Re: [libvirt] [PATCH 06/26] storage: Resolve Coverity OVERFLOW_BEFORE_WIDEN

Coverity complains that when multiplying to 32 bit values that eventually will be stored in a 64 bit value that it's possible the math could overflow unless one of the values being multiplied is type cast to the proper size. Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- src/storage/storage_backend_disk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index cb6a8d5..abab1e1 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -560,7 +560,7 @@ virStorageBackendDiskPartBoundaries(virStoragePoolObjPtr pool, unsigned long long extraBytes = 0; unsigned long long alignedAllocation = allocation; virStoragePoolSourceDevicePtr dev = &pool->def->source.devices[0]; - unsigned long long cylinderSize = dev->geometry.heads * + unsigned long long cylinderSize = (unsigned long long)dev->geometry.heads * dev->geometry.sectors * SECTOR_SIZE; VIR_DEBUG("find free area: allocation %llu, cyl size %llu", allocation,