HID: hiddev: do cleanup in failure of opening a device

Undo what we did for opening before releasing the memory slice.

Reported-by: syzbot <syzbot+62a1e04fd3ec2abf099e@syzkaller.appspotmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index c07df82923802473051e168c0e685aaef5346ef9..4e11cc6fc34bc68afc856a20315e0092ed8f97c7 100644 (file)
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -308,6 +308,10 @@ bail_normal_power:
        hid_hw_power(hid, PM_HINT_NORMAL);
 bail_unlock:
        mutex_unlock(&hiddev->existancelock);
+
+       spin_lock_irq(&list->hiddev->list_lock);
+       list_del(&list->node);
+       spin_unlock_irq(&list->hiddev->list_lock);
 bail:
        file->private_data = NULL;
        vfree(list);