c72b7d1731
SELinux has a separate file mmap permission in 4.14+ kernels. Add this
to dexoptanalyzer(d) in cases where it could already access files (in
particular, secondary dex files).
Addresses denials of the form:
avc: denied { map } for […] path="/data/data/[…]" […]
scontext=u:r:dexoptanalyzer:s0 tcontext=u:object_r:app_data_file:s0
Test: Reproduce steps in bug 138683603 on a device with a 4.14+ kernel
and check the absence of SELinux denials
Bug: 138683603
Change-Id: Ieba53eb431c0ba3914dcb5e5abdae667bd063555
36 lines
1.7 KiB
Plaintext
36 lines
1.7 KiB
Plaintext
# dexoptanalyzer
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type dexoptanalyzer, domain, coredomain, mlstrustedsubject;
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type dexoptanalyzer_exec, system_file_type, exec_type, file_type;
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type dexoptanalyzer_tmpfs, file_type;
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# Reading an APK opens a ZipArchive, which unpack to tmpfs.
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# Use tmpfs_domain() which will give tmpfs files created by dexoptanalyzer their
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# own label, which differs from other labels created by other processes.
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# This allows to distinguish in policy files created by dexoptanalyzer vs other
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#processes.
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tmpfs_domain(dexoptanalyzer)
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# Read symlinks in /data/dalvik-cache. This is required for PIC mode boot
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# app_data_file the oat file is symlinked to the original file in /system.
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allow dexoptanalyzer dalvikcache_data_file:dir { getattr search };
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allow dexoptanalyzer dalvikcache_data_file:file r_file_perms;
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allow dexoptanalyzer dalvikcache_data_file:lnk_file read;
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allow dexoptanalyzer installd:fd use;
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allow dexoptanalyzer installd:fifo_file { getattr write };
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# Acquire advisory lock on /system/framework/arm/*
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allow dexoptanalyzer system_file:file lock;
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# Allow reading secondary dex files that were reported by the app to the
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# package manager.
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allow dexoptanalyzer { privapp_data_file app_data_file }:dir { getattr search };
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allow dexoptanalyzer { privapp_data_file app_data_file }:file { getattr read map };
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# dexoptanalyzer calls access(2) with W_OK flag on app data. We can use the
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# "dontaudit...audit_access" policy line to suppress the audit access without
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# suppressing denial on actual access.
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dontaudit dexoptanalyzer { privapp_data_file app_data_file }:dir audit_access;
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# Allow testing /data/user/0 which symlinks to /data/data
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allow dexoptanalyzer system_data_file:lnk_file { getattr };
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