a015186fab
Add /dev/kmsg_debug on userdebug devices, to allow crash_dump to log crashes to dmesg when logd isn't up yet (or is the one crashing). Bug: http://b/36574794 Test: stop tombstoned; crasher; dmesg Change-Id: I249e11291c58fee77098dec3fd3271ea23363ac9
61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
type crash_dump, domain;
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type crash_dump_exec, exec_type, file_type;
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allow crash_dump {
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domain
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-init
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-crash_dump
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-keystore
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-logd
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}:process { ptrace signal sigchld sigstop sigkill };
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# crash_dump might inherit CAP_SYS_PTRACE from a privileged process,
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# which will result in an audit log even when it's allowed to trace.
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dontaudit crash_dump self:capability { sys_ptrace };
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userdebug_or_eng(`
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allow crash_dump logd:process { ptrace signal sigchld sigstop sigkill };
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# Let crash_dump write to /dev/kmsg_debug crashes that happen before logd comes up.
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allow crash_dump kmsg_debug_device:chr_file { open append };
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')
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# Use inherited file descriptors
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allow crash_dump domain:fd use;
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# Write to the IPC pipe inherited from crashing processes.
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# Append to pipes given to us by processes requesting dumps (e.g. dumpstate)
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allow crash_dump domain:fifo_file { write append };
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r_dir_file(crash_dump, domain)
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allow crash_dump exec_type:file r_file_perms;
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# Read /data/dalvik-cache.
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allow crash_dump dalvikcache_data_file:dir { search getattr };
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allow crash_dump dalvikcache_data_file:file r_file_perms;
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# Read APK files.
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r_dir_file(crash_dump, apk_data_file);
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# Talk to tombstoned
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unix_socket_connect(crash_dump, tombstoned_crash, tombstoned)
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# Talk to ActivityManager.
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unix_socket_connect(crash_dump, system_ndebug, system_server)
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# Append to ANR files.
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allow crash_dump anr_data_file:file { append getattr };
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# Append to tombstone files.
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allow crash_dump tombstone_data_file:file { append getattr };
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read_logd(crash_dump)
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###
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### neverallow assertions
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###
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# A domain transition must occur for crash_dump to get the privileges needed to trace the process.
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# Do not allow the execution of crash_dump without a domain transition.
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neverallow domain crash_dump_exec:file execute_no_trans;
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