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qcow2: Avoid integer overflow in get_refcount (CVE-2014-0143)
authorKevin Wolf <kwolf@redhat.com>
Wed, 26 Mar 2014 12:05:49 +0000 (13:05 +0100)
committerStefan Hajnoczi <stefanha@redhat.com>
Tue, 1 Apr 2014 13:22:34 +0000 (15:22 +0200)
commitdb8a31d11d6a60f48d6817530640d75aa72a9a2f
tree0fffcea1fdacb11bf23995b276fdcfd5bd9b5dc3tree
parentb106ad9185f35fc4ad669555ad0e79e276083bd7commit | diff
qcow2: Avoid integer overflow in get_refcount (CVE-2014-0143)

This ensures that the checks catch all invalid cluster indexes
instead of returning the refcount of a wrong cluster.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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