LinuxTV Patchwork [v5,13/23] media: vicodec: Validate version dependent header values in a separate function

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Submitter Dafna Hirschfeld
Date March 6, 2019, 9:13 p.m.
Message ID <20190306211343.15302-14-dafna3@gmail.com>
Download mbox | patch
Permalink /patch/54902/
State Under Review
Delegated to: Hans Verkuil
Headers show

Comments

Dafna Hirschfeld - March 6, 2019, 9:13 p.m.
Move the code that validates version dependent header
values to a separate function 'validate_by_version'

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
 drivers/media/platform/vicodec/vicodec-core.c | 31 ++++++++++++-------
 1 file changed, 19 insertions(+), 12 deletions(-)

Patch

diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
index 4b97ba30fec3..d051f9901409 100644
--- a/drivers/media/platform/vicodec/vicodec-core.c
+++ b/drivers/media/platform/vicodec/vicodec-core.c
@@ -191,6 +191,23 @@  static void copy_cap_to_ref(const u8 *cap, const struct v4l2_fwht_pixfmt_info *i
 	}
 }
 
+static bool validate_by_version(unsigned int flags, unsigned int version)
+{
+	if (!version || version > FWHT_VERSION)
+		return false;
+
+	if (version >= 2) {
+		unsigned int components_num = 1 +
+			((flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
+			 FWHT_FL_COMPONENTS_NUM_OFFSET);
+		unsigned int pixenc = flags & FWHT_FL_PIXENC_MSK;
+
+		if (components_num == 0 || components_num > 4 || !pixenc)
+			return false;
+	}
+	return true;
+}
+
 static int device_process(struct vicodec_ctx *ctx,
 			  struct vb2_v4l2_buffer *src_vb,
 			  struct vb2_v4l2_buffer *dst_vb)
@@ -397,21 +414,11 @@  static bool is_header_valid(const struct fwht_cframe_hdr *p_hdr)
 	unsigned int version = ntohl(p_hdr->version);
 	unsigned int flags = ntohl(p_hdr->flags);
 
-	if (!version || version > FWHT_VERSION)
-		return false;
-
 	if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT)
 		return false;
 
-	if (version >= 2) {
-		unsigned int components_num = 1 +
-			((flags & FWHT_FL_COMPONENTS_NUM_MSK) >>
-			FWHT_FL_COMPONENTS_NUM_OFFSET);
-		unsigned int pixenc = flags & FWHT_FL_PIXENC_MSK;
-
-		if (components_num == 0 || components_num > 4 || !pixenc)
-			return false;
-	}
+	if (!validate_by_version(flags, version))
+		return false;
 
 	info = info_from_header(p_hdr);
 	if (!info)

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