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 <[email protected]>
Reviewed-by: Nicolas Dufresne <[email protected]>
---
.../vcodec/decoder/mtk_vcodec_dec_drv.h | 2 +
.../mediatek/vcodec/decoder/vdec_vpu_if.c | 77 ++++++++++++-------
2 files changed, 52 insertions(+), 27 deletions(-)
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
index 6c318de25a55..7e36b2c69b7d 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
@@ -161,6 +161,7 @@ struct mtk_vcodec_dec_pdata {
* @hw_id: hardware index used to identify different hardware.
*
* @msg_queue: msg queue used to store lat buffer information.
+ * @vpu_inst: vpu instance pointer.
*
* @is_10bit_bitstream: set to true if it's 10bit bitstream
*/
@@ -205,6 +206,7 @@ struct mtk_vcodec_dec_ctx {
int hw_id;
struct vdec_msg_queue msg_queue;
+ void *vpu_inst;
bool is_10bit_bitstream;
};
diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
index 82c3dc8c4127..23cfe5c6c90b 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
@@ -72,6 +72,21 @@ static void handle_get_param_msg_ack(const struct vdec_vpu_ipi_get_param_ack *ms
}
}
+static bool vpu_dec_check_ap_inst(struct mtk_vcodec_dec_dev *dec_dev, struct vdec_vpu_inst *vpu)
+{
+ struct mtk_vcodec_dec_ctx *ctx;
+ int ret = false;
+
+ list_for_each_entry(ctx, &dec_dev->ctx_list, list) {
+ if (!IS_ERR_OR_NULL(ctx) && ctx->vpu_inst == vpu) {
+ ret = true;
+ break;
+ }
+ }
+
+ return ret;
+}
+
/*
* vpu_dec_ipi_handler - Handler for VPU ipi message.
*
@@ -84,44 +99,51 @@ static void handle_get_param_msg_ack(const struct vdec_vpu_ipi_get_param_ack *ms
*/
static void vpu_dec_ipi_handler(void *data, unsigned int len, void *priv)
{
+ struct mtk_vcodec_dec_dev *dec_dev;
const struct vdec_vpu_ipi_ack *msg = data;
- struct vdec_vpu_inst *vpu = (struct vdec_vpu_inst *)
- (unsigned long)msg->ap_inst_addr;
+ struct vdec_vpu_inst *vpu;
- if (!vpu) {
+ dec_dev = (struct mtk_vcodec_dec_dev *)priv;
+ vpu = (struct vdec_vpu_inst *)(unsigned long)msg->ap_inst_addr;
+ if (!priv || !vpu) {
mtk_v4l2_vdec_err(vpu->ctx, "ap_inst_addr is NULL, did the SCP hang or crash?");
return;
}
- mtk_vdec_debug(vpu->ctx, "+ id=%X", msg->msg_id);
+ if (!vpu_dec_check_ap_inst(dec_dev, vpu) || msg->msg_id < VPU_IPIMSG_DEC_INIT_ACK ||
+ msg->msg_id > VPU_IPIMSG_DEC_GET_PARAM_ACK) {
+ mtk_v4l2_vdec_err(vpu->ctx, "vdec msg id not correctly => 0x%x", msg->msg_id);
+ vpu->failure = -EINVAL;
+ goto error;
+ }
vpu->failure = msg->status;
- vpu->signaled = 1;
+ if (msg->status != 0)
+ goto error;
- if (msg->status == 0) {
- switch (msg->msg_id) {
- case VPU_IPIMSG_DEC_INIT_ACK:
- handle_init_ack_msg(data);
- break;
+ switch (msg->msg_id) {
+ case VPU_IPIMSG_DEC_INIT_ACK:
+ handle_init_ack_msg(data);
+ break;
- case VPU_IPIMSG_DEC_START_ACK:
- case VPU_IPIMSG_DEC_END_ACK:
- case VPU_IPIMSG_DEC_DEINIT_ACK:
- case VPU_IPIMSG_DEC_RESET_ACK:
- case VPU_IPIMSG_DEC_CORE_ACK:
- case VPU_IPIMSG_DEC_CORE_END_ACK:
- break;
+ case VPU_IPIMSG_DEC_START_ACK:
+ case VPU_IPIMSG_DEC_END_ACK:
+ case VPU_IPIMSG_DEC_DEINIT_ACK:
+ case VPU_IPIMSG_DEC_RESET_ACK:
+ case VPU_IPIMSG_DEC_CORE_ACK:
+ case VPU_IPIMSG_DEC_CORE_END_ACK:
+ break;
- case VPU_IPIMSG_DEC_GET_PARAM_ACK:
- handle_get_param_msg_ack(data);
- break;
- default:
- mtk_vdec_err(vpu->ctx, "invalid msg=%X", msg->msg_id);
- break;
- }
+ case VPU_IPIMSG_DEC_GET_PARAM_ACK:
+ handle_get_param_msg_ack(data);
+ break;
+ default:
+ mtk_vdec_err(vpu->ctx, "invalid msg=%X", msg->msg_id);
+ break;
}
- mtk_vdec_debug(vpu->ctx, "- id=%X", msg->msg_id);
+error:
+ vpu->signaled = 1;
}
static int vcodec_vpu_send_msg(struct vdec_vpu_inst *vpu, void *msg, int len)
@@ -182,9 +204,10 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
init_waitqueue_head(&vpu->wq);
vpu->handler = vpu_dec_ipi_handler;
+ vpu->ctx->vpu_inst = vpu;
err = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler, vpu->id,
- vpu->handler, "vdec", NULL);
+ vpu->handler, "vdec", vpu->ctx->dev);
if (err) {
mtk_vdec_err(vpu->ctx, "vpu_ipi_register fail status=%d", err);
return err;
@@ -193,7 +216,7 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
if (vpu->ctx->dev->vdec_pdata->hw_arch == MTK_VDEC_LAT_SINGLE_CORE) {
err = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler,
vpu->core_id, vpu->handler,
- "vdec", NULL);
+ "vdec", vpu->ctx->dev);
if (err) {
mtk_vdec_err(vpu->ctx, "vpu_ipi_register core fail status=%d", err);
return err;
--
2.18.0
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 <[email protected]>
---
.../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);
--
2.18.0
Hi Yunfei,
Le samedi 22 juillet 2023 à 15:46 +0800, Yunfei Dong a écrit :
> 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.
May I suggest an alternative commit message ? It would look like:
media: mediatek: vcodec: Fix possible invalid memory access
Validate that the context pointer and the vpu instance within this
context is valid. <please add why it may occur here>
I cannot really provide a full message here, but my understanding is that it is
normal behaviour for the IRQ handler to be called after the context or the VPU
instance has been released ? It is unlikely a great programming pattern though,
can't you remove the handler on time instead ?
Nicolas
>
> Signed-off-by: Yunfei Dong <[email protected]>
> Reviewed-by: Nicolas Dufresne <[email protected]>
> ---
> .../vcodec/decoder/mtk_vcodec_dec_drv.h | 2 +
> .../mediatek/vcodec/decoder/vdec_vpu_if.c | 77 ++++++++++++-------
> 2 files changed, 52 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
> index 6c318de25a55..7e36b2c69b7d 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv.h
> @@ -161,6 +161,7 @@ struct mtk_vcodec_dec_pdata {
> * @hw_id: hardware index used to identify different hardware.
> *
> * @msg_queue: msg queue used to store lat buffer information.
> + * @vpu_inst: vpu instance pointer.
> *
> * @is_10bit_bitstream: set to true if it's 10bit bitstream
> */
> @@ -205,6 +206,7 @@ struct mtk_vcodec_dec_ctx {
> int hw_id;
>
> struct vdec_msg_queue msg_queue;
> + void *vpu_inst;
>
> bool is_10bit_bitstream;
> };
> diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> index 82c3dc8c4127..23cfe5c6c90b 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec_vpu_if.c
> @@ -72,6 +72,21 @@ static void handle_get_param_msg_ack(const struct vdec_vpu_ipi_get_param_ack *ms
> }
> }
>
> +static bool vpu_dec_check_ap_inst(struct mtk_vcodec_dec_dev *dec_dev, struct vdec_vpu_inst *vpu)
> +{
> + struct mtk_vcodec_dec_ctx *ctx;
> + int ret = false;
> +
> + list_for_each_entry(ctx, &dec_dev->ctx_list, list) {
> + if (!IS_ERR_OR_NULL(ctx) && ctx->vpu_inst == vpu) {
> + ret = true;
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> /*
> * vpu_dec_ipi_handler - Handler for VPU ipi message.
> *
> @@ -84,44 +99,51 @@ static void handle_get_param_msg_ack(const struct vdec_vpu_ipi_get_param_ack *ms
> */
> static void vpu_dec_ipi_handler(void *data, unsigned int len, void *priv)
> {
> + struct mtk_vcodec_dec_dev *dec_dev;
> const struct vdec_vpu_ipi_ack *msg = data;
> - struct vdec_vpu_inst *vpu = (struct vdec_vpu_inst *)
> - (unsigned long)msg->ap_inst_addr;
> + struct vdec_vpu_inst *vpu;
>
> - if (!vpu) {
> + dec_dev = (struct mtk_vcodec_dec_dev *)priv;
> + vpu = (struct vdec_vpu_inst *)(unsigned long)msg->ap_inst_addr;
> + if (!priv || !vpu) {
> mtk_v4l2_vdec_err(vpu->ctx, "ap_inst_addr is NULL, did the SCP hang or crash?");
> return;
> }
>
> - mtk_vdec_debug(vpu->ctx, "+ id=%X", msg->msg_id);
> + if (!vpu_dec_check_ap_inst(dec_dev, vpu) || msg->msg_id < VPU_IPIMSG_DEC_INIT_ACK ||
> + msg->msg_id > VPU_IPIMSG_DEC_GET_PARAM_ACK) {
> + mtk_v4l2_vdec_err(vpu->ctx, "vdec msg id not correctly => 0x%x", msg->msg_id);
> + vpu->failure = -EINVAL;
> + goto error;
> + }
>
> vpu->failure = msg->status;
> - vpu->signaled = 1;
> + if (msg->status != 0)
> + goto error;
>
> - if (msg->status == 0) {
> - switch (msg->msg_id) {
> - case VPU_IPIMSG_DEC_INIT_ACK:
> - handle_init_ack_msg(data);
> - break;
> + switch (msg->msg_id) {
> + case VPU_IPIMSG_DEC_INIT_ACK:
> + handle_init_ack_msg(data);
> + break;
>
> - case VPU_IPIMSG_DEC_START_ACK:
> - case VPU_IPIMSG_DEC_END_ACK:
> - case VPU_IPIMSG_DEC_DEINIT_ACK:
> - case VPU_IPIMSG_DEC_RESET_ACK:
> - case VPU_IPIMSG_DEC_CORE_ACK:
> - case VPU_IPIMSG_DEC_CORE_END_ACK:
> - break;
> + case VPU_IPIMSG_DEC_START_ACK:
> + case VPU_IPIMSG_DEC_END_ACK:
> + case VPU_IPIMSG_DEC_DEINIT_ACK:
> + case VPU_IPIMSG_DEC_RESET_ACK:
> + case VPU_IPIMSG_DEC_CORE_ACK:
> + case VPU_IPIMSG_DEC_CORE_END_ACK:
> + break;
>
> - case VPU_IPIMSG_DEC_GET_PARAM_ACK:
> - handle_get_param_msg_ack(data);
> - break;
> - default:
> - mtk_vdec_err(vpu->ctx, "invalid msg=%X", msg->msg_id);
> - break;
> - }
> + case VPU_IPIMSG_DEC_GET_PARAM_ACK:
> + handle_get_param_msg_ack(data);
> + break;
> + default:
> + mtk_vdec_err(vpu->ctx, "invalid msg=%X", msg->msg_id);
> + break;
> }
>
> - mtk_vdec_debug(vpu->ctx, "- id=%X", msg->msg_id);
> +error:
> + vpu->signaled = 1;
> }
>
> static int vcodec_vpu_send_msg(struct vdec_vpu_inst *vpu, void *msg, int len)
> @@ -182,9 +204,10 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
>
> init_waitqueue_head(&vpu->wq);
> vpu->handler = vpu_dec_ipi_handler;
> + vpu->ctx->vpu_inst = vpu;
>
> err = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler, vpu->id,
> - vpu->handler, "vdec", NULL);
> + vpu->handler, "vdec", vpu->ctx->dev);
> if (err) {
> mtk_vdec_err(vpu->ctx, "vpu_ipi_register fail status=%d", err);
> return err;
> @@ -193,7 +216,7 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
> if (vpu->ctx->dev->vdec_pdata->hw_arch == MTK_VDEC_LAT_SINGLE_CORE) {
> err = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler,
> vpu->core_id, vpu->handler,
> - "vdec", NULL);
> + "vdec", vpu->ctx->dev);
> if (err) {
> mtk_vdec_err(vpu->ctx, "vpu_ipi_register core fail status=%d", err);
> return err;