From: Hillf Danton hdanton@sina.com
commit 6d4472d7bec39917b54e4e80245784ea5d60ce49 upstream.
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: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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);