[PATCH 4.15 107/128] media: davinci: vpif_capture: add NULL check on devm_kzalloc return value

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Gustavo A. R. Silva" <garsi...@embeddedor.com>


[ Upstream commit 5a18c2434f8bfc8bc2fb0f8af3e44f7408d63e4f ]

Check return value from call to devm_kzalloc() in order to prevent
a NULL pointer dereference.

This issue was detected with the help of Coccinelle.

Fixes: 4a5f8ae50b66 ("[media] davinci: vpif_capture: get subdevs from DT when 
available")

Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/media/platform/davinci/vpif_capture.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1550,6 +1550,8 @@ vpif_capture_get_pdata(struct platform_d
                                            sizeof(*chan->inputs) *
                                            VPIF_CAPTURE_NUM_CHANNELS,
                                            GFP_KERNEL);
+               if (!chan->inputs)
+                       return NULL;
 
                chan->input_count++;
                chan->inputs[i].input.type = V4L2_INPUT_TYPE_CAMERA;