v4l: soc_camera: fix bound checking of mbus_fmt[] index

Commit Message

Guennadi Liakhovetski Feb. 19, 2010, 5:26 p.m. UTC

None

Patch

diff --git a/drivers/media/video/soc_mediabus.c b/drivers/media/video/soc_mediabus.c
index f8d5c87..a4c0ef4 100644
--- a/drivers/media/video/soc_mediabus.c
+++ b/drivers/media/video/soc_mediabus.c
@@ -134,7 +134,8 @@  EXPORT_SYMBOL(soc_mbus_bytes_per_line);
 const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
 	enum v4l2_mbus_pixelcode code)
 {
-	if ((unsigned int)(code - V4L2_MBUS_FMT_FIXED) > ARRAY_SIZE(mbus_fmt))
+	if (code - V4L2_MBUS_FMT_FIXED > ARRAY_SIZE(mbus_fmt) ||
+	    code <= V4L2_MBUS_FMT_FIXED)
 		return NULL;
 	return mbus_fmt + code - V4L2_MBUS_FMT_FIXED - 1;
 }