[PATCH v3 1/1] mtk-vcodec: check the vp9 decoder buffer index from VPU.
Wu-Cheng Li
wuchengli at chromium.org
Tue Mar 7 19:40:58 PST 2017
From: Wu-Cheng Li <wuchengli at google.com>
VPU firmware has a bug and may return invalid buffer index for
some vp9 videos. Check the buffer indexes before accessing the
buffer.
Signed-off-by: Wu-Cheng Li <wuchengli at chromium.org>
---
drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c | 33 +++++++++++++++++-----
drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.h | 2 ++
.../media/platform/mtk-vcodec/vdec/vdec_vp9_if.c | 26 +++++++++++++++++
drivers/media/platform/mtk-vcodec/vdec_drv_if.h | 2 ++
4 files changed, 56 insertions(+), 7 deletions(-)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
index 502877a4b1df..a60b538686ea 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
@@ -420,6 +420,11 @@ static void mtk_vdec_worker(struct work_struct *work)
dst_buf->index,
ret, res_chg);
src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
+ if (ret == -EIO) {
+ mutex_lock(&ctx->lock);
+ src_buf_info->error = true;
+ mutex_unlock(&ctx->lock);
+ }
v4l2_m2m_buf_done(&src_buf_info->vb, VB2_BUF_STATE_ERROR);
} else if (res_chg == false) {
/*
@@ -1170,8 +1175,16 @@ static void vb2ops_vdec_buf_queue(struct vb2_buffer *vb)
*/
src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
- v4l2_m2m_buf_done(to_vb2_v4l2_buffer(src_buf),
- VB2_BUF_STATE_DONE);
+ if (ret == -EIO) {
+ mtk_v4l2_err("[%d] Unrecoverable error in vdec_if_decode.",
+ ctx->id);
+ ctx->state = MTK_STATE_ABORT;
+ v4l2_m2m_buf_done(to_vb2_v4l2_buffer(src_buf),
+ VB2_BUF_STATE_ERROR);
+ } else {
+ v4l2_m2m_buf_done(to_vb2_v4l2_buffer(src_buf),
+ VB2_BUF_STATE_DONE);
+ }
mtk_v4l2_debug(ret ? 0 : 1,
"[%d] vdec_if_decode() src_buf=%d, size=%zu, fail=%d, res_chg=%d",
ctx->id, src_buf->index,
@@ -1216,16 +1229,22 @@ static void vb2ops_vdec_buf_finish(struct vb2_buffer *vb)
struct mtk_vcodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vb2_v4l2;
struct mtk_video_dec_buf *buf;
-
- if (vb->vb2_queue->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
- return;
+ bool buf_error;
vb2_v4l2 = container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
buf = container_of(vb2_v4l2, struct mtk_video_dec_buf, vb);
mutex_lock(&ctx->lock);
- buf->queued_in_v4l2 = false;
- buf->queued_in_vb2 = false;
+ if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
+ buf->queued_in_v4l2 = false;
+ buf->queued_in_vb2 = false;
+ }
+ buf_error = buf->error;
mutex_unlock(&ctx->lock);
+
+ if (buf_error) {
+ mtk_v4l2_err("Unrecoverable error on buffer.");
+ ctx->state = MTK_STATE_ABORT;
+ }
}
static int vb2ops_vdec_buf_init(struct vb2_buffer *vb)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.h
index 362f5a85762e..dc4fc1df63c5 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.h
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.h
@@ -50,6 +50,7 @@ struct vdec_fb {
* @queued_in_v4l2: Capture buffer is in v4l2 driver, but not in vb2
* queue yet
* @lastframe: Intput buffer is last buffer - EOS
+ * @error: An unrecoverable error occurs on this buffer.
* @frame_buffer: Decode status, and buffer information of Capture buffer
*
* Note : These status information help us track and debug buffer state
@@ -63,6 +64,7 @@ struct mtk_video_dec_buf {
bool queued_in_vb2;
bool queued_in_v4l2;
bool lastframe;
+ bool error;
struct vdec_fb frame_buffer;
};
diff --git a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
index e91a3b425b0c..5539b1853f16 100644
--- a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
+++ b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
@@ -718,6 +718,26 @@ static void get_free_fb(struct vdec_vp9_inst *inst, struct vdec_fb **out_fb)
*out_fb = fb;
}
+static int validate_vsi_array_indexes(struct vdec_vp9_inst *inst,
+ struct vdec_vp9_vsi *vsi) {
+ if (vsi->sf_frm_idx >= VP9_MAX_FRM_BUF_NUM - 1) {
+ mtk_vcodec_err(inst, "Invalid vsi->sf_frm_idx=%u.",
+ vsi->sf_frm_idx);
+ return -EIO;
+ }
+ if (vsi->frm_to_show_idx >= VP9_MAX_FRM_BUF_NUM) {
+ mtk_vcodec_err(inst, "Invalid vsi->frm_to_show_idx=%u.",
+ vsi->frm_to_show_idx);
+ return -EIO;
+ }
+ if (vsi->new_fb_idx >= VP9_MAX_FRM_BUF_NUM) {
+ mtk_vcodec_err(inst, "Invalid vsi->new_fb_idx=%u.",
+ vsi->new_fb_idx);
+ return -EIO;
+ }
+ return 0;
+}
+
static void vdec_vp9_deinit(unsigned long h_vdec)
{
struct vdec_vp9_inst *inst = (struct vdec_vp9_inst *)h_vdec;
@@ -834,6 +854,12 @@ static int vdec_vp9_decode(unsigned long h_vdec, struct mtk_vcodec_mem *bs,
goto DECODE_ERROR;
}
+ ret = validate_vsi_array_indexes(inst, vsi);
+ if (ret) {
+ mtk_vcodec_err(inst, "Invalid values from VPU.");
+ goto DECODE_ERROR;
+ }
+
if (vsi->resolution_changed) {
if (!vp9_alloc_work_buf(inst)) {
ret = -EINVAL;
diff --git a/drivers/media/platform/mtk-vcodec/vdec_drv_if.h b/drivers/media/platform/mtk-vcodec/vdec_drv_if.h
index db6b5205ffb1..ded1154481cd 100644
--- a/drivers/media/platform/mtk-vcodec/vdec_drv_if.h
+++ b/drivers/media/platform/mtk-vcodec/vdec_drv_if.h
@@ -85,6 +85,8 @@ void vdec_if_deinit(struct mtk_vcodec_ctx *ctx);
* @res_chg : [out] resolution change happens if current bs have different
* picture width/height
* Note: To flush the decoder when reaching EOF, set input bitstream as NULL.
+ *
+ * Return: 0 on success. -EIO on unrecoverable error.
*/
int vdec_if_decode(struct mtk_vcodec_ctx *ctx, struct mtk_vcodec_mem *bs,
struct vdec_fb *fb, bool *res_chg);
--
2.12.0.246.ga2ecc84866-goog
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