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fatfs: Fix possible integer overflow in esp_vfs_fat_info()

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Adam Múdry
2022-05-20 14:51:11 +02:00
parent 7e71c0cff2
commit 2565acbc28
1 changed files with 2 additions and 2 deletions
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4
components/fatfs/vfs/vfs_fat.c
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@@ -222,8 +222,8 @@ esp_err_t esp_vfs_fat_info(const char* base_path,
errno = fresult_to_errno(res); errno = fresult_to_errno(res);
return ESP_FAIL; return ESP_FAIL;
} }
uint64_t total_sectors = (fs->n_fatent - 2) * fs->csize; uint64_t total_sectors = ((uint64_t)(fs->n_fatent - 2)) * fs->csize;
uint64_t free_sectors = free_clusters * fs->csize; uint64_t free_sectors = ((uint64_t)free_clusters) * fs->csize;
// Assuming the total size is < 4GiB, should be true for SPI Flash // Assuming the total size is < 4GiB, should be true for SPI Flash
if (out_total_bytes != NULL) { if (out_total_bytes != NULL) {