I expect that most people have only looked at the code of the subject/object labeling patch, and have not actually patched a kernel, compiled, and tested it. Thus, I'm pasting below a few snippets of the audit logs so that you can get an idea of what these labels look like, and how they're falling into place. At this point, the subj/obj label is simply appended onto the end of the existing audit record for the associated subject or object. Steve has mentioned that this will get more complicated when a given subject acts on multiple objects (though I haven't found a good way to test this behavior yet). Alternatively, the subj/obj label could exist as an auxiliary record and refer back to the owning record. This could work as well, but this is not how my patch is currently written. It's a little more complicated than what I have in place now, though probably doable without too much trouble. If there are strong feelings one way or another, let's please discuss them now. Examples follow. -- This is the /var/log/audit/audit.log output of a watch on chmod (auditctl -a exit,always -S chmod). Note the specified subject context attached to the syscall record (subj). Also note the specified object context attached to the path record (obj). type=SYSCALL msg=audit(1129732019.179:29): arch=40000003 syscall=15 success=yes exit=0 a0=80528a8 a1=1ed a2=805153c a3=8053a68 items=1 pid=3110 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 comm="chmod" exe="/bin/chmod" subj=root:system_r:unconfined_t type=CWD msg=audit(1129732019.179:29): cwd="/tmp" type=PATH msg=audit(1129732019.179:29): item=0 name="dustin" flags=1 inode=1638928 dev=fd:00 mode=0100777 ouid=500 ogid=500 rdev=00:00 obj=root:object_r:tmp_t And this is the /var/log/audit/audit.log output of a watch on ipc calls (auditctl -a exit,always -S ipc). I created a little test program that creates, sets, and removes a semaphore (which is where there are several records here). Note the subj field in the syscall record, and the obj field in the IPC record. type=SYSCALL msg=audit(1129732008.219:26): arch=40000003 syscall=117 success=yes exit=0 a0=3 a1=0 a2=0 a3=101 items=0 pid=3107 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 comm="a.out" exe="/tmp/a.out" subj=root:system_r:unconfined_t type=IPC msg=audit(1129732008.219:26): qbytes=0 iuid=2332033043 igid=4294966419 mode=ffff obj=system_u:system_r:unconfined_t type=SYSCALL msg=audit(1129732008.219:27): arch=40000003 syscall=117 success=yes exit=98306 a0=2 a1=0 a2=1 a3=1ff items=0 pid=3107 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 comm="a.out" exe="/tmp/a.out" subj=root:system_r:unconfined_t type=SYSCALL msg=audit(1129732008.219:28): arch=40000003 syscall=117 success=yes exit=0 a0=3 a1=18002 a2=0 a3=100 items=0 pid=3107 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 comm="a.out" exe="/tmp/a.out" subj=root:system_r:unconfined_t :-Dustin