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J . Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Matthias Brugger , , , , , , , Subject: [PATCH v4,03/22] v4l2: verify restricted dmabufs are used in restricted queue Date: Mon, 29 Jan 2024 14:30:06 +0800 Message-ID: <20240129063025.29251-4-yunfei.dong@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240129063025.29251-1-yunfei.dong@mediatek.com> References: <20240129063025.29251-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--8.360000-8.000000 X-TMASE-MatchedRID: vT/skvKLwFh/+iNkyaz33x+WEMjoO9WWTJDl9FKHbrn8dcjERAe6XpPD bikkMnICYUA4QKGgNJ2/QAgXHCg/RXdWNVeH9NKPSEQN/D/3cG4k9Lf/qe8xx9VU7IWeAUCLMCm LSFOvZt1yylwV7Bc73YAy6p60ZV62fJ5/bZ6npdiyO81X3yak88kZdO1mPd6HHujJdWgMIOuuBc q5ylGQImmWoby5Y3Os7MRn2aF6FKR+3BndfXUhXQ== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.360000-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: DF28679987472B888EA7E9A1D6228B4E0BCD01647BD0B2DD86B95E8C06EC4EB42000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240128_224051_081922_AD588E4D X-CRM114-Status: GOOD ( 12.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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;