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seccomp.c
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seccomp.c
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#include <seccomp.h>
#include <stdio.h>
#include "banned.h"
#include "logger.h"
#include "seccomp.h"
static const int ALLOWED_SYSCALLS[] = {
/*
* Check user's permissions for a file.
*/
SCMP_SYS(access),
/*
* Sends a SIGALRM signal to the calling process after a number of seconds.
* Sleep could possibly be implemented using alarm in some libraries.
*/
SCMP_SYS(alarm),
/*
* Set architecture-specific thread state. Used by numpy.
*/
SCMP_SYS(arch_prctl),
/*
* Bind an address to a socket.
*/
SCMP_SYS(bind),
/*
* Used to adjust the heap. Mostly obsoleted by mmap, but could be used by
* a malloc implementation.
*/
SCMP_SYS(brk),
/*
* Get capabilities of calling thread. Unlikely to be useful
*/
SCMP_SYS(capget),
/*
* Set permissions of file.
*/
SCMP_SYS(chmod),
/*
* Change ownership of a file.
*/
SCMP_SYS(chown),
/*
* Change directories. Pretty useful, and with the chroot jail along with
* seccomp filtering, it should be unlikely to be exploitable.
*/
SCMP_SYS(chdir),
/*
* Get the resolution (precision) of the system clock.
*/
SCMP_SYS(clock_getres),
/*
* Get the current time.
*/
SCMP_SYS(clock_gettime),
/*
* Put the thread to sleep with nanosecond precision.
*/
SCMP_SYS(clock_nanosleep),
/*
* The Linux way of doing [fork](#fork), but with more options and better
* performance.
*/
SCMP_SYS(clone),
/*
* See [clone](#clone).
*/
SCMP_SYS(clone3),
/*
* Close a file descriptor.
*/
SCMP_SYS(close),
/*
* Close all file descriptors from first to last.
*/
SCMP_SYS(close_range),
/*
* Initiate a socket connection. Used by a lot of programs, including `ls
* -l`.
*/
SCMP_SYS(connect),
/*
* Copy a range of data from one file to another
*/
SCMP_SYS(copy_file_range),
/*
* Create a file with given permissions.
*/
SCMP_SYS(creat),
/*
* Duplicate a file descriptor.
*/
SCMP_SYS(dup),
/*
* See [dup](#dup).
*/
SCMP_SYS(dup2),
/*
* See [dup](#dup).
*/
SCMP_SYS(dup3),
/*
* Create an epoll instance, used for monitoring files for IO.
*/
SCMP_SYS(epoll_create),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_create1),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_ctl),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_ctl_old),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_pwait),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_wait),
/*
* See [epoll_create](#epoll_create).
*/
SCMP_SYS(epoll_wait_old),
/*
* Create a file descriptor for event notification.
*/
SCMP_SYS(eventfd),
/*
* See [eventfd](#eventfd).
*/
SCMP_SYS(eventfd2),
/*
* Execute a program.
*/
SCMP_SYS(execve),
/*
* See [execve](#execve).
*/
SCMP_SYS(execveat),
/*
* Terminate the calling process
*/
SCMP_SYS(exit),
/*
* See [exit](#exit).
*/
SCMP_SYS(exit_group),
/*
* Check the user's permissions for a file. See [access](#access).
*/
SCMP_SYS(faccessat),
/*
* See [faccessat](#faccessat).
*/
SCMP_SYS(faccessat2),
/*
* Declare an access pattern for data.
*/
SCMP_SYS(fadvise64),
/*
* Allocate space for a file.
*/
SCMP_SYS(fallocate),
/*
* Initialize an fanotify group.
*/
SCMP_SYS(fanotify_init),
/*
* See [fanotify_init](#fanotify_init)
*/
SCMP_SYS(fanotify_mark),
/*
* Change working directory. See [chdir](#chdir)
*/
SCMP_SYS(fchdir),
/*
* Toolbox for manipulating a file descriptor.
*/
SCMP_SYS(fcntl),
/*
* See [fsync](#fsync)
*/
SCMP_SYS(fdatasync),
/*
* Get extended attributes for file descriptor.
*/
SCMP_SYS(fgetxattr),
/*
* List extended attributes for file descriptor.
*/
SCMP_SYS(flistxattr),
/*
* Place or remove a lock on a file.
*/
SCMP_SYS(flock),
/*
* Create a child process. Mostly replaced by [clone](#clone).
*/
SCMP_SYS(fork),
/*
* Remove extended file attributes.
*/
SCMP_SYS(fremovexattr),
/*
* Set the value of extended file attributes.
*/
SCMP_SYS(fsetxattr),
/*
* Get file status.
*/
SCMP_SYS(fstat),
/*
* Get filesystem status.
*/
SCMP_SYS(fstatfs),
/*
* Sync data to disk (with caveats that disk vendors often lie about
* fsync).
*/
SCMP_SYS(fsync),
/*
* Shrink a file to the given size in bytes.
*/
SCMP_SYS(ftruncate),
/*
* User space lock.
*/
SCMP_SYS(futex),
/*
* Identify which CPU the thread is running on.
*/
SCMP_SYS(getcpu),
/*
* Get current working directory.
*/
SCMP_SYS(getcwd),
/*
* Get directory entries.
*/
SCMP_SYS(getdents),
/*
* See [getdents](#getdents)
*/
SCMP_SYS(getdents64),
/*
* Get effective user id
*/
SCMP_SYS(geteuid),
/*
* Get effective group id
*/
SCMP_SYS(getegid),
/*
* Get real group id
*/
SCMP_SYS(getgid),
/*
* Get groups
*/
SCMP_SYS(getgroups),
/*
* Get timer
*/
SCMP_SYS(getitimer),
/*
* Retrieve NUMA memory policy for a thread.
*/
SCMP_SYS(get_mempolicy),
/*
* Get name of connected peer socket.
*/
SCMP_SYS(getpeername),
/*
* Get process group.
*/
SCMP_SYS(getpgid),
/*
* See [getpgid](#getpgid)
*/
SCMP_SYS(getpgrp),
/*
* Get process ID.
*/
SCMP_SYS(getpid),
/*
* Get process ID of parent process.
*/
SCMP_SYS(getppid),
/*
* Get scheduling priority.
*/
SCMP_SYS(getpriority),
/*
* Fill a buffer with random bytes.
*/
SCMP_SYS(getrandom),
/*
* Get real, effective, and saved group IDs
*/
SCMP_SYS(getresuid),
/*
* Get real, effective, and saved user IDs
*/
SCMP_SYS(getresuid),
/*
* Get resource limits
*/
SCMP_SYS(getrlimit),
/*
* Get list of robust futexes.
*/
SCMP_SYS(get_robust_list),
/*
* Get resource usage.
*/
SCMP_SYS(getrusage),
/*
* Get session ID.
*/
SCMP_SYS(getsid),
/*
* Get the address that the socket file descriptor is bound to.
*/
SCMP_SYS(getsockname),
/*
* Get options on socket.
*/
SCMP_SYS(getsockopt),
/*
* Get thread local storage information.
*/
SCMP_SYS(get_thread_area),
/*
* Get thread ID.
*/
SCMP_SYS(gettid),
/*
* Get time of day.
*/
SCMP_SYS(gettimeofday),
/*
* Get User ID of process.
*/
SCMP_SYS(getuid),
/*
* Get extended attribute value.
*/
SCMP_SYS(getxattr),
/*
* Part of the inotify API to monitor files and directories.
*/
SCMP_SYS(inotify_add_watch),
/*
* See [inotify_add_watch](#inotify_add_watch)
*/
SCMP_SYS(inotify_init),
/*
* See [inotify_add_watch](#inotify_add_watch)
*/
SCMP_SYS(inotify_init1),
/*
* See [inotify_add_watch](#inotify_add_watch)
*/
SCMP_SYS(inotify_rm_watch),
/*
* Cancel an IO operation.
*/
SCMP_SYS(io_cancel),
/*
* Control an IO device.
*/
SCMP_SYS(ioctl),
/*
* Destroy an IO context.
*/
SCMP_SYS(io_destroy),
/*
* Read asynchronous I/O events from the completion queue
*/
SCMP_SYS(io_getevents),
/*
* Get IO scheduling priority.
*/
SCMP_SYS(ioprio_get),
/*
* Set the scheduling priority of the calling process.
*/
SCMP_SYS(ioprio_set),
/*
* Create an async IO context.
*/
SCMP_SYS(io_setup),
/*
* See [io_setup](#io_setup)
*/
SCMP_SYS(io_setup),
/*
* See [io_setup](#io_setup)
*/
SCMP_SYS(io_submit),
/*
* See [io_setup](#io_setup)
*/
SCMP_SYS(io_uring_enter),
/*
* See [io_setup](#io_setup)
*/
SCMP_SYS(io_uring_register),
/*
* See [io_setup](#io_setup)
*/
SCMP_SYS(io_uring_setup),
/*
* Send a signal to a process. We can't really get away from signaling
* processes, and even if the user program manages to get root, it couldn't
* leak private information by killing other processes, so there is little
* risk to allow the kill system call.
*/
SCMP_SYS(kill),
/*
* See [chown](#chown)
*/
SCMP_SYS(lchown),
/*
* See [getxattr](#getxattr)
*/
SCMP_SYS(lgetxattr),
/*
* List extended attributes
*/
SCMP_SYS(listxattr),
/*
* See [listxattr](#listxattr)
*/
SCMP_SYS(llistxattr),
/*
* Lookup path of directory entry.
*/
SCMP_SYS(lookup_dcookie),
/*
* Remove an extended attribute.
*/
SCMP_SYS(lremovexattr),
/*
* Seek to a location in a file.
*/
SCMP_SYS(lseek),
/*
* Set extended attributes.
*/
SCMP_SYS(lsetxattr),
/*
* Get file status.
*/
SCMP_SYS(lstat),
/*
* Inform the kernel of which address ranges the process will be used for
* performance improvements.
*/
SCMP_SYS(madvise),
/*
* Set NUMA policy, used by numpy
*/
SCMP_SYS(mbind),
/*
* Issue memory barriers on a set of threads
*/
SCMP_SYS(membarrier),
/*
* Create a memory backed file.
*/
SCMP_SYS(memfd_create),
/*
* Create a memory region only visible to the calling process.
* See the [Phoronix
* article](https://www.phoronix.com/news/Linux-5.14-memfd_secret) for
* details.
*/
SCMP_SYS(memfd_secret),
/*
* Determine whether pages are resident in memory.
*/
SCMP_SYS(mincore),
/*
* Create a directory.
*/
SCMP_SYS(mkdir),
/*
* See [mkdir](#mkdir)
*/
SCMP_SYS(mkdirat),
/*
* Lock pages in memory, and keep them from getting swapped out.
*/
SCMP_SYS(mlock),
/*
* See [mlock](#mlock)
*/
SCMP_SYS(mlock2),
/*
* See [mlock](#mlock)
*/
SCMP_SYS(mlockall),
/*
* Create a new mapping in virtual memory. Can map files into memory
* segments, or can be used to allocate physical memory to a virtual memory
* address space. Often malloc implementations use mmap.
*/
SCMP_SYS(mmap),
/*
* Modify the local descriptor table for the calling process.
*/
SCMP_SYS(modify_ldt),
/*
* Change the access protections for the calling process's memory at a
* given address range. Needed by many common programs.
*/
SCMP_SYS(mprotect),
/*
* See [mq_open](#mq-open)
*/
SCMP_SYS(mq_getsetattr),
/*
* See [mq_open](#mq-open)
*/
SCMP_SYS(mq_notify),
/*
* Open a message queue.
*/
SCMP_SYS(mq_open),
/*
* See [mq_open](#mq-open)
*/
SCMP_SYS(mq_timedreceive),
/*
* See [mq_open](#mq-open)
*/
SCMP_SYS(mq_timedsend),
/*
* Remove a message queue.
*/
SCMP_SYS(mq_unlink),
/*
* Expand or shrink an existing memory map. Possibly used by malloc.
*/
SCMP_SYS(mremap),
/*
* Perform control operation on message queue.
*/
SCMP_SYS(msgctl),
/*
* Get a message queue identifier.
*/
SCMP_SYS(msgget),
/*
* Receive message from a message queue.
*/
SCMP_SYS(msgrcv),
/*
* Send a message on a message queue.
*/
SCMP_SYS(msgsnd),
/*
* Synchronize a memory mapped file to disk.
*/
SCMP_SYS(msync),
/*
* See [mlock](#mlock)
*/
SCMP_SYS(munlock),
/*
* See [mlock](#mlock)
*/
SCMP_SYS(munlockall),
/*
* Unmap a region of memory.
*/
SCMP_SYS(munmap),
/*
* Get a handle for a pathname.
*/
SCMP_SYS(name_to_handle_at),
/*
* High resolution sleep.
*/
SCMP_SYS(nanosleep),
/*
* See [fstat](#fstat)
*/
SCMP_SYS(newfstatat),
/*
* Open and/or create a file.
*/
SCMP_SYS(open),
/*
* See [open](#open)
*/
SCMP_SYS(openat),
/*
* See [open](#open)
*/
SCMP_SYS(openat2),
/*
* Open a file via a handle.
*/
SCMP_SYS(open_by_handle_at),
/*
* Calling process waits for a signal.
*/
SCMP_SYS(pause),
/*
* Set which "personality" the process will use.
*/
SCMP_SYS(personality),
/*
* Get a file descriptor to refer to a process.
*/
SCMP_SYS(pidfd_open),
/*
* Send a signal to a process as a file descriptor.
*/
SCMP_SYS(pidfd_send_signal),
/*
* Create a unidirectional data channel.
*/
SCMP_SYS(pipe),
/*
* See [pipe](#pipe)
*/
SCMP_SYS(pipe2),
/*
* Allocate a protection key.
*/
SCMP_SYS(pkey_alloc),
/*
* Free a protection key.
*/
SCMP_SYS(pkey_free),
/*
* Set memory protection using pkeys(7).
*/
SCMP_SYS(pkey_mprotect),
/*
* Wait for an event on a file descriptor.
*/
SCMP_SYS(poll),
/*
* See [poll](poll)
*/
SCMP_SYS(ppoll),
/*
* Manipulate the calling thread/process.
*/
SCMP_SYS(prctl),
/*
* Read from an fd at a given offset.
*/
SCMP_SYS(pread64),
/*
* Read data into multiple buffers.
*/
SCMP_SYS(preadv),
/*
* Set resource limits.
*/
SCMP_SYS(prlimit64),
/*
* Give advice about use of memory to a process
*/
SCMP_SYS(process_madvise),
/*
* IO multiplexing.
*/
SCMP_SYS(pselect6),
/*
* Write to an fd at a given offset.
*/
SCMP_SYS(pwrite64),
/*
* Write data into multiple buffers.
*/
SCMP_SYS(pwritev),
/*
* See [pwritev](#pwritev)
*/
SCMP_SYS(pwritev2),
/*
* Read from a file descriptor.
*/
SCMP_SYS(read),
/*
* Initiate file readahead into page cache.
*/
SCMP_SYS(readahead),
/*
* Read the value of a symbolic link.
*/
SCMP_SYS(readlink),
/*
* See [readlink](#readlink)
*/
SCMP_SYS(readlinkat),
/*
* Read data into multiple buffers.
*/
SCMP_SYS(readv),
/*
* Receive a message from a socket.
*/
SCMP_SYS(recvfrom),
/*
* Receive multiple messages from a socket.
*/
SCMP_SYS(recvmmsg),
/*
* Receive a message from a socket.
*/
SCMP_SYS(recvmsg),
/*
* Deprecated, but not harmful. Create a nonlinear file mapping.
*/
SCMP_SYS(remap_file_pages),
/*
* Remove an extended attribute
*/
SCMP_SYS(removexattr),
/*
* Change the name or location of a file.
*/
SCMP_SYS(rename),
/*
* See [rename](#rename)
*/
SCMP_SYS(renameat),
/*
* See [rename](#rename)
*/
SCMP_SYS(renameat2),
/*
* Restart a system call after interruption by a stop signal.
*/
SCMP_SYS(restart_syscall),
/*
* Remove directory.
*/
SCMP_SYS(rmdir),
/*
* Restartable sequence, see:
* https://www.phoronix.com/news/Restartable-Sequences-Speed
*/
SCMP_SYS(rseq),
/*
* Change the behavior of a signal action.
*/
SCMP_SYS(rt_sigaction),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigpending),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigprocmask),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigqueueinfo),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigreturn),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigsuspend),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_sigtimedwait),
/*
* See [rt_sigaction](#rt-sigaction)
*/
SCMP_SYS(rt_tgsigqueueinfo),
/*
* Numpy looks up scheduling configuration for process.
*/
SCMP_SYS(sched_getaffinity),
SCMP_SYS(sched_getattr),
SCMP_SYS(sched_getparam),
SCMP_SYS(sched_get_priority_max),
SCMP_SYS(sched_get_priority_min),
SCMP_SYS(sched_getscheduler),
SCMP_SYS(sched_rr_get_interval),
SCMP_SYS(sched_yield),
SCMP_SYS(sched_setaffinity),
/*
* Monitor multiple file descriptors.
*/
SCMP_SYS(select),
/*