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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-10-23 23:25:57 -0400
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2016-10-23 23:25:57 -0400
commit60f17f75d10638975ee05bda11cb02ee8b5cbf10 (patch)
tree037fe2f986c45833ac4da557f9b327f494a7c8e6 /test/TEST-13-NSPAWN-SMOKE/has-overflow.c
parent4e5a239fb86149ff8f370dbe99430e3244bfad44 (diff)
parent844da987ef8b8c98f837d3328eeb3ed481f43835 (diff)
Merge pull request #4372 from evverx/fix-synced-cgroup-hierarchy-perms
Diffstat (limited to 'test/TEST-13-NSPAWN-SMOKE/has-overflow.c')
-rw-r--r--test/TEST-13-NSPAWN-SMOKE/has-overflow.c143
1 files changed, 0 insertions, 143 deletions
diff --git a/test/TEST-13-NSPAWN-SMOKE/has-overflow.c b/test/TEST-13-NSPAWN-SMOKE/has-overflow.c
deleted file mode 100644
index 1b3331fad7..0000000000
--- a/test/TEST-13-NSPAWN-SMOKE/has-overflow.c
+++ /dev/null
@@ -1,143 +0,0 @@
-#define _GNU_SOURCE
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#include <sched.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/wait.h>
-#include <signal.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <limits.h>
-#include <errno.h>
-#include <grp.h>
-
-#define errExit(msg) do { perror(msg); exit(EXIT_FAILURE); } while (0)
-
-struct child_args {
- int pipe_fd[2]; /* Pipe used to synchronize parent and child */
-};
-
-static void usage(char *pname) {
- fprintf(stderr, "Options can be:\n");
- fprintf(stderr, "\t-M uid_map Specify UID map for user namespace\n");
- fprintf(stderr, "\t-G gid_map Specify GID map for user namespace\n");
-
- exit(EXIT_FAILURE);
-}
-
-static void update_map(char *mapping, char *map_file) {
- int fd, j;
- size_t map_len;
-
- map_len = strlen(mapping);
-
- fd = open(map_file, O_RDWR);
- if (fd == -1) {
- fprintf(stderr, "ERROR: open %s: %s\n", map_file, strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- if (write(fd, mapping, map_len) != map_len) {
- fprintf(stderr, "ERROR: write %s: %s\n", map_file, strerror(errno));
- exit(EXIT_FAILURE);
- }
-
- close(fd);
-}
-
-static void proc_setgroups_write(pid_t child_pid, char *str) {
- char setgroups_path[PATH_MAX];
- int fd;
-
- snprintf(setgroups_path, PATH_MAX, "/proc/%ld/setgroups", (long) child_pid);
-
- fd = open(setgroups_path, O_RDWR);
- if (fd == -1) {
- if (errno != ENOENT)
- fprintf(stderr, "ERROR: open %s: %s\n", setgroups_path, strerror(errno));
- return;
- }
-
- if (write(fd, str, strlen(str)) == -1)
- fprintf(stderr, "ERROR: write %s: %s\n", setgroups_path, strerror(errno));
-
- close(fd);
-}
-
-static int child_func(void *arg) {
- struct child_args *args = (struct child_args *) arg;
- char ch;
-
- close(args->pipe_fd[1]);
- if (read(args->pipe_fd[0], &ch, 1) != 0) {
- fprintf(stderr, "Failure in child: read from pipe returned != 0\n");
- exit(EXIT_FAILURE);
- }
-
- mount("tmpfs", "/tmp", "tmpfs", MS_MGC_VAL, "mode=777,uid=0,gid=0");
- if (mkdir("/tmp/hey", 0777) < 0)
- exit(EXIT_FAILURE);
-
- exit(EXIT_SUCCESS);
-}
-
-#define STACK_SIZE (1024 * 1024)
-
-static char child_stack[STACK_SIZE];
-
-int main(int argc, char *argv[]) {
- int flags, opt;
- pid_t child_pid;
- struct child_args args;
- char *uid_map, *gid_map;
- const int MAP_BUF_SIZE = 100;
- char map_buf[MAP_BUF_SIZE];
- char map_path[PATH_MAX];
- int status;
-
- flags = 0;
- gid_map = NULL;
- uid_map = NULL;
- while ((opt = getopt(argc, argv, "+M:G:")) != -1) {
- switch (opt) {
- case 'M':
- uid_map = optarg;
- break;
- case 'G':
- gid_map = optarg;
- break;
- default:
- usage(argv[0]);
- }
- }
-
- if (!uid_map || !gid_map)
- usage(argv[0]);
-
- flags |= CLONE_NEWNS;
- flags |= CLONE_NEWUSER;
-
- if (pipe(args.pipe_fd) == -1)
- errExit("pipe");
-
- child_pid = clone(child_func, child_stack + STACK_SIZE, flags | SIGCHLD, &args);
- if (child_pid == -1)
- errExit("clone");
-
- snprintf(map_path, PATH_MAX, "/proc/%ld/uid_map", (long) child_pid);
- update_map(uid_map, map_path);
-
- proc_setgroups_write(child_pid, "allow");
- snprintf(map_path, PATH_MAX, "/proc/%ld/gid_map", (long) child_pid);
- update_map(gid_map, map_path);
-
- close(args.pipe_fd[1]);
-
- if (waitpid(child_pid, &status, 0) == -1)
- errExit("waitpid");
-
- exit(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS ? EXIT_FAILURE : EXIT_SUCCESS);
-}