msm: camera: eeprom: Add OOB read check for eeprom memory map

Add check to prevent OOB read of eeprom memory map.

Change-Id: Ifeeeffdc2a50536edbde5b5d755a052ace86d596
CRs-Fixed: 3003049
Signed-off-by: Shravan Nevatia <[email protected]>

drivers/cam_sensor_module/cam_eeprom/cam_eeprom_core.c

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -993,7 +994,15 @@ static int32_t cam_eeprom_init_pkt_parser(struct cam_eeprom_ctrl_t *e_ctrl,
 					rc = -EINVAL;
 					goto end;
 				}
+
+				if ((num_map + 1) >= (MSM_EEPROM_MAX_MEM_MAP_CNT *
+						MSM_EEPROM_MEMORY_MAP_MAX_SIZE)) {
+					CAM_ERR(CAM_EEPROM, "OOB map read error");
+					rc = -EINVAL;
+					goto end;
+				}
 				/* Configure the following map slave address */
+
 				map[num_map + 1].saddr = i2c_info->slave_addr;
 				rc = cam_eeprom_update_slaveInfo(e_ctrl,
 					cmd_buf);