1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) International Business Machines Corp., 2003.
4 * Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com>
5 */
6
7 /*\
8 * [Description]
9 *
10 * Test for a libc bug where exiting child function by returning from
11 * it caused SIGSEGV.
12 */
13
14 #include <sched.h>
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include "tst_test.h"
18 #include "lapi/syscalls.h"
19 #include "clone_platform.h"
20
21 static void *child_stack;
22
do_child(void * arg LTP_ATTRIBUTE_UNUSED)23 static int do_child(void *arg LTP_ATTRIBUTE_UNUSED)
24 {
25 return 0;
26 }
27
verify_clone(void)28 static void verify_clone(void)
29 {
30 int status;
31 pid_t pid = 0;
32
33 TST_EXP_PID_SILENT(ltp_clone(SIGCHLD, do_child, NULL, CHILD_STACK_SIZE,
34 child_stack));
35
36 if (!TST_PASS)
37 return;
38
39 SAFE_WAITPID(pid, &status, 0);
40
41 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
42 tst_res(TPASS, "Using return in child will not cause abnormal exit");
43 return;
44 }
45
46 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV) {
47 tst_res(TFAIL, "Use of return in child caused SIGSEGV");
48 return;
49 }
50
51 tst_res(TFAIL, "Using return 0 in child the child %s", tst_strstatus(status));
52 }
53
54 static struct tst_test test = {
55 .test_all = verify_clone,
56 .bufs = (struct tst_buffers []) {
57 {&child_stack, .size = CHILD_STACK_SIZE},
58 {},
59 },
60 };
61