Both block_size and nb_block are unit32_t. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/storage/storage_backend_iscsi_direct.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/storage/storage_backend_iscsi_direct.c b/src/storage/storage_backend_iscsi_direct.c index 20997d5c5d..78dc4bd100 100644 --- a/src/storage/storage_backend_iscsi_direct.c +++ b/src/storage/storage_backend_iscsi_direct.c @@ -321,8 +321,8 @@ virISCSIDirectRefreshVol(virStoragePoolObjPtr pool, if (virISCSIDirectGetVolumeCapacity(iscsi, lun, &block_size, &nb_block) < 0) return -1; - vol->target.capacity = block_size * nb_block; - vol->target.allocation = block_size * nb_block; + vol->target.capacity = (unsigned long long)block_size * nb_block; + vol->target.allocation = (unsigned long long)block_size * nb_block; def->capacity += vol->target.capacity; def->allocation += vol->target.allocation;