• Dan Carpenter's avatar
    ALSA: off by one bug in snd_riptide_joystick_probe() · e4940626
    Dan Carpenter authored
    The problem here is that we check:
    
    	if (dev >= SNDRV_CARDS)
    
    Then we increment "dev".
    
           if (!joystick_port[dev++])
    
    Then we use it as an offset into a array with SNDRV_CARDS elements.
    
    	if (!request_region(joystick_port[dev], 8, "Riptide gameport")) {
    
    This has 3 effects:
    1) If you use the module option to specify the joystick port then it has
       to be shifted one space over.
    2) The wrong error message will be printed on failure if you have over
       32 cards.
    3) Static checkers will correctly complain that are off by one.
    
    Fixes: db1005ec ('ALSA: riptide - Fix joystick resource handling')
    Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    e4940626
riptide.c 63 KB