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#define _GNU_SOURCE
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/types.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syscall.h>
#include <sys/wait.h>
#include "../kselftest.h"
#include "../kselftest_harness.h"
#include "../pidfd/pidfd.h"
/*
* Regression test for:
* 35f71bc0a09a ("fork: report pid reservation failure properly")
* b26ebfe12f34 ("pid: Fix error return value in some cases")
*/
TEST(regression_enomem)
{
pid_t pid;
if (geteuid())
EXPECT_EQ(0, unshare(CLONE_NEWUSER));
EXPECT_EQ(0, unshare(CLONE_NEWPID));
pid = fork();
ASSERT_GE(pid, 0);
if (pid == 0)
exit(EXIT_SUCCESS);
EXPECT_EQ(0, wait_for_pid(pid));
pid = fork();
ASSERT_LT(pid, 0);
ASSERT_EQ(errno, ENOMEM);
}
TEST_HARNESS_MAIN
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