[alsa-devel] [PATCH 0/2] ALSA: dice: fix a fatal bug when no sound card is registered

[Takashi Iwai]

On Mon, 28 Mar 2016 01:14:51 +0200,
Takashi Sakamoto wrote:
> 
> Hi,
> 
> On Mar 26 2016 21:05, Takashi Sakamoto wrote:
> > Hi,
> > 
> > This patchset is for Linux 4.6-rc2.
> > 
> > ALSA dice driver causes kernel NULL pointer dereference in a case that
> > no sound card instance is registered and unit is going to be removed.
> > This is observed when dice-based units are connected to Linux system and
> > disconnected within 2 seconds, thus it's rare.
> > 
> > Additionally, even if the bug is fixed, the driver dumps warnings for
> > most dice-based models which supports a pair of isochronous streams.
> > This can occur regardless of the former bug. Users can see this for
> > unsupported dice-based models.
> > 
> > This patchset fixes these bugs.
> 
> I realized that this patchset is not proper to Linux 4.6-rc2. The stream
> data is confirmed to initialized in unit probe callback, and safely
> released when releasing private data. I worked on the other branch and
> had a confusion. So please drop this.
> 
> However, current ALSA dice driver has a bug not to release stream data
> when releasing private data. This causes memory leak and should be fixed
> in 4.6-rc2. I'll post a patch for the bug soon.

So, I don't need to pick up this patchset after applying your fix
([PATCH v2] ALSA: dice: fix memory leak when unplugging)?


thanks,

Takashi