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ALSA: firewire-digi00x: fix memory leak of private data

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commit a49a83ab05e34edd6c71a4fbd062c9a7ba6d18aa upstream.

Although private data of sound card instance is usually allocated in the
tail of the instance, drivers in ALSA firewire stack allocate the private
data before allocating the instance. In this case, the private data
should be released explicitly at .private_free callback of the instance.

This commit fixes memory leak following to the above design.

Fixes: 86c8dd7f4da3 ('ALSA: firewire-digi00x: delayed registration of sound card')
Cc: <stable@vger.kernel.org> # v4.7+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Sakamoto 2018-09-13 21:30:34 +09:00 committed by Greg Kroah-Hartman
parent 70165a445b
commit 933f20a61e
1 changed files with 1 additions and 0 deletions
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sound/firewire/digi00x/digi00x.c
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@ -49,6 +49,7 @@ static void dg00x_free(struct snd_dg00x *dg00x)
fw_unit_put(dg00x->unit);
mutex_destroy(&dg00x->mutex);
kfree(dg00x);
}
static void dg00x_card_free(struct snd_card *card)