Re: [LTP] [PATCH] containers: new testcase userns07

[Yuan Sun <sunyuan3@huawei.com>]

Thank you, Jan.

On 2015/9/8 15:48, Jan Stancek wrote:
>
> ----- Original Message -----
>> From: "Yuan Sun" <sunyuan3@huawei.com>
>> To: jstancek@redhat.com
>> Cc: ltp-list@lists.sourceforge.net
>> Sent: Thursday, 20 August, 2015 9:20:53 AM
>> Subject: [PATCH] containers: new testcase userns07
>>
>> Signed-off-by: Yuan Sun <sunyuan3@huawei.com>
> Hi,
>
> pushed with couple small changes (see comments below).
>
> Regards,
> Jan
>
>> ---
>>   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.
>> + */
> Changed to ".. of at least 32 nested levels ...".
>
>> +
>> +#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);
> updatemap in child process shouldn't call 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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