Split zygote's seccomp filter into two
To pave the way to reducing app's kernel attack surface, this change
split the single filter into one for system and one for apps. Note that
there is current no change between them.
Zygote will apply these filters appropriately to system server and apps.
Keep set_seccomp_filter() for now until the caller has switched to the
new API, which I will do immediately after this before the two filters
diverse.
Also remove get_seccomp_filter() since it doesn't seem to be used
anyway.
Test: diff the generated code, no difference except the variable names
Test: cts -m CtsSecurityTestCases -t android.security.cts.SeccompTest
Bug: 63944145
Change-Id: Id8ba05a87332c92ec697926af77bc5742eb04b23
diff --git a/libc/seccomp/arm64_system_policy.cpp b/libc/seccomp/arm64_system_policy.cpp
new file mode 100644
index 0000000..a8d7193
--- /dev/null
+++ b/libc/seccomp/arm64_system_policy.cpp
@@ -0,0 +1,43 @@
+// Autogenerated file - edit at your peril!!
+
+#include <linux/filter.h>
+#include <errno.h>
+
+#include "seccomp_bpfs.h"
+const sock_filter arm64_system_filter[] = {
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 0, 0, 32),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 220, 15, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 101, 7, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 43, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 19, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 18, 27, 26), //io_setup|io_destroy|io_submit|io_cancel|io_getevents|setxattr|lsetxattr|fsetxattr|getxattr|lgetxattr|fgetxattr|listxattr|llistxattr|flistxattr|removexattr|lremovexattr|fremovexattr|getcwd
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 42, 26, 25), //eventfd2|epoll_create1|epoll_ctl|epoll_pwait|dup|dup3|fcntl|inotify_init1|inotify_add_watch|inotify_rm_watch|ioctl|ioprio_set|ioprio_get|flock|mknodat|mkdirat|unlinkat|symlinkat|linkat|renameat|umount2|mount|pivot_root
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 59, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 58, 24, 23), //statfs|fstatfs|truncate|ftruncate|fallocate|faccessat|chdir|fchdir|chroot|fchmod|fchmodat|fchownat|fchown|openat|close
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 99, 23, 22), //pipe2|quotactl|getdents64|lseek|read|write|readv|writev|pread64|pwrite64|preadv|pwritev|sendfile|pselect6|ppoll|signalfd4|vmsplice|splice|tee|readlinkat|newfstatat|fstat|sync|fsync|fdatasync|sync_file_range|timerfd_create|timerfd_settime|timerfd_gettime|utimensat|acct|capget|capset|personality|exit|exit_group|waitid|set_tid_address|unshare|futex
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 198, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 105, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 104, 20, 19), //nanosleep|getitimer|setitimer
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 180, 19, 18), //init_module|delete_module|timer_create|timer_gettime|timer_getoverrun|timer_settime|timer_delete|clock_settime|clock_gettime|clock_getres|clock_nanosleep|syslog|ptrace|sched_setparam|sched_setscheduler|sched_getscheduler|sched_getparam|sched_setaffinity|sched_getaffinity|sched_yield|sched_get_priority_max|sched_get_priority_min|sched_rr_get_interval|restart_syscall|kill|tkill|tgkill|sigaltstack|rt_sigsuspend|rt_sigaction|rt_sigprocmask|rt_sigpending|rt_sigtimedwait|rt_sigqueueinfo|rt_sigreturn|setpriority|getpriority|reboot|setregid|setgid|setreuid|setuid|setresuid|getresuid|setresgid|getresgid|setfsuid|setfsgid|times|setpgid|getpgid|getsid|setsid|getgroups|setgroups|uname|sethostname|setdomainname|getrlimit|setrlimit|getrusage|umask|prctl|getcpu|gettimeofday|settimeofday|adjtimex|getpid|getppid|getuid|geteuid|getgid|getegid|gettid|sysinfo
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 203, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 202, 17, 16), //socket|socketpair|bind|listen
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 217, 16, 15), //connect|getsockname|getpeername|sendto|recvfrom|setsockopt|getsockopt|shutdown|sendmsg|recvmsg|readahead|brk|munmap|mremap
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 266, 7, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 240, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 226, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 224, 12, 11), //clone|execve|mmap|fadvise64
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 234, 11, 10), //mprotect|msync|mlock|munlock|mlockall|munlockall|mincore|madvise
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 260, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 244, 9, 8), //rt_tgsigqueueinfo|perf_event_open|accept4|recvmmsg
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 262, 8, 7), //wait4|prlimit64
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 281, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 274, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 272, 5, 4), //clock_adjtime|syncfs|setns|sendmmsg|process_vm_readv|process_vm_writev
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 280, 4, 3), //sched_setattr|sched_getattr|renameat2|seccomp|getrandom|memfd_create
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 284, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 282, 2, 1), //execveat
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 288, 1, 0), //mlock2|copy_file_range|preadv2|pwritev2
+BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
+};
+
+const size_t arm64_system_filter_size = sizeof(arm64_system_filter) / sizeof(struct sock_filter);