[PATCH 2/6] ASoC: topology: Add header payload_size verification

[Cezary Rojewski]

Add sanity check to make sure the data is read within file boundary.
Helps in situations where file is only partially copied or malformed.

Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---
 sound/soc/soc-topology.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 88f849b119da..2484de8fd79a 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -2438,6 +2438,7 @@ static int soc_tplg_manifest_load(struct soc_tplg *tplg,
 		_manifest = manifest;
 	} else {
 		abi_match = false;
+
 		ret = manifest_new_ver(tplg, manifest, &_manifest);
 		if (ret < 0)
 			return ret;
@@ -2468,6 +2469,14 @@ static int soc_valid_header(struct soc_tplg *tplg,
 		return -EINVAL;
 	}
 
+	if (soc_tplg_get_hdr_offset(tplg) + hdr->payload_size >= tplg->fw->size) {
+		dev_err(tplg->dev,
+			"ASoC: invalid header of type %d at offset %ld payload_size %d\n",
+			le32_to_cpu(hdr->type), soc_tplg_get_hdr_offset(tplg),
+			hdr->payload_size);
+		return -EINVAL;
+	}
+
 	/* big endian firmware objects not supported atm */
 	if (le32_to_cpu(hdr->magic) == SOC_TPLG_MAGIC_BIG_ENDIAN) {
 		dev_err(tplg->dev,
-- 
2.25.1