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security_classes
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Stephen Smalley authoredDefine new netlink socket security classes introduced by upstream kernel commit 6c6d2e9bde1c1c87a7ead806f8f5e2181d41a652 ("selinux: update netlink socket classes"). This was merged in Linux 4.2 and is therefore only required for Android kernels based on 4.2 or newer (e.g. the android-4.4 branch of the kernel/common tree). Add the new socket classes to socket_class_set. Add an initial set of allow rules although further refinement will likely be necessary. Any allow rule previously written on :netlink_socket may need to be rewritten or duplicated for one or more of the more specific classes. For now, we retain the existing :netlink_socket rules for compatibility on older kernels. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov>
(cherry picked from commit 01d95c23)
Change-Id: Ic00a0d474730cda91ba3bc387e0cc14482f82114Stephen Smalley authoredDefine new netlink socket security classes introduced by upstream kernel commit 6c6d2e9bde1c1c87a7ead806f8f5e2181d41a652 ("selinux: update netlink socket classes"). This was merged in Linux 4.2 and is therefore only required for Android kernels based on 4.2 or newer (e.g. the android-4.4 branch of the kernel/common tree). Add the new socket classes to socket_class_set. Add an initial set of allow rules although further refinement will likely be necessary. Any allow rule previously written on :netlink_socket may need to be rewritten or duplicated for one or more of the more specific classes. For now, we retain the existing :netlink_socket rules for compatibility on older kernels. Signed-off-by:Stephen Smalley <sds@tycho.nsa.gov>
(cherry picked from commit 01d95c23)
Change-Id: Ic00a0d474730cda91ba3bc387e0cc14482f82114
logd.te 943 B
# android user-space log manager
type logd, domain, mlstrustedsubject;
type logd_exec, exec_type, file_type;
init_daemon_domain(logd)
allow logd self:capability { setuid setgid sys_nice audit_control };
allow logd self:capability2 syslog;
allow logd self:netlink_audit_socket { create_socket_perms nlmsg_write };
allow logd kernel:system syslog_read;
allow logd kmsg_device:chr_file w_file_perms;
allow logd system_data_file:file r_file_perms;
r_dir_file(logd, domain)
allow logd kernel:system syslog_mod;
control_logd(logd)
###
### Neverallow rules
###
### logd should NEVER do any of this
# Block device access.
neverallow logd dev_type:blk_file { read write };
# ptrace any other app
neverallow logd domain:process ptrace;
# Write to /system.
neverallow logd system_file:dir_file_class_set write;
# Write to files in /data/data or system files on /data
neverallow logd { app_data_file system_data_file }:dir_file_class_set write;