root / qemu-seccomp.c @ ef5b2344
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1 | 2f668be7 | Eduardo Otubo | /*
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2 | 2f668be7 | Eduardo Otubo | * QEMU seccomp mode 2 support with libseccomp
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3 | 2f668be7 | Eduardo Otubo | *
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4 | 2f668be7 | Eduardo Otubo | * Copyright IBM, Corp. 2012
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5 | 2f668be7 | Eduardo Otubo | *
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6 | 2f668be7 | Eduardo Otubo | * Authors:
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7 | 2f668be7 | Eduardo Otubo | * Eduardo Otubo <eotubo@br.ibm.com>
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8 | 2f668be7 | Eduardo Otubo | *
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9 | 2f668be7 | Eduardo Otubo | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 2f668be7 | Eduardo Otubo | * the COPYING file in the top-level directory.
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11 | 2f668be7 | Eduardo Otubo | *
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12 | 2f668be7 | Eduardo Otubo | * Contributions after 2012-01-13 are licensed under the terms of the
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13 | 2f668be7 | Eduardo Otubo | * GNU GPL, version 2 or (at your option) any later version.
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14 | 2f668be7 | Eduardo Otubo | */
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15 | 2f668be7 | Eduardo Otubo | #include <stdio.h> |
16 | 2f668be7 | Eduardo Otubo | #include <seccomp.h> |
17 | 2f668be7 | Eduardo Otubo | #include "qemu-seccomp.h" |
18 | 2f668be7 | Eduardo Otubo | |
19 | 2f668be7 | Eduardo Otubo | struct QemuSeccompSyscall {
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20 | 2f668be7 | Eduardo Otubo | int32_t num; |
21 | 2f668be7 | Eduardo Otubo | uint8_t priority; |
22 | 2f668be7 | Eduardo Otubo | }; |
23 | 2f668be7 | Eduardo Otubo | |
24 | 2f668be7 | Eduardo Otubo | static const struct QemuSeccompSyscall seccomp_whitelist[] = { |
25 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(timer_settime), 255 },
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26 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(timer_gettime), 254 },
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27 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(futex), 253 },
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28 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(select), 252 },
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29 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(recvfrom), 251 },
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30 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sendto), 250 },
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31 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(read), 249 },
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32 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(brk), 248 },
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33 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(clone), 247 },
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34 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(mmap), 247 },
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35 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(mprotect), 246 },
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36 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(execve), 245 },
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37 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(open), 245 },
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38 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(ioctl), 245 },
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39 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(recvmsg), 245 },
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40 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sendmsg), 245 },
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41 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(accept), 245 },
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42 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(connect), 245 },
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43 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(gettimeofday), 245 },
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44 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(readlink), 245 },
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45 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(access), 245 },
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46 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(prctl), 245 },
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47 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(signalfd), 245 },
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48 | 2f668be7 | Eduardo Otubo | #if defined(__i386__)
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49 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fcntl64), 245 },
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50 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fstat64), 245 },
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51 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(stat64), 245 },
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52 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getgid32), 245 },
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53 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getegid32), 245 },
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54 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getuid32), 245 },
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55 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(geteuid32), 245 },
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56 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sigreturn), 245 },
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57 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(_newselect), 245 },
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58 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(_llseek), 245 },
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59 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(mmap2), 245},
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60 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sigprocmask), 245 },
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61 | 2f668be7 | Eduardo Otubo | #elif defined(__x86_64__)
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62 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sched_getparam), 245},
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63 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sched_getscheduler), 245},
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64 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fstat), 245},
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65 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(clock_getres), 245},
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66 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sched_get_priority_min), 245},
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67 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sched_get_priority_max), 245},
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68 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(stat), 245},
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69 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(socket), 245},
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70 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(setsockopt), 245},
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71 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(uname), 245},
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72 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(semget), 245},
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73 | 2f668be7 | Eduardo Otubo | #endif
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74 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(eventfd2), 245 },
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75 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(dup), 245 },
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76 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(gettid), 245 },
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77 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(timer_create), 245 },
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78 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(exit), 245 },
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79 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(clock_gettime), 245 },
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80 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(time), 245 },
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81 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(restart_syscall), 245 },
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82 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(pwrite64), 245 },
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83 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(chown), 245 },
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84 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(openat), 245 },
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85 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getdents), 245 },
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86 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(timer_delete), 245 },
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87 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(exit_group), 245 },
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88 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(rt_sigreturn), 245 },
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89 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(sync), 245 },
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90 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(pread64), 245 },
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91 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(madvise), 245 },
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92 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(set_robust_list), 245 },
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93 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(lseek), 245 },
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94 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(pselect6), 245 },
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95 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fork), 245 },
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96 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(bind), 245 },
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97 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(listen), 245 },
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98 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(eventfd), 245 },
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99 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(rt_sigprocmask), 245 },
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100 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(write), 244 },
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101 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fcntl), 243 },
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102 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(tgkill), 242 },
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103 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(rt_sigaction), 242 },
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104 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(pipe2), 242 },
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105 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(munmap), 242 },
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106 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(mremap), 242 },
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107 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getsockname), 242 },
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108 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(getpeername), 242 },
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109 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(fdatasync), 242 },
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110 | 2f668be7 | Eduardo Otubo | { SCMP_SYS(close), 242 }
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111 | 2f668be7 | Eduardo Otubo | }; |
112 | 2f668be7 | Eduardo Otubo | |
113 | 2f668be7 | Eduardo Otubo | int seccomp_start(void) |
114 | 2f668be7 | Eduardo Otubo | { |
115 | 2f668be7 | Eduardo Otubo | int rc = 0; |
116 | 2f668be7 | Eduardo Otubo | unsigned int i = 0; |
117 | 2f668be7 | Eduardo Otubo | scmp_filter_ctx ctx; |
118 | 2f668be7 | Eduardo Otubo | |
119 | 2f668be7 | Eduardo Otubo | ctx = seccomp_init(SCMP_ACT_KILL); |
120 | 2f668be7 | Eduardo Otubo | if (ctx == NULL) { |
121 | 2f668be7 | Eduardo Otubo | goto seccomp_return;
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122 | 2f668be7 | Eduardo Otubo | } |
123 | 2f668be7 | Eduardo Otubo | |
124 | 2f668be7 | Eduardo Otubo | for (i = 0; i < ARRAY_SIZE(seccomp_whitelist); i++) { |
125 | 2f668be7 | Eduardo Otubo | rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, seccomp_whitelist[i].num, 0);
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126 | 2f668be7 | Eduardo Otubo | if (rc < 0) { |
127 | 2f668be7 | Eduardo Otubo | goto seccomp_return;
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128 | 2f668be7 | Eduardo Otubo | } |
129 | 2f668be7 | Eduardo Otubo | rc = seccomp_syscall_priority(ctx, seccomp_whitelist[i].num, |
130 | 2f668be7 | Eduardo Otubo | seccomp_whitelist[i].priority); |
131 | 2f668be7 | Eduardo Otubo | if (rc < 0) { |
132 | 2f668be7 | Eduardo Otubo | goto seccomp_return;
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133 | 2f668be7 | Eduardo Otubo | } |
134 | 2f668be7 | Eduardo Otubo | } |
135 | 2f668be7 | Eduardo Otubo | |
136 | 2f668be7 | Eduardo Otubo | rc = seccomp_load(ctx); |
137 | 2f668be7 | Eduardo Otubo | |
138 | 2f668be7 | Eduardo Otubo | seccomp_return:
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139 | 2f668be7 | Eduardo Otubo | seccomp_release(ctx); |
140 | 2f668be7 | Eduardo Otubo | return rc;
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141 | 2f668be7 | Eduardo Otubo | } |