5.10-stable review patch. If anyone has any objections, please let me know.
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From: Hans Verkuil hverkuil-cisco@xs4all.nl
[ Upstream commit 17763960b1784578e8fe915304b330922f646209 ]
When setting the EDID it would attempt to update two controls that are only present if there is an HDMI output configured.
If there isn't any (e.g. when the vivid module is loaded with node_types=1), then calling VIDIOC_S_EDID would crash.
Fix this by first checking if outputs are present.
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/test-drivers/vivid/vivid-vid-cap.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/media/test-drivers/vivid/vivid-vid-cap.c b/drivers/media/test-drivers/vivid/vivid-vid-cap.c index 907781c2e613..2ce7f5567f51 100644 --- a/drivers/media/test-drivers/vivid/vivid-vid-cap.c +++ b/drivers/media/test-drivers/vivid/vivid-vid-cap.c @@ -1802,8 +1802,10 @@ int vidioc_s_edid(struct file *file, void *_fh, return -EINVAL; if (edid->blocks == 0) { dev->edid_blocks = 0; - v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, 0); - v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, 0); + if (dev->num_outputs) { + v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, 0); + v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, 0); + } phys_addr = CEC_PHYS_ADDR_INVALID; goto set_phys_addr; } @@ -1827,8 +1829,10 @@ int vidioc_s_edid(struct file *file, void *_fh, display_present |= dev->display_present[i] << j++;
- v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, display_present); - v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, display_present); + if (dev->num_outputs) { + v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, display_present); + v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, display_present); + }
set_phys_addr: /* TODO: a proper hotplug detect cycle should be emulated here */