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ASoC: msm-pcm-host-voice: Address buffer overflow in hpcm playback copy

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Add buf len check for the playback data before copy
to avoid OOB issues.

Change-Id: I737d09e275463292365cd183b9a43d09ff9ccbf2
Signed-off-by: Soumya Managoli <quic_c_smanag@quicinc.com>
This commit is contained in:
Soumya Managoli 2023-05-25 11:20:59 +05:30
commit e21e857f42
1 changed files with 9 additions and 2 deletions
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11
asoc/msm-pcm-host-voice-v2.c
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@ -663,6 +663,13 @@ static void hpcm_copy_playback_data_from_queue(struct dai_data *dai_data,
struct hpcm_buf_node, list);
list_del(&buf_node->list);
*len = buf_node->frame.len;
if (*len > HPCM_MAX_VOC_PKT_SIZE) {
pr_err("%s: Playback data len %d overflow\n",
__func__, *len);
return;
}
memcpy((u8 *)dai_data->vocpcm_ion_buffer.kvaddr,
&buf_node->frame.voc_pkt[0],
buf_node->frame.len);
@ -690,8 +697,8 @@ static void hpcm_copy_capture_data_to_queue(struct dai_data *dai_data,
if (dai_data->substream == NULL)
return;
if (len >= HPCM_MAX_VOC_PKT_SIZE) {
pr_err("%s: Copy capture data len %d is > HPCM_MAX_VOC_PKT_SIZE\n",
if (len > HPCM_MAX_VOC_PKT_SIZE) {
pr_err("%s: Copy capture data len %d overflow\n",
__func__, len);
return;
}