[PATCH 4.16 032/196] media: vivid: check if the cec_adapter is valid

From: Greg Kroah-Hartman
Date: Sun Apr 22 2018 - 12:12:27 EST


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

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

From: Hans Verkuil <hverkuil@xxxxxxxxx>

commit ed356f110403f6acc64dcbbbfdc38662ab9b06c2 upstream.

If CEC is not enabled for the vivid driver, then the adap pointer is NULL
and 'adap->phys_addr' will fail.

Cc: <stable@xxxxxxxxxxxxxxx> # for v4.12 and up
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/media/platform/vivid/vivid-vid-common.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -874,7 +874,8 @@ int vidioc_g_edid(struct file *file, voi
return -EINVAL;
if (edid->start_block + edid->blocks > dev->edid_blocks)
edid->blocks = dev->edid_blocks - edid->start_block;
- cec_set_edid_phys_addr(dev->edid, dev->edid_blocks * 128, adap->phys_addr);
+ if (adap)
+ cec_set_edid_phys_addr(dev->edid, dev->edid_blocks * 128, adap->phys_addr);
memcpy(edid->edid, dev->edid + edid->start_block * 128, edid->blocks * 128);
return 0;
}