audit: add support for fcaps v3

V3 namespaced file capabilities were introduced in
commit 8db6c34f1dbc ("Introduce v3 namespaced file capabilities")

Add support for these by adding the "frootid" field to the existing
fcaps fields in the NAME and BPRM_FCAPS records.

Please see github issue
https://github.com/linux-audit/audit-kernel/issues/103

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
[PM: comment tweak to fit an 80 char line width]
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 572d247957fb..c16beb25fd0a 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1358,6 +1358,9 @@ static void audit_log_exit(void)
                         audit_log_cap(ab, "pi", &axs->new_pcap.inheritable);
                         audit_log_cap(ab, "pe", &axs->new_pcap.effective);
                         audit_log_cap(ab, "pa", &axs->new_pcap.ambient);
+                        audit_log_format(ab, " frootid=%d",
+                                         from_kuid(&init_user_ns,
+                                                   axs->fcap.rootid));
                         break; }
 
                 }
@@ -2271,6 +2274,7 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
         ax->fcap.permitted = vcaps.permitted;
         ax->fcap.inheritable = vcaps.inheritable;
         ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+        ax->fcap.rootid = vcaps.rootid;
         ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
 
         ax->old_pcap.permitted   = old->cap_permitted;