164 lines
3.8 KiB
C
164 lines
3.8 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd., 2015
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version. This program is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details. You should have received a copy of the GNU
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* General Public License along with this program.
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*/
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/*
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* Verify that:
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* When a process with non-zero user IDs performs an execve(), the process's
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* capability sets are cleared.
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* When a process with zero user IDs performs an execve(), the process's
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* capability sets are set.
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*
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*/
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#define _GNU_SOURCE
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#include <sys/wait.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include "libclone.h"
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#include "test.h"
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#include "config.h"
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#include "userns_helper.h"
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#define CHILD1UID 0
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#define CHILD1GID 0
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#define CHILD2UID 200
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#define CHILD2GID 200
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char *TCID = "user_namespace6";
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int TST_TOTAL = 1;
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static int cpid1, parentuid, parentgid;
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/*
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* child_fn1() - Inside a new user namespace
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*/
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static int child_fn1(void)
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{
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int exit_val = 0;
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char *const args[] = { "userns06_capcheck", "privileged", NULL };
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TST_SAFE_CHECKPOINT_WAIT(NULL, 0);
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if (execve(args[0], args, NULL) == -1) {
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printf("execvp unexpected error: (%d) %s\n",
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errno, strerror(errno));
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exit_val = 1;
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}
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return exit_val;
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}
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/*
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* child_fn2() - Inside a new user namespace
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*/
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static int child_fn2(void)
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{
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int exit_val = 0;
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int uid, gid;
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char *const args[] = { "userns06_capcheck", "unprivileged", NULL };
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TST_SAFE_CHECKPOINT_WAIT(NULL, 1);
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uid = geteuid();
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gid = getegid();
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if (uid != CHILD2UID || gid != CHILD2GID) {
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printf("unexpected uid=%d gid=%d\n", uid, gid);
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exit_val = 1;
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}
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if (execve(args[0], args, NULL) == -1) {
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printf("execvp unexpected error: (%d) %s\n",
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errno, strerror(errno));
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exit_val = 1;
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}
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return exit_val;
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}
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static void cleanup(void)
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{
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tst_rmdir();
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}
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static void setup(void)
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{
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check_newuser();
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tst_tmpdir();
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TST_CHECKPOINT_INIT(NULL);
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TST_RESOURCE_COPY(cleanup, "userns06_capcheck", NULL);
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}
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int main(int argc, char *argv[])
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{
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pid_t cpid2;
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char path[BUFSIZ];
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int lc;
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int fd;
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tst_parse_opts(argc, argv, NULL, NULL);
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#ifndef HAVE_LIBCAP
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tst_brkm(TCONF, NULL, "System is missing libcap.");
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#endif
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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parentuid = geteuid();
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parentgid = getegid();
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cpid1 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
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(void *)child_fn1, NULL);
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if (cpid1 < 0)
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tst_brkm(TBROK | TERRNO, cleanup,
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"cpid1 clone failed");
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cpid2 = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD,
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(void *)child_fn2, NULL);
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if (cpid2 < 0)
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tst_brkm(TBROK | TERRNO, cleanup,
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"cpid2 clone failed");
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if (access("/proc/self/setgroups", F_OK) == 0) {
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sprintf(path, "/proc/%d/setgroups", cpid1);
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fd = SAFE_OPEN(cleanup, path, O_WRONLY, 0644);
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SAFE_WRITE(cleanup, 1, fd, "deny", 4);
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SAFE_CLOSE(cleanup, fd);
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sprintf(path, "/proc/%d/setgroups", cpid2);
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fd = SAFE_OPEN(cleanup, path, O_WRONLY, 0644);
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SAFE_WRITE(cleanup, 1, fd, "deny", 4);
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SAFE_CLOSE(cleanup, fd);
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}
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updatemap(cpid1, UID_MAP, CHILD1UID, parentuid, cleanup);
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updatemap(cpid2, UID_MAP, CHILD2UID, parentuid, cleanup);
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updatemap(cpid1, GID_MAP, CHILD1GID, parentgid, cleanup);
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updatemap(cpid2, GID_MAP, CHILD2GID, parentgid, cleanup);
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TST_SAFE_CHECKPOINT_WAKE(cleanup, 0);
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TST_SAFE_CHECKPOINT_WAKE(cleanup, 1);
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tst_record_childstatus(cleanup, cpid1);
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tst_record_childstatus(cleanup, cpid2);
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}
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cleanup();
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tst_exit();
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}
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