exec selftests: test ->recursion_depth (4e7301e6) · Commits · 戴 / test

tools/testing/selftests/exec/.gitignore

+2 −1

Original line number	Diff line number	Diff line
		@@ -6,4 +6,5 @@ execveat.moved
		execveat.path.ephemeral
		execveat.ephemeral
		execveat.denatured
		/recursion-depth
		xxxxxxxx*

tools/testing/selftests/exec/Makefile

+4 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0
		CFLAGS = -Wall
		CFLAGS += -Wno-nonnull
		CFLAGS += -D_GNU_SOURCE

		TEST_GEN_PROGS := execveat
		TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir
		# Makefile is a run-time dependency, since it's accessed by the execveat test
		TEST_FILES := Makefile

		TEST_GEN_PROGS += recursion-depth

		EXTRA_CLEAN := $(OUTPUT)/subdir.moved $(OUTPUT)/execveat.moved $(OUTPUT)/xxxxx*

		include ../lib.mk

tools/testing/selftests/exec/recursion-depth.c

0 → 100644

+67 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2019 Alexey Dobriyan <adobriyan@gmail.com>
		*
		* Permission to use, copy, modify, and distribute this software for any
		* purpose with or without fee is hereby granted, provided that the above
		* copyright notice and this permission notice appear in all copies.
		*
		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
		* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
		* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
		*/
		/* Test that pointing #! script interpreter to self doesn't recurse. */
		#include <errno.h>
		#include <sched.h>
		#include <stdio.h>
		#include <string.h>
		#include <sys/types.h>
		#include <sys/stat.h>
		#include <fcntl.h>
		#include <sys/mount.h>
		#include <unistd.h>

		int main(void)
		{
		if (unshare(CLONE_NEWNS) == -1) {
		if (errno == ENOSYS \|\| errno == EPERM) {
		fprintf(stderr, "error: unshare, errno %d\n", errno);
		return 4;
		}
		fprintf(stderr, "error: unshare, errno %d\n", errno);
		return 1;
		}
		if (mount(NULL, "/", NULL, MS_PRIVATE\|MS_REC, NULL) == -1) {
		fprintf(stderr, "error: mount '/', errno %d\n", errno);
		return 1;
		}
		/* Require "exec" filesystem. */
		if (mount(NULL, "/tmp", "ramfs", 0, NULL) == -1) {
		fprintf(stderr, "error: mount ramfs, errno %d\n", errno);
		return 1;
		}

		#define FILENAME "/tmp/1"

		int fd = creat(FILENAME, 0700);
		if (fd == -1) {
		fprintf(stderr, "error: creat, errno %d\n", errno);
		return 1;
		}
		#define S "#!" FILENAME "\n"
		if (write(fd, S, strlen(S)) != strlen(S)) {
		fprintf(stderr, "error: write, errno %d\n", errno);
		return 1;
		}
		close(fd);

		int rv = execve(FILENAME, NULL, NULL);
		if (rv == -1 && errno == ELOOP) {
		return 0;
		}
		fprintf(stderr, "error: execve, rv %d, errno %d\n", rv, errno);
		return 1;
		}

Admin message