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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , Subject: [PATCH v5,03/23] v4l2: verify restricted dmabufs are used in restricted queue Date: Fri, 12 Apr 2024 17:08:31 +0800 Message-ID: <20240412090851.24999-4-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240412090851.24999-1-yunfei.dong@mediatek.com> References: <20240412090851.24999-1-yunfei.dong@mediatek.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N From: Jeffrey Kardatzke Verfies in the dmabuf implementations that if the restricted memory flag is set for a queue that the dmabuf submitted to the queue is unmappable. Signed-off-by: Jeffrey Kardatzke Signed-off-by: Yunfei Dong --- drivers/media/common/videobuf2/videobuf2-dma-contig.c | 8 ++++++++ drivers/media/common/videobuf2/videobuf2-dma-sg.c | 8 ++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index 3d4fd4ef5310..f953570fef27 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -710,6 +710,14 @@ static int vb2_dc_map_dmabuf(void *mem_priv) return -EINVAL; } + /* Verify the dmabuf is restricted if we are in restricted mode, this is done + * by validating there is no page entry for the dmabuf. + */ + if (buf->vb->vb2_queue->restricted_mem && sg_page(sgt->sgl)) { + pr_err("restricted queue requires restricted dma_buf"); + return -EINVAL; + } + /* checking if dmabuf is big enough to store contiguous chunk */ contig_size = vb2_dc_get_contiguous_size(sgt); if (contig_size < buf->size) { diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index 6975a71d740f..f87bd3f40b9b 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -570,6 +570,14 @@ static int vb2_dma_sg_map_dmabuf(void *mem_priv) return -EINVAL; } + /* Verify the dmabuf is restricted if we are in restricted mode, this is done + * by validating there is no page entry for the dmabuf. + */ + if (buf->vb->vb2_queue->restricted_mem && !sg_page(sgt->sgl)) { + pr_err("restricted queue requires restricted dma_buf"); + return -EINVAL; + } + buf->dma_sgt = sgt; buf->vaddr = NULL;