Label /proc/meminfo.
Address the following denial:
m.chrome.canary: type=1400 audit(0.0:15): avc: granted { read open } for path="/proc/meminfo" dev="proc" ino=4026544360 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:proc:s0 tclass=file
(cherry-pick of internal commit: 971aeeda2138b27e3f8850f2fd7c95f60508154c)
Bug: 22032619
Chromium Bug: 586021
Change-Id: I2dcb2d4800bbc92ea47c37d4fd7a10f827a0114c
diff --git a/domain_deprecated.te b/domain_deprecated.te
index ed88cca..4da7a31 100644
--- a/domain_deprecated.te
+++ b/domain_deprecated.te
@@ -57,6 +57,7 @@
r_dir_file(domain_deprecated, sysfs)
r_dir_file(domain_deprecated, inotify)
r_dir_file(domain_deprecated, cgroup)
+r_dir_file(domain_deprecated, proc_meminfo)
r_dir_file(domain_deprecated, proc_net)
# Get SELinux enforcing status.
diff --git a/file.te b/file.te
index d205c56..1998669 100644
--- a/file.te
+++ b/file.te
@@ -14,6 +14,7 @@
type proc_bluetooth_writable, fs_type;
type proc_cpuinfo, fs_type;
type proc_iomem, fs_type;
+type proc_meminfo, fs_type;
type proc_net, fs_type;
type proc_sysrq, fs_type;
type proc_uid_cputime_showstat, fs_type;
diff --git a/genfs_contexts b/genfs_contexts
index 3f865c4..2700a94 100644
--- a/genfs_contexts
+++ b/genfs_contexts
@@ -3,6 +3,7 @@
# proc labeling can be further refined (longest matching prefix).
genfscon proc / u:object_r:proc:s0
genfscon proc /iomem u:object_r:proc_iomem:s0
+genfscon proc /meminfo u:object_r:proc_meminfo:s0
genfscon proc /net u:object_r:proc_net:s0
genfscon proc /net/xt_qtaguid/ctrl u:object_r:qtaguid_proc:s0
genfscon proc /cpuinfo u:object_r:proc_cpuinfo:s0
diff --git a/untrusted_app.te b/untrusted_app.te
index 1b2d89e..fd55653 100644
--- a/untrusted_app.te
+++ b/untrusted_app.te
@@ -89,9 +89,13 @@
# for files. Suppress the denials when they occur.
dontaudit untrusted_app exec_type:file getattr;
-# TODO: access of /proc/meminfo, give specific label or switch to
-# using meminfo service
+# TODO: switch to meminfo service
+allow untrusted_app proc_meminfo:file r_file_perms;
+
+# https://code.google.com/p/chromium/issues/detail?id=586021
allow untrusted_app proc:file r_file_perms;
+auditallow untrusted_app proc:file r_file_perms;
+
# access /proc/net/xt_qtguid/stats
r_dir_file(untrusted_app, proc_net)