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authorLars-Peter Clausen <lars@metafoo.de>2014-11-19 18:29:02 +0100
committerJiri Slaby <jslaby@suse.cz>2015-01-26 14:38:41 +0100
commite1d6f7ff9cd65f868066d9b17833fb82760209f4 (patch)
tree7fa0b0be44f9265364c75db4e4ac92210b15ae1b /sound
parent939c0896c85b324de081975d21b77b7678fff2af (diff)
ASoC: sigmadsp: Refuse to load firmware files with a non-supported version
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: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/sigmadsp.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/soc/codecs/sigmadsp.c b/sound/soc/codecs/sigmadsp.c
index 4068f2491232..bb3878c9625f 100644
--- a/sound/soc/codecs/sigmadsp.c
+++ b/sound/soc/codecs/sigmadsp.c
@@ -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);