bff9801521
Remove the ioctl permission for most socket types. For others, such as tcp/udp/rawip/unix_dgram/unix_stream set a default unprivileged whitelist that individual domains may extend (except where neverallowed like untrusted_app). Enforce via a neverallowxperm rule. Change-Id: I15548d830f8eff1fd4d64005c5769ca2be8d4ffe
70 lines
2.3 KiB
Text
70 lines
2.3 KiB
Text
# android user-space log manager
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type logd, domain, domain_deprecated, mlstrustedsubject;
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type logd_exec, exec_type, file_type;
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init_daemon_domain(logd)
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# Read access to pseudo filesystems.
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r_dir_file(logd, cgroup)
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r_dir_file(logd, proc)
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r_dir_file(logd, proc_meminfo)
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r_dir_file(logd, proc_net)
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allow logd self:capability { setuid setgid setpcap sys_nice audit_control };
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allow logd self:capability2 syslog;
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allow logd self:netlink_audit_socket { create_socket_perms_no_ioctl nlmsg_write };
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allow logd kernel:system syslog_read;
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allow logd kmsg_device:chr_file w_file_perms;
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allow logd system_data_file:{ file lnk_file } r_file_perms;
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# logpersist is only allowed on userdebug and eng builds
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userdebug_or_eng(`
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allow logd misc_logd_file:file create_file_perms;
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allow logd misc_logd_file:dir rw_dir_perms;
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')
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allow logd pstorefs:dir search;
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allow logd pstorefs:file r_file_perms;
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# Set persist.sys. and sys.powerctl
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set_prop(logd, safemode_prop)
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set_prop(logd, powerctl_prop)
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# Access device logging gating property
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get_prop(logd, device_logging_prop)
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userdebug_or_eng(`get_prop(logd, logpersistd_logging_prop)')
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r_dir_file(logd, domain)
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allow logd kernel:system syslog_mod;
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control_logd(logd)
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# case where logpersistd is actually logcat -f in logd context (nee: logcatd)
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userdebug_or_eng(`
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unix_socket_connect(logd, logdr, logd)
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')
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###
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### Neverallow rules
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###
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### logd should NEVER do any of this
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# Block device access.
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neverallow logd dev_type:blk_file { read write };
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# ptrace any other app
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neverallow logd domain:process ptrace;
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# Write to /system.
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neverallow logd system_file:dir_file_class_set write;
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# Write to files in /data/data or system files on /data
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neverallow logd { app_data_file system_data_file }:dir_file_class_set write;
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# logd is not allowed to write anywhere other than /data/misc/logd, and then
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# only on userdebug or eng builds
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neverallow logd { file_type -logd_tmpfs userdebug_or_eng(` -misc_logd_file -coredump_file ') }:file { create write append };
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# logpersist is only allowed on userdebug/eng builds
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neverallow { domain userdebug_or_eng(`-logd -shell -dumpstate') } misc_logd_file:file no_rw_file_perms;
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neverallow { domain userdebug_or_eng(`-logd') } misc_logd_file:dir { add_name link relabelfrom remove_name rename reparent rmdir write };
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neverallow { domain -init } misc_logd_file:dir create;
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