From: Hillf Danton <hdanton@xxxxxxxx> commit 6d4472d7bec39917b54e4e80245784ea5d60ce49 upstream. Undo what we did for opening before releasing the memory slice. Reported-by: syzbot <syzbot+62a1e04fd3ec2abf099e@xxxxxxxxxxxxxxxxxxxxxxxxx> Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Signed-off-by: Hillf Danton <hdanton@xxxxxxxx> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/hid/usbhid/hiddev.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/hid/usbhid/hiddev.c +++ b/drivers/hid/usbhid/hiddev.c @@ -330,6 +330,10 @@ static int hiddev_open(struct inode *ino return 0; 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);
