[PATCH 6.12 405/567] media: renesas: rcar_drif: fix device node reference leak in rcar_drif_bond_enabled

Greg Kroah-Hartman
2026-01-06T17:36:39Z

From: Miaoqian Lin <linmq006@gmail.com>

commit 445e1658894fd74eab7e53071fa16233887574ed upstream.

The function calls of_parse_phandle() which returns
a device node with an incremented reference count. When the bonded device
is not available, the function
returns NULL without releasing the reference, causing a reference leak.

Add of_node_put(np) to release the device node reference.
The of_node_put function handles NULL pointers.

Found through static analysis by reviewing the doc of of_parse_phandle()
and cross-checking its usage patterns across the codebase.

Fixes: 7625ee981af1 ("[media] media: platform: rcar_drif: Add DRIF support")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/media/platform/renesas/rcar_drif.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/media/platform/renesas/rcar_drif.c
+++ b/drivers/media/platform/renesas/rcar_drif.c
@@ -1249,6 +1249,7 @@ static struct device_node *rcar_drif_bon
if (np && of_device_is_available(np))
return np;

+ of_node_put(np);
return NULL;
}