From: Fam Zheng <famz@redhat.com>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, Fam Zheng <famz@redhat.com>,
armbru@redhat.com, Stefan Hajnoczi <stefanha@redhat.com>
Subject: [Qemu-devel] [PATCH] vmdk: Widen before shifting 32 bit header field
Date: Mon, 27 Apr 2015 22:23:01 +0800 [thread overview]
Message-ID: <1430144581-9803-1-git-send-email-famz@redhat.com> (raw)
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 <famz@redhat.com>
---
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
next reply other threads:[~2015-04-27 14:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-27 14:23 Fam Zheng [this message]
2015-04-27 17:07 ` [Qemu-devel] [PATCH] vmdk: Widen before shifting 32 bit header field John Snow
2015-04-28 12:54 ` Kevin Wolf
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