DivestOS/Patches/Linux_CVEs/CVE-2015-8938/ANY/0.patch

From 51c39420e3a49d1a7f05a77c64369b7623088238 Mon Sep 17 00:00:00 2001
From: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>
Date: Fri, 12 Dec 2014 04:20:59 -0800
Subject: msm: camera: isp: Validate input parameter for vfe_write and vfe_read

Validate input parameters for read and write operations in vfe to
ensure operations are performed within vfe register boundary and
within structure limits passed by caller.

Change-Id: If3719de65b32773c2b6ff904da76a951dbfb11eb
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>
---
 .../platform/msm/camera_v2/isp/msm_isp_util.c      | 126 +++++++++++++--------
 .../msm/camera_v2/sensor/io/msm_camera_io_util.c   |  11 ++
 .../msm/camera_v2/sensor/io/msm_camera_io_util.h   |   2 +
 3 files changed, 89 insertions(+), 50 deletions(-)

diff --git a/drivers/media/platform/msm/camera_v2/isp/msm_isp_util.c b/drivers/media/platform/msm/camera_v2/isp/msm_isp_util.c
index c598555..ff213fc 100644
--- a/drivers/media/platform/msm/camera_v2/isp/msm_isp_util.c
+++ b/drivers/media/platform/msm/camera_v2/isp/msm_isp_util.c
@@ -917,7 +917,8 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 	/* Validate input parameters */
 	switch (reg_cfg_cmd->cmd_type) {
 	case VFE_WRITE:
-	case VFE_READ: {
+	case VFE_READ:
+	case VFE_WRITE_MB: {
 		if ((reg_cfg_cmd->u.rw_info.reg_offset >
 			(UINT_MAX - reg_cfg_cmd->u.rw_info.len)) ||
 			((reg_cfg_cmd->u.rw_info.reg_offset +
@@ -943,6 +944,58 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 		}
 		break;
 	}
+
+	case VFE_WRITE_DMI_16BIT:
+	case VFE_WRITE_DMI_32BIT:
+	case VFE_WRITE_DMI_64BIT:
+	case VFE_READ_DMI_16BIT:
+	case VFE_READ_DMI_32BIT:
+	case VFE_READ_DMI_64BIT: {
+		if (reg_cfg_cmd->cmd_type == VFE_WRITE_DMI_64BIT) {
+			if ((reg_cfg_cmd->u.dmi_info.hi_tbl_offset <=
+				reg_cfg_cmd->u.dmi_info.lo_tbl_offset) ||
+				(reg_cfg_cmd->u.dmi_info.hi_tbl_offset -
+				reg_cfg_cmd->u.dmi_info.lo_tbl_offset !=
+				(sizeof(uint32_t)))) {
+				pr_err("%s:%d hi %d lo %d\n",
+					__func__, __LINE__,
+					reg_cfg_cmd->u.dmi_info.hi_tbl_offset,
+					reg_cfg_cmd->u.dmi_info.hi_tbl_offset);
+				return -EINVAL;
+			}
+			if (reg_cfg_cmd->u.dmi_info.len <= sizeof(uint32_t)) {
+				pr_err("%s:%d len %d\n",
+					__func__, __LINE__,
+					reg_cfg_cmd->u.dmi_info.len);
+				return -EINVAL;
+			}
+			if (((UINT_MAX -
+				reg_cfg_cmd->u.dmi_info.hi_tbl_offset) <
+				(reg_cfg_cmd->u.dmi_info.len -
+				sizeof(uint32_t))) ||
+				((reg_cfg_cmd->u.dmi_info.hi_tbl_offset +
+				reg_cfg_cmd->u.dmi_info.len -
+				sizeof(uint32_t)) > cmd_len)) {
+				pr_err("%s:%d hi_tbl_offset %d len %d cmd %d\n",
+					__func__, __LINE__,
+					reg_cfg_cmd->u.dmi_info.hi_tbl_offset,
+					reg_cfg_cmd->u.dmi_info.len, cmd_len);
+				return -EINVAL;
+			}
+		}
+		if ((reg_cfg_cmd->u.dmi_info.lo_tbl_offset >
+			(UINT_MAX - reg_cfg_cmd->u.dmi_info.len)) ||
+			((reg_cfg_cmd->u.dmi_info.lo_tbl_offset +
+			reg_cfg_cmd->u.dmi_info.len) > cmd_len)) {
+			pr_err("%s:%d lo_tbl_offset %d len %d cmd_len %d\n",
+				__func__, __LINE__,
+				reg_cfg_cmd->u.dmi_info.lo_tbl_offset,
+				reg_cfg_cmd->u.dmi_info.len, cmd_len);
+			return -EINVAL;
+		}
+		break;
+	}
+
 	default:
 		break;
 	}
@@ -956,39 +1009,27 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 		break;
 	}
 	case VFE_WRITE_MB: {
-		uint32_t *data_ptr = cfg_data +
-			reg_cfg_cmd->u.rw_info.cmd_data_offset/4;
-
-		if ((UINT_MAX - sizeof(*data_ptr) <
-					reg_cfg_cmd->u.rw_info.reg_offset) ||
-			(resource_size(vfe_dev->vfe_mem) <
-			reg_cfg_cmd->u.rw_info.reg_offset +
-			sizeof(*data_ptr))) {
-			pr_err("%s: VFE_WRITE_MB: Invalid length\n", __func__);
-			return -EINVAL;
-		}
-		msm_camera_io_w_mb(*data_ptr, vfe_dev->vfe_base +
-			reg_cfg_cmd->u.rw_info.reg_offset);
+		msm_camera_io_memcpy_mb(vfe_dev->vfe_base +
+			reg_cfg_cmd->u.rw_info.reg_offset,
+			cfg_data + reg_cfg_cmd->u.rw_info.cmd_data_offset/4,
+			reg_cfg_cmd->u.rw_info.len);
 		break;
 	}
 	case VFE_CFG_MASK: {
 		uint32_t temp;
-		if (resource_size(vfe_dev->vfe_mem) <
-				reg_cfg_cmd->u.mask_info.reg_offset)
-			return -EINVAL;
-		temp = msm_camera_io_r(vfe_dev->vfe_base +
-			reg_cfg_cmd->u.mask_info.reg_offset);
-
-		temp &= ~reg_cfg_cmd->u.mask_info.mask;
-		temp |= reg_cfg_cmd->u.mask_info.val;
 		if ((UINT_MAX - sizeof(temp) <
-					reg_cfg_cmd->u.mask_info.reg_offset) ||
+			reg_cfg_cmd->u.mask_info.reg_offset) ||
 			(resource_size(vfe_dev->vfe_mem) <
 			reg_cfg_cmd->u.mask_info.reg_offset +
 			sizeof(temp))) {
 			pr_err("%s: VFE_CFG_MASK: Invalid length\n", __func__);
 			return -EINVAL;
 		}
+		temp = msm_camera_io_r(vfe_dev->vfe_base +
+			reg_cfg_cmd->u.mask_info.reg_offset);
+
+		temp &= ~reg_cfg_cmd->u.mask_info.mask;
+		temp |= reg_cfg_cmd->u.mask_info.val;
 		msm_camera_io_w(temp, vfe_dev->vfe_base +
 			reg_cfg_cmd->u.mask_info.reg_offset);
 		break;
@@ -1000,24 +1041,9 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 		uint32_t *hi_tbl_ptr = NULL, *lo_tbl_ptr = NULL;
 		uint32_t hi_val, lo_val, lo_val1;
 		if (reg_cfg_cmd->cmd_type == VFE_WRITE_DMI_64BIT) {
-			if ((UINT_MAX - reg_cfg_cmd->u.dmi_info.hi_tbl_offset <
-						reg_cfg_cmd->u.dmi_info.len -
-						sizeof(uint32_t)) ||
-				(reg_cfg_cmd->u.dmi_info.hi_tbl_offset +
-				reg_cfg_cmd->u.dmi_info.len -
-					sizeof(uint32_t) > cmd_len)) {
-				pr_err("Invalid Hi Table out of bounds\n");
-				return -EINVAL;
-			}
 			hi_tbl_ptr = cfg_data +
 				reg_cfg_cmd->u.dmi_info.hi_tbl_offset/4;
 		}
-
-		if (reg_cfg_cmd->u.dmi_info.lo_tbl_offset +
-			reg_cfg_cmd->u.dmi_info.len > cmd_len) {
-			pr_err("Invalid Lo Table out of bounds\n");
-			return -EINVAL;
-		}
 		lo_tbl_ptr = cfg_data +
 			reg_cfg_cmd->u.dmi_info.lo_tbl_offset/4;
 		if (reg_cfg_cmd->cmd_type == VFE_WRITE_DMI_64BIT)
@@ -1050,24 +1076,17 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 		uint32_t *hi_tbl_ptr = NULL, *lo_tbl_ptr = NULL;
 		uint32_t hi_val, lo_val, lo_val1;
 		if (reg_cfg_cmd->cmd_type == VFE_READ_DMI_64BIT) {
-			if (reg_cfg_cmd->u.dmi_info.hi_tbl_offset +
-				reg_cfg_cmd->u.dmi_info.len -
-					sizeof(uint32_t) > cmd_len) {
-				pr_err("Invalid Hi Table out of bounds\n");
-				return -EINVAL;
-			}
 			hi_tbl_ptr = cfg_data +
 				reg_cfg_cmd->u.dmi_info.hi_tbl_offset/4;
 		}
 
-		if (reg_cfg_cmd->u.dmi_info.lo_tbl_offset +
-			reg_cfg_cmd->u.dmi_info.len > cmd_len) {
-			pr_err("Invalid Lo Table out of bounds\n");
-			return -EINVAL;
-		}
 		lo_tbl_ptr = cfg_data +
 			reg_cfg_cmd->u.dmi_info.lo_tbl_offset/4;
 
+		if (reg_cfg_cmd->cmd_type == VFE_READ_DMI_64BIT)
+			reg_cfg_cmd->u.dmi_info.len =
+				reg_cfg_cmd->u.dmi_info.len / 2;
+
 		for (i = 0; i < reg_cfg_cmd->u.dmi_info.len/4; i++) {
 			lo_val = msm_camera_io_r(vfe_dev->vfe_base +
 					vfe_dev->hw_info->dmi_reg_offset + 0x4);
@@ -1121,7 +1140,7 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 			if ((data_ptr < cfg_data) ||
 				(UINT_MAX / sizeof(*data_ptr) <
 				 (data_ptr - cfg_data)) ||
-				(sizeof(*data_ptr) * (data_ptr - cfg_data) >
+				(sizeof(*data_ptr) * (data_ptr - cfg_data) >=
 				 cmd_len))
 				return -EINVAL;
 			*data_ptr++ = msm_camera_io_r(vfe_dev->vfe_base +
@@ -1187,6 +1206,13 @@ static int msm_isp_send_hw_cmd(struct vfe_device *vfe_dev,
 	case SET_WM_UB_SIZE:
 		break;
 	case SET_UB_POLICY: {
+
+		if (cmd_len < sizeof(vfe_dev->vfe_ub_policy)) {
+			pr_err("%s:%d failed: invalid cmd len %u exp %zu\n",
+				__func__, __LINE__, cmd_len,
+				sizeof(vfe_dev->vfe_ub_policy));
+			return -EINVAL;
+		}
 		vfe_dev->vfe_ub_policy = *cfg_data;
 		break;
 	}
diff --git a/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.c b/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.c
index 78b9148..41c784a 100644
--- a/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.c
+++ b/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.c
@@ -102,6 +102,17 @@ void msm_camera_io_memcpy(void __iomem *dest_addr,
 	msm_camera_io_dump(dest_addr, len);
 }
 
+void msm_camera_io_memcpy_mb(void __iomem *dest_addr,
+	void __iomem *src_addr, u32 len)
+{
+	int i;
+	u32 *d = (u32 *) dest_addr;
+	u32 *s = (u32 *) src_addr;
+
+	for (i = 0; i < (len / 4); i++)
+		msm_camera_io_w_mb(*s++, d++);
+}
+
 int msm_cam_clk_sel_src(struct device *dev, struct msm_cam_clk_info *clk_info,
 		struct msm_cam_clk_info *clk_src_info, int num_clk)
 {
diff --git a/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.h b/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.h
index fa9a283..2a0e21c 100644
--- a/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.h
+++ b/drivers/media/platform/msm/camera_v2/sensor/io/msm_camera_io_util.h
@@ -38,6 +38,8 @@ u32 msm_camera_io_r_mb(void __iomem *addr);
 void msm_camera_io_dump(void __iomem *addr, int size);
 void msm_camera_io_memcpy(void __iomem *dest_addr,
 		void __iomem *src_addr, u32 len);
+void msm_camera_io_memcpy_mb(void __iomem *dest_addr,
+	void __iomem *src_addr, u32 len);
 int msm_cam_clk_sel_src(struct device *dev, struct msm_cam_clk_info *clk_info,
 		struct msm_cam_clk_info *clk_src_info, int num_clk);
 int msm_cam_clk_enable(struct device *dev, struct msm_cam_clk_info *clk_info,
-- 
cgit v1.1