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bootloader: Check all partitions fit inside configured flash size

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This commit is contained in:
Angus Gratton 2016-12-30 13:16:22 +11:00
parent 76e61ded30
commit 3783e28f0e
1 changed files with 15 additions and 4 deletions
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19
components/bootloader_support/src/flash_partitions.c
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@ -13,32 +13,43 @@
// limitations under the License.
#include "esp_flash_partitions.h"
#include "esp_log.h"
#include "rom/spi_flash.h"
static const char *TAG = "flash_parts";
esp_err_t esp_partition_table_basic_verify(const esp_partition_info_t *partition_table, bool log_errors, int *num_partitions)
{
int num_parts;
uint32_t chip_size = g_rom_flashchip.chip_size;
*num_partitions = 0;
for(num_parts = 0; num_parts < ESP_PARTITION_TABLE_MAX_ENTRIES; num_parts++) {
const esp_partition_info_t *part = &partition_table[num_parts];
if(part->magic == 0xFFFF
&& part->type == PART_TYPE_END
&& part->subtype == PART_SUBTYPE_END) {
if (part->magic == 0xFFFF
&& part->type == PART_TYPE_END
&& part->subtype == PART_SUBTYPE_END) {
/* TODO: check md5 */
ESP_LOGD(TAG, "partition table verified, %d entries", num_parts);
*num_partitions = num_parts;
return ESP_OK;
}
if(part->magic != ESP_PARTITION_MAGIC) {
if (part->magic != ESP_PARTITION_MAGIC) {
if (log_errors) {
ESP_LOGE(TAG, "partition %d invalid magic number 0x%x", num_parts, part->magic);
}
return ESP_ERR_INVALID_STATE;
}
const esp_partition_pos_t *pos = &part->pos;
if (pos->offset > chip_size || pos->offset + pos->size > chip_size) {
if (log_errors) {
ESP_LOGE(TAG, "partition %d invalid - offset 0x%x size 0x%x exceeds flash chip size 0x%x",
num_parts, pos->offset, pos->size, chip_size);
}
return ESP_ERR_INVALID_SIZE;
}
}
if (log_errors) {