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ALSA: usb-audio: fix memory leak on cval 

With the current exit return path of the ctl_info allocation failure
cval is not being freed resulting in a memory leak. Fix this by kfree'ing
it on the return.

Detected by CoverityScan, CID#1466878 ("Resource Leak")

Fixes: 21e9b3e931 ("ALSA: usb-audio: fix uac control query argument")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Colin Ian King 2018-03-27 15:30:01 +01:00 committed by Takashi Iwai
parent f6d297df4d
commit 623760257b
1 changed files with 3 additions and 1 deletions
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4
sound/usb/mixer.c
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@ -1365,8 +1365,10 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
cval->cmask = ctl_mask;
ctl_info = get_feature_control_info(control);
if (!ctl_info)
if (!ctl_info) {
kfree(cval);
return;
}
if (state->mixer->protocol == UAC_VERSION_1)
cval->val_type = ctl_info->type;
else /* UAC_VERSION_2 */