Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Benjamin Gray | 1066 | 99.26% | 2 | 66.67% |
Michael Ellerman | 8 | 0.74% | 1 | 33.33% |
Total | 1074 | 3 |
// SPDX-License-Identifier: GPL-2.0-or-later #include <errno.h> #include <fcntl.h> #include <stdlib.h> #include <string.h> #include <sys/prctl.h> #include <unistd.h> #include "dexcr.h" #include "utils.h" /* * Helper function for testing the behaviour of a newly exec-ed process */ static int dexcr_prctl_onexec_test_child(unsigned long which, const char *status) { unsigned long dexcr = mfspr(SPRN_DEXCR_RO); unsigned long aspect = pr_which_to_aspect(which); int ctrl = pr_get_dexcr(which); if (!strcmp(status, "set")) { FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET), "setting aspect across exec not applied"); FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "setting aspect across exec not inherited"); FAIL_IF_EXIT_MSG(!(aspect & dexcr), "setting aspect across exec did not take effect"); } else if (!strcmp(status, "clear")) { FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "clearing aspect across exec not applied"); FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "clearing aspect across exec not inherited"); FAIL_IF_EXIT_MSG(aspect & dexcr, "clearing aspect across exec did not take effect"); } else { FAIL_IF_EXIT_MSG(true, "unknown expected status"); } return 0; } /* * Test that the given prctl value can be manipulated freely */ static int dexcr_prctl_aspect_test(unsigned long which) { unsigned long aspect = pr_which_to_aspect(which); pid_t pid; int ctrl; int err; int errno_save; SKIP_IF_MSG(!dexcr_exists(), "DEXCR not supported"); SKIP_IF_MSG(!pr_dexcr_aspect_supported(which), "DEXCR aspect not supported"); SKIP_IF_MSG(!pr_dexcr_aspect_editable(which), "DEXCR aspect not editable with prctl"); /* We reject invalid combinations of arguments */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR); errno_save = errno; FAIL_IF_MSG(err != -1, "simultaneous set and clear should be rejected"); FAIL_IF_MSG(errno_save != EINVAL, "simultaneous set and clear should be rejected with EINVAL"); err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET_ONEXEC | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC); errno_save = errno; FAIL_IF_MSG(err != -1, "simultaneous set and clear on exec should be rejected"); FAIL_IF_MSG(errno_save != EINVAL, "simultaneous set and clear on exec should be rejected with EINVAL"); /* We set the aspect */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET), "config value not PR_PPC_DEXCR_CTRL_SET"); FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_CLEAR, "config value unexpected clear flag"); FAIL_IF_MSG(!(aspect & mfspr(SPRN_DEXCR_RO)), "setting aspect did not take effect"); /* We clear the aspect */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "config value not PR_PPC_DEXCR_CTRL_CLEAR"); FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_SET, "config value unexpected set flag"); FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "clearing aspect did not take effect"); /* We make it set on exec (doesn't change our current value) */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET_ONEXEC); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET_ONEXEC failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "process aspect should still be cleared"); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_SET_ONEXEC"); FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC, "config value unexpected clear on exec flag"); FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "scheduling aspect to set on exec should not change it now"); /* We make it clear on exec (doesn't change our current value) */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "process aspect config should still be cleared"); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC"); FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC, "config value unexpected set on exec flag"); FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "process aspect should still be cleared"); /* We allow setting the current and on-exec value in a single call */ err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET), "config value not PR_PPC_DEXCR_CTRL_SET"); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC"); FAIL_IF_MSG(!(aspect & mfspr(SPRN_DEXCR_RO)), "process aspect should be set"); err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR | PR_PPC_DEXCR_CTRL_SET_ONEXEC); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR | PR_PPC_DEXCR_CTRL_SET_ONEXEC failed"); ctrl = pr_get_dexcr(which); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "config value not PR_PPC_DEXCR_CTRL_CLEAR"); FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_SET_ONEXEC"); FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "process aspect should be clear"); /* Verify the onexec value is applied across exec */ pid = fork(); if (!pid) { char which_str[32] = {}; char *args[] = { "dexcr_prctl_onexec_test_child", which_str, "set", NULL }; unsigned int ctrl = pr_get_dexcr(which); sprintf(which_str, "%lu", which); FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "setting aspect on exec not copied across fork"); FAIL_IF_EXIT_MSG(mfspr(SPRN_DEXCR_RO) & aspect, "setting aspect on exec wrongly applied to fork"); execve("/proc/self/exe", args, NULL); _exit(errno); } await_child_success(pid); err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC); FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed"); pid = fork(); if (!pid) { char which_str[32] = {}; char *args[] = { "dexcr_prctl_onexec_test_child", which_str, "clear", NULL }; unsigned int ctrl = pr_get_dexcr(which); sprintf(which_str, "%lu", which); FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "clearing aspect on exec not copied across fork"); FAIL_IF_EXIT_MSG(!(mfspr(SPRN_DEXCR_RO) & aspect), "clearing aspect on exec wrongly applied to fork"); execve("/proc/self/exe", args, NULL); _exit(errno); } await_child_success(pid); return 0; } static int dexcr_prctl_ibrtpd_test(void) { return dexcr_prctl_aspect_test(PR_PPC_DEXCR_IBRTPD); } static int dexcr_prctl_srapd_test(void) { return dexcr_prctl_aspect_test(PR_PPC_DEXCR_SRAPD); } static int dexcr_prctl_nphie_test(void) { return dexcr_prctl_aspect_test(PR_PPC_DEXCR_NPHIE); } int main(int argc, char *argv[]) { int err = 0; /* * Some tests require checking what happens across exec, so we may be * invoked as the child of a particular test */ if (argc > 1) { if (argc == 3 && !strcmp(argv[0], "dexcr_prctl_onexec_test_child")) { unsigned long which; err = parse_ulong(argv[1], strlen(argv[1]), &which, 10); FAIL_IF_MSG(err, "failed to parse which value for child"); return dexcr_prctl_onexec_test_child(which, argv[2]); } FAIL_IF_MSG(true, "unknown test case"); } /* * Otherwise we are the main test invocation and run the full suite */ err |= test_harness(dexcr_prctl_ibrtpd_test, "dexcr_prctl_ibrtpd"); err |= test_harness(dexcr_prctl_srapd_test, "dexcr_prctl_srapd"); err |= test_harness(dexcr_prctl_nphie_test, "dexcr_prctl_nphie"); return err; }
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