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android_system_sepolicy/public/sdcardd.te

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Move domain_deprecated into private policy This attribute is being actively removed from policy. Since attributes are not being versioned, partners must not be able to access and use this attribute. Move it from private and verify in the logs that rild and tee are not using these permissions. Bug: 38316109 Test: build and boot Marlin Test: Verify that rild and tee are not being granted any of these permissions. Change-Id: I31beeb5bdf3885195310b086c1af3432dc6a349b
2017-05-15 13:19:03 -07:00
type sdcardd, 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 10:21:37 -07:00
type sdcardd_exec, system_file_type, exec_type, file_type;
sdcard policy and fuse device label.
2012-05-31 06:44:51 -07:00
Confine sdcardd, but leave it permissive for now. Change-Id: I1eba1535d650a09ee7640cb7f3664202be4a0a55 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-10-29 11:42:39 -07:00
allow sdcardd cgroup:dir create_dir_perms;
allow sdcardd fuse_device:chr_file rw_file_perms;
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 11:25:39 -07:00
allow sdcardd rootfs:dir mounton; # TODO: deprecated in M
Allow sdcardd to remount sdcardfs Sdcardfs now supports bind mounts and remounts instead of needing several separate mounts bug: 30954918 Test: Enable Sdcardfs, verify mounts Change-Id: Id94713752a08ceeb6aea7d3c29a29d3293a9b0c8
2016-10-28 17:12:19 -07:00
allow sdcardd sdcardfs:filesystem remount;
Allow sdcardd tmpfs read access. Address the following denial: type=1400 audit(1453854842.899:7): avc: denied { search } for pid=1512 comm="sdcard" name="/" dev="tmpfs" ino=7547 scontext=u:r:sdcardd:s0 tcontext=u:object_r:tmpfs:s0 tclass=dir permissive=0 vold: EmulatedVolume calls sdcard to mount on /storage/emulated. Bug: 26807309 Change-Id: Ifdd7c356589f95165bba489dd06282a4087e9aee
2016-01-27 07:24:34 -08:00
allow sdcardd tmpfs:dir r_dir_perms;
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 11:25:39 -07:00
allow sdcardd mnt_media_rw_file:dir r_dir_perms;
allow sdcardd storage_file:dir search;
allow sdcardd storage_stub_file:dir { search mounton };
sdcardd: grant unmount If the sdcard daemon is restarted (crash or otherwise), one of the first things it attempts to do is umount the previously mounted /mnt/shell/emulated fuse filesystem, which is denied by SELinux with the following denial: sdcard : type=1400 audit(0.0:6997): avc: denied { unmount } for scontext=u:r:sdcardd:s0 tcontext=u:object_r:fuse:s0 tclass=filesystem permissive=0 Allow the operation. Steps to reproduce: 1) adb shell into the device and su to root 2) run "kill -9 [PID OF SDCARD] Expected: sdcard daemon successfully restarts without error message. Actual: SELinux denial above, plus attempts to mount a new filesystem on top of the existing filesystem. (cherrypicked from commit abfd427a3226a8bb696e5e5b9239f5445a680f6c) Bug: 17383009 Change-Id: I386bfc98e2b5b32b1d11408f7cfbd6e3c1af68f4
2014-09-04 11:04:23 -07:00
allow sdcardd sdcard_type:filesystem { mount unmount };
sepolicy: grant dac_read_search to domains with dac_override kernel commit 2a4c22426955d4fc04069811997b7390c0fb858e (fs: switch order of CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH checks) swapped the order of dac_override and dac_read_search checks. Domains that have dac_override will now generate spurious denials for dac_read_search unless they also have that permission. Since dac_override is a strict superset of dac_read_search, grant dac_read_search to all domains that already have dac_override to get rid of the denials. Bug: 114280985 Bug: crbug.com/877588 Test: Booted on a device running 4.14. Change-Id: I5c1c136b775cceeb7f170e139e8d4279e73267a4
2018-09-06 15:19:40 -07:00
allow sdcardd self:global_capability_class_set { setuid setgid dac_override dac_read_search sys_admin sys_resource };
Label /data/media with its own type and allow access. /data/media presently is left in system_data_file, which requires anything that wants to write to it to be able to write to system_data_file. Introduce a new type for /data/media, media_rw_data_file (to match the media_rw UID assigned to it and distinguish it from /data/misc/media which has media UID and media_data_file type), and allow access to it. We allow this for all platform app domains as WRITE_MEDIA_STORAGE permission is granted to signature|system. We should not have to allow it to untrusted_app. Set up type transitions in sdcardd to automatically label any directories or files it creates with the new type. Change-Id: I5c7e6245b854a9213099e40a41d9583755d37d42 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-12-17 11:39:35 -08:00
Allow sdcardd to write to sdcard directory and file. Should resolve b/13060688 - emulator writes to /storage/sdcard failing. Change-Id: I9f00d9dfcd1c4f84c2320628257beca71abf170b Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2014-02-18 06:19:28 -08:00
allow sdcardd sdcard_type:dir create_dir_perms;
allow sdcardd sdcard_type:file create_file_perms;
Label /data/media with its own type and allow access. /data/media presently is left in system_data_file, which requires anything that wants to write to it to be able to write to system_data_file. Introduce a new type for /data/media, media_rw_data_file (to match the media_rw UID assigned to it and distinguish it from /data/misc/media which has media UID and media_data_file type), and allow access to it. We allow this for all platform app domains as WRITE_MEDIA_STORAGE permission is granted to signature|system. We should not have to allow it to untrusted_app. Set up type transitions in sdcardd to automatically label any directories or files it creates with the new type. Change-Id: I5c7e6245b854a9213099e40a41d9583755d37d42 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-12-17 11:39:35 -08:00
allow sdcardd media_rw_data_file:dir create_dir_perms;
allow sdcardd media_rw_data_file:file create_file_perms;
Confine sdcardd, but leave it permissive for now. Change-Id: I1eba1535d650a09ee7640cb7f3664202be4a0a55 Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
2013-10-29 11:42:39 -07:00
# Read /data/system/packages.list.
allow sdcardd system_data_file:file r_file_perms;
Relabel /data/system/packages.list to new type. Conservatively grant access to packages_list_file to everything that had access to system_data_file:file even if the comment in the SELinux policy suggests it was for another use. Ran a diff on the resulting SEPolicy, the only difference of domains being granted is those that had system_data_file:dir permissiosn which is clearly not applicable for packages.list diff -u0 <(sesearch --allow -t system_data_file ~/sepolicy | sed 's/system_data_file/packages_list_file/') <(sesearch --allow -t packages_list_file ~/sepolicy_new) --- /proc/self/fd/16 2019-03-19 20:01:44.378409146 +0000 +++ /proc/self/fd/18 2019-03-19 20:01:44.378409146 +0000 @@ -3 +2,0 @@ -allow appdomain packages_list_file:dir getattr; @@ -6 +4,0 @@ -allow coredomain packages_list_file:dir getattr; @@ -8 +5,0 @@ -allow domain packages_list_file:dir search; @@ -35 +31,0 @@ -allow system_server packages_list_file:dir { rename search setattr read lock create reparent getattr write relabelfrom ioctl rmdir remove_name open add_name }; @@ -40 +35,0 @@ -allow tee packages_list_file:dir { search read lock getattr ioctl open }; @@ -43,3 +37,0 @@ -allow traced_probes packages_list_file:dir { read getattr open search }; -allow vendor_init packages_list_file:dir { search setattr read create getattr write relabelfrom ioctl rmdir remove_name open add_name }; -allow vold packages_list_file:dir { search setattr read lock create getattr mounton write ioctl rmdir remove_name open add_name }; @@ -48 +39,0 @@ -allow vold_prepare_subdirs packages_list_file:dir { read write relabelfrom rmdir remove_name open add_name }; @@ -50 +40,0 @@ -allow zygote packages_list_file:dir { search read lock getattr ioctl open }; Bug: 123186697 Change-Id: Ieabf313653deb5314872b63cd47dadd535af7b07
2019-03-19 11:14:38 -07:00
allow sdcardd packages_list_file:file r_file_perms;
Allow sdcardd to read /data/.layout_version As described in the system/core commit with the same Change-Id, there's a race condition between installd and sdcard when it comes to accessing /data/media. Resolve the race by checking /data/.layout_version to make sure the filesystem has been upgraded. Maybe indirectly fixes the following SELinux denial: sdcard : type=1400 audit(0.0:3): avc: denied { write } for name="media" dev="mmcblk0p17" ino=102753 scontext=u:r:sdcardd:s0 tcontext=u:object_r:system_data_file:s0 tclass=dir (cherrypicked from commit 792d8650d3dd5e0362a2a04a0af77f751a84b1de) Bug: 16329437 Change-Id: I5e164f08009c1036469f8734ec07cbae9c5e262b
2014-07-24 17:07:27 -07:00
Move layout_version to /data/misc/installd Bug: 139543295 Test: Boot, ensure file is properly created Change-Id: I577b25bcf61505970b153884d8ac3567957bb50a
2019-08-16 13:41:55 -07:00
# Read /data/misc/installd/layout_version
Allow sdcardd to read /data/.layout_version As described in the system/core commit with the same Change-Id, there's a race condition between installd and sdcard when it comes to accessing /data/media. Resolve the race by checking /data/.layout_version to make sure the filesystem has been upgraded. Maybe indirectly fixes the following SELinux denial: sdcard : type=1400 audit(0.0:3): avc: denied { write } for name="media" dev="mmcblk0p17" ino=102753 scontext=u:r:sdcardd:s0 tcontext=u:object_r:system_data_file:s0 tclass=dir (cherrypicked from commit 792d8650d3dd5e0362a2a04a0af77f751a84b1de) Bug: 16329437 Change-Id: I5e164f08009c1036469f8734ec07cbae9c5e262b
2014-07-24 17:07:27 -07:00
allow sdcardd install_data_file:file r_file_perms;
Move layout_version to /data/misc/installd Bug: 139543295 Test: Boot, ensure file is properly created Change-Id: I577b25bcf61505970b153884d8ac3567957bb50a
2019-08-16 13:41:55 -07:00
allow sdcardd install_data_file:dir search;
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 11:25:39 -07:00
# Allow stdin/out back to vold
allow sdcardd vold:fd use;
allow sdcardd vold:fifo_file { read write getattr };
Allow sdcard daemon to run above expanded storage. We have a /media directory on expanded storage that behaves just like internal storage, and has a FUSE daemon running above it. avc: denied { search } for name="expand" dev="tmpfs" ino=3130 scontext=u:r:sdcardd:s0 tcontext=u:object_r:mnt_expand_file:s0 tclass=dir permissive=0 Bug: 19993667 Change-Id: I771ecb8f2808c48ccf4139ac9cfc2a48a2332fec
2015-04-11 22:10:20 -07:00
# Allow running on top of expanded storage
allow sdcardd mnt_expand_file:dir search;
sdcardd: ensure that init never executes sdcard daemon Only vold should execute the sdcard daemon. Remove old code which allows this, and add a neverallow rule to ensure that nobody tries running with this old configuration. Change-Id: I6d0133e65948ae69e3c48f7b5f21fc7956fe8168
2015-06-11 20:47:59 -07:00
Remove logspam Grant observed uses of permissions being audited in domain_deprecated. fsck avc: granted { getattr } for path="/" dev="dm-0" ino=2 scontext=u:r:fsck:s0 tcontext=u:object_r:rootfs:s0 tclass=dir keystore avc: granted { read open } for path="/vendor/lib64/hw" dev="dm-1" ino=168 scontext=u:r:keystore:s0 tcontext=u:object_r:system_file:s0 tclass=dir sdcardd avc: granted { read open } for path="/proc/filesystems" dev="proc" ino=4026532412 scontext=u:r:sdcardd:s0 tcontext=u:object_r:proc:s0 tclass=file update_engine avc: granted { getattr } for path="/proc/misc" dev="proc" ino=4026532139 scontext=u:r:update_engine:s0 tcontext=u:object_r:proc:s0 tclass=file avc: granted { read open } for path="/proc/misc" dev="proc" ino=4026532139 scontext=u:r:update_engine:s0 tcontext=u:object_r:proc:s0 tclass=file avc: granted { read } for name="hw" dev="dm-1" ino=168 scontext=u:r:update_engine:s0 tcontext=u:object_r:system_file:s0 tclass=dir vold avc: granted { read open } for path="/vendor/lib64/hw" dev="dm-1" ino=168 scontext=u:r:vold:s0 tcontext=u:object_r:system_file:s0 tclass=dir Test: Marlin builds and boots, avc granted messages no longer observed. Bug: 35197529 Change-Id: Iae34ae3b9e22ba7550cf7d45dc011ab043e63424
2017-02-10 09:39:37 -08:00
# access /proc/filesystems
Sync internal master and AOSP sepolicy. Bug: 37916906 Test: Builds 'n' boots. Change-Id: Ia1d86264446ebecc1ca79f32f11354921bc77668 Merged-In: I208ec6a864127a059fb389417a9c6b259d7474cb
2017-09-26 12:58:29 -07:00
allow sdcardd proc_filesystems:file r_file_perms;
Remove logspam Grant observed uses of permissions being audited in domain_deprecated. fsck avc: granted { getattr } for path="/" dev="dm-0" ino=2 scontext=u:r:fsck:s0 tcontext=u:object_r:rootfs:s0 tclass=dir keystore avc: granted { read open } for path="/vendor/lib64/hw" dev="dm-1" ino=168 scontext=u:r:keystore:s0 tcontext=u:object_r:system_file:s0 tclass=dir sdcardd avc: granted { read open } for path="/proc/filesystems" dev="proc" ino=4026532412 scontext=u:r:sdcardd:s0 tcontext=u:object_r:proc:s0 tclass=file update_engine avc: granted { getattr } for path="/proc/misc" dev="proc" ino=4026532139 scontext=u:r:update_engine:s0 tcontext=u:object_r:proc:s0 tclass=file avc: granted { read open } for path="/proc/misc" dev="proc" ino=4026532139 scontext=u:r:update_engine:s0 tcontext=u:object_r:proc:s0 tclass=file avc: granted { read } for name="hw" dev="dm-1" ino=168 scontext=u:r:update_engine:s0 tcontext=u:object_r:system_file:s0 tclass=dir vold avc: granted { read open } for path="/vendor/lib64/hw" dev="dm-1" ino=168 scontext=u:r:vold:s0 tcontext=u:object_r:system_file:s0 tclass=dir Test: Marlin builds and boots, avc granted messages no longer observed. Bug: 35197529 Change-Id: Iae34ae3b9e22ba7550cf7d45dc011ab043e63424
2017-02-10 09:39:37 -08:00
sdcardd: ensure that init never executes sdcard daemon Only vold should execute the sdcard daemon. Remove old code which allows this, and add a neverallow rule to ensure that nobody tries running with this old configuration. Change-Id: I6d0133e65948ae69e3c48f7b5f21fc7956fe8168
2015-06-11 20:47:59 -07:00
###
### neverallow rules
###
# The sdcard daemon should no longer be started from init
neverallow init sdcardd_exec:file execute;
neverallow init sdcardd:process { transition dyntransition };
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