[PATCH 4.4 37/78] ALSA: hda - Fix a memory leak bug

Greg Kroah-Hartman
2019-08-22T17:23:10Z

From: Wenwen Wang <wenwen@cs.uga.edu>

commit cfef67f016e4c00a2f423256fc678a6967a9fc09 upstream.

In snd_hda_parse_generic_codec(), 'spec' is allocated through kzalloc().
Then, the pin widgets in 'codec' are parsed. However, if the parsing
process fails, 'spec' is not deallocated, leading to a memory leak.

To fix the above issue, free 'spec' before returning the error.

Fixes: 352f7f914ebb ("ALSA: hda - Merge Realtek parser code to generic parser")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
sound/pci/hda/hda_generic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -5917,7 +5917,7 @@ static int snd_hda_parse_generic_codec(s

err = snd_hda_parse_pin_defcfg(codec, &spec->autocfg, NULL, 0);
if (err < 0)
- return err;
+ goto error;

err = snd_hda_gen_parse_auto_config(codec, &spec->autocfg);
if (err < 0)