diff options
Diffstat (limited to 'kernel/t_execregs.c')
| -rw-r--r-- | kernel/t_execregs.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/kernel/t_execregs.c b/kernel/t_execregs.c new file mode 100644 index 000000000000..076a8de9547c --- /dev/null +++ b/kernel/t_execregs.c @@ -0,0 +1,197 @@ +/* $NetBSD: t_execregs.c,v 1.7 2025/04/27 14:30:03 riastradh Exp $ */ + +/*- + * Copyright (c) 2025 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__RCSID("$NetBSD: t_execregs.c,v 1.7 2025/04/27 14:30:03 riastradh Exp $"); + +#include <sys/wait.h> + +#include <atf-c.h> +#include <err.h> +#include <inttypes.h> +#include <limits.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#ifdef HAVE_EXECREGS_TEST + +#include "execregs.h" +#include "isqemu.h" +#include "h_macros.h" + +static void +readregs(int rfd, register_t regs[static NEXECREGS]) +{ + uint8_t *p; + size_t n; + ssize_t nread; + + p = (void *)regs; + n = NEXECREGS*sizeof(regs[0]); + while (n) { + RL(nread = read(rfd, p, n)); + ATF_CHECK_MSG((size_t)nread <= n, + "overlong read: %zu > %zu", (size_t)nread, n); + if (nread == 0) + break; + p += (size_t)nread; + n -= (size_t)nread; + } + ATF_CHECK_EQ_MSG(n, 0, + "truncated read, missing %zu of %zu bytes", + n, NEXECREGS*sizeof(regs[0])); +} + +static void +checkregs(const register_t regs[static NEXECREGS]) +{ + unsigned i; + +#ifdef __hppa__ + if (isQEMU()) { + atf_tc_expect_fail("PR port-hppa/59114: hppa:" + " eager fpu switching for qemu and/or spectre mitigation"); + } +#endif + + for (i = 0; i < NEXECREGS; i++) { + if (regs[i] != 0) { + for (i = 0; i < NEXECREGS; i++) { + fprintf(stderr, "[%s] %"PRIxREGISTER"\n", + regname[i], regs[i]); + } + fprintf(stderr, "\n"); + atf_tc_fail("registers not zeroed"); + } + } +} + +static void +testregs(int child, const int pipefd[static 2], + register_t regs[static NEXECREGS]) +{ + int status; + + RL(close(pipefd[1])); + + readregs(pipefd[0], regs); + + RL(waitpid(child, &status, 0)); + if (WIFSIGNALED(status)) { + atf_tc_fail_nonfatal("child terminated on signal %d (%s)", + WTERMSIG(status), strsignal(WTERMSIG(status))); + } else if (!WIFEXITED(status)) { + atf_tc_fail_nonfatal("child terminated mysteriously," + " status=0x%x", + status); + } else { + ATF_CHECK_MSG(WEXITSTATUS(status) == 0, + "child exited with code %d", WEXITSTATUS(status)); + } + + checkregs(regs); +} + +#endif + +ATF_TC(execregszero); +ATF_TC_HEAD(execregszero, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Test execve(2) zeroes registers"); +} +ATF_TC_BODY(execregszero, tc) +{ +#ifdef HAVE_EXECREGS_TEST + char h_execregs[PATH_MAX]; + int pipefd[2]; + register_t regs[NEXECREGS]; + pid_t child; + + RL(snprintf(h_execregs, sizeof(h_execregs), "%s/h_execregs", + atf_tc_get_config_var(tc, "srcdir"))); + + RL(pipe(pipefd)); + memset(regs, 0x5a, sizeof(regs)); + + RL(child = fork()); + if (child == 0) { + if (dup2(pipefd[1], STDOUT_FILENO) == -1) + err(1, "dup2"); + if (closefrom(STDERR_FILENO + 1) == -1) + err(1, "closefrom"); + if (execregschild(h_execregs) == -1) + err(1, "execve"); + _exit(2); + } + + testregs(child, pipefd, regs); +#else + atf_tc_skip("missing test for PR kern/59084:" + " exec/spawn leaks register content"); +#endif +} + +ATF_TC(spawnregszero); +ATF_TC_HEAD(spawnregszero, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Test posix_spawn(2) zeroes registers"); +} +ATF_TC_BODY(spawnregszero, tc) +{ +#ifdef HAVE_EXECREGS_TEST + char h_execregs[PATH_MAX]; + int pipefd[2]; + register_t regs[NEXECREGS]; + pid_t child; + + RL(snprintf(h_execregs, sizeof(h_execregs), "%s/h_execregs", + atf_tc_get_config_var(tc, "srcdir"))); + + RL(pipe(pipefd)); + memset(regs, 0x5a, sizeof(regs)); + + RL(child = spawnregschild(h_execregs, pipefd[1])); + + testregs(child, pipefd, regs); +#else + atf_tc_skip("missing test for PR kern/59084:" + " exec/spawn leaks register content"); +#endif +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, execregszero); + ATF_TP_ADD_TC(tp, spawnregszero); + + return atf_no_error(); +} |