2 1a49166d 2021-01-23 op * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
4 e29dbd72 2021-01-23 op * Permission to use, copy, modify, and distribute this software for any
5 e29dbd72 2021-01-23 op * purpose with or without fee is hereby granted, provided that the above
6 e29dbd72 2021-01-23 op * copyright notice and this permission notice appear in all copies.
8 e29dbd72 2021-01-23 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 e29dbd72 2021-01-23 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 e29dbd72 2021-01-23 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 e29dbd72 2021-01-23 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 e29dbd72 2021-01-23 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 e29dbd72 2021-01-23 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 e29dbd72 2021-01-23 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 dafb57b8 2021-01-15 op #include "gmid.h"
19 8bb8cf2a 2021-07-02 op #if DISABLE_SANDBOX
21 8bb8cf2a 2021-07-02 op #warning "Sandbox disabled! Please report issues upstream instead of disabling the sandbox."
24 8bb8cf2a 2021-07-02 op sandbox_server_process(void)
30 8bb8cf2a 2021-07-02 op sandbox_executor_process(void)
32 8bb8cf2a 2021-07-02 op log_notice(NULL, "Sandbox disabled! "
33 8bb8cf2a 2021-07-02 op "Please report issues upstream instead of disabling the sandbox.");
37 8bb8cf2a 2021-07-02 op sandbox_logger_process(void)
42 8bb8cf2a 2021-07-02 op #elif defined(__FreeBSD__)
44 dafb57b8 2021-01-15 op #include <sys/capsicum.h>
47 62e001b0 2021-03-20 op sandbox_server_process(void)
49 dafb57b8 2021-01-15 op if (cap_enter() == -1)
50 8e56d6ad 2021-02-11 op fatal("cap_enter");
54 62e001b0 2021-03-20 op sandbox_executor_process(void)
56 62e001b0 2021-03-20 op /* We cannot capsicum the executor process because it needs
57 62e001b0 2021-03-20 op * to fork(2)+execve(2) cgi scripts */
62 62e001b0 2021-03-20 op sandbox_logger_process(void)
64 62e001b0 2021-03-20 op if (cap_enter() == -1)
65 62e001b0 2021-03-20 op fatal("cap_enter");
68 dafb57b8 2021-01-15 op #elif defined(__linux__)
70 71b7eb2f 2021-01-17 op #include <sys/prctl.h>
71 71b7eb2f 2021-01-17 op #include <sys/syscall.h>
72 71b7eb2f 2021-01-17 op #include <sys/syscall.h>
73 71b7eb2f 2021-01-17 op #include <sys/types.h>
75 71b7eb2f 2021-01-17 op #include <linux/audit.h>
76 71b7eb2f 2021-01-17 op #include <linux/filter.h>
77 71b7eb2f 2021-01-17 op #include <linux/seccomp.h>
79 71b7eb2f 2021-01-17 op #include <errno.h>
80 3c0375e4 2021-01-20 op #include <fcntl.h>
81 71b7eb2f 2021-01-17 op #include <stddef.h>
82 71b7eb2f 2021-01-17 op #include <stdio.h>
83 71b7eb2f 2021-01-17 op #include <string.h>
85 137def5f 2021-07-02 op /* uncomment to enable debugging. ONLY FOR DEVELOPMENT */
86 137def5f 2021-07-02 op /* #define SC_DEBUG */
88 137def5f 2021-07-02 op #ifdef SC_DEBUG
89 137def5f 2021-07-02 op # define SC_FAIL SECCOMP_RET_TRAP
91 137def5f 2021-07-02 op # define SC_FAIL SECCOMP_RET_KILL
94 137def5f 2021-07-02 op #if (BYTE_ORDER == LITTLE_ENDIAN)
95 137def5f 2021-07-02 op # define SC_ARG_LO 0
96 137def5f 2021-07-02 op # define SC_ARG_HI sizeof(uint32_t)
97 137def5f 2021-07-02 op #elif (BYTE_ORDER == BIG_ENDIAN)
98 137def5f 2021-07-02 op # define SC_ARG_LO sizeof(uint32_t)
99 137def5f 2021-07-02 op # define SC_ARG_HI 0
101 137def5f 2021-07-02 op # error "Uknown endian"
104 137def5f 2021-07-02 op /* make the filter more readable */
105 137def5f 2021-07-02 op #define SC_ALLOW(nr) \
106 137def5f 2021-07-02 op BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, __NR_##nr, 0, 1), \
107 137def5f 2021-07-02 op BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ALLOW)
110 137def5f 2021-07-02 op * SC_ALLOW_ARG and the SECCOMP_AUDIT_ARCH below are courtesy of
111 137def5f 2021-07-02 op * https://roy.marples.name/git/dhcpcd/blob/HEAD:/src/privsep-linux.c
113 137def5f 2021-07-02 op #define SC_ALLOW_ARG(_nr, _arg, _val) \
114 137def5f 2021-07-02 op BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, (_nr), 0, 6), \
115 137def5f 2021-07-02 op BPF_STMT(BPF_LD + BPF_W + BPF_ABS, \
116 137def5f 2021-07-02 op offsetof(struct seccomp_data, args[(_arg)]) + SC_ARG_LO), \
117 137def5f 2021-07-02 op BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, \
118 137def5f 2021-07-02 op ((_val) & 0xffffffff), 0, 3), \
119 137def5f 2021-07-02 op BPF_STMT(BPF_LD + BPF_W + BPF_ABS, \
120 137def5f 2021-07-02 op offsetof(struct seccomp_data, args[(_arg)]) + SC_ARG_HI), \
121 137def5f 2021-07-02 op BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, \
122 137def5f 2021-07-02 op (((uint32_t)((uint64_t)(_val) >> 32)) & 0xffffffff), 0, 1), \
123 137def5f 2021-07-02 op BPF_STMT(BPF_RET + BPF_K, SECCOMP_RET_ALLOW), \
124 137def5f 2021-07-02 op BPF_STMT(BPF_LD + BPF_W + BPF_ABS, \
125 137def5f 2021-07-02 op offsetof(struct seccomp_data, nr))
128 137def5f 2021-07-02 op * I personally find this quite nutty. Why can a system header not
129 137def5f 2021-07-02 op * define a default for this?
131 71b7eb2f 2021-01-17 op #if defined(__i386__)
132 71b7eb2f 2021-01-17 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_I386
133 71b7eb2f 2021-01-17 op #elif defined(__x86_64__)
134 71b7eb2f 2021-01-17 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_X86_64
135 137def5f 2021-07-02 op #elif defined(__arc__)
136 137def5f 2021-07-02 op # if defined(__A7__)
137 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
138 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARCOMPACT
140 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARCOMPACTBE
142 137def5f 2021-07-02 op # elif defined(__HS__)
143 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
144 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARCV2
146 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARCV2BE
149 137def5f 2021-07-02 op # error "Platform does not support seccomp filter yet"
151 71b7eb2f 2021-01-17 op #elif defined(__arm__)
152 137def5f 2021-07-02 op # ifndef EM_ARM
153 137def5f 2021-07-02 op # define EM_ARM 40
155 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
156 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARM
158 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ARMEB
160 71b7eb2f 2021-01-17 op #elif defined(__aarch64__)
161 71b7eb2f 2021-01-17 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_AARCH64
162 137def5f 2021-07-02 op #elif defined(__alpha__)
163 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_ALPHA
164 137def5f 2021-07-02 op #elif defined(__hppa__)
165 137def5f 2021-07-02 op # if defined(__LP64__)
166 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PARISC64
168 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PARISC
170 137def5f 2021-07-02 op #elif defined(__ia64__)
171 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_IA64
172 137def5f 2021-07-02 op #elif defined(__microblaze__)
173 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MICROBLAZE
174 137def5f 2021-07-02 op #elif defined(__m68k__)
175 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_M68K
176 71b7eb2f 2021-01-17 op #elif defined(__mips__)
177 137def5f 2021-07-02 op # if defined(__MIPSEL__)
178 137def5f 2021-07-02 op # if defined(__LP64__)
179 71b7eb2f 2021-01-17 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MIPSEL64
181 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MIPSEL
183 137def5f 2021-07-02 op # elif defined(__LP64__)
184 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MIPS64
186 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_MIPS
188 137def5f 2021-07-02 op #elif defined(__nds32__)
189 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
190 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_NDS32
192 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_NDS32BE
194 137def5f 2021-07-02 op #elif defined(__nios2__)
195 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_NIOS2
196 137def5f 2021-07-02 op #elif defined(__or1k__)
197 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_OPENRISC
198 137def5f 2021-07-02 op #elif defined(__powerpc64__)
199 b24021d4 2021-07-03 op # if (BYTE_ORDER == LITTLE_ENDIAN)
200 b24021d4 2021-07-03 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PPC64LE
202 b24021d4 2021-07-03 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PPC64
204 137def5f 2021-07-02 op #elif defined(__powerpc__)
205 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_PPC
206 137def5f 2021-07-02 op #elif defined(__riscv)
207 137def5f 2021-07-02 op # if defined(__LP64__)
208 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_RISCV64
210 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_RISCV32
212 137def5f 2021-07-02 op #elif defined(__s390x__)
213 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_S390X
214 137def5f 2021-07-02 op #elif defined(__s390__)
215 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_S390
216 137def5f 2021-07-02 op #elif defined(__sh__)
217 137def5f 2021-07-02 op # if defined(__LP64__)
218 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
219 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SHEL64
221 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SH64
224 137def5f 2021-07-02 op # if (BYTE_ORDER == LITTLE_ENDIAN)
225 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SHEL
227 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SH
230 137def5f 2021-07-02 op #elif defined(__sparc__)
231 137def5f 2021-07-02 op # if defined(__arch64__)
232 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SPARC64
234 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_SPARC
236 137def5f 2021-07-02 op #elif defined(__xtensa__)
237 137def5f 2021-07-02 op # define SECCOMP_AUDIT_ARCH AUDIT_ARCH_XTENSA
239 71b7eb2f 2021-01-17 op # error "Platform does not support seccomp filter yet"
242 137def5f 2021-07-02 op static struct sock_filter filter[] = {
243 137def5f 2021-07-02 op /* load the *current* architecture */
244 137def5f 2021-07-02 op BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
245 137def5f 2021-07-02 op (offsetof(struct seccomp_data, arch))),
246 137def5f 2021-07-02 op /* ensure it's the same that we've been compiled on */
247 137def5f 2021-07-02 op BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,
248 137def5f 2021-07-02 op SECCOMP_AUDIT_ARCH, 1, 0),
249 137def5f 2021-07-02 op /* if not, kill the program */
250 137def5f 2021-07-02 op BPF_STMT(BPF_RET | BPF_K, SC_FAIL),
252 137def5f 2021-07-02 op /* load the syscall number */
253 137def5f 2021-07-02 op BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
254 137def5f 2021-07-02 op (offsetof(struct seccomp_data, nr))),
256 137def5f 2021-07-02 op #ifdef __NR_accept
257 137def5f 2021-07-02 op SC_ALLOW(accept),
259 137def5f 2021-07-02 op #ifdef __NR_accept4
260 137def5f 2021-07-02 op SC_ALLOW(accept4),
262 137def5f 2021-07-02 op #ifdef __NR_brk
263 137def5f 2021-07-02 op SC_ALLOW(brk),
265 137def5f 2021-07-02 op #ifdef __NR_clock_gettime
266 137def5f 2021-07-02 op SC_ALLOW(clock_gettime),
268 137def5f 2021-07-02 op #if defined(__x86_64__) && defined(__ILP32__) && defined(__X32_SYSCALL_BIT)
269 137def5f 2021-07-02 op SECCOMP_ALLOW(__NR_clock_gettime & ~__X32_SYSCALL_BIT),
271 137def5f 2021-07-02 op #ifdef __NR_clock_gettime64
272 137def5f 2021-07-02 op SC_ALLOW(clock_gettime64),
274 137def5f 2021-07-02 op #ifdef __NR_close
275 137def5f 2021-07-02 op SC_ALLOW(close),
277 137def5f 2021-07-02 op #ifdef __NR_epoll_ctl
278 137def5f 2021-07-02 op SC_ALLOW(epoll_ctl),
280 137def5f 2021-07-02 op #ifdef __NR_epoll_pwait
281 137def5f 2021-07-02 op SC_ALLOW(epoll_pwait),
283 137def5f 2021-07-02 op #ifdef __NR_epoll_wait
284 137def5f 2021-07-02 op SC_ALLOW(epoll_wait),
286 137def5f 2021-07-02 op #ifdef __NR_exit
287 137def5f 2021-07-02 op SC_ALLOW(exit),
289 137def5f 2021-07-02 op #ifdef __NR_exit_group
290 137def5f 2021-07-02 op SC_ALLOW(exit_group),
292 137def5f 2021-07-02 op #ifdef __NR_fcntl
293 137def5f 2021-07-02 op SC_ALLOW(fcntl),
295 137def5f 2021-07-02 op #ifdef __NR_fcntl64
296 137def5f 2021-07-02 op SC_ALLOW(fcntl64),
298 137def5f 2021-07-02 op #ifdef __NR_fstat
299 137def5f 2021-07-02 op SC_ALLOW(fstat),
301 137def5f 2021-07-02 op #ifdef __NR_getdents64
302 137def5f 2021-07-02 op SC_ALLOW(getdents64),
304 137def5f 2021-07-02 op #ifdef __NR_getpid
305 137def5f 2021-07-02 op SC_ALLOW(getpid),
307 137def5f 2021-07-02 op #ifdef __NR_getrandom
308 137def5f 2021-07-02 op SC_ALLOW(getrandom),
310 137def5f 2021-07-02 op #ifdef __NR_gettimeofday
311 137def5f 2021-07-02 op SC_ALLOW(gettimeofday),
313 137def5f 2021-07-02 op #ifdef __NR_ioctl
314 137def5f 2021-07-02 op /* allow ioctl only on fd 1, glibc doing stuff? */
315 137def5f 2021-07-02 op SC_ALLOW_ARG(__NR_ioctl, 0, 1),
317 137def5f 2021-07-02 op #ifdef __NR_lseek
318 137def5f 2021-07-02 op SC_ALLOW(lseek),
320 137def5f 2021-07-02 op #ifdef __NR_madvise
321 137def5f 2021-07-02 op SC_ALLOW(madvise),
323 137def5f 2021-07-02 op #ifdef __NR_mmap
324 137def5f 2021-07-02 op SC_ALLOW(mmap),
326 137def5f 2021-07-02 op #ifdef __NR_mmap2
327 137def5f 2021-07-02 op SC_ALLOW(mmap2),
329 137def5f 2021-07-02 op #ifdef __NR_munmap
330 137def5f 2021-07-02 op SC_ALLOW(munmap),
332 137def5f 2021-07-02 op #ifdef __NR_newfstatat
333 137def5f 2021-07-02 op SC_ALLOW(newfstatat),
335 137def5f 2021-07-02 op #ifdef __NR_oldfstat
336 137def5f 2021-07-02 op SC_ALLOW(oldfstat),
338 137def5f 2021-07-02 op #ifdef __NR_openat
339 137def5f 2021-07-02 op SC_ALLOW(openat),
341 137def5f 2021-07-02 op #ifdef __NR_prlimit64
342 137def5f 2021-07-02 op SC_ALLOW(prlimit64),
344 137def5f 2021-07-02 op #ifdef __NR_read
345 137def5f 2021-07-02 op SC_ALLOW(read),
347 137def5f 2021-07-02 op #ifdef __NR_recvmsg
348 137def5f 2021-07-02 op SC_ALLOW(recvmsg),
350 137def5f 2021-07-02 op #ifdef __NR_redav
351 137def5f 2021-07-02 op SC_ALLOW(redav),
353 137def5f 2021-07-02 op #ifdef __NR_rt_sigaction
354 137def5f 2021-07-02 op SC_ALLOW(rt_sigaction),
356 137def5f 2021-07-02 op #ifdef __NR_rt_sigreturn
357 137def5f 2021-07-02 op SC_ALLOW(rt_sigreturn),
359 137def5f 2021-07-02 op #ifdef __NR_sendmsg
360 137def5f 2021-07-02 op SC_ALLOW(sendmsg),
362 137def5f 2021-07-02 op #ifdef __NR_statx
363 137def5f 2021-07-02 op SC_ALLOW(statx),
365 137def5f 2021-07-02 op #ifdef __NR_write
366 137def5f 2021-07-02 op SC_ALLOW(write),
368 137def5f 2021-07-02 op #ifdef __NR_writev
369 137def5f 2021-07-02 op SC_ALLOW(writev),
372 4aa1dd55 2021-07-03 op /* disallow everything else */
373 137def5f 2021-07-02 op BPF_STMT(BPF_RET | BPF_K, SC_FAIL),
376 71b7eb2f 2021-01-17 op #ifdef SC_DEBUG
378 71b7eb2f 2021-01-17 op #include <signal.h>
379 71b7eb2f 2021-01-17 op #include <unistd.h>
382 71b7eb2f 2021-01-17 op sandbox_seccomp_violation(int signum, siginfo_t *info, void *ctx)
384 71b7eb2f 2021-01-17 op (void)signum;
387 71b7eb2f 2021-01-17 op fprintf(stderr, "%s: unexpected system call (arch:0x%x,syscall:%d @ %p)\n",
388 71b7eb2f 2021-01-17 op __func__, info->si_arch, info->si_syscall, info->si_call_addr);
393 71b7eb2f 2021-01-17 op sandbox_seccomp_catch_sigsys(void)
395 71b7eb2f 2021-01-17 op struct sigaction act;
396 71b7eb2f 2021-01-17 op sigset_t mask;
398 71b7eb2f 2021-01-17 op memset(&act, 0, sizeof(act));
399 71b7eb2f 2021-01-17 op sigemptyset(&mask);
400 71b7eb2f 2021-01-17 op sigaddset(&mask, SIGSYS);
402 71b7eb2f 2021-01-17 op act.sa_sigaction = &sandbox_seccomp_violation;
403 71b7eb2f 2021-01-17 op act.sa_flags = SA_SIGINFO;
404 8e56d6ad 2021-02-11 op if (sigaction(SIGSYS, &act, NULL) == -1)
405 8e56d6ad 2021-02-11 op fatal("%s: sigaction(SIGSYS): %s",
406 71b7eb2f 2021-01-17 op __func__, strerror(errno));
408 8e56d6ad 2021-02-11 op if (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1)
409 8e56d6ad 2021-02-11 op fatal("%s: sigprocmask(SIGSYS): %s\n",
410 71b7eb2f 2021-01-17 op __func__, strerror(errno));
412 71b7eb2f 2021-01-17 op #endif /* SC_DEBUG */
415 62e001b0 2021-03-20 op sandbox_server_process(void)
417 71b7eb2f 2021-01-17 op struct sock_fprog prog = {
418 71b7eb2f 2021-01-17 op .len = (unsigned short) (sizeof(filter) / sizeof(filter[0])),
419 71b7eb2f 2021-01-17 op .filter = filter,
422 71b7eb2f 2021-01-17 op #ifdef SC_DEBUG
423 71b7eb2f 2021-01-17 op sandbox_seccomp_catch_sigsys();
426 8e56d6ad 2021-02-11 op if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) == -1)
427 8e56d6ad 2021-02-11 op fatal("%s: prctl(PR_SET_NO_NEW_PRIVS): %s",
428 71b7eb2f 2021-01-17 op __func__, strerror(errno));
430 8e56d6ad 2021-02-11 op if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog) == -1)
431 8e56d6ad 2021-02-11 op fatal("%s: prctl(PR_SET_SECCOMP): %s\n",
432 71b7eb2f 2021-01-17 op __func__, strerror(errno));
436 62e001b0 2021-03-20 op sandbox_executor_process(void)
438 62e001b0 2021-03-20 op /* We cannot use seccomp for the executor process because we
439 62e001b0 2021-03-20 op * don't know what the child will do. Also, our filter will
440 62e001b0 2021-03-20 op * be inherited so the child cannot set its own seccomp
446 62e001b0 2021-03-20 op sandbox_logger_process(void)
448 62e001b0 2021-03-20 op /* To be honest, here we could use a seccomp policy to only
449 62e001b0 2021-03-20 op * allow writev(2) and memory allocations. */
453 dafb57b8 2021-01-15 op #elif defined(__OpenBSD__)
455 dafb57b8 2021-01-15 op #include <unistd.h>
458 62e001b0 2021-03-20 op sandbox_server_process(void)
460 fdea6aa0 2021-04-30 op struct vhost *h;
461 fdea6aa0 2021-04-30 op struct location *l;
463 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
464 fdea6aa0 2021-04-30 op TAILQ_FOREACH(l, &h->locations, locations) {
465 fdea6aa0 2021-04-30 op if (l->dir == NULL)
468 fdea6aa0 2021-04-30 op if (unveil(l->dir, "r") == -1)
469 fdea6aa0 2021-04-30 op fatal("unveil %s for domain %s",
475 881a9dd9 2021-01-16 op if (pledge("stdio recvfd rpath inet", NULL) == -1)
476 8e56d6ad 2021-02-11 op fatal("pledge");
480 62e001b0 2021-03-20 op sandbox_executor_process(void)
482 b8e64ccd 2021-03-31 op struct vhost *h;
483 fdea6aa0 2021-04-30 op struct location *l;
484 8ad1c570 2021-05-09 op struct fcgi *f;
487 b8e64ccd 2021-03-31 op TAILQ_FOREACH(h, &hosts, vhosts) {
488 fdea6aa0 2021-04-30 op TAILQ_FOREACH(l, &h->locations, locations) {
489 fdea6aa0 2021-04-30 op if (l->dir == NULL)
492 fdea6aa0 2021-04-30 op /* r so we can chdir into the correct directory */
493 fdea6aa0 2021-04-30 op if (unveil(l->dir, "rx") == -1)
494 fdea6aa0 2021-04-30 op fatal("unveil %s for domain %s",
495 fdea6aa0 2021-04-30 op l->dir, h->domain);
499 8ad1c570 2021-05-09 op for (i = 0; i < FCGI_MAX; i++) {
500 8ad1c570 2021-05-09 op f = &fcgi[i];
501 8ad1c570 2021-05-09 op if (f->path != NULL) {
502 8ad1c570 2021-05-09 op if (unveil(f->path, "rw") == -1)
503 8ad1c570 2021-05-09 op fatal("unveil %s", f->path);
506 8ad1c570 2021-05-09 op if (f->prog != NULL) {
507 8ad1c570 2021-05-09 op if (unveil(f->prog, "rx") == -1)
508 8ad1c570 2021-05-09 op fatal("unveil %s", f->prog);
513 8ad1c570 2021-05-09 op * rpath: to chdir into the correct directory
514 8ad1c570 2021-05-09 op * proc exec: CGI
515 8ad1c570 2021-05-09 op * dns inet unix: FastCGI
517 8ad1c570 2021-05-09 op if (pledge("stdio rpath sendfd proc exec dns inet unix", NULL))
518 62e001b0 2021-03-20 op err(1, "pledge");
522 62e001b0 2021-03-20 op sandbox_logger_process(void)
524 e952c505 2021-06-15 op if (pledge("stdio recvfd", NULL) == -1)
525 62e001b0 2021-03-20 op err(1, "pledge");
530 62e001b0 2021-03-20 op #warning "No sandbox method known for this OS"
533 62e001b0 2021-03-20 op sandbox_server_process(void)
539 62e001b0 2021-03-20 op sandbox_executor_process(void)
541 2a911637 2021-02-11 op log_notice(NULL, "no sandbox method known for this OS");
545 62e001b0 2021-03-20 op sandbox_logger_process(void)