The storageVolUpload function in storage/storage_driver.c in libvirt does not check a certain return value, which allows local users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted offset value in a virsh vol-upload command.<a href=http://cwe.mitre.org/data/definitions/476.html>CWE-476: NULL Pointer Dereference</a> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-8135
