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Subject[PATCH] of: overlay: fix memory leak related to duplicated property
Date
From: alawang <alan.1.wang@nokia-sbell.com>

Hello,

Sorry It was my fault in last email that wrote the wrong subject and sign off name.
Correct them this time.
Thanks

Function of_changeset_add_property or of_changeset_update_property may
fails. In this case the property just allocated is never deallocated.

Signed-off-by: Lixin Wang <alan.1.wang@nokia-sbell.com>
---
drivers/of/overlay.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 8ecfee3..af3b9a1 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -162,6 +162,7 @@ static int of_overlay_apply_single_property(struct of_overlay *ov,
bool is_symbols_node)
{
struct property *propn = NULL, *tprop;
+ int ret = 0;

/* NOTE: Multiple changes of single properties not supported */
tprop = of_find_property(target, prop->name, NULL);
@@ -186,10 +187,16 @@ static int of_overlay_apply_single_property(struct of_overlay *ov,

/* not found? add */
if (tprop == NULL)
- return of_changeset_add_property(&ov->cset, target, propn);
-
- /* found? update */
- return of_changeset_update_property(&ov->cset, target, propn);
+ ret = of_changeset_add_property(&ov->cset, target, propn);
+ else /* found? update */
+ ret = of_changeset_update_property(&ov->cset, target, propn);
+
+ if (ret) {
+ kfree(propn->name);
+ kfree(propn->value);
+ kfree(propn);
+ }
+ return ret;
}

static int of_overlay_apply_single_device_node(struct of_overlay *ov,
--
2.6.2
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