• Takashi Iwai's avatar
    ALSA: oss: Use kvzalloc() for local buffer allocations · 65766ee0
    Takashi Iwai authored
    PCM OSS layer may allocate a few temporary buffers, one for the core
    read/write and another for the conversions via plugins.  Currently
    both are allocated via vmalloc().  But as the allocation size is
    equivalent with the PCM period size, the required size might be quite
    small, depending on the application.
    
    This patch replaces these vmalloc() calls with kvzalloc() for covering
    small period sizes better.  Also, we use "z"-alloc variant here for
    addressing the possible uninitialized access reported by syzkaller.
    
    Reported-by: syzbot+1cb36954e127c98dd037@syzkaller.appspotmail.com
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    65766ee0
pcm_oss.c 86.9 KB