Re: [libvirt] [PATCH] Change label of fusefs mounted at /proc/meminfo in lxc containers

From: Dan Walsh <dwalsh(a)redhat.com&gt; We do not want to allow contained applications to be able to read fusefs_t. So we want /proc/meminfo label to match the system default proc_t. --- src/lxc/lxc_container.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c index ac0f69c..bba2e3a 100644 --- a/src/lxc/lxc_container.c +++ b/src/lxc/lxc_container.c @@ -52,6 +52,10 @@ # include <blkid/blkid.h> #endif +#if WITH_SELINUX +# include <selinux/selinux.h> +#endif + #include "virerror.h" #include "virlog.h" #include "lxc_container.h" @@ -763,6 +767,26 @@ static int lxcContainerMountProcFuse(virDomainDefPtr def, def->name)) < 0) return ret; +#if WITH_SELINUX + if (is_selinux_enabled() > 0) { + security_context_t scon; + ret = getfilecon("/proc/meminfo", &scon); + if (ret) {

+ virReportSystemError(errno, + _("Failed to get security context of %s for /proc/meminfo mount point"), + meminfo_path); + return ret;

+ } + ret = setfilecon(meminfo_path, scon); + freecon(scon); + if (ret) {

+ virReportSystemError(errno, + _("Failed to set security context of %s for /proc/meminfo mount point"), + meminfo_path); + return ret;

+ } + } +#endif if ((ret = mount(meminfo_path, "/proc/meminfo", NULL, MS_BIND, NULL)) < 0) { virReportSystemError(errno,