From: Hillf Danton hdanton@sina.com
[ Upstream commit 6d4472d7bec39917b54e4e80245784ea5d60ce49 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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);