[Qemu-devel] [PATCH] vmdk: Widen before shifting 32 bit header field

[Fam Zheng]

Coverity spotted this.

The field is 32 bits, but if it's possible to overflow in 32 bit
left shift.

Signed-off-by: Fam Zheng <address@hidden>
---
 block/vmdk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/vmdk.c b/block/vmdk.c
index 8410a15..d72a6e8 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -523,7 +523,7 @@ static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
     }
     ret = vmdk_add_extent(bs, file, false,
                           le32_to_cpu(header.disk_sectors),
-                          le32_to_cpu(header.l1dir_offset) << 9,
+                          (int64_t)le32_to_cpu(header.l1dir_offset) << 9,
                           0,
                           le32_to_cpu(header.l1dir_size),
                           4096,
-- 
1.9.3