1e149967a2
seapp_context files need to be explicitly labeled as they are now split
cross system and vendor and won't have the generic world readable
'system_file' label.
Bug: 36002414
Test: no new 'seapp_context' denials at boot complete on sailfish
Test: successfully booted into recovery without denials and sideloaded
OTA update.
Test: ./cts-tradefed run singleCommand cts --skip-device-info \
--skip-preconditions --skip-connectivity-check --abi \
arm64-v8a --module CtsSecurityHostTestCases -t \
android.security.cts.SELinuxHostTest#testAospSeappContexts
Test: Launch 'chrome' and succesfully load a website.
Test: Launch Camera and take a picture.
Test: Launch Camera and record a video, succesfully playback recorded
video
Change-Id: I19b3e50c6a7c292713d3e56ef0448acf6e4270f7
Signed-off-by: Sandeep Patil <sspatil@google.com>
131 lines
4.5 KiB
Text
131 lines
4.5 KiB
Text
# zygote
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typeattribute zygote coredomain;
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typeattribute zygote domain_deprecated;
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typeattribute zygote mlstrustedsubject;
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init_daemon_domain(zygote)
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read_runtime_log_tags(zygote)
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# Override DAC on files and switch uid/gid.
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allow zygote self:capability { dac_override setgid setuid fowner chown };
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# Drop capabilities from bounding set.
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allow zygote self:capability setpcap;
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# Switch SELinux context to app domains.
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allow zygote self:process setcurrent;
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allow zygote system_server:process dyntransition;
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allow zygote appdomain:process dyntransition;
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# Allow zygote to read app /proc/pid dirs (b/10455872).
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allow zygote appdomain:dir { getattr search };
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allow zygote appdomain:file { r_file_perms };
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# Move children into the peer process group.
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allow zygote system_server:process { getpgid setpgid };
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allow zygote appdomain:process { getpgid setpgid };
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# Read system data.
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allow zygote system_data_file:dir r_dir_perms;
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allow zygote system_data_file:file r_file_perms;
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# Write to /data/dalvik-cache.
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allow zygote dalvikcache_data_file:dir create_dir_perms;
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allow zygote dalvikcache_data_file:file create_file_perms;
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# Create symlinks in /data/dalvik-cache.
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allow zygote dalvikcache_data_file:lnk_file create_file_perms;
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# Write to /data/resource-cache.
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allow zygote resourcecache_data_file:dir rw_dir_perms;
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allow zygote resourcecache_data_file:file create_file_perms;
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# When WITH_DEXPREOPT is true, the zygote does not load executable content from
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# /data/dalvik-cache.
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allow { zygote with_dexpreopt(`-zygote') } dalvikcache_data_file:file execute;
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# Execute idmap and dex2oat within zygote's own domain.
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# TODO: Should either of these be transitioned to the same domain
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# used by installd or stay in-domain for zygote?
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allow zygote idmap_exec:file rx_file_perms;
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allow zygote dex2oat_exec:file rx_file_perms;
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# Control cgroups.
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allow zygote cgroup:dir create_dir_perms;
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allow zygote cgroup:{ file lnk_file } r_file_perms;
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allow zygote self:capability sys_admin;
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# Allow zygote to stat the files that it opens. The zygote must
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# be able to inspect them so that it can reopen them on fork
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# if necessary: b/30963384.
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allow zygote pmsg_device:chr_file getattr;
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allow zygote debugfs_trace_marker:file getattr;
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# Get seapp_contexts
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allow zygote seapp_contexts_file:file r_file_perms;
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# Check validity of SELinux context before use.
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selinux_check_context(zygote)
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# Check SELinux permissions.
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selinux_check_access(zygote)
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# Native bridge functionality requires that zygote replaces
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# /proc/cpuinfo with /system/lib/<ISA>/cpuinfo using a bind mount
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allow zygote proc_cpuinfo:file mounton;
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# Allow remounting rootfs as MS_SLAVE.
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allow zygote rootfs:dir mounton;
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allow zygote tmpfs:filesystem { mount unmount };
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allow zygote fuse:filesystem { unmount };
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allow zygote sdcardfs:filesystem { unmount };
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# Allow creating user-specific storage source if started before vold.
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allow zygote mnt_user_file:dir create_dir_perms;
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allow zygote mnt_user_file:lnk_file create_file_perms;
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# Allowed to mount user-specific storage into place
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allow zygote storage_file:dir { search mounton };
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# Handle --invoke-with command when launching Zygote with a wrapper command.
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allow zygote zygote_exec:file rx_file_perms;
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# Read access to pseudo filesystems.
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r_dir_file(zygote, proc_net)
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# Root fs.
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r_dir_file(zygote, rootfs)
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# System file accesses.
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r_dir_file(zygote, system_file)
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userdebug_or_eng(`
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# Allow zygote to create and write method traces in /data/misc/trace.
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allow zygote method_trace_data_file:dir w_dir_perms;
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allow zygote method_trace_data_file:file { create w_file_perms };
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')
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allow zygote ion_device:chr_file r_file_perms;
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allow zygote tmpfs:dir r_dir_perms;
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# Let the zygote access overlays so it can initialize the AssetManager.
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get_prop(zygote, overlay_prop)
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###
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### neverallow rules
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###
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# Ensure that all types assigned to app processes are included
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# in the appdomain attribute, so that all allow and neverallow rules
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# written on appdomain are applied to all app processes.
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# This is achieved by ensuring that it is impossible for zygote to
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# setcon (dyntransition) to any types other than those associated
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# with appdomain plus system_server.
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neverallow zygote ~{ appdomain system_server }:process dyntransition;
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# Zygote should never execute anything from /data except for /data/dalvik-cache files.
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neverallow zygote {
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data_file_type
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-dalvikcache_data_file # map PROT_EXEC
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}:file no_x_file_perms;
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# Do not allow access to Bluetooth-related system properties and files
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neverallow zygote bluetooth_prop:file create_file_perms;
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