Signed-off-by: Yuan Sun <[email protected]>
---
runtest/containers | 1 +
testcases/kernel/containers/.gitignore | 1 +
testcases/kernel/containers/userns/userns07.c | 133 ++++++++++++++++++++++++++
3 files changed, 135 insertions(+)
create mode 100644 testcases/kernel/containers/userns/userns07.c
diff --git a/runtest/containers b/runtest/containers
index ac37ab2..80de20e 100644
--- a/runtest/containers
+++ b/runtest/containers
@@ -75,3 +75,4 @@ userns03 userns03
userns04 userns04
userns05 userns05
userns06 userns06
+userns07 userns07
diff --git a/testcases/kernel/containers/.gitignore
b/testcases/kernel/containers/.gitignore
index 3f96f42..7dc2608 100644
--- a/testcases/kernel/containers/.gitignore
+++ b/testcases/kernel/containers/.gitignore
@@ -10,3 +10,4 @@ userns/userns04
userns/userns05
userns/userns06_capcheck
userns/userns06
+userns/userns07
diff --git a/testcases/kernel/containers/userns/userns07.c
b/testcases/kernel/containers/userns/userns07.c
new file mode 100644
index 0000000..decabc8
--- /dev/null
+++ b/testcases/kernel/containers/userns/userns07.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) Huawei Technologies Co., Ltd., 2015
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ */
+
+/*
+ * Verify that:
+ * The kernel imposes a limit of 32 nested levels of user namespaces.
+ */
+
+#define _GNU_SOURCE
+#include <sys/wait.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include "test.h"
+#include "userns_helper.h"
+
+#define MAXNEST 32
+
+char *TCID = "userns07";
+int TST_TOTAL = 1;
+
+static void setup(void)
+{
+ check_newuser();
+ tst_tmpdir();
+ TST_CHECKPOINT_INIT(NULL);
+}
+
+static void cleanup(void)
+{
+ tst_rmdir();
+}
+
+static int child_fn1(void *arg)
+{
+ pid_t cpid1;
+ long level = (long)arg;
+ int status;
+ int parentuid;
+ int parentgid;
+
+ TST_SAFE_CHECKPOINT_WAIT(NULL, 0);
+
+ if (level == MAXNEST)
+ return 0;
+ cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
+ (void *)child_fn1, (void *)(level + 1));
+ if (cpid1 < 0) {
+ printf("level %ld:unexpected error: (%d) %s\n",
+ level, errno, strerror(errno));
+ return 1;
+ }
+
+ parentuid = geteuid();
+ parentgid = getegid();
+
+ updatemap(cpid1, UID_MAP, 0, parentuid, cleanup);
+ updatemap(cpid1, GID_MAP, 0, parentgid, cleanup);
+
+ TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
+
+ if (waitpid(cpid1, &status, 0) == -1)
+ return 1;
+
+ if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
+ printf("child exited abnormally\n");
+ return 1;
+ } else if (WIFSIGNALED(status)) {
+ printf("child was killed with signal = %d", WTERMSIG(status));
+ return 1;
+ }
+ return 0;
+}
+
+static void test_max_nest(void)
+{
+ pid_t cpid1;
+ int parentuid;
+ int parentgid;
+ int fd;
+ char path[BUFSIZ];
+
+ cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
+ (void *)child_fn1, (void *)0);
+ if (cpid1 < 0)
+ tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
+
+ parentuid = geteuid();
+ parentgid = getegid();
+
+ if (access("/proc/self/setgroups", F_OK) == 0) {
+ sprintf(path, "/proc/%d/setgroups", cpid1);
+ fd = SAFE_OPEN(cleanup, path, O_WRONLY, 0644);
+ SAFE_WRITE(cleanup, 1, fd, "deny", 4);
+ SAFE_CLOSE(cleanup, fd);
+ }
+
+ updatemap(cpid1, UID_MAP, 0, parentuid, cleanup);
+ updatemap(cpid1, GID_MAP, 0, parentgid, cleanup);
+
+ TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
+ tst_record_childstatus(cleanup, cpid1);
+}
+
+int main(int argc, char *argv[])
+{
+ int lc;
+
+ setup();
+ tst_parse_opts(argc, argv, NULL, NULL);
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ tst_count = 0;
+ test_max_nest();
+ }
+
+ cleanup();
+ tst_exit();
+}
+
--
1.9.1
------------------------------------------------------------------------------
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