executor: add seccomp support for Android

This adds support for the seccomp filters that are part of Android into
the sandbox.  A process running as untrusted_app in Android has a
restricted set of syscalls that it is allow to run.  This is
accomplished by setting seccomp filters in the zygote process prior to
forking into the application process.  The seccomp filter list comes
directly from the Android source, it cannot be dynamically loaded from
an Android phone because libseccomp_policy.so does not exist as a
library on the system partition.

1 files changed, 64 insertions, 0 deletions

diff --git a/executor/android/arm64_app_policy.h b/executor/android/arm64_app_policy.h
new file mode 100644
index 000000000..589e96e20
--- /dev/null
+++ b/executor/android/arm64_app_policy.h
@@ -0,0 +1,64 @@
+// Copyright 2016 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+// File autogenerated by genseccomp.py from Android Q - edit at your peril!!
+
+const struct sock_filter arm64_app_filter[] = {
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 0, 0, 54),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 160, 27, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 101, 13, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 52, 7, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 41, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 19, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 18, 48, 47), //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, 39, 47, 46), //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
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 43, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 42, 45, 44), //pivot_root
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 51, 44, 43), //statfs|fstatfs|truncate|ftruncate|fallocate|faccessat|chdir|fchdir
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 90, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 59, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 58, 41, 40), //fchmod|fchmodat|fchownat|fchown|openat|close
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 89, 40, 39), //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
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 100, 39, 38), //capget|capset|personality|exit|exit_group|waitid|set_tid_address|unshare|futex|set_robust_list
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 147, 7, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 113, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 107, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 104, 35, 34), //nanosleep|getitimer|setitimer
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 112, 34, 33), //timer_create|timer_gettime|timer_getoverrun|timer_settime|timer_delete
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 117, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 116, 32, 31), //clock_gettime|clock_getres|clock_nanosleep
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 142, 31, 30), //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
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 153, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 150, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 149, 28, 27), //setresuid|getresuid
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 151, 27, 26), //getresgid
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 159, 26, 25), //times|setpgid|getpgid|getsid|setsid|getgroups
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 240, 13, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 203, 7, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 172, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 163, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 161, 21, 20), //uname
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 170, 20, 19), //getrlimit|setrlimit|getrusage|umask|prctl|getcpu|gettimeofday
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 198, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 180, 18, 17), //getpid|getppid|getuid|geteuid|getgid|getegid|gettid|sysinfo
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 202, 17, 16), //socket|socketpair|bind|listen
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 226, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 220, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 217, 14, 13), //connect|getsockname|getpeername|sendto|recvfrom|setsockopt|getsockopt|shutdown|sendmsg|recvmsg|readahead|brk|munmap|mremap
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 224, 13, 12), //clone|execve|mmap|fadvise64
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 234, 12, 11), //mprotect|msync|mlock|munlock|mlockall|munlockall|mincore|madvise
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 274, 5, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 267, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 260, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 244, 8, 7), //rt_tgsigqueueinfo|perf_event_open|accept4|recvmmsg
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 262, 7, 6), //wait4|prlimit64
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 272, 6, 5), //syncfs|setns|sendmmsg|process_vm_readv|process_vm_writev
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 283, 3, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 281, 1, 0),
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 280, 3, 2), //sched_setattr|sched_getattr|renameat2|seccomp|getrandom|memfd_create
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 282, 2, 1), //execveat
+BPF_JUMP(BPF_JMP|BPF_JGE|BPF_K, 288, 1, 0), //membarrier|mlock2|copy_file_range|preadv2|pwritev2
+BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
+};
+
+#define arm64_app_filter_size (sizeof(arm64_app_filter) / sizeof(struct sock_filter))