[next] ASoC: topology: fix memory leak on se when kstrdup fails

Commit Message

Colin King March 28, 2018, 6:17 p.m. UTC

From: Colin Ian King <[e-mail]>

In the case when kstrdup fails to allocation memory for kc[i].name
the error exit path does not free up 'se' leading to a small leak.
Fix this by kfree'ing 'se' before jumping to err_se and since
kc[i].private_value is zero we end up avoiding kfree'ing the
rest of the unallocated objects in se.

Detected by CoverityScan, CID#1466991 ("Reseource leak")

Fixes: 267e2c6fd7ca ("ASoC: topology: Fix kcontrol name string handling")
Signed-off-by: Colin Ian King <[e-mail]>
---
 sound/soc/soc-topology.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index fa27d0fca6dc..71b20d795b51 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1325,8 +1325,10 @@  static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
 			ec->hdr.name);
 
 		kc[i].name = kstrdup(ec->hdr.name, GFP_KERNEL);
-		if (kc[i].name == NULL)
+		if (kc[i].name == NULL) {
+			kfree(se);
 			goto err_se;
+		}
 		kc[i].private_value = (long)se;
 		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
 		kc[i].access = ec->hdr.access;