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| author |   Wenwen Wang <wang6495@umn.edu> | 2019-04-27 01:06:46 -0500 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2019-04-28 09:11:50 +0200 |
| commit | cb5173594d50c72b7bfa14113dfc5084b4d2f726 (patch) | |
| tree | 7c1d80452f789d9024b4e2966236812fdc1bfb6b /sound/usb/mixer.c | |
| parent | ALSA: gus: fix misuse of %x (diff) | |
| download | linux-dev-cb5173594d50c72b7bfa14113dfc5084b4d2f726.tar.xz linux-dev-cb5173594d50c72b7bfa14113dfc5084b4d2f726.zip | |
ALSA: usb-audio: Fix a memory leak bug
In parse_audio_selector_unit(), the string array 'namelist' is allocated
through kmalloc_array(), and each string pointer in this array, i.e.,
'namelist[]', is allocated through kmalloc() in the following for loop.
Then, a control instance 'kctl' is created by invoking snd_ctl_new1(). If
an error occurs during the creation process, the string array 'namelist',
including all string pointers in the array 'namelist[]', should be freed,
before the error code ENOMEM is returned. However, the current code does
not free 'namelist[]', resulting in memory leaks.
To fix the above issue, free all string pointers 'namelist[]' in a loop.
Signed-off-by: Wenwen Wang <wang6495@umn.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/mixer.c')
| -rw-r--r-- | sound/usb/mixer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index c095d9751924..e003b5e7b01a 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2675,6 +2675,8 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); if (! kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); + for (i = 0; i < desc->bNrInPins; i++) + kfree(namelist[i]); kfree(namelist); kfree(cval); return -ENOMEM; |