From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: Clemens Ladisch <clemens@ladisch.de>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
"moderated list:SOUND" <alsa-devel@alsa-project.org>,
open list <linux-kernel@vger.kernel.org>
Subject: [PATCH] ALSA: usb-midi: fix a memory leak bug
Date: Tue, 6 Aug 2019 23:22:09 -0400 [thread overview]
Message-ID: <CAAa=b7ebEkQZhPCbJPK=dVC+cR8_pTE3OOxX+PV+MNx7-Y25Cw@mail.gmail.com> (raw)
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>
---
sound/usb/midi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index b737f0e..22db37f 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -2476,7 +2476,7 @@ int __snd_usbmidi_create(struct snd_card *card,
else
err = snd_usbmidi_create_endpoints(umidi, endpoints);
if (err < 0)
- goto exit;
+ goto free_midi;
usb_autopm_get_interface_no_resume(umidi->iface);
--
2.7.4
next reply other threads:[~2019-08-07 3:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-07 3:22 Wenwen Wang [this message]
2019-08-07 5:31 ` [PATCH] ALSA: usb-midi: fix a memory leak bug Takashi Iwai
2019-08-07 5:37 ` Wenwen Wang
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