (edev->status == SDEV_ST_USED)
+ continue;
+
dump_usb_device(&edev->udev);
memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
usbip_net_pack_usb_device(1, &pdu_udev);