d95488dce5
security_context_t happens to be a typedef for char*, and happens to begin with a string usable as a raw context string. But in reality, it is an opaque type that may or may not have additional information after the first NUL byte, where that additional information can include pointers that can only be freed via freecon(). Proof is from this valgrind run of daemon/libvirtd: ==6028== 839,169 (40 direct, 839,129 indirect) bytes in 1 blocks are definitely lost in loss record 274 of 274 ==6028== at 0x4A0515D: malloc (vg_replace_malloc.c:195) ==6028== by 0x3022E0D48C: selabel_open (label.c:165) ==6028== by 0x3022E11646: matchpathcon_init_prefix (matchpathcon.c:296) ==6028== by 0x3022E1190D: matchpathcon (matchpathcon.c:317) ==6028== by 0x4F9D842: SELinuxRestoreSecurityFileLabel (security_selinux.c:382) 800k is a lot of memory to be leaking. * src/storage/storage_backend.c (virStorageBackendUpdateVolTargetInfoFD): Avoid leak on error. * src/security/security_selinux.c (SELinuxReserveSecurityLabel, SELinuxGetSecurityProcessLabel) (SELinuxRestoreSecurityFileLabel): Use correct function to free security_context_t.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>