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-rw-r--r--drivers/hid/usbhid/hiddev.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 55b72573066b..c07df8292380 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -284,6 +284,14 @@ static int hiddev_open(struct inode *inode, struct file *file)
spin_unlock_irq(&list->hiddev->list_lock);
mutex_lock(&hiddev->existancelock);
+ /*
+ * recheck exist with existance lock held to
+ * avoid opening a disconnected device
+ */
+ if (!list->hiddev->exist) {
+ res = -ENODEV;
+ goto bail_unlock;
+ }
if (!list->hiddev->open++)
if (list->hiddev->exist) {
struct hid_device *hid = hiddev->hid;