[PATCH] auvirt: Add security context to "relabel{to, from}" AVC records

Marcelo Cerri
2012-02-10T13:58:30Z

With this patch, auvirt prints one more field for AVC records when using the
"--all-events" option. The target context is added to "relabelto" AVC records
and the source context to "relabelfrom" AVC records.
---
tools/auvirt/auvirt.c | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/tools/auvirt/auvirt.c b/tools/auvirt/auvirt.c
index e5c5ef6..9b71a3c 100644
--- a/tools/auvirt/auvirt.c
+++ b/tools/auvirt/auvirt.c
@@ -91,6 +91,7 @@ struct event {
char *comm;
char *seresult;
char *seperms;
+ char *context;
/* Fields to print proof information: */
struct record_id proof[4];
};
@@ -130,6 +131,7 @@ void event_free(struct event *event)
free(event->cgroup_class);
free(event->cgroup_detail);
free(event->cgroup_acl);
+ free(event->context);
free(event);
}
}
@@ -872,6 +874,18 @@ int process_avc(auparse_state_t *au)
avc->comm = copy_str(auparse_interpret_field(au));
if (auparse_find_field(au, "name"))
avc->target = copy_str(auparse_interpret_field(au));
+
+ /* get the context related to the permission that was denied. */
+ if (avc->seperms) {
+ const char *ctx = NULL;
+ if (strcmp("relabelfrom", avc->seperms) == 0) {
+ ctx = auparse_find_field(au, "scontext");
+ } else if (strcmp("relabelto", avc->seperms) == 0) {
+ ctx = auparse_find_field(au, "tcontext");
+ }
+ avc->context = copy_str(ctx);
+ }
+
add_proof(avc, au);
if (list_append(events, avc) == NULL) {
event_free(avc);
@@ -1140,7 +1154,8 @@ void print_event(struct event *event)
} else if (event->type == ET_AVC) {
printf("\t%-12.12s", N(event->seperms));
printf("\t%-10.10s", N(event->seresult));
- printf("\t%s\t%s", N(event->comm), N(event->target));
+ printf("\t%s\t%s\t%s", N(event->comm), N(event->target),
+ N(event->context));
}
printf("\n");

--
1.7.1