app.te: allow getopt/getattr on zygote socket

The closure of /dev/socket/zygote occurs in the zygote child
process, after Zygote has dropped privileges and changed
SELinux domains. In Google's internal tree, socket closures
are following a different path, which is causing getopt/getattr
to be used on the file descriptor. This is generating a large
number of denials.

Allow the operations for now. getopt/getattr are fairly harmless.
Long term, we shouldn't be performing these operations on the
zygote socket.

Addresses the following denials:

18.352783   type=1400 audit(1386374111.043:7): avc:  denied  { getattr } for  pid=682 comm="ndroid.systemui" path="socket:[9287]" dev="sockfs" ino=9287 scontext=u:r:platform_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
18.353088   type=1400 audit(1386374111.043:8): avc:  denied  { getopt } for  pid=682 comm="ndroid.systemui" path="/dev/socket/zygote" scontext=u:r:platform_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
18.833251   type=1400 audit(1386374111.524:9): avc:  denied  { getattr } for  pid=761 comm="d.process.acore" path="socket:[9287]" dev="sockfs" ino=9287 scontext=u:r:shared_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
18.833557   type=1400 audit(1386374111.524:10): avc:  denied  { getopt } for  pid=761 comm="d.process.acore" path="/dev/socket/zygote" scontext=u:r:shared_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
19.042419   type=1400 audit(1386374111.734:11): avc:  denied  { getattr } for  pid=806 comm="d.process.media" path="socket:[9287]" dev="sockfs" ino=9287 scontext=u:r:media_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
19.042724   type=1400 audit(1386374111.734:12): avc:  denied  { getopt } for  pid=806 comm="d.process.media" path="/dev/socket/zygote" scontext=u:r:media_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
19.182830   type=1400 audit(1386374111.874:14): avc:  denied  { getattr } for  pid=825 comm="putmethod.latin" path="socket:[9287]" dev="sockfs" ino=9287 scontext=u:r:untrusted_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
19.183105   type=1400 audit(1386374111.874:15): avc:  denied  { getopt } for  pid=825 comm="putmethod.latin" path="/dev/socket/zygote" scontext=u:r:untrusted_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket
19.235473   type=1400 audit(1386374111.924:16): avc:  denied  { getattr } for  pid=840 comm="ndroid.settings" path="socket:[9287]" dev="sockfs" ino=9287 scontext=u:r:system_app:s0 tcontext=u:r:zygote:s0 tclass=unix_stream_socket

Bug: 12061011
Change-Id: Ie1ec7636185aba7954656802e5eed735f49830c9

app.te

@@ -13,6 +13,10 @@ unix_socket_connect(appdomain, keystore, keystore)
 # Receive and use open file descriptors inherited from zygote.
 allow appdomain zygote:fd use;
 
+# Needed to close the zygote socket, which involves getopt / getattr
+# This should be deleted after b/12061011 is fixed
+allow appdomain zygote:unix_stream_socket { getopt getattr };
+
 # gdbserver for ndk-gdb reads the zygote.
 allow appdomain zygote_exec:file r_file_perms;