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ALSA: usb-audio: fix a memory leak bug 

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.

Fixes: 7edf3b5e6a ("ALSA: usb-audio: AudioStreaming Power Domain parsing")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wenwen Wang 2019-08-06 03:00:27 -04:00 committed by Takashi Iwai
parent d1d0330665
commit a67060201b
1 changed files with 1 additions and 0 deletions
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sound/usb/stream.c
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@ -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;