From: Hillf Danton <hdanton@xxxxxxxx> [ Upstream commit 6d4472d7bec39917b54e4e80245784ea5d60ce49 ] 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: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/hid/usbhid/hiddev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c index c07df82923802..4e11cc6fc34bc 100644 --- a/drivers/hid/usbhid/hiddev.c +++ b/drivers/hid/usbhid/hiddev.c @@ -308,6 +308,10 @@ static int hiddev_open(struct inode *inode, struct file *file) 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); -- 2.20.1
