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From: Takashi Iwai <tiwai@suse.de>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: "moderated list:SOUND" <alsa-devel@alsa-project.org>,
	Clemens Ladisch <clemens@ladisch.de>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ALSA: usb-midi: fix a memory leak bug
Date: Wed, 07 Aug 2019 07:31:47 +0200	[thread overview]
Message-ID: <s5hef1xo81o.wl-tiwai@suse.de> (raw)
In-Reply-To: <CAAa=b7ebEkQZhPCbJPK=dVC+cR8_pTE3OOxX+PV+MNx7-Y25Cw@mail.gmail.com>

On Wed, 07 Aug 2019 05:22:09 +0200,
Wenwen Wang wrote:
> 
> In __snd_usbmidi_create(), a MIDI streaming interface structure is
> allocated through kzalloc() and the pointer is saved to 'umidi'. Later on,
> the endpoint structures are created by invoking
> snd_usbmidi_create_endpoints_midiman() or snd_usbmidi_create_endpoints(),
> depending on the type of the audio quirk type. However, if the creation
> fails, the allocated 'umidi' is not deallocated, leading to a memory leak
> bug.
> 
> To fix the above issue, free 'umidi' before returning the error.
> 
> Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>

It's again a false-positive report.  The object is released
automatically by the destructor of its base snd_rawmidi object.


thanks,

Takashi

  reply	other threads:[~2019-08-07  5:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-07  3:22 Wenwen Wang
2019-08-07  5:31 ` Takashi Iwai [this message]
2019-08-07  5:37   ` Wenwen Wang

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