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authorMengdong Lin <mengdong.lin@linux.intel.com>2016-04-27 14:52:56 +0800
committerMark Brown <broonie@kernel.org>2016-04-27 17:32:30 +0100
commit06eb49f72fa57f5a49acdf9f4af84d2d326513b3 (patch)
treed1ebb357f5a46bdbcc126d91b4e16184e39b5cc0
parent7de76b621f77aba456f594e4621eca2e94a146f3 (diff)
downloadblackbird-op-linux-06eb49f72fa57f5a49acdf9f4af84d2d326513b3.tar.gz
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ASoC: topology: Check size mismatch of ABI objects before parsing
If size mismatch of manifest, ABI headers or elements is found, stop parsing topology info and return the error. New fields may be append to the tail of ABI objects which will cause object size to increase. If user space and kernel use different versions of ABI, size mismatch will be detected here. Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--sound/soc/soc-topology.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 0224a6458f3b..29ae3d3a0f8a 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1023,6 +1023,11 @@ static int soc_tplg_kcontrol_elems_load(struct soc_tplg *tplg,
control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
+ if (control_hdr->size != sizeof(*control_hdr)) {
+ dev_err(tplg->dev, "ASoC: invalid control size\n");
+ return -EINVAL;
+ }
+
switch (control_hdr->ops.info) {
case SND_SOC_TPLG_CTL_VOLSW:
case SND_SOC_TPLG_CTL_STROBE:
@@ -1499,6 +1504,11 @@ static int soc_tplg_dapm_widget_elems_load(struct soc_tplg *tplg,
for (i = 0; i < count; i++) {
widget = (struct snd_soc_tplg_dapm_widget *) tplg->pos;
+ if (widget->size != sizeof(*widget)) {
+ dev_err(tplg->dev, "ASoC: invalid widget size\n");
+ return -EINVAL;
+ }
+
ret = soc_tplg_dapm_widget_create(tplg, widget);
if (ret < 0) {
dev_err(tplg->dev, "ASoC: failed to load widget %s\n",
@@ -1652,8 +1662,6 @@ static int soc_tplg_pcm_elems_load(struct soc_tplg *tplg,
if (tplg->pass != SOC_TPLG_PASS_PCM_DAI)
return 0;
- pcm = (struct snd_soc_tplg_pcm *)tplg->pos;
-
if (soc_tplg_check_elem_count(tplg,
sizeof(struct snd_soc_tplg_pcm), count,
hdr->payload_size, "PCM DAI")) {
@@ -1663,7 +1671,13 @@ static int soc_tplg_pcm_elems_load(struct soc_tplg *tplg,
}
/* create the FE DAIs and DAI links */
+ pcm = (struct snd_soc_tplg_pcm *)tplg->pos;
for (i = 0; i < count; i++) {
+ if (pcm->size != sizeof(*pcm)) {
+ dev_err(tplg->dev, "ASoC: invalid pcm size\n");
+ return -EINVAL;
+ }
+
soc_tplg_pcm_create(tplg, pcm);
pcm++;
}
@@ -1683,6 +1697,11 @@ static int soc_tplg_manifest_load(struct soc_tplg *tplg,
return 0;
manifest = (struct snd_soc_tplg_manifest *)tplg->pos;
+ if (manifest->size != sizeof(*manifest)) {
+ dev_err(tplg->dev, "ASoC: invalid manifest size\n");
+ return -EINVAL;
+ }
+
tplg->pos += sizeof(struct snd_soc_tplg_manifest);
if (tplg->comp && tplg->ops && tplg->ops->manifest)
@@ -1699,6 +1718,14 @@ static int soc_valid_header(struct soc_tplg *tplg,
if (soc_tplg_get_hdr_offset(tplg) >= tplg->fw->size)
return 0;
+ if (hdr->size != sizeof(*hdr)) {
+ dev_err(tplg->dev,
+ "ASoC: invalid header size for type %d at offset 0x%lx size 0x%zx.\n",
+ hdr->type, soc_tplg_get_hdr_offset(tplg),
+ tplg->fw->size);
+ return -EINVAL;
+ }
+
/* big endian firmware objects not supported atm */
if (hdr->magic == cpu_to_be32(SND_SOC_TPLG_MAGIC)) {
dev_err(tplg->dev,
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