1 files changed, 43 insertions, 0 deletions
diff --git a/fsck.te b/fsck.te
new file mode 100644
index 0000000..8c1aaf3
--- /dev/null
+++ b/fsck.te
@@ -0,0 +1,43 @@
+# Any fsck program run by init
+type fsck, domain;
+type fsck_exec, exec_type, file_type;
+
+init_daemon_domain(fsck)
+
+# /dev/__null__ created by init prior to policy load,
+# open fd inherited by fsck.
+allow fsck tmpfs:chr_file { read write ioctl };
+
+# Inherit and use pty created by android_fork_execvp_ext().
+allow fsck devpts:chr_file { read write ioctl getattr };
+
+# Allow stdin/out back to vold
+allow fsck vold:fd use;
+allow fsck vold:fifo_file { read write getattr };
+
+# Run fsck on certain block devices
+allow fsck block_device:dir search;
+allow fsck userdata_block_device:blk_file rw_file_perms;
+allow fsck cache_block_device:blk_file rw_file_perms;
+allow fsck dm_device:blk_file rw_file_perms;
+
+###
+### neverallow rules
+###
+
+# fsck should never be run on these block devices
+neverallow fsck {
+  boot_block_device
+  frp_block_device
+  metadata_block_device
+  recovery_block_device
+  root_block_device
+  swap_block_device
+  system_block_device
+  vold_device
+}:blk_file no_rw_file_perms;
+
+# Only allow entry from init or vold via fsck binaries
+neverallow { domain -init -vold } fsck:process transition;
+neverallow domain fsck:process dyntransition;
+neverallow fsck { file_type fs_type -fsck_exec }:file entrypoint;