From: Peter Ujfalusi Date: Wed, 15 Sep 2021 12:21:08 +0000 (+0300) Subject: ASoC: SOF: imx: imx8: Bar index is only valid for IRAM and SRAM types X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=10d93a98190aec2c3ff98d9472ab1bf0543aa02c;p=uclinux-h8%2Flinux.git ASoC: SOF: imx: imx8: Bar index is only valid for IRAM and SRAM types 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: 202acc565a1f0 ("ASoC: SOF: imx: Add i.MX8 HW support") Signed-off-by: Peter Ujfalusi Reviewed-by: Daniel Baluta Reviewed-by: Ranjani Sridharan Reviewed-by: Guennadi Liakhovetski Link: https://lore.kernel.org/r/20210915122116.18317-5-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/sof/imx/imx8.c b/sound/soc/sof/imx/imx8.c index 12fedf0984bd..7e9723a10d02 100644 --- a/sound/soc/sof/imx/imx8.c +++ b/sound/soc/sof/imx/imx8.c @@ -365,7 +365,14 @@ static int imx8_remove(struct snd_sof_dev *sdev) /* on i.MX8 there is 1 to 1 match between type and BAR idx */ static int imx8_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 imx8_ipc_msg_data(struct snd_sof_dev *sdev,