We should have a limited trust in the BIOS and verify that the SSP index reported in NHLT is valid for each platform.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com --- sound/soc/sof/intel/hda.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c index d337d55050e2..8639ea63a10d 100644 --- a/sound/soc/sof/intel/hda.c +++ b/sound/soc/sof/intel/hda.c @@ -1527,6 +1527,7 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev) if (tplg_fixup && mach->tplg_quirk_mask & SND_SOC_ACPI_TPLG_INTEL_SSP_NUMBER && mach->mach_params.i2s_link_mask) { + const struct sof_intel_dsp_desc *chip = get_chip_info(sdev->pdata); int ssp_num;
if (hweight_long(mach->mach_params.i2s_link_mask) > 1 && @@ -1536,6 +1537,12 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev) /* fls returns 1-based results, SSPs indices are 0-based */ ssp_num = fls(mach->mach_params.i2s_link_mask) - 1;
+ if (ssp_num >= chip->ssp_count) { + dev_err(sdev->dev, "Invalid SSP %d, max on this platform is %d\n", + ssp_num, chip->ssp_count); + return NULL; + } + tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL, "%s%s%d", sof_pdata->tplg_filename,