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ASoC: SOF: imx: imx8m: Bar index is only valid for IRAM and SRAM types

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i.MX8 only uses SOF_FW_BLK_TYPE_IRAM (1) and SOF_FW_BLK_TYPE_SRAM (3)
bars, everything else is left as 0 in sdev->bar[] array.

If a broken or purposefully crafted firmware image is loaded with other
types of FW_BLK_TYPE then a kernel crash can be triggered.

Make sure that only IRAM/SRAM type is converted to bar index.

Fixes: afb93d7165 ("ASoC: SOF: imx: Add i.MX8M HW support")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20210915122116.18317-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2021-09-15 15:21:09 +03:00 committed by Mark Brown
parent 10d93a9819
commit d9be4a88c3
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 8 additions and 1 deletions
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9
sound/soc/sof/imx/imx8m.c
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@ -228,7 +228,14 @@ static int imx8m_remove(struct snd_sof_dev *sdev)
/* on i.MX8 there is 1 to 1 match between type and BAR idx */
static int imx8m_get_bar_index(struct snd_sof_dev *sdev, u32 type)
{
return type;
/* Only IRAM and SRAM bars are valid */
switch (type) {
case SOF_FW_BLK_TYPE_IRAM:
case SOF_FW_BLK_TYPE_SRAM:
return type;
default:
return -EINVAL;
}
}
static void imx8m_ipc_msg_data(struct snd_sof_dev *sdev,