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|
/*
* Copyright (C) 2014-2019 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _GNU_SOURCE
#include "fseccomp.h"
#include <stdio.h>
#include <sys/syscall.h>
typedef struct {
const char * const name;
int nr;
} SyscallEntry;
typedef struct {
const char * const name;
const char * const list;
} SyscallGroupList;
typedef struct {
const char *slist;
char *prelist, *postlist;
bool found;
int syscall;
} SyscallCheckList;
static const SyscallEntry syslist[] = {
//
// code generated using tools/extract-syscall
//
#include "../include/syscall.h"
//
// end of generated code
//
}; // end of syslist
static const SyscallGroupList sysgroups[] = {
{ .name = "@aio", .list =
#ifdef SYS_io_cancel
"io_cancel,"
#endif
#ifdef SYS_io_destroy
"io_destroy,"
#endif
#ifdef SYS_io_getevents
"io_getevents,"
#endif
#ifdef SYS_io_pgetevents
"io_pgetevents,"
#endif
#ifdef SYS_io_setup
"io_setup,"
#endif
#ifdef SYS_io_submit
"io_submit"
#endif
},
{ .name = "@basic-io", .list =
#ifdef SYS__llseek
"_llseek,"
#endif
#ifdef SYS_close
"close,"
#endif
#ifdef SYS_dup
"dup,"
#endif
#ifdef SYS_dup2
"dup2,"
#endif
#ifdef SYS_dup3
"dup3,"
#endif
#ifdef SYS_lseek
"lseek,"
#endif
#ifdef SYS_pread64
"pread64,"
#endif
#ifdef SYS_preadv
"preadv,"
#endif
#ifdef SYS_preadv2
"preadv2,"
#endif
#ifdef SYS_pwrite64
"pwrite64,"
#endif
#ifdef SYS_pwritev
"pwritev,"
#endif
#ifdef SYS_pwritev2
"pwritev2,"
#endif
#ifdef SYS_read
"read,"
#endif
#ifdef SYS_readv
"readv,"
#endif
#ifdef SYS_write
"write,"
#endif
#ifdef SYS_writev
"writev"
#endif
},
{ .name = "@chown", .list =
#ifdef SYS_chown
"chown,"
#endif
#ifdef SYS_chown32
"chown32,"
#endif
#ifdef SYS_fchown
"fchown,"
#endif
#ifdef SYS_fchown32
"fchown32,"
#endif
#ifdef SYS_fchownat
"fchownat,"
#endif
#ifdef SYS_lchown
"lchown,"
#endif
#ifdef SYS_lchown32
"lchown32"
#endif
},
{ .name = "@clock", .list =
#ifdef SYS_adjtimex
"adjtimex,"
#endif
#ifdef SYS_clock_adjtime
"clock_adjtime,"
#endif
#ifdef SYS_clock_settime
"clock_settime,"
#endif
#ifdef SYS_settimeofday
"settimeofday,"
#endif
#ifdef SYS_stime
"stime"
#endif
},
{ .name = "@cpu-emulation", .list =
#ifdef SYS_modify_ldt
"modify_ldt,"
#endif
#ifdef SYS_subpage_prot
"subpage_prot,"
#endif
#ifdef SYS_switch_endian
"switch_endian,"
#endif
#ifdef SYS_vm86
"vm86,"
#endif
#ifdef SYS_vm86old
"vm86old"
#endif
#if !defined(SYS_modify_ldt) && !defined(SYS_subpage_prot) && !defined(SYS_switch_endian) && !defined(SYS_vm86) && !defined(SYS_vm86old)
"__dummy_syscall__" // workaround for arm64, s390x and sparc64 which don't have any of above defined and empty syscall lists are not allowed
#endif
},
{ .name = "@debug", .list =
#ifdef SYS_lookup_dcookie
"lookup_dcookie,"
#endif
#ifdef SYS_perf_event_open
"perf_event_open,"
#endif
#ifdef SYS_process_vm_writev
"process_vm_writev,"
#endif
#ifdef SYS_rtas
"rtas,"
#endif
#ifdef SYS_s390_runtime_instr
"s390_runtime_instr,"
#endif
#ifdef SYS_sys_debug_setcontext
"sys_debug_setcontext,"
#endif
},
{ .name = "@default", .list =
"@cpu-emulation,"
"@debug,"
"@obsolete,"
"@privileged,"
"@resources,"
#ifdef SYS_open_by_handle_at
"open_by_handle_at,"
#endif
#ifdef SYS_name_to_handle_at
"name_to_handle_at,"
#endif
#ifdef SYS_ioprio_set
"ioprio_set,"
#endif
#ifdef SYS_ni_syscall
"ni_syscall,"
#endif
#ifdef SYS_syslog
"syslog,"
#endif
#ifdef SYS_fanotify_init
"fanotify_init,"
#endif
#ifdef SYS_kcmp
"kcmp,"
#endif
#ifdef SYS_add_key
"add_key,"
#endif
#ifdef SYS_request_key
"request_key,"
#endif
#ifdef SYS_keyctl
"keyctl,"
#endif
#ifdef SYS_io_setup
"io_setup,"
#endif
#ifdef SYS_io_destroy
"io_destroy,"
#endif
#ifdef SYS_io_getevents
"io_getevents,"
#endif
#ifdef SYS_io_submit
"io_submit,"
#endif
#ifdef SYS_io_cancel
"io_cancel,"
#endif
#ifdef SYS_remap_file_pages
"remap_file_pages,"
#endif
#ifdef SYS_vmsplice
"vmsplice,"
#endif
#ifdef SYS_umount
"umount,"
#endif
#ifdef SYS_userfaultfd
"userfaultfd,"
#endif
//#ifdef SYS_mincore // 0.9.57 - problem fixed in Linux kernel 5.0; on 4.x it will break kodi, mpv, totem
// "mincore"
//#endif
},
{ .name = "@default-nodebuggers", .list =
"@default,"
#ifdef SYS_ptrace
"ptrace,"
#endif
#ifdef SYS_personality
"personality,"
#endif
#ifdef SYS_process_vm_readv
"process_vm_readv"
#endif
},
{ .name = "@default-keep", .list =
"execve,"
"prctl"
},
{ .name = "@file-system", .list =
#ifdef SYS_access
"access,"
#endif
#ifdef SYS_chdir
"chdir,"
#endif
#ifdef SYS_chmod
"chmod,"
#endif
#ifdef SYS_close
"close,"
#endif
#ifdef SYS_creat
"creat,"
#endif
#ifdef SYS_faccessat
"faccessat,"
#endif
#ifdef SYS_fallocate
"fallocate,"
#endif
#ifdef SYS_fchdir
"fchdir,"
#endif
#ifdef SYS_fchmod
"fchmod,"
#endif
#ifdef SYS_fchmodat
"fchmodat,"
#endif
#ifdef SYS_fcntl
"fcntl,"
#endif
#ifdef SYS_fcntl64
"fcntl64,"
#endif
#ifdef SYS_fgetxattr
"fgetxattr,"
#endif
#ifdef SYS_flistxattr
"flistxattr,"
#endif
#ifdef SYS_fremovexattr
"fremovexattr,"
#endif
#ifdef SYS_fsetxattr
"fsetxattr,"
#endif
#ifdef SYS_fstat
"fstat,"
#endif
#ifdef SYS_fstat64
"fstat64,"
#endif
#ifdef SYS_fstatat64
"fstatat64,"
#endif
#ifdef SYS_fstatfs
"fstatfs,"
#endif
#ifdef SYS_fstatfs64
"fstatfs64,"
#endif
#ifdef SYS_ftruncate
"ftruncate,"
#endif
#ifdef SYS_ftruncate64
"ftruncate64,"
#endif
#ifdef SYS_futimesat
"futimesat,"
#endif
#ifdef SYS_getcwd
"getcwd,"
#endif
#ifdef SYS_getdents
"getdents,"
#endif
#ifdef SYS_getdents64
"getdents64,"
#endif
#ifdef SYS_getxattr
"getxattr,"
#endif
#ifdef SYS_inotify_add_watch
"inotify_add_watch,"
#endif
#ifdef SYS_inotify_init
"inotify_init,"
#endif
#ifdef SYS_inotify_init1
"inotify_init1,"
#endif
#ifdef SYS_inotify_rm_watch
"inotify_rm_watch,"
#endif
#ifdef SYS_lgetxattr
"lgetxattr,"
#endif
#ifdef SYS_link
"link,"
#endif
#ifdef SYS_linkat
"linkat,"
#endif
#ifdef SYS_listxattr
"listxattr,"
#endif
#ifdef SYS_llistxattr
"llistxattr,"
#endif
#ifdef SYS_lremovexattr
"lremovexattr,"
#endif
#ifdef SYS_lsetxattr
"lsetxattr,"
#endif
#ifdef SYS_lstat
"lstat,"
#endif
#ifdef SYS_lstat64
"lstat64,"
#endif
#ifdef SYS_mkdir
"mkdir,"
#endif
#ifdef SYS_mkdirat
"mkdirat,"
#endif
#ifdef SYS_mknod
"mknod,"
#endif
#ifdef SYS_mknodat
"mknodat,"
#endif
#ifdef SYS_mmap
"mmap,"
#endif
#ifdef SYS_mmap2
"mmap2,"
#endif
#ifdef SYS_munmap
"munmap,"
#endif
#ifdef SYS_newfstatat
"newfstatat,"
#endif
#ifdef SYS_oldfstat
"oldfstat,"
#endif
#ifdef SYS_oldlstat
"oldlstat,"
#endif
#ifdef SYS_oldstat
"oldstat,"
#endif
#ifdef SYS_open
"open,"
#endif
#ifdef SYS_openat
"openat,"
#endif
#ifdef SYS_readlink
"readlink,"
#endif
#ifdef SYS_readlinkat
"readlinkat,"
#endif
#ifdef SYS_removexattr
"removexattr,"
#endif
#ifdef SYS_rename
"rename,"
#endif
#ifdef SYS_renameat
"renameat,"
#endif
#ifdef SYS_renameat2
"renameat2,"
#endif
#ifdef SYS_rmdir
"rmdir,"
#endif
#ifdef SYS_setxattr
"setxattr,"
#endif
#ifdef SYS_stat
"stat,"
#endif
#ifdef SYS_stat64
"stat64,"
#endif
#ifdef SYS_statfs
"statfs,"
#endif
#ifdef SYS_statfs64
"statfs64,"
#endif
#ifdef SYS_statx
"statx,"
#endif
#ifdef SYS_symlink
"symlink,"
#endif
#ifdef SYS_symlinkat
"symlinkat,"
#endif
#ifdef SYS_truncate
"truncate,"
#endif
#ifdef SYS_truncate64
"truncate64,"
#endif
#ifdef SYS_unlink
"unlink,"
#endif
#ifdef SYS_unlinkat
"unlinkat,"
#endif
#ifdef SYS_utime
"utime,"
#endif
#ifdef SYS_utimensat
"utimensat,"
#endif
#ifdef SYS_utimes
"utimes"
#endif
},
{ .name = "@io-event", .list =
#ifdef SYS__newselect
"_newselect,"
#endif
#ifdef SYS_epoll_create
"epoll_create,"
#endif
#ifdef SYS_epoll_create1
"epoll_create1,"
#endif
#ifdef SYS_epoll_ctl
"epoll_ctl,"
#endif
#ifdef SYS_epoll_ctl_old
"epoll_ctl_old,"
#endif
#ifdef SYS_epoll_pwait
"epoll_pwait,"
#endif
#ifdef SYS_epoll_wait
"epoll_wait,"
#endif
#ifdef SYS_epoll_wait_old
"epoll_wait_old,"
#endif
#ifdef SYS_eventfd
"eventfd,"
#endif
#ifdef SYS_eventfd2
"eventfd2,"
#endif
#ifdef SYS_poll
"poll,"
#endif
#ifdef SYS_ppoll
"ppoll,"
#endif
#ifdef SYS_pselect6
"pselect6,"
#endif
#ifdef SYS_select
"select"
#endif
},
{ .name = "@ipc", .list =
#ifdef SYS_ipc
"ipc,"
#endif
#ifdef SYS_memfd_create
"memfd_create,"
#endif
#ifdef SYS_mq_getsetattr
"mq_getsetattr,"
#endif
#ifdef SYS_mq_notify
"mq_notify,"
#endif
#ifdef SYS_mq_open
"mq_open,"
#endif
#ifdef SYS_mq_timedreceive
"mq_timedreceive,"
#endif
#ifdef SYS_mq_timedsend
"mq_timedsend,"
#endif
#ifdef SYS_mq_unlink
"mq_unlink,"
#endif
#ifdef SYS_msgctl
"msgctl,"
#endif
#ifdef SYS_msgget
"msgget,"
#endif
#ifdef SYS_msgrcv
"msgrcv,"
#endif
#ifdef SYS_msgsnd
"msgsnd,"
#endif
#ifdef SYS_pipe
"pipe,"
#endif
#ifdef SYS_pipe2
"pipe2,"
#endif
#ifdef SYS_process_vm_readv
"process_vm_readv,"
#endif
#ifdef SYS_process_vm_writev
"process_vm_writev,"
#endif
#ifdef SYS_semctl
"semctl,"
#endif
#ifdef SYS_semget
"semget,"
#endif
#ifdef SYS_semop
"semop,"
#endif
#ifdef SYS_semtimedop
"semtimedop,"
#endif
#ifdef SYS_shmat
"shmat,"
#endif
#ifdef SYS_shmctl
"shmctl,"
#endif
#ifdef SYS_shmdt
"shmdt,"
#endif
#ifdef SYS_shmget
"shmget"
#endif
},
{ .name = "@keyring", .list =
#ifdef SYS_add_key
"add_key,"
#endif
#ifdef SYS_keyctl
"keyctl,"
#endif
#ifdef SYS_request_key
"request_key"
#endif
},
{ .name = "@memlock", .list =
#ifdef SYS_mlock
"mlock,"
#endif
#ifdef SYS_mlock2
"mlock2,"
#endif
#ifdef SYS_mlockall
"mlockall,"
#endif
#ifdef SYS_munlock
"munlock,"
#endif
#ifdef SYS_munlockall
"munlockall"
#endif
},
{ .name = "@module", .list =
#ifdef SYS_delete_module
"delete_module,"
#endif
#ifdef SYS_finit_module
"finit_module,"
#endif
#ifdef SYS_init_module
"init_module"
#endif
},
{ .name = "@mount", .list =
#ifdef SYS_chroot
"chroot,"
#endif
#ifdef SYS_mount
"mount,"
#endif
#ifdef SYS_pivot_root
"pivot_root,"
#endif
#ifdef SYS_umount
"umount,"
#endif
#ifdef SYS_umount2
"umount2"
#endif
},
{ .name = "@network-io", .list =
#ifdef SYS_accept
"accept,"
#endif
#ifdef SYS_accept4
"accept4,"
#endif
#ifdef SYS_bind
"bind,"
#endif
#ifdef SYS_connect
"connect,"
#endif
#ifdef SYS_getpeername
"getpeername,"
#endif
#ifdef SYS_getsockname
"getsockname,"
#endif
#ifdef SYS_getsockopt
"getsockopt,"
#endif
#ifdef SYS_listen
"listen,"
#endif
#ifdef SYS_recv
"recv,"
#endif
#ifdef SYS_recvfrom
"recvfrom,"
#endif
#ifdef SYS_recvmmsg
"recvmmsg,"
#endif
#ifdef SYS_recvmsg
"recvmsg,"
#endif
#ifdef SYS_send
"send,"
#endif
#ifdef SYS_sendmmsg
"sendmmsg,"
#endif
#ifdef SYS_sendmsg
"sendmsg,"
#endif
#ifdef SYS_sendto
"sendto,"
#endif
#ifdef SYS_setsockopt
"setsockopt,"
#endif
#ifdef SYS_shutdown
"shutdown,"
#endif
#ifdef SYS_socket
"socket,"
#endif
#ifdef SYS_socketcall
"socketcall,"
#endif
#ifdef SYS_socketpair
"socketpair"
#endif
},
{ .name = "@obsolete", .list =
#ifdef SYS__sysctl
"_sysctl,"
#endif
#ifdef SYS_afs_syscall
"afs_syscall,"
#endif
#ifdef SYS_bdflush
"bdflush,"
#endif
#ifdef SYS_break
"break,"
#endif
#ifdef SYS_create_module
"create_module,"
#endif
#ifdef SYS_ftime
"ftime,"
#endif
#ifdef SYS_get_kernel_syms
"get_kernel_syms,"
#endif
#ifdef SYS_getpmsg
"getpmsg,"
#endif
#ifdef SYS_gtty
"gtty,"
#endif
#ifdef SYS_idle
"idle,"
#endif
#ifdef SYS_lock
"lock,"
#endif
#ifdef SYS_mpx
"mpx,"
#endif
#ifdef SYS_prof
"prof,"
#endif
#ifdef SYS_profil
"profil,"
#endif
#ifdef SYS_putpmsg
"putpmsg,"
#endif
#ifdef SYS_query_module
"query_module,"
#endif
#ifdef SYS_security
"security,"
#endif
#ifdef SYS_sgetmask
"sgetmask,"
#endif
#ifdef SYS_ssetmask
"ssetmask,"
#endif
#ifdef SYS_stty
"stty,"
#endif
#ifdef SYS_sysfs
"sysfs,"
#endif
#ifdef SYS_tuxcall
"tuxcall,"
#endif
#ifdef SYS_ulimit
"ulimit,"
#endif
#ifdef SYS_uselib
"uselib,"
#endif
#ifdef SYS_ustat
"ustat,"
#endif
#ifdef SYS_vserver
"vserver"
#endif
#if !defined(SYS__sysctl) && !defined(SYS_afs_syscall) && !defined(SYS_bdflush) && !defined(SYS_break) && !defined(SYS_create_module) && !defined(SYS_ftime) && !defined(SYS_get_kernel_syms) && !defined(SYS_getpmsg) && !defined(SYS_gtty) && !defined(SYS_lock) && !defined(SYS_mpx) && !defined(SYS_prof) && !defined(SYS_profil) && !defined(SYS_putpmsg) && !defined(SYS_query_module) && !defined(SYS_security) && !defined(SYS_sgetmask) && !defined(SYS_ssetmask) && !defined(SYS_stty) && !defined(SYS_sysfs) && !defined(SYS_tuxcall) && !defined(SYS_ulimit) && !defined(SYS_uselib) && !defined(SYS_ustat) && !defined(SYS_vserver)
"__dummy_syscall__" // workaround for arm64 which doesn't have any of above defined and empty syscall lists are not allowed
#endif
},
{ .name = "@privileged", .list =
"@chown,"
"@clock,"
"@module,"
"@raw-io,"
"@reboot,"
"@swap,"
#ifdef SYS__sysctl
"_sysctl,"
#endif
#ifdef SYS_acct
"acct,"
#endif
#ifdef SYS_bpf
"bpf,"
#endif
#ifdef SYS_capset
"capset,"
#endif
#ifdef SYS_chroot
"chroot,"
#endif
#ifdef SYS_fanotify_init
"fanotify_init,"
#endif
#ifdef SYS_mount
"mount,"
#endif
#ifdef SYS_nfsservctl
"nfsservctl,"
#endif
#ifdef SYS_open_by_handle_at
"open_by_handle_at,"
#endif
#ifdef SYS_pivot_root
"pivot_root,"
#endif
#ifdef SYS_quotactl
"quotactl,"
#endif
#ifdef SYS_setdomainname
"setdomainname,"
#endif
#ifdef SYS_setfsuid
"setfsuid,"
#endif
#ifdef SYS_setfsuid32
"setfsuid32,"
#endif
#ifdef SYS_setgroups
"setgroups,"
#endif
#ifdef SYS_setgroups32
"setgroups32,"
#endif
#ifdef SYS_sethostname
"sethostname,"
#endif
#ifdef SYS_setresuid
"setresuid,"
#endif
#ifdef SYS_setresuid32
"setresuid32,"
#endif
#ifdef SYS_setreuid
"setreuid,"
#endif
#ifdef SYS_setreuid32
"setreuid32,"
#endif
#ifdef SYS_setuid
"setuid,"
#endif
#ifdef SYS_setuid32
"setuid32,"
#endif
#ifdef SYS_umount2
"umount2,"
#endif
#ifdef SYS_vhangup
"vhangup"
#endif
},
{ .name = "@process", .list =
#ifdef SYS_arch_prctl
"arch_prctl,"
#endif
#ifdef SYS_capget
"capget,"
#endif
#ifdef SYS_clone
"clone,"
#endif
#ifdef SYS_execveat
"execveat,"
#endif
#ifdef SYS_fork
"fork,"
#endif
#ifdef SYS_getrusage
"getrusage,"
#endif
#ifdef SYS_kill
"kill,"
#endif
#ifdef SYS_pidfd_send_signal
"pidfd_send_signal,"
#endif
#ifdef SYS_prctl
"prctl,"
#endif
#ifdef SYS_rt_sigqueueinfo
"rt_sigqueueinfo,"
#endif
#ifdef SYS_rt_tgsigqueueinfo
"rt_tgsigqueueinfo,"
#endif
#ifdef SYS_setns
"setns,"
#endif
#ifdef SYS_swapcontext
"swapcontext,"
#endif
#ifdef SYS_tgkill
"tgkill,"
#endif
#ifdef SYS_times
"times,"
#endif
#ifdef SYS_tkill
"tkill,"
#endif
#ifdef SYS_unshare
"unshare,"
#endif
#ifdef SYS_vfork
"vfork,"
#endif
#ifdef SYS_wait4
"wait4,"
#endif
#ifdef SYS_waitid
"waitid,"
#endif
#ifdef SYS_waitpid
"waitpid"
#endif
},
{ .name = "@raw-io", .list =
#ifdef SYS_ioperm
"ioperm,"
#endif
#ifdef SYS_iopl
"iopl,"
#endif
#ifdef SYS_pciconfig_iobase
"pciconfig_iobase,"
#endif
#ifdef SYS_pciconfig_read
"pciconfig_read,"
#endif
#ifdef SYS_pciconfig_write
"pciconfig_write,"
#endif
#ifdef SYS_s390_mmio_read
"s390_mmio_read,"
#endif
#ifdef SYS_s390_mmio_write
"s390_mmio_write"
#endif
#if !defined(SYS_ioperm) && !defined(SYS_iopl) && !defined(SYS_pciconfig_iobase) && !defined(SYS_pciconfig_read) && !defined(SYS_pciconfig_write) && !defined(SYS_s390_mmio_read) && !defined(SYS_s390_mmio_write)
"__dummy_syscall__" // workaround for s390x which doesn't have any of above defined and empty syscall lists are not allowed
#endif
},
{ .name = "@reboot", .list =
#ifdef SYS_kexec_load
"kexec_load,"
#endif
#ifdef SYS_kexec_file_load
"kexec_file_load,"
#endif
#ifdef SYS_reboot
"reboot,"
#endif
},
{ .name = "@resources", .list =
#ifdef SYS_ioprio_set
"ioprio_set,"
#endif
#ifdef SYS_mbind
"mbind,"
#endif
#ifdef SYS_migrate_pages
"migrate_pages,"
#endif
#ifdef SYS_move_pages
"move_pages,"
#endif
#ifdef SYS_nice
"nice,"
#endif
#ifdef SYS_sched_setaffinity
"sched_setaffinity,"
#endif
#ifdef SYS_sched_setattr
"sched_setattr,"
#endif
#ifdef SYS_sched_setparam
"sched_setparam,"
#endif
#ifdef SYS_sched_setscheduler
"sched_setscheduler,"
#endif
#ifdef SYS_set_mempolicy
"set_mempolicy"
#endif
},
{ .name = "@setuid", .list =
#ifdef SYS_setgid
"setgid,"
#endif
#ifdef SYS_setgid32
"setgid32,"
#endif
#ifdef SYS_setgroups
"setgroups,"
#endif
#ifdef SYS_setgroups32
"setgroups32,"
#endif
#ifdef SYS_setregid
"setregid,"
#endif
#ifdef SYS_setregid32
"setregid32,"
#endif
#ifdef SYS_setresgid
"setresgid,"
#endif
#ifdef SYS_setresgid32
"setresgid32,"
#endif
#ifdef SYS_setresuid
"setresuid,"
#endif
#ifdef SYS_setresuid32
"setresuid32,"
#endif
#ifdef SYS_setreuid
"setreuid,"
#endif
#ifdef SYS_setreuid32
"setreuid32,"
#endif
#ifdef SYS_setuid
"setuid,"
#endif
#ifdef SYS_setuid32
"setuid32"
#endif
},
{ .name = "@signal", .list =
#ifdef SYS_rt_sigaction
"rt_sigaction,"
#endif
#ifdef SYS_rt_sigpending
"rt_sigpending,"
#endif
#ifdef SYS_rt_sigprocmask
"rt_sigprocmask,"
#endif
#ifdef SYS_rt_sigsuspend
"rt_sigsuspend,"
#endif
#ifdef SYS_rt_sigtimedwait
"rt_sigtimedwait,"
#endif
#ifdef SYS_sigaction
"sigaction,"
#endif
#ifdef SYS_sigaltstack
"sigaltstack,"
#endif
#ifdef SYS_signal
"signal,"
#endif
#ifdef SYS_signalfd
"signalfd,"
#endif
#ifdef SYS_signalfd4
"signalfd4,"
#endif
#ifdef SYS_sigpending
"sigpending,"
#endif
#ifdef SYS_sigprocmask
"sigprocmask,"
#endif
#ifdef SYS_sigsuspend
"sigsuspend"
#endif
},
{ .name = "@swap", .list =
#ifdef SYS_swapon
"swapon,"
#endif
#ifdef SYS_swapoff
"swapoff"
#endif
},
{ .name = "@sync", .list =
#ifdef SYS_fdatasync
"fdatasync,"
#endif
#ifdef SYS_fsync
"fsync,"
#endif
#ifdef SYS_msync
"msync,"
#endif
#ifdef SYS_sync
"sync,"
#endif
#ifdef SYS_sync_file_range
"sync_file_range,"
#endif
#ifdef SYS_sync_file_range2
"sync_file_range2,"
#endif
#ifdef SYS_syncfs
"syncfs"
#endif
},
{ .name = "@system-service", .list =
"@aio,"
"@basic-io,"
"@chown,"
"@default,"
"@file-system,"
"@io-event,"
"@ipc,"
"@keyring,"
"@memlock,"
"@network-io,"
"@process,"
"@resources,"
"@setuid,"
"@signal,"
"@sync,"
"@timer,"
#ifdef SYS_brk
"brk,"
#endif
#ifdef SYS_capget
"capget,"
#endif
#ifdef SYS_capset
"capset,"
#endif
#ifdef SYS_copy_file_range
"copy_file_range,"
#endif
#ifdef SYS_fadvise64
"fadvise64,"
#endif
#ifdef SYS_fadvise64_64
"fadvise64_64,"
#endif
#ifdef SYS_flock
"flock,"
#endif
#ifdef SYS_get_mempolicy
"get_mempolicy,"
#endif
#ifdef SYS_getcpu
"getcpu,"
#endif
#ifdef SYS_getpriority
"getpriority,"
#endif
#ifdef SYS_getrandom
"getrandom,"
#endif
#ifdef SYS_ioctl
"ioctl,"
#endif
#ifdef SYS_ioprio_get
"ioprio_get,"
#endif
#ifdef SYS_kcmp
"kcmp,"
#endif
#ifdef SYS_madvise
"madvise,"
#endif
#ifdef SYS_mprotect
"mprotect,"
#endif
#ifdef SYS_mremap
"mremap,"
#endif
#ifdef SYS_name_to_handle_at
"name_to_handle_at,"
#endif
#ifdef SYS_oldolduname
"oldolduname,"
#endif
#ifdef SYS_olduname
"olduname,"
#endif
#ifdef SYS_personality
"personality,"
#endif
#ifdef SYS_readahead
"readahead,"
#endif
#ifdef SYS_readdir
"readdir,"
#endif
#ifdef SYS_remap_file_pages
"remap_file_pages,"
#endif
#ifdef SYS_sched_get_priority_max
"sched_get_priority_max,"
#endif
#ifdef SYS_sched_get_priority_min
"sched_get_priority_min,"
#endif
#ifdef SYS_sched_getaffinity
"sched_getaffinity,"
#endif
#ifdef SYS_sched_getattr
"sched_getattr,"
#endif
#ifdef SYS_sched_getparam
"sched_getparam,"
#endif
#ifdef SYS_sched_getscheduler
"sched_getscheduler,"
#endif
#ifdef SYS_sched_rr_get_interval
"sched_rr_get_interval,"
#endif
#ifdef SYS_sched_yield
"sched_yield,"
#endif
#ifdef SYS_sendfile
"sendfile,"
#endif
#ifdef SYS_sendfile64
"sendfile64,"
#endif
#ifdef SYS_setfsgid
"setfsgid,"
#endif
#ifdef SYS_setfsgid32
"setfsgid32,"
#endif
#ifdef SYS_setfsuid
"setfsuid,"
#endif
#ifdef SYS_setfsuid32
"setfsuid32,"
#endif
#ifdef SYS_setpgid
"setpgid,"
#endif
#ifdef SYS_setsid
"setsid,"
#endif
#ifdef SYS_splice
"splice,"
#endif
#ifdef SYS_sysinfo
"sysinfo,"
#endif
#ifdef SYS_tee
"tee,"
#endif
#ifdef SYS_umask
"umask,"
#endif
#ifdef SYS_uname
"uname,"
#endif
#ifdef SYS_userfaultfd
"userfaultfd,"
#endif
#ifdef SYS_vmsplice
"vmsplice"
#endif
},
{ .name = "@timer", .list =
#ifdef SYS_alarm
"alarm,"
#endif
#ifdef SYS_getitimer
"getitimer,"
#endif
#ifdef SYS_setitimer
"setitimer,"
#endif
#ifdef SYS_timer_create
"timer_create,"
#endif
#ifdef SYS_timer_delete
"timer_delete,"
#endif
#ifdef SYS_timer_getoverrun
"timer_getoverrun,"
#endif
#ifdef SYS_timer_gettime
"timer_gettime,"
#endif
#ifdef SYS_timer_settime
"timer_settime,"
#endif
#ifdef SYS_timerfd_create
"timerfd_create,"
#endif
#ifdef SYS_timerfd_gettime
"timerfd_gettime,"
#endif
#ifdef SYS_timerfd_settime
"timerfd_settime,"
#endif
#ifdef SYS_times
"times"
#endif
}
};
// return -1 if error, or syscall number
static int syscall_find_name(const char *name) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
if (strcmp(name, syslist[i].name) == 0)
return syslist[i].nr;
}
return -1;
}
const char *syscall_find_nr(int nr) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
if (nr == syslist[i].nr)
return syslist[i].name;
}
return "unknown";
}
void syscall_print(void) {
int i;
int elems = sizeof(syslist) / sizeof(syslist[0]);
for (i = 0; i < elems; i++) {
printf("%d\t- %s\n", syslist[i].nr, syslist[i].name);
}
printf("\n");
}
static const char *syscall_find_group(const char *name) {
int i;
int elems = sizeof(sysgroups) / sizeof(sysgroups[0]);
for (i = 0; i < elems; i++) {
if (strcmp(name, sysgroups[i].name) == 0)
return sysgroups[i].list;
}
return NULL;
}
// allowed input:
// - syscall
// - syscall(error)
static void syscall_process_name(const char *name, int *syscall_nr, int *error_nr) {
assert(name);
if (strlen(name) == 0)
goto error;
*error_nr = -1;
// syntax check
char *str = strdup(name);
if (!str)
errExit("strdup");
char *syscall_name = str;
char *error_name = strchr(str, ':');
if (error_name) {
*error_name = '\0';
error_name++;
}
if (strlen(syscall_name) == 0) {
free(str);
goto error;
}
if (*syscall_name == '$')
*syscall_nr = strtol(syscall_name + 1, NULL, 0);
else
*syscall_nr = syscall_find_name(syscall_name);
if (error_name) {
*error_nr = errno_find_name(error_name);
if (*error_nr == -1)
*syscall_nr = -1;
}
free(str);
return;
error:
fprintf(stderr, "Error fseccomp: invalid syscall list entry %s\n", name);
exit(1);
}
// return 1 if error, 0 if OK
int syscall_check_list(const char *slist, void (*callback)(int fd, int syscall, int arg, void *ptrarg), int fd, int arg, void *ptrarg) {
// don't allow empty lists
if (slist == NULL || *slist == '\0') {
fprintf(stderr, "Error fseccomp: empty syscall lists are not allowed\n");
exit(1);
}
// work on a copy of the string
char *str = strdup(slist);
if (!str)
errExit("strdup");
char *saveptr;
char *ptr = strtok_r(str, ",", &saveptr);
if (ptr == NULL) {
fprintf(stderr, "Error fseccomp: empty syscall lists are not allowed\n");
exit(1);
}
while (ptr) {
int syscall_nr;
int error_nr;
if (*ptr == '@') {
const char *new_list = syscall_find_group(ptr);
if (!new_list) {
fprintf(stderr, "Error fseccomp: unknown syscall group %s\n", ptr);
exit(1);
}
syscall_check_list(new_list, callback, fd, arg, ptrarg);
}
else {
syscall_process_name(ptr, &syscall_nr, &error_nr);
if (syscall_nr == -1) {;}
else if (callback != NULL) {
if (error_nr != -1 && fd != 0) {
filter_add_errno(fd, syscall_nr, error_nr, ptrarg);
}
else if (error_nr != -1 && fd == 0) {
callback(fd, syscall_nr, error_nr, ptrarg);
}
else {
callback(fd, syscall_nr, arg, ptrarg);
}
}
}
ptr = strtok_r(NULL, ",", &saveptr);
}
free(str);
return 0;
}
static void find_syscall(int fd, int syscall, int arg, void *ptrarg) {
(void)fd;
(void) arg;
SyscallCheckList *ptr = ptrarg;
if (syscall == ptr->syscall)
ptr->found = true;
}
// go through list2 and find matches for problem syscall
static void syscall_in_list(int fd, int syscall, int arg, void *ptrarg) {
(void) fd;
(void)arg;
SyscallCheckList *ptr = ptrarg;
SyscallCheckList sl;
sl.found = false;
sl.syscall = syscall;
syscall_check_list(ptr->slist, find_syscall, fd, 0, &sl);
// if found in the problem list, add to post-exec list
if (sl.found) {
if (ptr->postlist) {
if (asprintf(&ptr->postlist, "%s,%s", ptr->postlist, syscall_find_nr(syscall)) == -1)
errExit("asprintf");
}
else
ptr->postlist = strdup(syscall_find_nr(syscall));
}
else { // no problem, add to pre-exec list
// build syscall:error_no
char *newcall = NULL;
if (arg != 0) {
if (asprintf(&newcall, "%s:%s", syscall_find_nr(syscall), errno_find_nr(arg)) == -1)
errExit("asprintf");
}
else {
newcall = strdup(syscall_find_nr(syscall));
if (!newcall)
errExit("strdup");
}
if (ptr->prelist) {
if (asprintf(&ptr->prelist, "%s,%s", ptr->prelist, newcall) == -1)
errExit("asprintf");
free(newcall);
}
else
ptr->prelist = newcall;
}
}
// go through list and find matches for syscalls in list @default-keep
void syscalls_in_list(const char *list, const char *slist, int fd, char **prelist, char **postlist) {
(void) fd;
SyscallCheckList sl;
// these syscalls are used by firejail after the seccomp filter is initialized
sl.slist = slist;
sl.prelist = NULL;
sl.postlist = NULL;
syscall_check_list(list, syscall_in_list, 0, 0, &sl);
if (!arg_quiet) {
printf("Seccomp list in: %s,", list);
if (sl.slist)
printf(" check list: %s,", sl.slist);
if (sl.prelist)
printf(" prelist: %s,", sl.prelist);
if (sl.postlist)
printf(" postlist: %s", sl.postlist);
printf("\n");
}
*prelist = sl.prelist;
*postlist = sl.postlist;
}
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