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-rw-r--r--src/shared/seccomp-util.c578
1 files changed, 0 insertions, 578 deletions
diff --git a/src/shared/seccomp-util.c b/src/shared/seccomp-util.c
deleted file mode 100644
index c9b24f1065..0000000000
--- a/src/shared/seccomp-util.c
+++ /dev/null
@@ -1,578 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <seccomp.h>
-#include <stddef.h>
-#include <sys/prctl.h>
-#include <linux/seccomp.h>
-
-#include "macro.h"
-#include "seccomp-util.h"
-#include "string-util.h"
-#include "util.h"
-
-const char* seccomp_arch_to_string(uint32_t c) {
- /* Maintain order used in <seccomp.h>.
- *
- * Names used here should be the same as those used for ConditionArchitecture=,
- * except for "subarchitectures" like x32. */
-
- switch(c) {
- case SCMP_ARCH_NATIVE:
- return "native";
- case SCMP_ARCH_X86:
- return "x86";
- case SCMP_ARCH_X86_64:
- return "x86-64";
- case SCMP_ARCH_X32:
- return "x32";
- case SCMP_ARCH_ARM:
- return "arm";
- case SCMP_ARCH_AARCH64:
- return "arm64";
- case SCMP_ARCH_MIPS:
- return "mips";
- case SCMP_ARCH_MIPS64:
- return "mips64";
- case SCMP_ARCH_MIPS64N32:
- return "mips64-n32";
- case SCMP_ARCH_MIPSEL:
- return "mips-le";
- case SCMP_ARCH_MIPSEL64:
- return "mips64-le";
- case SCMP_ARCH_MIPSEL64N32:
- return "mips64-le-n32";
- case SCMP_ARCH_PPC:
- return "ppc";
- case SCMP_ARCH_PPC64:
- return "ppc64";
- case SCMP_ARCH_PPC64LE:
- return "ppc64-le";
- case SCMP_ARCH_S390:
- return "s390";
- case SCMP_ARCH_S390X:
- return "s390x";
- default:
- return NULL;
- }
-}
-
-int seccomp_arch_from_string(const char *n, uint32_t *ret) {
- if (!n)
- return -EINVAL;
-
- assert(ret);
-
- if (streq(n, "native"))
- *ret = SCMP_ARCH_NATIVE;
- else if (streq(n, "x86"))
- *ret = SCMP_ARCH_X86;
- else if (streq(n, "x86-64"))
- *ret = SCMP_ARCH_X86_64;
- else if (streq(n, "x32"))
- *ret = SCMP_ARCH_X32;
- else if (streq(n, "arm"))
- *ret = SCMP_ARCH_ARM;
- else if (streq(n, "arm64"))
- *ret = SCMP_ARCH_AARCH64;
- else if (streq(n, "mips"))
- *ret = SCMP_ARCH_MIPS;
- else if (streq(n, "mips64"))
- *ret = SCMP_ARCH_MIPS64;
- else if (streq(n, "mips64-n32"))
- *ret = SCMP_ARCH_MIPS64N32;
- else if (streq(n, "mips-le"))
- *ret = SCMP_ARCH_MIPSEL;
- else if (streq(n, "mips64-le"))
- *ret = SCMP_ARCH_MIPSEL64;
- else if (streq(n, "mips64-le-n32"))
- *ret = SCMP_ARCH_MIPSEL64N32;
- else if (streq(n, "ppc"))
- *ret = SCMP_ARCH_PPC;
- else if (streq(n, "ppc64"))
- *ret = SCMP_ARCH_PPC64;
- else if (streq(n, "ppc64-le"))
- *ret = SCMP_ARCH_PPC64LE;
- else if (streq(n, "s390"))
- *ret = SCMP_ARCH_S390;
- else if (streq(n, "s390x"))
- *ret = SCMP_ARCH_S390X;
- else
- return -EINVAL;
-
- return 0;
-}
-
-int seccomp_init_conservative(scmp_filter_ctx *ret, uint32_t default_action) {
- scmp_filter_ctx seccomp;
- int r;
-
- /* Much like seccomp_init(), but tries to be a bit more conservative in its defaults: all secondary archs are
- * added by default, and NNP is turned off. */
-
- seccomp = seccomp_init(default_action);
- if (!seccomp)
- return -ENOMEM;
-
- r = seccomp_add_secondary_archs(seccomp);
- if (r < 0)
- goto finish;
-
- r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
- if (r < 0)
- goto finish;
-
- *ret = seccomp;
- return 0;
-
-finish:
- seccomp_release(seccomp);
- return r;
-}
-
-int seccomp_add_secondary_archs(scmp_filter_ctx ctx) {
-
- /* Add in all possible secondary archs we are aware of that
- * this kernel might support. */
-
- static const int seccomp_arches[] = {
-#if defined(__i386__) || defined(__x86_64__)
- SCMP_ARCH_X86,
- SCMP_ARCH_X86_64,
- SCMP_ARCH_X32,
-
-#elif defined(__arm__) || defined(__aarch64__)
- SCMP_ARCH_ARM,
- SCMP_ARCH_AARCH64,
-
-#elif defined(__arm__) || defined(__aarch64__)
- SCMP_ARCH_ARM,
- SCMP_ARCH_AARCH64,
-
-#elif defined(__mips__) || defined(__mips64__)
- SCMP_ARCH_MIPS,
- SCMP_ARCH_MIPS64,
- SCMP_ARCH_MIPS64N32,
- SCMP_ARCH_MIPSEL,
- SCMP_ARCH_MIPSEL64,
- SCMP_ARCH_MIPSEL64N32,
-
-#elif defined(__powerpc__) || defined(__powerpc64__)
- SCMP_ARCH_PPC,
- SCMP_ARCH_PPC64,
- SCMP_ARCH_PPC64LE,
-
-#elif defined(__s390__) || defined(__s390x__)
- SCMP_ARCH_S390,
- SCMP_ARCH_S390X,
-#endif
- };
-
- unsigned i;
- int r;
-
- for (i = 0; i < ELEMENTSOF(seccomp_arches); i++) {
- r = seccomp_arch_add(ctx, seccomp_arches[i]);
- if (r < 0 && r != -EEXIST)
- return r;
- }
-
- return 0;
-}
-
-static bool is_basic_seccomp_available(void) {
- int r;
- r = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
- return r >= 0;
-}
-
-static bool is_seccomp_filter_available(void) {
- int r;
- r = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
- return r < 0 && errno == EFAULT;
-}
-
-bool is_seccomp_available(void) {
- static int cached_enabled = -1;
- if (cached_enabled < 0)
- cached_enabled = is_basic_seccomp_available() && is_seccomp_filter_available();
- return cached_enabled;
-}
-
-const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
- [SYSCALL_FILTER_SET_BASIC_IO] = {
- /* Basic IO */
- .name = "@basic-io",
- .value =
- "close\0"
- "dup2\0"
- "dup3\0"
- "dup\0"
- "lseek\0"
- "pread64\0"
- "preadv\0"
- "pwrite64\0"
- "pwritev\0"
- "read\0"
- "readv\0"
- "write\0"
- "writev\0"
- },
- [SYSCALL_FILTER_SET_CLOCK] = {
- /* Clock */
- .name = "@clock",
- .value =
- "adjtimex\0"
- "clock_adjtime\0"
- "clock_settime\0"
- "settimeofday\0"
- "stime\0"
- },
- [SYSCALL_FILTER_SET_CPU_EMULATION] = {
- /* CPU emulation calls */
- .name = "@cpu-emulation",
- .value =
- "modify_ldt\0"
- "subpage_prot\0"
- "switch_endian\0"
- "vm86\0"
- "vm86old\0"
- },
- [SYSCALL_FILTER_SET_DEBUG] = {
- /* Debugging/Performance Monitoring/Tracing */
- .name = "@debug",
- .value =
- "lookup_dcookie\0"
- "perf_event_open\0"
- "process_vm_readv\0"
- "process_vm_writev\0"
- "ptrace\0"
- "rtas\0"
-#ifdef __NR_s390_runtime_instr
- "s390_runtime_instr\0"
-#endif
- "sys_debug_setcontext\0"
- },
- [SYSCALL_FILTER_SET_DEFAULT] = {
- /* Default list: the most basic of operations */
- .name = "@default",
- .value =
- "clock_getres\0"
- "clock_gettime\0"
- "clock_nanosleep\0"
- "execve\0"
- "exit\0"
- "exit_group\0"
- "getrlimit\0" /* make sure processes can query stack size and such */
- "gettimeofday\0"
- "nanosleep\0"
- "pause\0"
- "rt_sigreturn\0"
- "sigreturn\0"
- "time\0"
- },
- [SYSCALL_FILTER_SET_IO_EVENT] = {
- /* Event loop use */
- .name = "@io-event",
- .value =
- "_newselect\0"
- "epoll_create1\0"
- "epoll_create\0"
- "epoll_ctl\0"
- "epoll_ctl_old\0"
- "epoll_pwait\0"
- "epoll_wait\0"
- "epoll_wait_old\0"
- "eventfd2\0"
- "eventfd\0"
- "poll\0"
- "ppoll\0"
- "pselect6\0"
- "select\0"
- },
- [SYSCALL_FILTER_SET_IPC] = {
- /* Message queues, SYSV IPC or other IPC */
- .name = "@ipc",
- .value = "ipc\0"
- "memfd_create\0"
- "mq_getsetattr\0"
- "mq_notify\0"
- "mq_open\0"
- "mq_timedreceive\0"
- "mq_timedsend\0"
- "mq_unlink\0"
- "msgctl\0"
- "msgget\0"
- "msgrcv\0"
- "msgsnd\0"
- "pipe2\0"
- "pipe\0"
- "process_vm_readv\0"
- "process_vm_writev\0"
- "semctl\0"
- "semget\0"
- "semop\0"
- "semtimedop\0"
- "shmat\0"
- "shmctl\0"
- "shmdt\0"
- "shmget\0"
- },
- [SYSCALL_FILTER_SET_KEYRING] = {
- /* Keyring */
- .name = "@keyring",
- .value =
- "add_key\0"
- "keyctl\0"
- "request_key\0"
- },
- [SYSCALL_FILTER_SET_MODULE] = {
- /* Kernel module control */
- .name = "@module",
- .value =
- "delete_module\0"
- "finit_module\0"
- "init_module\0"
- },
- [SYSCALL_FILTER_SET_MOUNT] = {
- /* Mounting */
- .name = "@mount",
- .value =
- "chroot\0"
- "mount\0"
- "pivot_root\0"
- "umount2\0"
- "umount\0"
- },
- [SYSCALL_FILTER_SET_NETWORK_IO] = {
- /* Network or Unix socket IO, should not be needed if not network facing */
- .name = "@network-io",
- .value =
- "accept4\0"
- "accept\0"
- "bind\0"
- "connect\0"
- "getpeername\0"
- "getsockname\0"
- "getsockopt\0"
- "listen\0"
- "recv\0"
- "recvfrom\0"
- "recvmmsg\0"
- "recvmsg\0"
- "send\0"
- "sendmmsg\0"
- "sendmsg\0"
- "sendto\0"
- "setsockopt\0"
- "shutdown\0"
- "socket\0"
- "socketcall\0"
- "socketpair\0"
- },
- [SYSCALL_FILTER_SET_OBSOLETE] = {
- /* Unusual, obsolete or unimplemented, some unknown even to libseccomp */
- .name = "@obsolete",
- .value =
- "_sysctl\0"
- "afs_syscall\0"
- "break\0"
- "create_module\0"
- "ftime\0"
- "get_kernel_syms\0"
- "getpmsg\0"
- "gtty\0"
- "lock\0"
- "mpx\0"
- "prof\0"
- "profil\0"
- "putpmsg\0"
- "query_module\0"
- "security\0"
- "sgetmask\0"
- "ssetmask\0"
- "stty\0"
- "sysfs\0"
- "tuxcall\0"
- "ulimit\0"
- "uselib\0"
- "ustat\0"
- "vserver\0"
- },
- [SYSCALL_FILTER_SET_PRIVILEGED] = {
- /* Nice grab-bag of all system calls which need superuser capabilities */
- .name = "@privileged",
- .value =
- "@clock\0"
- "@module\0"
- "@raw-io\0"
- "acct\0"
- "bdflush\0"
- "bpf\0"
- "capset\0"
- "chown32\0"
- "chown\0"
- "chroot\0"
- "fchown32\0"
- "fchown\0"
- "fchownat\0"
- "kexec_file_load\0"
- "kexec_load\0"
- "lchown32\0"
- "lchown\0"
- "nfsservctl\0"
- "pivot_root\0"
- "quotactl\0"
- "reboot\0"
- "setdomainname\0"
- "setfsuid32\0"
- "setfsuid\0"
- "setgroups32\0"
- "setgroups\0"
- "sethostname\0"
- "setresuid32\0"
- "setresuid\0"
- "setreuid32\0"
- "setreuid\0"
- "setuid32\0"
- "setuid\0"
- "swapoff\0"
- "swapon\0"
- "_sysctl\0"
- "vhangup\0"
- },
- [SYSCALL_FILTER_SET_PROCESS] = {
- /* Process control, execution, namespaces */
- .name = "@process",
- .value =
- "arch_prctl\0"
- "clone\0"
- "execveat\0"
- "fork\0"
- "kill\0"
- "prctl\0"
- "setns\0"
- "tgkill\0"
- "tkill\0"
- "unshare\0"
- "vfork\0"
- },
- [SYSCALL_FILTER_SET_RAW_IO] = {
- /* Raw I/O ports */
- .name = "@raw-io",
- .value =
- "ioperm\0"
- "iopl\0"
- "pciconfig_iobase\0"
- "pciconfig_read\0"
- "pciconfig_write\0"
-#ifdef __NR_s390_pci_mmio_read
- "s390_pci_mmio_read\0"
-#endif
-#ifdef __NR_s390_pci_mmio_write
- "s390_pci_mmio_write\0"
-#endif
- },
- [SYSCALL_FILTER_SET_RESOURCES] = {
- /* Alter resource settings */
- .name = "@resources",
- .value =
- "sched_setparam\0"
- "sched_setscheduler\0"
- "sched_setaffinity\0"
- "setpriority\0"
- "setrlimit\0"
- "set_mempolicy\0"
- "migrate_pages\0"
- "move_pages\0"
- "mbind\0"
- "sched_setattr\0"
- "prlimit64\0"
- },
-};
-
-const SyscallFilterSet *syscall_filter_set_find(const char *name) {
- unsigned i;
-
- if (isempty(name) || name[0] != '@')
- return NULL;
-
- for (i = 0; i < _SYSCALL_FILTER_SET_MAX; i++)
- if (streq(syscall_filter_sets[i].name, name))
- return syscall_filter_sets + i;
-
- return NULL;
-}
-
-int seccomp_add_syscall_filter_set(scmp_filter_ctx seccomp, const SyscallFilterSet *set, uint32_t action) {
- const char *sys;
- int r;
-
- assert(seccomp);
- assert(set);
-
- NULSTR_FOREACH(sys, set->value) {
- int id;
-
- if (sys[0] == '@') {
- const SyscallFilterSet *other;
-
- other = syscall_filter_set_find(sys);
- if (!other)
- return -EINVAL;
-
- r = seccomp_add_syscall_filter_set(seccomp, other, action);
- } else {
- id = seccomp_syscall_resolve_name(sys);
- if (id == __NR_SCMP_ERROR)
- return -EINVAL;
-
- r = seccomp_rule_add(seccomp, action, id, 0);
- }
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-int seccomp_load_filter_set(uint32_t default_action, const SyscallFilterSet *set, uint32_t action) {
- scmp_filter_ctx seccomp;
- int r;
-
- assert(set);
-
- /* The one-stop solution: allocate a seccomp object, add a filter to it, and apply it */
-
- r = seccomp_init_conservative(&seccomp, default_action);
- if (r < 0)
- return r;
-
- r = seccomp_add_syscall_filter_set(seccomp, set, action);
- if (r < 0)
- goto finish;
-
- r = seccomp_load(seccomp);
-
-finish:
- seccomp_release(seccomp);
- return r;
-
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:43:03 +0000