| 1 | |
| 2 | #include <cap-ng.h>
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| 3 | #include <linux/capability.h>
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| 4 | #include <stdbool.h>
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| 5 | #include <string.h>
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| 6 | #include <stdio.h>
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| 7 | #include <sys/prctl.h>
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| 8 | #include <sys/auxv.h>
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| 9 |
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| 10 | #include "kselftest.h"
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| 11 |
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| 12 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
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| 13 | # define HAVE_GETAUXVAL
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| 14 | #endif
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| 15 |
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| 16 | static bool bool_arg(char **argv, int i)
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| 17 | {
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| 18 | if (!strcmp(argv[i], "0"))
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| 19 | return false;
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| 20 | else if (!strcmp(argv[i], "1"))
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| 21 | return true;
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| 22 | else {
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| 23 | ksft_exit_fail_msg("wrong argv[%d]\n", i);
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| 24 | return false;
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| 25 | }
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| 26 | }
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| 27 |
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| 28 | int main(int argc, char **argv)
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| 29 | {
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| 30 | const char *atsec = "";
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| 31 | int ret;
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| 32 |
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| 33 | |
| 34 | * Be careful just in case a setgid or setcapped copy of this
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| 35 | * helper gets out.
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| 36 |
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| 37 |
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| 38 | if (argc != 5)
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| 39 | ksft_exit_fail_msg("wrong argc\n");
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| 40 |
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| 41 | #ifdef HAVE_GETAUXVAL
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| 42 | if (getauxval(AT_SECURE))
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| 43 | atsec = " (AT_SECURE is set)";
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| 44 | else
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| 45 | atsec = " (AT_SECURE is not set)";
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| 46 | #endif
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| 47 |
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| 48 | ret = capng_get_caps_process();
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| 49 | if (ret == -1) {
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| 50 | ksft_print_msg("capng_get_caps_process failed\n");
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| 51 | return 1;
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| 52 | }
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| 53 |
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| 54 | if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
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| 55 | ksft_print_msg("Wrong effective state%s\n", atsec);
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| 56 | return 1;
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| 57 | }
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| 58 |
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| 59 | if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
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| 60 | ksft_print_msg("Wrong permitted state%s\n", atsec);
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| 61 | return 1;
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| 62 | }
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| 63 |
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| 64 | if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
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| 65 | ksft_print_msg("Wrong inheritable state%s\n", atsec);
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| 66 | return 1;
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| 67 | }
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| 68 |
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| 69 | if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
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| 70 | ksft_print_msg("Wrong ambient state%s\n", atsec);
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| 71 | return 1;
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| 72 | }
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| 73 |
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| 74 | ksft_print_msg("%s: Capabilities after execve were correct\n",
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| 75 | "validate_cap:");
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| 76 | return 0;
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| 77 | }
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