From: Peter Ujfalusi peter.ujfalusi@linux.intel.com
stable inclusion from stable-v5.10.142 commit ddcb56e84130fac7d73f7473afc673f14a339cf2 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6CSFH
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 2e6481a3f3ee6234ce577454e1d88aca55f51d47 ]
The struct nhlt_format's fmt_config is a flexible array, it must not be used as normal array. When moving to the next nhlt_fmt_cfg we need to take into account the data behind the ->config.caps (indicated by ->config.size).
Fixes: a864e8f159b13 ("ALSA: hda: intel-nhlt: verify config type") Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Jaska Uimonen jaska.uimonen@linux.intel.com Link: https://lore.kernel.org/r/20220823122405.18464-1-peter.ujfalusi@linux.intel.... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Jialin Zhang zhangjialin11@huawei.com Reviewed-by: Zheng Zengkai zhengzengkai@huawei.com --- sound/hda/intel-nhlt.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c index 5e04fedaec49..8714891f50b0 100644 --- a/sound/hda/intel-nhlt.c +++ b/sound/hda/intel-nhlt.c @@ -55,16 +55,22 @@ int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
/* find max number of channels based on format_configuration */ if (fmt_configs->fmt_count) { + struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config; + dev_dbg(dev, "found %d format definitions\n", fmt_configs->fmt_count);
for (i = 0; i < fmt_configs->fmt_count; i++) { struct wav_fmt_ext *fmt_ext;
- fmt_ext = &fmt_configs->fmt_config[i].fmt_ext; + fmt_ext = &fmt_cfg->fmt_ext;
if (fmt_ext->fmt.channels > max_ch) max_ch = fmt_ext->fmt.channels; + + /* Move to the next nhlt_fmt_cfg */ + fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps + + fmt_cfg->config.size); } dev_dbg(dev, "max channels found %d\n", max_ch); } else {