From patchwork Mon Jul 17 08:13:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunfei Dong X-Patchwork-Id: 13316421 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org From: Yunfei Dong Subject: [PATCH 2/2] media: mediatek: vcodec: checking encoder ack message parameter Date: Mon, 17 Jul 2023 16:13:19 +0800 Message-ID: <20230717081319.12542-2-yunfei.dong@mediatek.com> In-Reply-To: <20230717081319.12542-1-yunfei.dong@mediatek.com> References: <20230717081319.12542-1-yunfei.dong@mediatek.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+lwn-linux-arm-kernel=archive.lwn.net@lists.infradead.org List-Archive: To: =?utf-8?q?N=C3=ADcolas_F_=2E_R_=2E_A_=2E_Prado?= , Nicolas Dufresne , Hans Verkuil , AngeloGioacchino Del Regno , Benjamin Gaignard , Nathan Hebert Cc: Chen-Yu Tsai , Hsin-Yi Wang , Fritz Koenig , Daniel Vetter , Steve Cho , Yunfei Dong , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com Need to checking all parameters of msg data are valid or not, in case of access null pointer or unreasonable value leading to kernel reboot. Signed-off-by: Yunfei Dong --- .../vcodec/encoder/mtk_vcodec_enc_drv.h | 2 + .../mediatek/vcodec/encoder/venc_vpu_if.c | 40 +++++++++++++++++-- 2 files changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h index c07010e56649..a042f607ed8d 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h +++ b/drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_drv.h @@ -123,6 +123,7 @@ struct mtk_enc_params { * @xfer_func: enum v4l2_xfer_func, colorspace transfer function * * @q_mutex: vb2_queue mutex. + * @vpu_inst: vpu instance pointer. */ struct mtk_vcodec_enc_ctx { enum mtk_instance_type type; @@ -156,6 +157,7 @@ struct mtk_vcodec_enc_ctx { enum v4l2_xfer_func xfer_func; struct mutex q_mutex; + void *vpu_inst; }; /** diff --git a/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c b/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c index 708db1bb32d4..213544e55166 100644 --- a/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c +++ b/drivers/media/platform/mediatek/vcodec/encoder/venc_vpu_if.c @@ -42,19 +42,47 @@ static void handle_enc_encode_msg(struct venc_vpu_inst *vpu, const void *data) vpu->is_key_frm = msg->is_key_frm; } +static bool vpu_enc_check_ap_inst(struct mtk_vcodec_enc_dev *enc_dev, struct venc_vpu_inst *vpu) +{ + struct mtk_vcodec_enc_ctx *ctx; + int ret = false; + + list_for_each_entry(ctx, &enc_dev->ctx_list, list) { + if (!IS_ERR_OR_NULL(ctx) && ctx->vpu_inst == vpu) { + ret = true; + break; + } + } + + return ret; +} + static void vpu_enc_ipi_handler(void *data, unsigned int len, void *priv) { + struct mtk_vcodec_enc_dev *enc_dev; const struct venc_vpu_ipi_msg_common *msg = data; - struct venc_vpu_inst *vpu = - (struct venc_vpu_inst *)(unsigned long)msg->venc_inst; + struct venc_vpu_inst *vpu; mtk_venc_debug(vpu->ctx, "msg_id %x inst %p status %d", msg->msg_id, vpu, msg->status); - vpu->signaled = 1; + enc_dev = (struct mtk_vcodec_enc_dev *)priv; + vpu = (struct venc_vpu_inst *)(unsigned long)msg->venc_inst; + if (!priv || !vpu) { + mtk_v4l2_venc_err(vpu->ctx, "venc_inst is NULL, did the SCP hang or crash?"); + return; + } + + if (!vpu_enc_check_ap_inst(enc_dev, vpu) || msg->msg_id < VPU_IPIMSG_ENC_INIT_DONE || + msg->msg_id > VPU_IPIMSG_ENC_DEINIT_DONE) { + mtk_v4l2_venc_err(vpu->ctx, "venc msg id not correctly => 0x%x", msg->msg_id); + vpu->failure = -EINVAL; + goto error; + } + vpu->failure = (msg->status != VENC_IPI_MSG_STATUS_OK); if (vpu->failure) { mtk_venc_err(vpu->ctx, "vpu enc status failure %d", vpu->failure); - return; + goto error; } switch (msg->msg_id) { @@ -72,6 +100,9 @@ static void vpu_enc_ipi_handler(void *data, unsigned int len, void *priv) mtk_venc_err(vpu->ctx, "unknown msg id %x", msg->msg_id); break; } + +error: + vpu->signaled = 1; } static int vpu_enc_send_msg(struct venc_vpu_inst *vpu, void *msg, @@ -105,6 +136,7 @@ int vpu_enc_init(struct venc_vpu_inst *vpu) init_waitqueue_head(&vpu->wq_hd); vpu->signaled = 0; vpu->failure = 0; + vpu->ctx->vpu_inst = vpu; status = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler, vpu->id, vpu_enc_ipi_handler, "venc", NULL);