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Subject[PATCH 1/2] staging: media: atomisp: fix stack overflow in init_pipe_defaults()
Date
From: Arnd Bergmann <arnd@arndb.de>

When building with clang, multiple copies of the structures to be
initialized are passed around on the stack and copied locally, using an
insane amount of stack space:

drivers/staging/media/atomisp/pci/sh_css.c:2371:1: error: stack frame size of 26864 bytes in function 'create_pipe' [-Werror,-Wframe-larger-than=]

Use constantly-allocated variables plus an explicit memcpy()
to avoid that.

Fixes: 6dc9a2568f84 ("media: atomisp: convert default struct values to use compound-literals with designated initializers")
Co-authored-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
.../media/atomisp/pci/ia_css_frame_public.h | 6 ++---
.../staging/media/atomisp/pci/ia_css_pipe.h | 15 ++++-------
.../media/atomisp/pci/ia_css_pipe_public.h | 6 ++---
.../staging/media/atomisp/pci/ia_css_types.h | 6 ++---
.../sdis/common/ia_css_sdis_common_types.h | 9 +++----
.../runtime/binary/interface/ia_css_binary.h | 3 +--
.../pipeline/interface/ia_css_pipeline.h | 3 +--
.../pci/runtime/pipeline/src/pipeline.c | 13 ++++++---
drivers/staging/media/atomisp/pci/sh_css.c | 27 +++++++++++++------
9 files changed, 46 insertions(+), 42 deletions(-)

diff --git a/drivers/staging/media/atomisp/pci/ia_css_frame_public.h b/drivers/staging/media/atomisp/pci/ia_css_frame_public.h
index d822aa235ffe..96c86f0dc81c 100644
--- a/drivers/staging/media/atomisp/pci/ia_css_frame_public.h
+++ b/drivers/staging/media/atomisp/pci/ia_css_frame_public.h
@@ -122,8 +122,7 @@ struct ia_css_frame_info {
struct ia_css_crop_info crop_info;
};

-#define IA_CSS_BINARY_DEFAULT_FRAME_INFO \
-(struct ia_css_frame_info) { \
+#define IA_CSS_BINARY_DEFAULT_FRAME_INFO { \
.format = IA_CSS_FRAME_FORMAT_NUM, \
.raw_bayer_order = IA_CSS_BAYER_ORDER_NUM, \
}
@@ -185,8 +184,7 @@ struct ia_css_frame {
info.format */
};

-#define DEFAULT_FRAME \
-(struct ia_css_frame) { \
+#define DEFAULT_FRAME { \
.info = IA_CSS_BINARY_DEFAULT_FRAME_INFO, \
.dynamic_queue_id = SH_CSS_INVALID_QUEUE_ID, \
.buf_type = IA_CSS_BUFFER_TYPE_INVALID, \
diff --git a/drivers/staging/media/atomisp/pci/ia_css_pipe.h b/drivers/staging/media/atomisp/pci/ia_css_pipe.h
index 9c0c4ccf4571..bb0abf9bffb1 100644
--- a/drivers/staging/media/atomisp/pci/ia_css_pipe.h
+++ b/drivers/staging/media/atomisp/pci/ia_css_pipe.h
@@ -40,8 +40,7 @@ struct ia_css_preview_settings {
struct ia_css_pipe *acc_pipe;
};

-#define IA_CSS_DEFAULT_PREVIEW_SETTINGS \
-(struct ia_css_preview_settings) { \
+#define IA_CSS_DEFAULT_PREVIEW_SETTINGS { \
.copy_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
.preview_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
.vf_pp_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
@@ -65,8 +64,7 @@ struct ia_css_capture_settings {
unsigned int num_yuv_scaler;
};

-#define IA_CSS_DEFAULT_CAPTURE_SETTINGS \
-(struct ia_css_capture_settings) { \
+#define IA_CSS_DEFAULT_CAPTURE_SETTINGS { \
.copy_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
.primary_binary = {IA_CSS_BINARY_DEFAULT_SETTINGS}, \
.pre_isp_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
@@ -91,8 +89,7 @@ struct ia_css_video_settings {
unsigned int num_yuv_scaler;
};

-#define IA_CSS_DEFAULT_VIDEO_SETTINGS \
-(struct ia_css_video_settings) { \
+#define IA_CSS_DEFAULT_VIDEO_SETTINGS { \
.copy_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
.video_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
.vf_pp_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
@@ -108,8 +105,7 @@ struct ia_css_yuvpp_settings {
unsigned int num_output;
};

-#define IA_CSS_DEFAULT_YUVPP_SETTINGS \
-(struct ia_css_yuvpp_settings) { \
+#define IA_CSS_DEFAULT_YUVPP_SETTINGS { \
.copy_binary = IA_CSS_BINARY_DEFAULT_SETTINGS, \
}

@@ -157,8 +153,7 @@ struct ia_css_pipe {
unsigned int pipe_num;
};

-#define IA_CSS_DEFAULT_PIPE \
-(struct ia_css_pipe) { \
+#define IA_CSS_DEFAULT_PIPE { \
.config = DEFAULT_PIPE_CONFIG, \
.info = DEFAULT_PIPE_INFO, \
.mode = IA_CSS_PIPE_ID_ACC, /* (pipe_id) */ \
diff --git a/drivers/staging/media/atomisp/pci/ia_css_pipe_public.h b/drivers/staging/media/atomisp/pci/ia_css_pipe_public.h
index 17b0941382bf..4affd21f9e3f 100644
--- a/drivers/staging/media/atomisp/pci/ia_css_pipe_public.h
+++ b/drivers/staging/media/atomisp/pci/ia_css_pipe_public.h
@@ -149,8 +149,7 @@ struct ia_css_pipe_config {
/**
* Default settings for newly created pipe configurations.
*/
-#define DEFAULT_PIPE_CONFIG \
-(struct ia_css_pipe_config) { \
+#define DEFAULT_PIPE_CONFIG { \
.mode = IA_CSS_PIPE_MODE_PREVIEW, \
.isp_pipe_version = 1, \
.output_info = {IA_CSS_BINARY_DEFAULT_FRAME_INFO}, \
@@ -203,8 +202,7 @@ struct ia_css_pipe_info {
/**
* Defaults for ia_css_pipe_info structs.
*/
-#define DEFAULT_PIPE_INFO \
-(struct ia_css_pipe_info) { \
+#define DEFAULT_PIPE_INFO {\
.output_info = {IA_CSS_BINARY_DEFAULT_FRAME_INFO}, \
.vf_output_info = {IA_CSS_BINARY_DEFAULT_FRAME_INFO}, \
.raw_output_info = IA_CSS_BINARY_DEFAULT_FRAME_INFO, \
diff --git a/drivers/staging/media/atomisp/pci/ia_css_types.h b/drivers/staging/media/atomisp/pci/ia_css_types.h
index bac0a41add92..6e34d401f9df 100644
--- a/drivers/staging/media/atomisp/pci/ia_css_types.h
+++ b/drivers/staging/media/atomisp/pci/ia_css_types.h
@@ -392,8 +392,7 @@ struct ia_css_grid_info {
};

/* defaults for ia_css_grid_info structs */
-#define DEFAULT_GRID_INFO \
-(struct ia_css_grid_info) { \
+#define DEFAULT_GRID_INFO { \
.dvs_grid = DEFAULT_DVS_GRID_INFO, \
.vamem_type = IA_CSS_VAMEM_TYPE_1 \
}
@@ -485,8 +484,7 @@ struct ia_css_capture_config {
};

/* default settings for ia_css_capture_config structs */
-#define DEFAULT_CAPTURE_CONFIG \
-(struct ia_css_capture_config) { \
+#define DEFAULT_CAPTURE_CONFIG { \
.mode = IA_CSS_CAPTURE_MODE_PRIMARY, \
}

diff --git a/drivers/staging/media/atomisp/pci/isp/kernels/sdis/common/ia_css_sdis_common_types.h b/drivers/staging/media/atomisp/pci/isp/kernels/sdis/common/ia_css_sdis_common_types.h
index c92f5836059b..c2ec30b4abd4 100644
--- a/drivers/staging/media/atomisp/pci/isp/kernels/sdis/common/ia_css_sdis_common_types.h
+++ b/drivers/staging/media/atomisp/pci/isp/kernels/sdis/common/ia_css_sdis_common_types.h
@@ -197,12 +197,11 @@ struct ia_css_dvs_stat_grid_info {

/* DVS statistics generated by accelerator default grid info
*/
-#define DEFAULT_DVS_GRID_INFO \
-(union ia_css_dvs_grid_u) { \
- .dvs_stat_grid_info = (struct ia_css_dvs_stat_grid_info) { \
+#define DEFAULT_DVS_GRID_INFO { \
+ .dvs_stat_grid_info = { \
.fe_roi_cfg = { \
- [1] = (struct dvs_stat_public_dvs_level_fe_roi_cfg) { \
- .x_start = 4 \
+ [1] = { \
+ .x_start = 4 \
} \
} \
} \
diff --git a/drivers/staging/media/atomisp/pci/runtime/binary/interface/ia_css_binary.h b/drivers/staging/media/atomisp/pci/runtime/binary/interface/ia_css_binary.h
index 560580023b29..b44099dbdacd 100644
--- a/drivers/staging/media/atomisp/pci/runtime/binary/interface/ia_css_binary.h
+++ b/drivers/staging/media/atomisp/pci/runtime/binary/interface/ia_css_binary.h
@@ -144,8 +144,7 @@ struct ia_css_binary {
struct ia_css_isp_param_css_segments css_params;
};

-#define IA_CSS_BINARY_DEFAULT_SETTINGS \
-(struct ia_css_binary) { \
+#define IA_CSS_BINARY_DEFAULT_SETTINGS { \
.input_format = ATOMISP_INPUT_FORMAT_YUV420_8_LEGACY, \
.in_frame_info = IA_CSS_BINARY_DEFAULT_FRAME_INFO, \
.internal_frame_info = IA_CSS_BINARY_DEFAULT_FRAME_INFO, \
diff --git a/drivers/staging/media/atomisp/pci/runtime/pipeline/interface/ia_css_pipeline.h b/drivers/staging/media/atomisp/pci/runtime/pipeline/interface/ia_css_pipeline.h
index 1f4afd163ffa..18a7d18e197e 100644
--- a/drivers/staging/media/atomisp/pci/runtime/pipeline/interface/ia_css_pipeline.h
+++ b/drivers/staging/media/atomisp/pci/runtime/pipeline/interface/ia_css_pipeline.h
@@ -57,8 +57,7 @@ struct ia_css_pipeline {
u32 pipe_qos_config;
};

-#define DEFAULT_PIPELINE \
-(struct ia_css_pipeline) { \
+#define DEFAULT_PIPELINE { \
.pipe_id = IA_CSS_PIPE_ID_PREVIEW, \
.in_frame = DEFAULT_FRAME, \
.out_frame = {DEFAULT_FRAME}, \
diff --git a/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c b/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c
index 29207fe120a0..4b8e85bc2122 100644
--- a/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c
+++ b/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c
@@ -665,6 +665,8 @@ static int pipeline_stage_create(
return err;
}

+static const struct ia_css_frame ia_css_default_frame = DEFAULT_FRAME;
+
static void pipeline_init_defaults(
struct ia_css_pipeline *pipeline,
enum ia_css_pipe_id pipe_id,
@@ -677,10 +679,15 @@ static void pipeline_init_defaults(
pipeline->stages = NULL;
pipeline->stop_requested = false;
pipeline->current_stage = NULL;
- pipeline->in_frame = DEFAULT_FRAME;
+
+ memcpy(&pipeline->in_frame, &ia_css_default_frame,
+ sizeof(ia_css_default_frame));
+
for (i = 0; i < IA_CSS_PIPE_MAX_OUTPUT_STAGE; i++) {
- pipeline->out_frame[i] = DEFAULT_FRAME;
- pipeline->vf_frame[i] = DEFAULT_FRAME;
+ memcpy(&pipeline->out_frame[i], &ia_css_default_frame,
+ sizeof(ia_css_default_frame));
+ memcpy(&pipeline->vf_frame[i], &ia_css_default_frame,
+ sizeof(ia_css_default_frame));
}
pipeline->num_execs = -1;
pipeline->acquire_isp_each_stage = true;
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index 31a13a486b70..9c754e29fa00 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -2231,10 +2231,17 @@ create_host_pipeline(struct ia_css_stream *stream) {
return err;
}

+static const struct ia_css_pipe default_pipe = IA_CSS_DEFAULT_PIPE;
+static const struct ia_css_preview_settings preview = IA_CSS_DEFAULT_PREVIEW_SETTINGS;
+static const struct ia_css_capture_settings capture = IA_CSS_DEFAULT_CAPTURE_SETTINGS;
+static const struct ia_css_video_settings video = IA_CSS_DEFAULT_VIDEO_SETTINGS;
+static const struct ia_css_yuvpp_settings yuvpp = IA_CSS_DEFAULT_YUVPP_SETTINGS;
+
static int
init_pipe_defaults(enum ia_css_pipe_mode mode,
struct ia_css_pipe *pipe,
bool copy_pipe) {
+
if (!pipe)
{
IA_CSS_ERROR("NULL pipe parameter");
@@ -2242,14 +2249,14 @@ init_pipe_defaults(enum ia_css_pipe_mode mode,
}

/* Initialize pipe to pre-defined defaults */
- *pipe = IA_CSS_DEFAULT_PIPE;
+ memcpy(pipe, &default_pipe, sizeof(default_pipe));

/* TODO: JB should not be needed, but temporary backward reference */
switch (mode)
{
case IA_CSS_PIPE_MODE_PREVIEW:
pipe->mode = IA_CSS_PIPE_ID_PREVIEW;
- pipe->pipe_settings.preview = IA_CSS_DEFAULT_PREVIEW_SETTINGS;
+ memcpy(&pipe->pipe_settings.preview, &preview, sizeof(preview));
break;
case IA_CSS_PIPE_MODE_CAPTURE:
if (copy_pipe) {
@@ -2257,11 +2264,11 @@ init_pipe_defaults(enum ia_css_pipe_mode mode,
} else {
pipe->mode = IA_CSS_PIPE_ID_CAPTURE;
}
- pipe->pipe_settings.capture = IA_CSS_DEFAULT_CAPTURE_SETTINGS;
+ memcpy(&pipe->pipe_settings.capture, &capture, sizeof(capture));
break;
case IA_CSS_PIPE_MODE_VIDEO:
pipe->mode = IA_CSS_PIPE_ID_VIDEO;
- pipe->pipe_settings.video = IA_CSS_DEFAULT_VIDEO_SETTINGS;
+ memcpy(&pipe->pipe_settings.video, &video, sizeof(video));
break;
case IA_CSS_PIPE_MODE_ACC:
pipe->mode = IA_CSS_PIPE_ID_ACC;
@@ -2271,7 +2278,7 @@ init_pipe_defaults(enum ia_css_pipe_mode mode,
break;
case IA_CSS_PIPE_MODE_YUVPP:
pipe->mode = IA_CSS_PIPE_ID_YUVPP;
- pipe->pipe_settings.yuvpp = IA_CSS_DEFAULT_YUVPP_SETTINGS;
+ memcpy(&pipe->pipe_settings.yuvpp, &yuvpp, sizeof(yuvpp));
break;
default:
return -EINVAL;
@@ -8769,12 +8776,16 @@ sh_css_init_host_sp_control_vars(void) {
}

/*
- * create the internal structures and fill in the configuration data
- */
+ * create the internal structures and fill in the configuration data
+ */
+
+static const struct
+ia_css_pipe_config ia_css_pipe_default_config = DEFAULT_PIPE_CONFIG;
+
void ia_css_pipe_config_defaults(struct ia_css_pipe_config *pipe_config)
{
ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE, "ia_css_pipe_config_defaults()\n");
- *pipe_config = DEFAULT_PIPE_CONFIG;
+ memcpy(pipe_config, &ia_css_pipe_default_config, sizeof(*pipe_config));
}

void
--
2.26.2
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