Regression fix:
V4L2_PIX_FMT_PRIV_MAGIC should only be set for the VIDEO_CAPTURE and
VIDEO_OUTPUT buffer types, and not for any others. In the case of
the win format this overwrote a pointer value that is passed in from
userspace.
Just set it for V4L2_BUF_TYPE_VIDEO_CAPTURE and OUTPUT only. Also set
it before the callback is called, just as is done for try/s_fmt.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
b/drivers/media/v4l2-core/v4l2-ioctl.c
index e620387..22c8d48 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1143,8 +1143,6 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
int ret;
- p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
-
/*
* fmt can't be cleared for these overlay types due to the 'clips'
* 'clipcount' and 'bitmap' pointers in struct v4l2_window.
@@ -1164,6 +1162,15 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
p->fmt.win.bitmap = bitmap;
break;
}
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ memset(&p->fmt, 0, sizeof(p->fmt));
+ /*
+ * Fill in the priv field to signal that the extended
+ * v4l2_pix_format fields are valid.
+ */
+ p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
+ break;
default:
memset(&p->fmt, 0, sizeof(p->fmt));
break;
@@ -1174,6 +1181,7 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
break;
ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
+ /* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
@@ -1196,6 +1204,7 @@ static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
break;
ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
+ /* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
--
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