mirror of
https://github.com/opencontainers/runc.git
synced 2026-07-11 14:13:58 +08:00
Aleksa Sarai
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/syscall.h>
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static int exit_code = 0;
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/*
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* We need raw wrappers around each syscall so that glibc won't rewrite the
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* errno value when it is returned from the seccomp filter (glibc has a habit
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* of hiding -ENOSYS if possible -- which counters what we're trying to test).
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*/
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#define raw(name, ...) \
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syscall(SYS_ ## name, ##__VA_ARGS__)
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#define syscall_assert(sval, rval) \
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do { \
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int L = (sval), R = (rval); \
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if (L < 0) \
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L = -errno; \
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if (L != R) { \
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printf("syscall_assert(%s == %s) failed: %d != %d\n", #sval, #rval, L, R); \
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exit_code = 32; \
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} \
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} while (0)
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int main(void)
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{
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// Basic permitted syscalls.
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syscall_assert(write(-1, NULL, 0), -EBADF);
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// Basic syscall with masked rules.
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syscall_assert(raw(socket, AF_UNIX, SOCK_STREAM, 0x000), 3);
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syscall_assert(raw(socket, AF_UNIX, SOCK_STREAM, 0x0FF), -EPROTONOSUPPORT);
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syscall_assert(raw(socket, AF_UNIX, SOCK_STREAM, 0x001), 4);
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syscall_assert(raw(socket, AF_UNIX, SOCK_STREAM, 0x100), -EPERM);
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syscall_assert(raw(socket, AF_UNIX, SOCK_STREAM, 0xC00), -EPERM);
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// Multiple arguments with OR rules.
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syscall_assert(raw(process_vm_readv, 100, NULL, 0, NULL, 0, ~0), -EINVAL);
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syscall_assert(raw(process_vm_readv, 9001, NULL, 0, NULL, 0, ~0), -EINVAL);
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syscall_assert(raw(process_vm_readv, 0, NULL, 0, NULL, 0, ~0), -EPERM);
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syscall_assert(raw(process_vm_readv, 0, NULL, 0, NULL, 0, ~0), -EPERM);
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// Multiple arguments with OR rules -- rule is ERRNO(-ENOANO).
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syscall_assert(raw(process_vm_writev, 1337, NULL, 0, NULL, 0, ~0), -ENOANO);
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syscall_assert(raw(process_vm_writev, 2020, NULL, 0, NULL, 0, ~0), -ENOANO);
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syscall_assert(raw(process_vm_writev, 0, NULL, 0, NULL, 0, ~0), -EPERM);
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syscall_assert(raw(process_vm_writev, 0, NULL, 0, NULL, 0, ~0), -EPERM);
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// Multiple arguments with AND rules.
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syscall_assert(raw(kcmp, 0, 1337, 0, 0, 0), -ESRCH);
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syscall_assert(raw(kcmp, 0, 0, 0, 0, 0), -EPERM);
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syscall_assert(raw(kcmp, 500, 1337, 0, 0, 0), -EPERM);
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syscall_assert(raw(kcmp, 500, 500, 0, 0, 0), -EPERM);
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// Multiple rules for the same syscall.
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syscall_assert(raw(dup3, 0, -100, 0xFFFF), -EPERM);
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syscall_assert(raw(dup3, 1, -100, 0xFFFF), -EINVAL);
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syscall_assert(raw(dup3, 2, -100, 0xFFFF), -EPERM);
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syscall_assert(raw(dup3, 3, -100, 0xFFFF), -EINVAL);
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// Explicitly denied syscalls (those in Linux 3.0) get -EPERM.
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syscall_assert(raw(unshare, 0), -EPERM);
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syscall_assert(raw(setns, 0, 0), -EPERM);
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// Out-of-bounds fake syscall.
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syscall_assert(syscall(1000, 0xDEADBEEF, 0xCAFEFEED, 0x1337), -ENOSYS);
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return exit_code;
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}
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