[RAMEN9610-21380]HID: hiddev: do cleanup in failure of opening a device

commit 6d4472d7bec39917b54e4e80245784ea5d60ce49 upstream.

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

Change-Id: I0af2538257801d16761dd60e5eaeeb448e6a7aa4
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 5e1361dfb61cdde69bd20a426a39fbc72ca1569e..ce342fd0457e9e81f11f631a0b54af3691896a5a 100644 (file)
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -321,6 +321,10 @@ 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);