DivestOS/Patches/Linux_CVEs/CVE-2014-9783/ANY/0.patch

From 2b1050b49a9a5f7bb57006648d145e001a3eaa8b Mon Sep 17 00:00:00 2001
From: Hariram Purushothaman <hpurus@codeaurora.org>
Date: Wed, 31 Jul 2013 14:30:36 -0700
Subject: msm: camera: Fix various small issues in cci driver

Remove some unused ioctl exposed, Also add
some bound checks for ioctl user params.

Change-Id: Ifdd441fdb25fd20b005c4e4e1ebe4e203f1216ac
CRs-Fixed: 511382
Signed-off-by: Hariram Purushothaman <hpurus@codeaurora.org>
---
 .../platform/msm/camera_v2/sensor/cci/msm_cci.c    | 101 +++++++++++++--------
 include/media/msm_cam_sensor.h                     |   2 +
 2 files changed, 63 insertions(+), 40 deletions(-)

diff --git a/drivers/media/platform/msm/camera_v2/sensor/cci/msm_cci.c b/drivers/media/platform/msm/camera_v2/sensor/cci/msm_cci.c
index 7f4f231..6beb92e 100644
--- a/drivers/media/platform/msm/camera_v2/sensor/cci/msm_cci.c
+++ b/drivers/media/platform/msm/camera_v2/sensor/cci/msm_cci.c
@@ -41,6 +41,9 @@
 
 /* Max bytes that can be read per CCI read transaction */
 #define CCI_READ_MAX 12
+#define CCI_I2C_READ_MAX_RETRIES 3
+#define CCI_I2C_MAX_READ 8192
+#define CCI_I2C_MAX_WRITE 8192
 
 static struct v4l2_subdev *g_cci_subdev;
 
@@ -87,36 +90,6 @@ static void msm_cci_set_clk_param(struct cci_device *cci_dev)
 	return;
 }
 
-static int32_t msm_cci_i2c_config_sync_timer(struct v4l2_subdev *sd,
-	struct msm_camera_cci_ctrl *c_ctrl)
-{
-	struct cci_device *cci_dev;
-	cci_dev = v4l2_get_subdevdata(sd);
-	msm_camera_io_w(c_ctrl->cci_info->cid, cci_dev->base +
-		CCI_SET_CID_SYNC_TIMER_0_ADDR + (c_ctrl->cci_info->cid * 0x4));
-	return 0;
-}
-
-static int32_t msm_cci_i2c_set_freq(struct v4l2_subdev *sd,
-	struct msm_camera_cci_ctrl *c_ctrl)
-{
-	struct cci_device *cci_dev;
-	uint32_t val;
-	cci_dev = v4l2_get_subdevdata(sd);
-	val = c_ctrl->cci_info->freq;
-	msm_camera_io_w(val, cci_dev->base + CCI_I2C_M0_SCL_CTL_ADDR +
-		c_ctrl->cci_info->cci_i2c_master*0x100);
-	msm_camera_io_w(val, cci_dev->base + CCI_I2C_M0_SDA_CTL_0_ADDR +
-		c_ctrl->cci_info->cci_i2c_master*0x100);
-	msm_camera_io_w(val, cci_dev->base + CCI_I2C_M0_SDA_CTL_1_ADDR +
-		c_ctrl->cci_info->cci_i2c_master*0x100);
-	msm_camera_io_w(val, cci_dev->base + CCI_I2C_M0_SDA_CTL_2_ADDR +
-		c_ctrl->cci_info->cci_i2c_master*0x100);
-	msm_camera_io_w(val, cci_dev->base + CCI_I2C_M0_MISC_CTL_ADDR +
-		c_ctrl->cci_info->cci_i2c_master*0x100);
-	return 0;
-}
-
 static void msm_cci_flush_queue(struct cci_device *cci_dev,
 	enum cci_i2c_master_t master)
 {
@@ -213,8 +186,29 @@ static int32_t msm_cci_data_queue(struct cci_device *cci_dev,
 	uint16_t cmd_size = i2c_msg->size;
 	struct msm_camera_i2c_reg_conf *i2c_cmd = i2c_msg->reg_conf_tbl;
 	enum cci_i2c_master_t master = c_ctrl->cci_info->cci_i2c_master;
+
+	if (i2c_cmd == NULL) {
+		pr_err("%s:%d Failed line\n", __func__,
+			__LINE__);
+		return -EINVAL;
+	}
+
+	if ((!cmd_size) || (cmd_size > CCI_I2C_MAX_WRITE)) {
+		pr_err("%s:%d Failed line\n", __func__, __LINE__);
+		return -EINVAL;
+	}
+
 	CDBG("%s addr type %d data type %d\n", __func__,
 		i2c_msg->addr_type, i2c_msg->data_type);
+
+	if (i2c_msg->addr_type >= MSM_CAMERA_I2C_ADDR_TYPE_MAX) {
+		pr_err("%s failed line %d\n", __func__, __LINE__);
+		return -EINVAL;
+	}
+	if (i2c_msg->data_type >= MSM_CAMERA_I2C_DATA_TYPE_MAX) {
+		pr_err("%s failed line %d\n", __func__, __LINE__);
+		return -EINVAL;
+	}
 	/* assume total size within the max queue */
 	while (cmd_size) {
 		CDBG("%s cmd_size %d addr 0x%x data 0x%x", __func__,
@@ -321,6 +315,18 @@ static int32_t msm_cci_i2c_read(struct v4l2_subdev *sd,
 		goto ERROR;
 	}
 
+	if (c_ctrl->cci_info->retries > CCI_I2C_READ_MAX_RETRIES) {
+		pr_err("%s:%d More than max retries\n", __func__,
+			__LINE__);
+		goto ERROR;
+	}
+
+	if (read_cfg->data == NULL) {
+		pr_err("%s:%d Data ptr is NULL\n", __func__,
+			__LINE__);
+		goto ERROR;
+	}
+
 	CDBG("%s master %d, queue %d\n", __func__, master, queue);
 	CDBG("%s set param sid 0x%x retries %d id_map %d\n", __func__,
 		c_ctrl->cci_info->sid, c_ctrl->cci_info->retries,
@@ -341,6 +347,11 @@ static int32_t msm_cci_i2c_read(struct v4l2_subdev *sd,
 		goto ERROR;
 	}
 
+	if (read_cfg->addr_type >= MSM_CAMERA_I2C_ADDR_TYPE_MAX) {
+		CDBG("%s failed line %d\n", __func__, __LINE__);
+		goto ERROR;
+	}
+
 	if (read_cfg->addr_type == MSM_CAMERA_I2C_BYTE_ADDR)
 		val = CCI_I2C_WRITE_DISABLE_P_CMD | (read_cfg->addr_type << 4) |
 			((read_cfg->addr & 0xFF) << 8);
@@ -454,9 +465,14 @@ static int32_t msm_cci_i2c_read_bytes(struct v4l2_subdev *sd,
 		return -EINVAL;
 	}
 
+	if (c_ctrl->cci_info->cci_i2c_master > MASTER_MAX) {
+		pr_err("%s:%d Invalid I2C master addr\n", __func__, __LINE__);
+		return -EINVAL;
+	}
+
 	master = c_ctrl->cci_info->cci_i2c_master;
 	read_cfg = &c_ctrl->cfg.cci_i2c_read_cfg;
-	if (!read_cfg->num_byte) {
+	if ((!read_cfg->num_byte) || (read_cfg->num_byte > CCI_I2C_MAX_READ)) {
 		pr_err("%s:%d read num bytes 0\n", __func__, __LINE__);
 		rc = -EINVAL;
 		goto ERROR;
@@ -494,6 +510,10 @@ static int32_t msm_cci_i2c_write(struct v4l2_subdev *sd,
 	enum cci_i2c_master_t master;
 	enum cci_i2c_queue_t queue = QUEUE_0;
 	cci_dev = v4l2_get_subdevdata(sd);
+	if (c_ctrl->cci_info->cci_i2c_master > MASTER_MAX) {
+		pr_err("%s:%d Invalid I2C master addr\n", __func__, __LINE__);
+		return -EINVAL;
+	}
 	master = c_ctrl->cci_info->cci_i2c_master;
 	CDBG("%s master %d, queue %d\n", __func__, master, queue);
 	CDBG("%s set param sid 0x%x retries %d id_map %d\n", __func__,
@@ -514,6 +534,11 @@ static int32_t msm_cci_i2c_write(struct v4l2_subdev *sd,
 			__LINE__, rc);
 		goto ERROR;
 	}
+	if (c_ctrl->cci_info->retries > CCI_I2C_READ_MAX_RETRIES) {
+		pr_err("%s:%d More than max retries\n", __func__,
+			__LINE__);
+		goto ERROR;
+	}
 
 	val = CCI_I2C_SET_PARAM_CMD | c_ctrl->cci_info->sid << 4 |
 		c_ctrl->cci_info->retries << 16 |
@@ -533,7 +558,11 @@ static int32_t msm_cci_i2c_write(struct v4l2_subdev *sd,
 		goto ERROR;
 	}
 
-	msm_cci_data_queue(cci_dev, c_ctrl, queue);
+	rc = msm_cci_data_queue(cci_dev, c_ctrl, queue);
+	if (rc < 0) {
+		CDBG("%s failed line %d\n", __func__, __LINE__);
+		goto ERROR;
+	}
 	val = CCI_I2C_UNLOCK_CMD;
 	CDBG("%s:%d CCI_I2C_UNLOCK_CMD\n", __func__, __LINE__);
 	rc = msm_cci_write_i2c_queue(cci_dev, val, master, queue);
@@ -703,14 +732,6 @@ static int32_t msm_cci_config(struct v4l2_subdev *sd,
 	case MSM_CCI_RELEASE:
 		rc = msm_cci_release(sd);
 		break;
-	case MSM_CCI_SET_SID:
-		break;
-	case MSM_CCI_SET_FREQ:
-		rc = msm_cci_i2c_set_freq(sd, cci_ctrl);
-		break;
-	case MSM_CCI_SET_SYNC_CID:
-		rc = msm_cci_i2c_config_sync_timer(sd, cci_ctrl);
-		break;
 	case MSM_CCI_I2C_READ:
 		rc = msm_cci_i2c_read_bytes(sd, cci_ctrl);
 		break;
diff --git a/include/media/msm_cam_sensor.h b/include/media/msm_cam_sensor.h
index 2805401..da16bb8 100644
--- a/include/media/msm_cam_sensor.h
+++ b/include/media/msm_cam_sensor.h
@@ -52,6 +52,7 @@ enum msm_camera_i2c_reg_addr_type {
 	MSM_CAMERA_I2C_BYTE_ADDR = 1,
 	MSM_CAMERA_I2C_WORD_ADDR,
 	MSM_CAMERA_I2C_3B_ADDR,
+	MSM_CAMERA_I2C_ADDR_TYPE_MAX,
 };
 
 enum msm_camera_i2c_data_type {
@@ -62,6 +63,7 @@ enum msm_camera_i2c_data_type {
 	MSM_CAMERA_I2C_SET_WORD_MASK,
 	MSM_CAMERA_I2C_UNSET_WORD_MASK,
 	MSM_CAMERA_I2C_SET_BYTE_WRITE_MASK_DATA,
+	MSM_CAMERA_I2C_DATA_TYPE_MAX,
 };
 
 enum msm_sensor_power_seq_type_t {
-- 
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