d30060a0cb
Address recent installd denials resulting from the recent
tightening of installd access to /data file types, including:
avc: denied { unlink } for name="._playmusicid" dev="mmcblk0p30" ino=1038393 scontext=u:r:installd:s0 tcontext=u:object_r:media_rw_data_file:s0 tclass=file
avc: denied { search } for pid=195 comm="installd" name="app-asec" dev="mmcblk0p28" ino=578225 scontext=u:r:installd:s0 tcontext=u:object_r:asec_image_file:s0 tclass=dir
Change-Id: I957738139678699949da9ad09d3bddb91605f8cf
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
68 lines
3.3 KiB
Text
68 lines
3.3 KiB
Text
# installer daemon
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type installd, domain;
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type installd_exec, exec_type, file_type;
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init_daemon_domain(installd)
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typeattribute installd mlstrustedsubject;
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allow installd self:capability { chown dac_override fowner fsetid setgid setuid };
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allow installd apk_data_file:file r_file_perms;
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allow installd asec_apk_file:file r_file_perms;
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allow installd apk_tmp_file:file r_file_perms;
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allow installd oemfs:dir r_dir_perms;
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allow installd oemfs:file r_file_perms;
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allow installd system_file:file x_file_perms;
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allow installd cgroup:dir create_dir_perms;
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# Check validity of SELinux context before use.
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selinux_check_context(installd)
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# Read /seapp_contexts and /data/security/seapp_contexts
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security_access_policy(installd)
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# Search /data/app-asec.
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allow installd asec_image_file:dir search;
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# Create /data/user and /data/user/0 if necessary.
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# Also required to initially create /data/data subdirectories
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# and lib symlinks before the setfilecon call. May want to
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# move symlink creation after setfilecon in installd.
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allow installd system_data_file:dir create_dir_perms;
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allow installd system_data_file:lnk_file { create setattr unlink };
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# Upgrade /data/media for multi-user if necessary.
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allow installd media_rw_data_file:dir create_dir_perms;
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allow installd media_rw_data_file:file unlink;
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# restorecon new /data/media directory.
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allow installd system_data_file:dir relabelfrom;
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allow installd media_rw_data_file:dir relabelto;
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# Create /data/.layout_version.* file
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type_transition installd system_data_file:file install_data_file;
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allow installd install_data_file:file create_file_perms;
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# Create files under /data/dalvik-cache.
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allow installd dalvikcache_data_file:dir create_dir_perms;
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allow installd dalvikcache_data_file:file create_file_perms;
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# Create /data/dalvik-cache/profiles.
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allow installd dalvikcache_data_file:dir relabelfrom;
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allow installd dalvikcache_profiles_data_file:dir relabelto;
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allow installd dalvikcache_profiles_data_file:dir rw_dir_perms;
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allow installd dalvikcache_profiles_data_file:file create_file_perms;
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# Upgrade from unlabeled userdata.
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# Just need enough to relabel it.
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allow installd unlabeled:dir { getattr search relabelfrom };
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allow installd unlabeled:notdevfile_class_set { getattr relabelfrom };
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# Upgrade from before system_app_data_file was used for system UID apps.
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# Just need enough to relabel it and to unlink removed package files.
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# Directory access covered by earlier rule above.
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allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink };
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# Manage /data/data subdirectories, including initially labeling them
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# upon creation via setfilecon or running restorecon_recursive,
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# setting owner/mode, creating symlinks within them, and deleting them
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# upon package uninstall.
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# Types extracted from seapp_contexts type= fields.
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allow installd { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:dir { create_dir_perms relabelfrom relabelto };
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allow installd { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:lnk_file { create setattr getattr unlink rename relabelfrom relabelto };
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allow installd { system_app_data_file bluetooth_data_file nfc_data_file radio_data_file shell_data_file app_data_file }:{ file sock_file fifo_file } { getattr unlink rename relabelfrom relabelto };
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