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[media] mtk-vcodec: add index check in decoder vidioc_qbuf

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vb2_qbuf will check the buffer index. If a driver overrides
vidioc_qbuf and use the buffer index, the driver needs to check
the index.

Signed-off-by: Wu-Cheng Li <wuchengli@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Wu-Cheng Li 2016-11-10 03:24:05 -02:00 committed by Mauro Carvalho Chehab
parent 93d39efdb1
commit b7ccb9fb79
1 changed files with 4 additions and 0 deletions
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4
drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
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@ -533,6 +533,10 @@ static int vidioc_vdec_qbuf(struct file *file, void *priv,
}
vq = v4l2_m2m_get_vq(ctx->m2m_ctx, buf->type);
if (buf->index >= vq->num_buffers) {
mtk_v4l2_debug(1, "buffer index %d out of range", buf->index);
return -EINVAL;
}
vb = vq->bufs[buf->index];
vb2_v4l2 = container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
mtkbuf = container_of(vb2_v4l2, struct mtk_video_dec_buf, vb);