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ASoC: sigmadsp: Refuse to load firmware files with a non-supported version

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commit 50c0f21b42dd4cd02b51f82274f66912d9a7fa32 upstream.

Make sure to check the version field of the firmware header to make sure to
not accidentally try to parse a firmware file with a different layout.
Trying to do so can result in loading invalid firmware code to the device.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lars-Peter Clausen 2014-11-19 18:29:02 +01:00 committed by Greg Kroah-Hartman
parent 68956d1e3a
commit c60c3ab7c6
1 changed files with 7 additions and 0 deletions
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7
sound/soc/codecs/sigmadsp.c
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@ -176,6 +176,13 @@ static int _process_sigma_firmware(struct device *dev,
goto done;
}
if (ssfw_head->version != 1) {
dev_err(dev,
"Failed to load firmware: Invalid version %d. Supported firmware versions: 1\n",
ssfw_head->version);
goto done;
}
crc = crc32(0, fw->data + sizeof(*ssfw_head),
fw->size - sizeof(*ssfw_head));
pr_debug("%s: crc=%x\n", __func__, crc);