platform_system_sepolicy/public/sgdisk.te

# sgdisk called from vold
type sgdisk, domain;
type sgdisk_exec, system_file_type, exec_type, file_type;
Updated policy for external storage. An upcoming platform release is redesigning how external storage works. At a high level, vold is taking on a more active role in managing devices that dynamically appear. This change also creates further restricted domains for tools doing low-level access of external storage devices, including sgdisk and blkid. It also extends sdcardd to be launchable by vold, since launching by init will eventually go away. For compatibility, rules required to keep AOSP builds working are marked with "TODO" to eventually remove. Slightly relax system_server external storage rules to allow calls like statfs(). Still neverallow open file descriptors, since they can cause kernel to kill us. Here are the relevant violations that this CL is designed to allow: avc: denied { search } for name="user" dev="tmpfs" ino=7441 scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { getattr } for path="/mnt/user/0" dev="tmpfs" ino=6659 scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { write } for name="user" dev="tmpfs" ino=6658 scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { add_name } for name="10" scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { create } for name="10" scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { setattr } for name="10" dev="tmpfs" ino=11348 scontext=u:r:zygote:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { search } for name="/" dev="tmpfs" ino=3131 scontext=u:r:zygote:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { getattr } for path="/storage" dev="tmpfs" ino=6661 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { getattr } for path="/storage/self" dev="tmpfs" ino=6659 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { getattr } for path="/storage" dev="tmpfs" ino=6661 scontext=u:r:untrusted_app:s0:c522,c768 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { getattr } for path="/storage/self" dev="tmpfs" ino=11348 scontext=u:r:untrusted_app:s0:c522,c768 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { getattr } for path="/storage" dev="tmpfs" ino=6661 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { read } for name="/" dev="tmpfs" ino=6661 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { open } for name="/" dev="tmpfs" ino=6661 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { search } for name="/" dev="tmpfs" ino=6661 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { write } for name="data" dev="tmpfs" ino=11979 scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { add_name } for name="com.google.android.music" scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { create } for name="com.google.android.music" scontext=u:r:vold:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { use } for path="socket:[8297]" dev="sockfs" ino=8297 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { read write } for path="socket:[8297]" dev="sockfs" ino=8297 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=netlink_kobject_uevent_socket avc: denied { read } for path="pipe:[8298]" dev="pipefs" ino=8298 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=fifo_file avc: denied { write } for path="pipe:[8298]" dev="pipefs" ino=8298 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=fifo_file avc: denied { mounton } for path="/storage/emulated" dev="tmpfs" ino=8913 scontext=u:r:sdcardd:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { getattr } for path="/storage" dev="tmpfs" ino=7444 scontext=u:r:system_server:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { getattr } for path="/storage/self/primary" dev="tmpfs" ino=7447 scontext=u:r:system_server:s0 tcontext=u:object_r:storage_file:s0 tclass=lnk_file avc: denied { read } for name="primary" dev="tmpfs" ino=7447 scontext=u:r:system_server:s0 tcontext=u:object_r:storage_file:s0 tclass=lnk_file avc: denied { getattr } for path="/mnt/user" dev="tmpfs" ino=7441 scontext=u:r:system_server:s0 tcontext=u:object_r:mnt_user_file:s0 tclass=dir avc: denied { read } for name="disk:179,128" dev="tmpfs" ino=3224 scontext=u:r:sgdisk:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { open } for path="/dev/block/vold/disk:179,128" dev="tmpfs" ino=3224 scontext=u:r:sgdisk:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { getattr } for path="/dev/block/vold/disk:179,128" dev="tmpfs" ino=3224 scontext=u:r:sgdisk:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { read } for name="/" dev="fuse" ino=0 scontext=u:r:vold:s0 tcontext=u:object_r:fuse:s0 tclass=dir avc: denied { open } for path="/storage/public:81F3-13EC" dev="fuse" ino=0 scontext=u:r:vold:s0 tcontext=u:object_r:fuse:s0 tclass=dir avc: denied { write } for name="data" dev="fuse" ino=2 scontext=u:r:vold:s0 tcontext=u:object_r:fuse:s0 tclass=dir avc: denied { add_name } for name="com.google.android.googlequicksearchbox" scontext=u:r:vold:s0 tcontext=u:object_r:fuse:s0 tclass=dir avc: denied { create } for name="com.google.android.googlequicksearchbox" scontext=u:r:vold:s0 tcontext=u:object_r:fuse:s0 tclass=dir avc: denied { getattr } for path="/dev/block/vold/public:179,129" dev="tmpfs" ino=16953 scontext=u:r:blkid:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { read } for name="public:179,129" dev="tmpfs" ino=16953 scontext=u:r:blkid:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { open } for path="/dev/block/vold/public:179,129" dev="tmpfs" ino=16953 scontext=u:r:blkid:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { ioctl } for path="/dev/block/vold/public:179,129" dev="tmpfs" ino=16953 scontext=u:r:blkid:s0 tcontext=u:object_r:vold_device:s0 tclass=blk_file avc: denied { use } for path="pipe:[3264]" dev="pipefs" ino=3264 scontext=u:r:sgdisk:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { use } for path="pipe:[3264]" dev="pipefs" ino=3264 scontext=u:r:sgdisk:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { search } for name="block" dev="tmpfs" ino=2494 scontext=u:r:sgdisk:s0 tcontext=u:object_r:block_device:s0 tclass=dir avc: denied { use } for path="pipe:[4200]" dev="pipefs" ino=4200 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { use } for path="pipe:[4200]" dev="pipefs" ino=4200 scontext=u:r:sdcardd:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { search } for name="/" dev="tmpfs" ino=3131 scontext=u:r:sdcardd:s0 tcontext=u:object_r:storage_file:s0 tclass=dir avc: denied { search } for name="media_rw" dev="tmpfs" ino=3127 scontext=u:r:sdcardd:s0 tcontext=u:object_r:mnt_media_rw_file:s0 tclass=dir avc: denied { getattr } for path="pipe:[3648]" dev="pipefs" ino=3648 scontext=u:r:blkid:s0 tcontext=u:r:vold:s0 tclass=fifo_file avc: denied { use } for path="/dev/pts/12" dev="devpts" ino=15 scontext=u:r:fsck:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { use } for path="/dev/pts/12" dev="devpts" ino=15 scontext=u:r:fsck:s0 tcontext=u:r:vold:s0 tclass=fd avc: denied { use } for path="pipe:[4182]" dev="pipefs" ino=4182 scontext=u:r:fsck:s0 tcontext=u:r:vold:s0 tclass=fd Change-Id: Idf3b8561baecf7faa603fac5ababdcc5708288e1 2015-03-27 19:25:39 +01:00			`# sgdisk called from vold`
remove more domain_deprecated Test: no denials showing up in log collection Test: device boots Bug: 28760354 Change-Id: I089cfcf486464952fcbb52cce9f6152caf662c23 2016-12-10 04:30:39 +01:00			`type sgdisk, domain;`
Introduce system_file_type system_file_type is a new attribute used to identify files which exist on the /system partition. It's useful for allow rules in init, which are based off of a blacklist of writable files. Additionally, it's useful for constructing neverallow rules to prevent regressions. Additionally, add commented out tests which enforce that all files on the /system partition have the system_file_type attribute. These tests will be uncommented in a future change after all the device-specific policies are cleaned up. Test: Device boots and no obvious problems. Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5 2018-09-27 19:21:37 +02:00			`type sgdisk_exec, system_file_type, exec_type, file_type;`