hw/arm/virt: Merge VirtBoardInfo and VirtMachineState
[qemu.git] / qemu-seccomp.c
1 /*
2 * QEMU seccomp mode 2 support with libseccomp
3 *
4 * Copyright IBM, Corp. 2012
5 *
6 * Authors:
7 * Eduardo Otubo <eotubo@br.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
14 */
15 #include "qemu/osdep.h"
16 #include <seccomp.h>
17 #include "sysemu/seccomp.h"
18
19 /* For some architectures (notably ARM) cacheflush is not supported until
20 * libseccomp 2.2.3, but configure enforces that we are using a more recent
21 * version on those hosts, so it is OK for this check to be less strict.
22 */
23 #if SCMP_VER_MAJOR >= 3
24 #define HAVE_CACHEFLUSH
25 #elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR >= 2
26 #define HAVE_CACHEFLUSH
27 #endif
28
29 struct QemuSeccompSyscall {
30 int32_t num;
31 uint8_t priority;
32 };
33
34 static const struct QemuSeccompSyscall seccomp_whitelist[] = {
35 { SCMP_SYS(timer_settime), 255 },
36 { SCMP_SYS(timer_gettime), 254 },
37 { SCMP_SYS(futex), 253 },
38 { SCMP_SYS(select), 252 },
39 { SCMP_SYS(recvfrom), 251 },
40 { SCMP_SYS(sendto), 250 },
41 { SCMP_SYS(socketcall), 250 },
42 { SCMP_SYS(read), 249 },
43 { SCMP_SYS(io_submit), 249 },
44 { SCMP_SYS(brk), 248 },
45 { SCMP_SYS(clone), 247 },
46 { SCMP_SYS(mmap), 247 },
47 { SCMP_SYS(mprotect), 246 },
48 { SCMP_SYS(execve), 245 },
49 { SCMP_SYS(open), 245 },
50 { SCMP_SYS(ioctl), 245 },
51 { SCMP_SYS(socket), 245 },
52 { SCMP_SYS(setsockopt), 245 },
53 { SCMP_SYS(recvmsg), 245 },
54 { SCMP_SYS(sendmsg), 245 },
55 { SCMP_SYS(accept), 245 },
56 { SCMP_SYS(connect), 245 },
57 { SCMP_SYS(socketpair), 245 },
58 { SCMP_SYS(bind), 245 },
59 { SCMP_SYS(listen), 245 },
60 { SCMP_SYS(semget), 245 },
61 { SCMP_SYS(ipc), 245 },
62 { SCMP_SYS(gettimeofday), 245 },
63 { SCMP_SYS(readlink), 245 },
64 { SCMP_SYS(access), 245 },
65 { SCMP_SYS(prctl), 245 },
66 { SCMP_SYS(signalfd), 245 },
67 { SCMP_SYS(getrlimit), 245 },
68 { SCMP_SYS(getrusage), 245 },
69 { SCMP_SYS(set_tid_address), 245 },
70 { SCMP_SYS(statfs), 245 },
71 { SCMP_SYS(unlink), 245 },
72 { SCMP_SYS(wait4), 245 },
73 { SCMP_SYS(fcntl64), 245 },
74 { SCMP_SYS(fstat64), 245 },
75 { SCMP_SYS(stat64), 245 },
76 { SCMP_SYS(getgid32), 245 },
77 { SCMP_SYS(getegid32), 245 },
78 { SCMP_SYS(getuid32), 245 },
79 { SCMP_SYS(geteuid32), 245 },
80 { SCMP_SYS(sigreturn), 245 },
81 { SCMP_SYS(_newselect), 245 },
82 { SCMP_SYS(_llseek), 245 },
83 { SCMP_SYS(mmap2), 245 },
84 { SCMP_SYS(sigprocmask), 245 },
85 { SCMP_SYS(sched_getparam), 245 },
86 { SCMP_SYS(sched_getscheduler), 245 },
87 { SCMP_SYS(fstat), 245 },
88 { SCMP_SYS(clock_getres), 245 },
89 { SCMP_SYS(sched_get_priority_min), 245 },
90 { SCMP_SYS(sched_get_priority_max), 245 },
91 { SCMP_SYS(stat), 245 },
92 { SCMP_SYS(uname), 245 },
93 { SCMP_SYS(eventfd2), 245 },
94 { SCMP_SYS(io_getevents), 245 },
95 { SCMP_SYS(dup), 245 },
96 { SCMP_SYS(dup2), 245 },
97 { SCMP_SYS(dup3), 245 },
98 { SCMP_SYS(gettid), 245 },
99 { SCMP_SYS(getgid), 245 },
100 { SCMP_SYS(getegid), 245 },
101 { SCMP_SYS(getuid), 245 },
102 { SCMP_SYS(geteuid), 245 },
103 { SCMP_SYS(timer_create), 245 },
104 { SCMP_SYS(times), 245 },
105 { SCMP_SYS(exit), 245 },
106 { SCMP_SYS(clock_gettime), 245 },
107 { SCMP_SYS(time), 245 },
108 { SCMP_SYS(restart_syscall), 245 },
109 { SCMP_SYS(pwrite64), 245 },
110 { SCMP_SYS(nanosleep), 245 },
111 { SCMP_SYS(chown), 245 },
112 { SCMP_SYS(openat), 245 },
113 { SCMP_SYS(getdents), 245 },
114 { SCMP_SYS(timer_delete), 245 },
115 { SCMP_SYS(exit_group), 245 },
116 { SCMP_SYS(rt_sigreturn), 245 },
117 { SCMP_SYS(sync), 245 },
118 { SCMP_SYS(pread64), 245 },
119 { SCMP_SYS(madvise), 245 },
120 { SCMP_SYS(set_robust_list), 245 },
121 { SCMP_SYS(lseek), 245 },
122 { SCMP_SYS(pselect6), 245 },
123 { SCMP_SYS(fork), 245 },
124 { SCMP_SYS(rt_sigprocmask), 245 },
125 { SCMP_SYS(write), 244 },
126 { SCMP_SYS(fcntl), 243 },
127 { SCMP_SYS(tgkill), 242 },
128 { SCMP_SYS(kill), 242 },
129 { SCMP_SYS(rt_sigaction), 242 },
130 { SCMP_SYS(pipe2), 242 },
131 { SCMP_SYS(munmap), 242 },
132 { SCMP_SYS(mremap), 242 },
133 { SCMP_SYS(fdatasync), 242 },
134 { SCMP_SYS(close), 242 },
135 { SCMP_SYS(rt_sigpending), 242 },
136 { SCMP_SYS(rt_sigtimedwait), 242 },
137 { SCMP_SYS(readv), 242 },
138 { SCMP_SYS(writev), 242 },
139 { SCMP_SYS(preadv), 242 },
140 { SCMP_SYS(pwritev), 242 },
141 { SCMP_SYS(setrlimit), 242 },
142 { SCMP_SYS(ftruncate), 242 },
143 { SCMP_SYS(lstat), 242 },
144 { SCMP_SYS(pipe), 242 },
145 { SCMP_SYS(umask), 242 },
146 { SCMP_SYS(chdir), 242 },
147 { SCMP_SYS(setitimer), 242 },
148 { SCMP_SYS(setsid), 242 },
149 { SCMP_SYS(poll), 242 },
150 { SCMP_SYS(epoll_create), 242 },
151 { SCMP_SYS(epoll_ctl), 242 },
152 { SCMP_SYS(epoll_wait), 242 },
153 { SCMP_SYS(waitpid), 242 },
154 { SCMP_SYS(getsockname), 242 },
155 { SCMP_SYS(getpeername), 242 },
156 { SCMP_SYS(accept4), 242 },
157 { SCMP_SYS(timerfd_settime), 242 },
158 { SCMP_SYS(newfstatat), 241 },
159 { SCMP_SYS(shutdown), 241 },
160 { SCMP_SYS(getsockopt), 241 },
161 { SCMP_SYS(semop), 241 },
162 { SCMP_SYS(semtimedop), 241 },
163 { SCMP_SYS(epoll_ctl_old), 241 },
164 { SCMP_SYS(epoll_wait_old), 241 },
165 { SCMP_SYS(epoll_pwait), 241 },
166 { SCMP_SYS(epoll_create1), 241 },
167 { SCMP_SYS(ppoll), 241 },
168 { SCMP_SYS(creat), 241 },
169 { SCMP_SYS(link), 241 },
170 { SCMP_SYS(getpid), 241 },
171 { SCMP_SYS(getppid), 241 },
172 { SCMP_SYS(getpgrp), 241 },
173 { SCMP_SYS(getpgid), 241 },
174 { SCMP_SYS(getsid), 241 },
175 { SCMP_SYS(getdents64), 241 },
176 { SCMP_SYS(getresuid), 241 },
177 { SCMP_SYS(getresgid), 241 },
178 { SCMP_SYS(getgroups), 241 },
179 { SCMP_SYS(getresuid32), 241 },
180 { SCMP_SYS(getresgid32), 241 },
181 { SCMP_SYS(getgroups32), 241 },
182 { SCMP_SYS(signal), 241 },
183 { SCMP_SYS(sigaction), 241 },
184 { SCMP_SYS(sigsuspend), 241 },
185 { SCMP_SYS(sigpending), 241 },
186 { SCMP_SYS(truncate64), 241 },
187 { SCMP_SYS(ftruncate64), 241 },
188 { SCMP_SYS(fchown32), 241 },
189 { SCMP_SYS(chown32), 241 },
190 { SCMP_SYS(lchown32), 241 },
191 { SCMP_SYS(statfs64), 241 },
192 { SCMP_SYS(fstatfs64), 241 },
193 { SCMP_SYS(fstatat64), 241 },
194 { SCMP_SYS(lstat64), 241 },
195 { SCMP_SYS(sendfile64), 241 },
196 { SCMP_SYS(ugetrlimit), 241 },
197 { SCMP_SYS(alarm), 241 },
198 { SCMP_SYS(rt_sigsuspend), 241 },
199 { SCMP_SYS(rt_sigqueueinfo), 241 },
200 { SCMP_SYS(rt_tgsigqueueinfo), 241 },
201 { SCMP_SYS(sigaltstack), 241 },
202 { SCMP_SYS(signalfd4), 241 },
203 { SCMP_SYS(truncate), 241 },
204 { SCMP_SYS(fchown), 241 },
205 { SCMP_SYS(lchown), 241 },
206 { SCMP_SYS(fchownat), 241 },
207 { SCMP_SYS(fstatfs), 241 },
208 { SCMP_SYS(getitimer), 241 },
209 { SCMP_SYS(syncfs), 241 },
210 { SCMP_SYS(fsync), 241 },
211 { SCMP_SYS(fchdir), 241 },
212 { SCMP_SYS(msync), 241 },
213 { SCMP_SYS(sched_setparam), 241 },
214 { SCMP_SYS(sched_setscheduler), 241 },
215 { SCMP_SYS(sched_yield), 241 },
216 { SCMP_SYS(sched_rr_get_interval), 241 },
217 { SCMP_SYS(sched_setaffinity), 241 },
218 { SCMP_SYS(sched_getaffinity), 241 },
219 { SCMP_SYS(readahead), 241 },
220 { SCMP_SYS(timer_getoverrun), 241 },
221 { SCMP_SYS(unlinkat), 241 },
222 { SCMP_SYS(readlinkat), 241 },
223 { SCMP_SYS(faccessat), 241 },
224 { SCMP_SYS(get_robust_list), 241 },
225 { SCMP_SYS(splice), 241 },
226 { SCMP_SYS(vmsplice), 241 },
227 { SCMP_SYS(getcpu), 241 },
228 { SCMP_SYS(sendmmsg), 241 },
229 { SCMP_SYS(recvmmsg), 241 },
230 { SCMP_SYS(prlimit64), 241 },
231 { SCMP_SYS(waitid), 241 },
232 { SCMP_SYS(io_cancel), 241 },
233 { SCMP_SYS(io_setup), 241 },
234 { SCMP_SYS(io_destroy), 241 },
235 { SCMP_SYS(arch_prctl), 240 },
236 { SCMP_SYS(mkdir), 240 },
237 { SCMP_SYS(fchmod), 240 },
238 { SCMP_SYS(shmget), 240 },
239 { SCMP_SYS(shmat), 240 },
240 { SCMP_SYS(shmdt), 240 },
241 { SCMP_SYS(timerfd_create), 240 },
242 { SCMP_SYS(shmctl), 240 },
243 { SCMP_SYS(mlockall), 240 },
244 { SCMP_SYS(mlock), 240 },
245 { SCMP_SYS(munlock), 240 },
246 { SCMP_SYS(semctl), 240 },
247 { SCMP_SYS(fallocate), 240 },
248 { SCMP_SYS(fadvise64), 240 },
249 { SCMP_SYS(inotify_init1), 240 },
250 { SCMP_SYS(inotify_add_watch), 240 },
251 { SCMP_SYS(mbind), 240 },
252 { SCMP_SYS(memfd_create), 240 },
253 #ifdef HAVE_CACHEFLUSH
254 { SCMP_SYS(cacheflush), 240 },
255 #endif
256 { SCMP_SYS(sysinfo), 240 },
257 };
258
259 int seccomp_start(void)
260 {
261 int rc = 0;
262 unsigned int i = 0;
263 scmp_filter_ctx ctx;
264
265 ctx = seccomp_init(SCMP_ACT_KILL);
266 if (ctx == NULL) {
267 rc = -1;
268 goto seccomp_return;
269 }
270
271 for (i = 0; i < ARRAY_SIZE(seccomp_whitelist); i++) {
272 rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, seccomp_whitelist[i].num, 0);
273 if (rc < 0) {
274 goto seccomp_return;
275 }
276 rc = seccomp_syscall_priority(ctx, seccomp_whitelist[i].num,
277 seccomp_whitelist[i].priority);
278 if (rc < 0) {
279 goto seccomp_return;
280 }
281 }
282
283 rc = seccomp_load(ctx);
284
285 seccomp_return:
286 seccomp_release(ctx);
287 return rc;
288 }