be9b15c512
The netutils_wrapper is a process used by vendor code to update the
iptable rules on devices. When it update the rules for a specific chain.
The iptable module will reload the whole chain with the new rule. So
even the netutils_wrapper do not need to add any rules related to xt_bpf
module, it will still reloading the existing iptables rules about xt_bpf
module and need pass through the selinux check again when the rules are
reloading. So we have to grant it the permission to reuse the pinned
program in fs_bpf when it modifies the corresponding iptables chain so
the vendor module will not crash anymore.
Test: device boot and no more denials from netutils_wrapper
Bug: 72111305
Change-Id: I62bdfd922c8194c61b13e2855839aee3f1e349be
(cherry picked from aosp commit 2623ebcf8e)
28 lines
1.1 KiB
Text
28 lines
1.1 KiB
Text
# bpf program loader
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type bpfloader, domain;
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type bpfloader_exec, exec_type, file_type;
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typeattribute bpfloader coredomain;
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# Process need CAP_NET_ADMIN to run bpf programs as cgroup filter
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allow bpfloader self:global_capability_class_set net_admin;
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r_dir_file(bpfloader, cgroup_bpf)
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# These permission is required for pin bpf program for netd.
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allow bpfloader fs_bpf:dir create_dir_perms;
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allow bpfloader fs_bpf:file create_file_perms;
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allow bpfloader devpts:chr_file { read write };
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allow bpfloader netd:fd use;
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# Use pinned bpf map files from netd.
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allow bpfloader netd:bpf { map_read map_write };
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allow bpfloader self:bpf { prog_load prog_run };
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# Neverallow rules
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neverallow { domain -bpfloader } *:bpf prog_load;
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neverallow { domain -bpfloader -netd -netutils_wrapper} *:bpf prog_run;
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neverallow { domain -netd -bpfloader } bpfloader_exec:file { execute execute_no_trans };
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neverallow bpfloader domain:{ tcp_socket udp_socket rawip_socket } *;
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# only system_server, netd and bpfloader can read/write the bpf maps
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neverallow { domain -system_server -netd -bpfloader} netd:bpf { map_read map_write };
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