ea1bd5d68f
LMKD needs to be able to attach BPF tracepoints. It needs to be able to access tracefs, attach and run bpf programs. Test: m Test: Verified no denials with lmkd and libmemevents integration Bug: 244232958 Change-Id: I57248b729c0f011937bec139930ca9d24ba91c3b Signed-off-by: Carlos Galo <carlosgalo@google.com>
66 lines
3.7 KiB
Text
66 lines
3.7 KiB
Text
type bpfloader_exec, system_file_type, exec_type, file_type;
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typeattribute bpfloader bpfdomain;
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# allow bpfloader to write to the kernel log (starts early)
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allow bpfloader kmsg_device:chr_file w_file_perms;
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# These permissions are required to pin ebpf maps & programs.
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allow bpfloader bpffs_type:dir { add_name create remove_name search setattr write };
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allow bpfloader bpffs_type:file { create getattr read rename setattr };
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allow bpfloader bpffs_type:lnk_file { create getattr read };
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allow { bpffs_type -fs_bpf } fs_bpf:filesystem associate;
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# Allow bpfloader to create bpf maps and programs.
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allow bpfloader self:bpf { map_create map_read map_write prog_load prog_run };
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allow bpfloader self:capability { chown sys_admin net_admin };
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allow bpfloader sysfs_fs_fuse_bpf:file r_file_perms;
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allow bpfloader proc_bpf:file rw_file_perms;
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set_prop(bpfloader, bpf_progs_loaded_prop)
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allow bpfloader bpfloader_exec:file execute_no_trans;
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###
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### Neverallow rules
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###
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# Note: we don't care about getattr/mounton/search
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neverallow { domain } bpffs_type:dir ~{ add_name create getattr mounton remove_name search setattr write };
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neverallow { domain -bpfloader } bpffs_type:dir { add_name create remove_name setattr write };
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neverallow { domain } bpffs_type:file ~{ create getattr map open read rename setattr write };
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neverallow { domain -bpfloader } bpffs_type:file { create map open rename setattr };
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neverallow { domain -bpfloader -gpuservice -lmkd -mediaprovider_app -netd -netutils_wrapper -system_server } fs_bpf:file { getattr read };
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neverallow { domain -bpfloader } fs_bpf_loader:file { getattr read };
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neverallow { domain -bpfloader -network_stack } fs_bpf_net_private:file { getattr read };
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neverallow { domain -bpfloader -network_stack -system_server } fs_bpf_net_shared:file { getattr read };
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neverallow { domain -bpfloader -netd -network_stack -system_server } fs_bpf_netd_readonly:file { getattr read };
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neverallow { domain -bpfloader -netd -netutils_wrapper -network_stack -system_server } fs_bpf_netd_shared:file { getattr read };
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neverallow { domain -bpfloader -network_stack } fs_bpf_tethering:file { getattr read };
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neverallow { domain -bpfloader -uprobestats } fs_bpf_uprobestats:file { getattr read };
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neverallow { domain -bpfloader -gpuservice -lmkd -netd -netutils_wrapper -network_stack -system_server -uprobestats } { bpffs_type -fs_bpf_vendor }:file write;
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neverallow { domain -bpfloader } bpffs_type:lnk_file ~read;
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neverallow { domain -bpfdomain } bpffs_type:lnk_file read;
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neverallow { domain -bpfloader } *:bpf { map_create prog_load };
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neverallow { domain -bpfdomain } *:bpf { map_read map_write prog_run };
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# 'fs_bpf_loader' is for internal use of the BpfLoader oneshot boot time process.
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neverallow { domain -bpfloader } fs_bpf_loader:bpf *;
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neverallow { domain -bpfloader } fs_bpf_loader:file *;
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neverallow { domain -bpfloader -init } bpfloader_exec:file { execute execute_no_trans };
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neverallow { coredomain -bpfloader -netd -netutils_wrapper } fs_bpf_vendor:file *;
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neverallow bpfloader *:{ tcp_socket udp_socket rawip_socket } *;
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# No domain should be allowed to ptrace bpfloader
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neverallow { domain userdebug_or_eng(`-llkd') } bpfloader:process ptrace;
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neverallow { domain -bpfloader } proc_bpf:file write;
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