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ASoC: SOF: ipc4-loader: Verify ext manifest magic number

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Firmware image must start with an extended manifest. Add a check to make
sure that the image does contain it.

The magic number (the first u32 of a firmware image if manifest is present)
for an IPC4 image must be 0x31454124 (ASCI "$AE1").

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220823124219.927-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2022-08-23 15:42:19 +03:00 committed by Mark Brown
parent 1332d2078a
commit a337c20127
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GPG Key ID: 24D68B725D5487D0
1 changed files with 11 additions and 0 deletions
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11
sound/soc/sof/ipc4-loader.c
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@ -40,6 +40,17 @@ static size_t sof_ipc4_fw_parse_ext_man(struct snd_sof_dev *sdev)
ext_man_hdr = (struct sof_ext_manifest4_hdr *)fw->data;
/*
* At the start of the firmware image we must have an extended manifest.
* Verify that the magic number is correct.
*/
if (ext_man_hdr->id != SOF_EXT_MAN4_MAGIC_NUMBER) {
dev_err(sdev->dev,
"Unexpected extended manifest magic number: %#x\n",
ext_man_hdr->id);
return -EINVAL;
}
fw_hdr_offset = ipc4_data->manifest_fw_hdr_offset;
if (!fw_hdr_offset)
return -EINVAL;