Allow adbd / shell /data/anr access

The shell user needs to be able to run commands like
"cat /data/anr/traces.txt". Allow it.

We also need to be able to pull the file via adb.
"adb pull /data/anr/traces.txt". Allow it.

Addresses the following denials:

<4>[   20.212398] type=1400 audit(1402000262.433:11): avc: denied { getattr } for pid=1479 comm="adbd" path="/data/anr/traces.txt" dev="mmcblk0p28" ino=325763 scontext=u:r:adbd:s0 tcontext=u:object_r:anr_data_file:s0 tclass=file
<4>[   20.252182] type=1400 audit(1402000262.473:12): avc: denied { read } for pid=1479 comm="adbd" name="traces.txt" dev="mmcblk0p28" ino=325763 scontext=u:r:adbd:s0 tcontext=u:object_r:anr_data_file:s0 tclass=file
<4>[   20.252579] type=1400 audit(1402000262.473:13): avc: denied { open } for pid=1479 comm="adbd" name="traces.txt" dev="mmcblk0p28" ino=325763 scontext=u:r:adbd:s0 tcontext=u:object_r:anr_data_file:s0 tclass=file
<4>[   27.104068] type=1400 audit(1402000268.479:14): avc: denied { read } for pid=2377 comm="sh" name="traces.txt" dev="mmcblk0p28" ino=325763 scontext=u:r:shell:s0 tcontext=u:object_r:anr_data_file:s0 tclass=file

Bug: 15450720
Change-Id: I767102a7182895112838559b0ade1cd7c14459ab

adbd.te

@@ -39,6 +39,10 @@ allow adbd shell_data_file:file create_file_perms;
 allow adbd sdcard_type:dir create_dir_perms;
 allow adbd sdcard_type:file create_file_perms;
 
+# adb pull /data/anr/traces.txt
+allow adbd anr_data_file:dir r_dir_perms;
+allow adbd anr_data_file:file r_file_perms;
+
 # Set service.adb.*, sys.powerctl properties.
 unix_socket_connect(adbd, property, init)
 allow adbd shell_prop:property_service set;

shell.te

@@ -13,4 +13,8 @@ app_domain(shell)
 read_logd(shell)
 control_logd(shell)
 
+# read files in /data/anr
+allow shell anr_data_file:dir r_dir_perms;
+allow shell anr_data_file:file r_file_perms;
+
 # inherits from shelldomain.te