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media: platform: davinci: drop VPFE_CMD_S_CCDC_RAW_PARAMS

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drop VPFE_CMD_S_CCDC_RAW_PARAMS ioctl from dm355/dm644x following reasons:

- This ioctl was never in public api and was only defined in kernel header.
- The function set_params constantly mixes up pointers and phys_addr_t
  numbers.
- This is part of a 'VPFE_CMD_S_CCDC_RAW_PARAMS' ioctl command that is
  described as an 'experimental ioctl that will change in future kernels'.
- The code to allocate the table never gets called after we copy_from_user
  the user input over the kernel settings, and then compare them
  for inequality.
- We then go on to use an address provided by user space as both the
  __user pointer for input and pass it through phys_to_virt to come up
  with a kernel pointer to copy the data to. This looks like a trivially
  exploitable root hole.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Prabhakar Lad 2017-07-20 04:56:31 -04:00 committed by Mauro Carvalho Chehab
parent da05d52d2f
commit b25db38392
6 changed files with 4 additions and 346 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/media/platform/davinci/ccdc_hw_device.h
View File

@ -42,16 +42,6 @@ struct ccdc_hw_ops {
int (*set_hw_if_params) (struct vpfe_hw_if_param *param);
/* get interface parameters */
int (*get_hw_if_params) (struct vpfe_hw_if_param *param);
/*
* Pointer to function to set parameters. Used
* for implementing VPFE_S_CCDC_PARAMS
*/
int (*set_params) (void *params);
/*
* Pointer to function to get parameter. Used
* for implementing VPFE_G_CCDC_PARAMS
*/
int (*get_params) (void *params);
/* Pointer to function to configure ccdc */
int (*configure) (void);

92
drivers/media/platform/davinci/dm355_ccdc.c
View File

@ -17,12 +17,7 @@
* This module is for configuring DM355 CCD controller of VPFE to capture
* Raw yuv or Bayer RGB data from a decoder. CCDC has several modules
* such as Defect Pixel Correction, Color Space Conversion etc to
* pre-process the Bayer RGB data, before writing it to SDRAM. This
* module also allows application to configure individual
* module parameters through VPFE_CMD_S_CCDC_RAW_PARAMS IOCTL.
* To do so, application include dm355_ccdc.h and vpfe_capture.h header
* files. The setparams() API is called by vpfe_capture driver
* to configure module parameters
* pre-process the Bayer RGB data, before writing it to SDRAM.
*
* TODO: 1) Raw bayer parameter settings and bayer capture
* 2) Split module parameter structure to module specific ioctl structs
@ -260,90 +255,6 @@ static void ccdc_setwin(struct v4l2_rect *image_win,
dev_dbg(ccdc_cfg.dev, "\nEnd of ccdc_setwin...");
}
static int validate_ccdc_param(struct ccdc_config_params_raw *ccdcparam)
{
if (ccdcparam->datasft < CCDC_DATA_NO_SHIFT ||
ccdcparam->datasft > CCDC_DATA_SHIFT_6BIT) {
dev_dbg(ccdc_cfg.dev, "Invalid value of data shift\n");
return -EINVAL;
}
if (ccdcparam->mfilt1 < CCDC_NO_MEDIAN_FILTER1 ||
ccdcparam->mfilt1 > CCDC_MEDIAN_FILTER1) {
dev_dbg(ccdc_cfg.dev, "Invalid value of median filter1\n");
return -EINVAL;
}
if (ccdcparam->mfilt2 < CCDC_NO_MEDIAN_FILTER2 ||
ccdcparam->mfilt2 > CCDC_MEDIAN_FILTER2) {
dev_dbg(ccdc_cfg.dev, "Invalid value of median filter2\n");
return -EINVAL;
}
if ((ccdcparam->med_filt_thres < 0) ||
(ccdcparam->med_filt_thres > CCDC_MED_FILT_THRESH)) {
dev_dbg(ccdc_cfg.dev,
"Invalid value of median filter threshold\n");
return -EINVAL;
}
if (ccdcparam->data_sz < CCDC_DATA_16BITS ||
ccdcparam->data_sz > CCDC_DATA_8BITS) {
dev_dbg(ccdc_cfg.dev, "Invalid value of data size\n");
return -EINVAL;
}
if (ccdcparam->alaw.enable) {
if (ccdcparam->alaw.gamma_wd < CCDC_GAMMA_BITS_13_4 ||
ccdcparam->alaw.gamma_wd > CCDC_GAMMA_BITS_09_0) {
dev_dbg(ccdc_cfg.dev, "Invalid value of ALAW\n");
return -EINVAL;
}
}
if (ccdcparam->blk_clamp.b_clamp_enable) {
if (ccdcparam->blk_clamp.sample_pixel < CCDC_SAMPLE_1PIXELS ||
ccdcparam->blk_clamp.sample_pixel > CCDC_SAMPLE_16PIXELS) {
dev_dbg(ccdc_cfg.dev,
"Invalid value of sample pixel\n");
return -EINVAL;
}
if (ccdcparam->blk_clamp.sample_ln < CCDC_SAMPLE_1LINES ||
ccdcparam->blk_clamp.sample_ln > CCDC_SAMPLE_16LINES) {
dev_dbg(ccdc_cfg.dev,
"Invalid value of sample lines\n");
return -EINVAL;
}
}
return 0;
}
/* Parameter operations */
static int ccdc_set_params(void __user *params)
{
struct ccdc_config_params_raw ccdc_raw_params;
int x;
/* only raw module parameters can be set through the IOCTL */
if (ccdc_cfg.if_type != VPFE_RAW_BAYER)
return -EINVAL;
x = copy_from_user(&ccdc_raw_params, params, sizeof(ccdc_raw_params));
if (x) {
dev_dbg(ccdc_cfg.dev, "ccdc_set_params: error in copying ccdcparams, %d\n",
x);
return -EFAULT;
}
if (!validate_ccdc_param(&ccdc_raw_params)) {
memcpy(&ccdc_cfg.bayer.config_params,
&ccdc_raw_params,
sizeof(ccdc_raw_params));
return 0;
}
return -EINVAL;
}
/* This function will configure CCDC for YCbCr video capture */
static void ccdc_config_ycbcr(void)
{
@ -939,7 +850,6 @@ static struct ccdc_hw_device ccdc_hw_dev = {
.enable = ccdc_enable,
.enable_out_to_sdram = ccdc_enable_output_to_sdram,
.set_hw_if_params = ccdc_set_hw_if_params,
.set_params = ccdc_set_params,
.configure = ccdc_configure,
.set_buftype = ccdc_set_buftype,
.get_buftype = ccdc_get_buftype,

151
drivers/media/platform/davinci/dm644x_ccdc.c
View File

@ -17,13 +17,9 @@
* This module is for configuring CCD controller of DM6446 VPFE to capture
* Raw yuv or Bayer RGB data from a decoder. CCDC has several modules
* such as Defect Pixel Correction, Color Space Conversion etc to
* pre-process the Raw Bayer RGB data, before writing it to SDRAM. This
* module also allows application to configure individual
* module parameters through VPFE_CMD_S_CCDC_RAW_PARAMS IOCTL.
* To do so, application includes dm644x_ccdc.h and vpfe_capture.h header
* files. The setparams() API is called by vpfe_capture driver
* to configure module parameters. This file is named DM644x so that other
* variants such DM6443 may be supported using the same module.
* pre-process the Raw Bayer RGB data, before writing it to SDRAM.
* This file is named DM644x so that other variants such DM6443
* may be supported using the same module.
*
* TODO: Test Raw bayer parameter settings and bayer capture
* Split module parameter structure to module specific ioctl structs
@ -216,96 +212,8 @@ static void ccdc_readregs(void)
dev_notice(ccdc_cfg.dev, "\nReading 0x%x to VERT_LINES...\n", val);
}
static int validate_ccdc_param(struct ccdc_config_params_raw *ccdcparam)
{
if (ccdcparam->alaw.enable) {
u8 max_gamma = ccdc_gamma_width_max_bit(ccdcparam->alaw.gamma_wd);
u8 max_data = ccdc_data_size_max_bit(ccdcparam->data_sz);
if ((ccdcparam->alaw.gamma_wd > CCDC_GAMMA_BITS_09_0) ||
(ccdcparam->alaw.gamma_wd < CCDC_GAMMA_BITS_15_6) ||
(max_gamma > max_data)) {
dev_dbg(ccdc_cfg.dev, "\nInvalid data line select");
return -1;
}
}
return 0;
}
static int ccdc_update_raw_params(struct ccdc_config_params_raw *raw_params)
{
struct ccdc_config_params_raw *config_params =
&ccdc_cfg.bayer.config_params;
unsigned int *fpc_virtaddr = NULL;
unsigned int *fpc_physaddr = NULL;
memcpy(config_params, raw_params, sizeof(*raw_params));
/*
* allocate memory for fault pixel table and copy the user
* values to the table
*/
if (!config_params->fault_pxl.enable)
return 0;
fpc_physaddr = (unsigned int *)config_params->fault_pxl.fpc_table_addr;
fpc_virtaddr = (unsigned int *)phys_to_virt(
(unsigned long)fpc_physaddr);
/*
* Allocate memory for FPC table if current
* FPC table buffer is not big enough to
* accommodate FPC Number requested
*/
if (raw_params->fault_pxl.fp_num != config_params->fault_pxl.fp_num) {
if (fpc_physaddr != NULL) {
free_pages((unsigned long)fpc_virtaddr,
get_order
(config_params->fault_pxl.fp_num *
FP_NUM_BYTES));
}
/* Allocate memory for FPC table */
fpc_virtaddr =
(unsigned int *)__get_free_pages(GFP_KERNEL | GFP_DMA,
get_order(raw_params->
fault_pxl.fp_num *
FP_NUM_BYTES));
if (fpc_virtaddr == NULL) {
dev_dbg(ccdc_cfg.dev,
"\nUnable to allocate memory for FPC");
return -EFAULT;
}
fpc_physaddr =
(unsigned int *)virt_to_phys((void *)fpc_virtaddr);
}
/* Copy number of fault pixels and FPC table */
config_params->fault_pxl.fp_num = raw_params->fault_pxl.fp_num;
if (copy_from_user(fpc_virtaddr,
(void __user *)raw_params->fault_pxl.fpc_table_addr,
config_params->fault_pxl.fp_num * FP_NUM_BYTES)) {
dev_dbg(ccdc_cfg.dev, "\n copy_from_user failed");
return -EFAULT;
}
config_params->fault_pxl.fpc_table_addr = (unsigned long)fpc_physaddr;
return 0;
}
static int ccdc_close(struct device *dev)
{
struct ccdc_config_params_raw *config_params =
&ccdc_cfg.bayer.config_params;
unsigned int *fpc_physaddr = NULL, *fpc_virtaddr = NULL;
fpc_physaddr = (unsigned int *)config_params->fault_pxl.fpc_table_addr;
if (fpc_physaddr != NULL) {
fpc_virtaddr = (unsigned int *)
phys_to_virt((unsigned long)fpc_physaddr);
free_pages((unsigned long)fpc_virtaddr,
get_order(config_params->fault_pxl.fp_num *
FP_NUM_BYTES));
}
return 0;
}
@ -339,29 +247,6 @@ static void ccdc_sbl_reset(void)
vpss_clear_wbl_overflow(VPSS_PCR_CCDC_WBL_O);
}
/* Parameter operations */
static int ccdc_set_params(void __user *params)
{
struct ccdc_config_params_raw ccdc_raw_params;
int x;
if (ccdc_cfg.if_type != VPFE_RAW_BAYER)
return -EINVAL;
x = copy_from_user(&ccdc_raw_params, params, sizeof(ccdc_raw_params));
if (x) {
dev_dbg(ccdc_cfg.dev, "ccdc_set_params: error in copyingccdc params, %d\n",
x);
return -EFAULT;
}
if (!validate_ccdc_param(&ccdc_raw_params)) {
if (!ccdc_update_raw_params(&ccdc_raw_params))
return 0;
}
return -EINVAL;
}
/*
* ccdc_config_ycbcr()
* This function will configure CCDC for YCbCr video capture
@ -489,32 +374,6 @@ static void ccdc_config_black_compense(struct ccdc_black_compensation *bcomp)
regw(val, CCDC_BLKCMP);
}
static void ccdc_config_fpc(struct ccdc_fault_pixel *fpc)
{
u32 val;
/* Initially disable FPC */
val = CCDC_FPC_DISABLE;
regw(val, CCDC_FPC);
if (!fpc->enable)
return;
/* Configure Fault pixel if needed */
regw(fpc->fpc_table_addr, CCDC_FPC_ADDR);
dev_dbg(ccdc_cfg.dev, "\nWriting 0x%lx to FPC_ADDR...\n",
(fpc->fpc_table_addr));
/* Write the FPC params with FPC disable */
val = fpc->fp_num & CCDC_FPC_FPC_NUM_MASK;
regw(val, CCDC_FPC);
dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FPC...\n", val);
/* read the FPC register */
val = regr(CCDC_FPC) | CCDC_FPC_ENABLE;
regw(val, CCDC_FPC);
dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FPC...\n", val);
}
/*
* ccdc_config_raw()
* This function will configure CCDC for Raw capture mode
@ -569,9 +428,6 @@ static void ccdc_config_raw(void)
/* Configure Black level compensation */
ccdc_config_black_compense(&config_params->blk_comp);
/* Configure Fault Pixel Correction */
ccdc_config_fpc(&config_params->fault_pxl);
/* If data size is 8 bit then pack the data */
if ((config_params->data_sz == CCDC_DATA_8BITS) ||
config_params->alaw.enable)
@ -929,7 +785,6 @@ static struct ccdc_hw_device ccdc_hw_dev = {
.reset = ccdc_sbl_reset,
.enable = ccdc_enable,
.set_hw_if_params = ccdc_set_hw_if_params,
.set_params = ccdc_set_params,
.configure = ccdc_configure,
.set_buftype = ccdc_set_buftype,
.get_buftype = ccdc_get_buftype,

75
drivers/media/platform/davinci/vpfe_capture.c
View File

@ -280,45 +280,6 @@ void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
}
EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
/*
* vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
*/
static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
struct v4l2_format *f)
{
struct v4l2_rect image_win;
enum ccdc_buftype buf_type;
enum ccdc_frmfmt frm_fmt;
memset(f, 0, sizeof(*f));
f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ccdc_dev->hw_ops.get_image_window(&image_win);
f->fmt.pix.width = image_win.width;
f->fmt.pix.height = image_win.height;
f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
f->fmt.pix.height;
buf_type = ccdc_dev->hw_ops.get_buftype();
f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
frm_fmt = ccdc_dev->hw_ops.get_frame_format();
if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
f->fmt.pix.field = V4L2_FIELD_NONE;
else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
else {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
return -EINVAL;
}
} else {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
return -EINVAL;
}
return 0;
}
/*
* vpfe_config_ccdc_image_format()
* For a pix format, configure ccdc to setup the capture
@ -1697,41 +1658,6 @@ unlock_out:
return ret;
}
static long vpfe_param_handler(struct file *file, void *priv,
bool valid_prio, unsigned int cmd, void *param)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
int ret;
v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
if (vpfe_dev->started) {
/* only allowed if streaming is not started */
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"device already started\n");
return -EBUSY;
}
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
switch (cmd) {
case VPFE_CMD_S_CCDC_RAW_PARAMS:
ret = -EINVAL;
v4l2_warn(&vpfe_dev->v4l2_dev,
"VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
break;
default:
ret = -ENOTTY;
}
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
/* vpfe capture ioctl operations */
static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
.vidioc_querycap = vpfe_querycap,
@ -1754,7 +1680,6 @@ static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
.vidioc_cropcap = vpfe_cropcap,
.vidioc_g_selection = vpfe_g_selection,
.vidioc_s_selection = vpfe_s_selection,
.vidioc_default = vpfe_param_handler,
};
static struct vpfe_device *vpfe_initialize(void)

12
include/media/davinci/dm644x_ccdc.h
View File

@ -103,16 +103,6 @@ struct ccdc_black_compensation {
char gb;
};
/* structure for fault pixel correction */
struct ccdc_fault_pixel {
/* Enable or Disable fault pixel correction */
unsigned char enable;
/* Number of fault pixel */
unsigned short fp_num;
/* Address of fault pixel table */
unsigned long fpc_table_addr;
};
/* Structure for CCDC configuration parameters for raw capture mode passed
* by application
*/
@ -125,8 +115,6 @@ struct ccdc_config_params_raw {
struct ccdc_black_clamp blk_clamp;
/* Structure for Black Compensation */
struct ccdc_black_compensation blk_comp;
/* Structure for Fault Pixel Module Configuration */
struct ccdc_fault_pixel fault_pxl;
};

10
include/media/davinci/vpfe_capture.h
View File

@ -183,14 +183,4 @@ struct vpfe_config_params {
};
#endif /* End of __KERNEL__ */
/**
* VPFE_CMD_S_CCDC_RAW_PARAMS - EXPERIMENTAL IOCTL to set raw capture params
* This can be used to configure modules such as defect pixel correction,
* color space conversion, culling etc. This is an experimental ioctl that
* will change in future kernels. So use this ioctl with care !
* TODO: This is to be split into multiple ioctls and also explore the
* possibility of extending the v4l2 api to include this
**/
#define VPFE_CMD_S_CCDC_RAW_PARAMS _IOW('V', BASE_VIDIOC_PRIVATE + 1, \
void *)
#endif /* _DAVINCI_VPFE_H */