From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
Shuah Khan <shuah@kernel.org>,
Richard Fontana <rfontana@redhat.com>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Thomas Gleixner <tglx@linutronix.de>,
"moderated list:SOUND" <alsa-devel@alsa-project.org>,
open list <linux-kernel@vger.kernel.org>
Subject: [PATCH] ALSA: usb-audio: fix a memory leak bug
Date: Tue, 6 Aug 2019 03:00:27 -0400 [thread overview]
Message-ID: <CAAa=b7f=SG6QR248JD9_VP89B=D2p3pdYcSAzRLchbJTpdXt_A@mail.gmail.com> (raw)
In snd_usb_get_audioformat_uac3(), a structure for channel maps 'chmap' is
allocated through kzalloc() before the execution goto 'found_clock'.
However, this structure is not deallocated if the memory allocation for
'pd' fails, leading to a memory leak bug.
To fix the above issue, free 'fp->chmap' before returning NULL.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
sound/usb/stream.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 7ee9d17..e852c7f 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -1043,6 +1043,7 @@ snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip,
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
+ kfree(fp->chmap);
kfree(fp->rate_table);
kfree(fp);
return NULL;
--
2.7.4
next reply other threads:[~2019-08-06 7:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 7:00 Wenwen Wang [this message]
2019-08-06 10:47 ` [PATCH] ALSA: usb-audio: fix a memory leak bug Takashi Iwai
-- strict thread matches above, loose matches on Subject: below --
2019-08-06 6:13 Wenwen Wang
2019-08-06 6:40 ` Takashi Iwai
2019-04-27 6:06 [PATCH] ALSA: usb-audio: Fix " Wenwen Wang
2019-04-28 7:12 ` Takashi Iwai
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