1 files changed, 0 insertions, 160 deletions

diff --git a/tools/testing/selftests/openat2/rename_attack_test.c b/tools/testing/selftests/openat2/rename_attack_test.c
deleted file mode 100644
index 0a770728b436..000000000000
--- a/tools/testing/selftests/openat2/rename_attack_test.c
+++ /dev/null
@@ -1,160 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Author: Aleksa Sarai <cyphar@cyphar.com>
- * Copyright (C) 2018-2019 SUSE LLC.
- */
-
-#define _GNU_SOURCE
-#include <errno.h>
-#include <fcntl.h>
-#include <sched.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include <syscall.h>
-#include <limits.h>
-#include <unistd.h>
-
-#include "../kselftest.h"
-#include "helpers.h"
-
-/* Construct a test directory with the following structure:
- *
- * root/
- * |-- a/
- * |   `-- c/
- * `-- b/
- */
-int setup_testdir(void)
-{
-	int dfd;
-	char dirname[] = "/tmp/ksft-openat2-rename-attack.XXXXXX";
-
-	/* Make the top-level directory. */
-	if (!mkdtemp(dirname))
-		ksft_exit_fail_msg("setup_testdir: failed to create tmpdir\n");
-	dfd = open(dirname, O_PATH | O_DIRECTORY);
-	if (dfd < 0)
-		ksft_exit_fail_msg("setup_testdir: failed to open tmpdir\n");
-
-	E_mkdirat(dfd, "a", 0755);
-	E_mkdirat(dfd, "b", 0755);
-	E_mkdirat(dfd, "a/c", 0755);
-
-	return dfd;
-}
-
-/* Swap @dirfd/@a and @dirfd/@b constantly. Parent must kill this process. */
-pid_t spawn_attack(int dirfd, char *a, char *b)
-{
-	pid_t child = fork();
-	if (child != 0)
-		return child;
-
-	/* If the parent (the test process) dies, kill ourselves too. */
-	E_prctl(PR_SET_PDEATHSIG, SIGKILL);
-
-	/* Swap @a and @b. */
-	for (;;)
-		renameat2(dirfd, a, dirfd, b, RENAME_EXCHANGE);
-	exit(1);
-}
-
-#define NUM_RENAME_TESTS 2
-#define ROUNDS 400000
-
-const char *flagname(int resolve)
-{
-	switch (resolve) {
-	case RESOLVE_IN_ROOT:
-		return "RESOLVE_IN_ROOT";
-	case RESOLVE_BENEATH:
-		return "RESOLVE_BENEATH";
-	}
-	return "(unknown)";
-}
-
-void test_rename_attack(int resolve)
-{
-	int dfd, afd;
-	pid_t child;
-	void (*resultfn)(const char *msg, ...) = ksft_test_result_pass;
-	int escapes = 0, other_errs = 0, exdevs = 0, eagains = 0, successes = 0;
-
-	struct open_how how = {
-		.flags = O_PATH,
-		.resolve = resolve,
-	};
-
-	if (!openat2_supported) {
-		how.resolve = 0;
-		ksft_print_msg("openat2(2) unsupported -- using openat(2) instead\n");
-	}
-
-	dfd = setup_testdir();
-	afd = openat(dfd, "a", O_PATH);
-	if (afd < 0)
-		ksft_exit_fail_msg("test_rename_attack: failed to open 'a'\n");
-
-	child = spawn_attack(dfd, "a/c", "b");
-
-	for (int i = 0; i < ROUNDS; i++) {
-		int fd;
-		char *victim_path = "c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../../c/../..";
-
-		if (openat2_supported)
-			fd = sys_openat2(afd, victim_path, &how);
-		else
-			fd = sys_openat(afd, victim_path, &how);
-
-		if (fd < 0) {
-			if (fd == -EAGAIN)
-				eagains++;
-			else if (fd == -EXDEV)
-				exdevs++;
-			else if (fd == -ENOENT)
-				escapes++; /* escaped outside and got ENOENT... */
-			else
-				other_errs++; /* unexpected error */
-		} else {
-			if (fdequal(fd, afd, NULL))
-				successes++;
-			else
-				escapes++; /* we got an unexpected fd */
-		}
-		close(fd);
-	}
-
-	if (escapes > 0)
-		resultfn = ksft_test_result_fail;
-	ksft_print_msg("non-escapes: EAGAIN=%d EXDEV=%d E<other>=%d success=%d\n",
-		       eagains, exdevs, other_errs, successes);
-	resultfn("rename attack with %s (%d runs, got %d escapes)\n",
-		 flagname(resolve), ROUNDS, escapes);
-
-	/* Should be killed anyway, but might as well make sure. */
-	E_kill(child, SIGKILL);
-}
-
-#define NUM_TESTS NUM_RENAME_TESTS
-
-int main(int argc, char **argv)
-{
-	ksft_print_header();
-	ksft_set_plan(NUM_TESTS);
-
-	test_rename_attack(RESOLVE_BENEATH);
-	test_rename_attack(RESOLVE_IN_ROOT);
-
-	if (ksft_get_fail_cnt() + ksft_get_error_cnt() > 0)
-		ksft_exit_fail();
-	else
-		ksft_exit_pass();
-}