54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017 Red Hat, Inc. All rights reserved.
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*
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* Attempt to run a trivial binary with stack < 1MB.
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*
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* Early patches for stack guard gap caused that gap size was
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* contributing to stack limit. This caused failures
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* for new processes (E2BIG) when ulimit was set to anything
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* lower than size of gap. commit 1be7107fbe18 "mm: larger
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* stack guard gap, between vmas" sets default gap size to 1M
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* (for systems with 4k pages), so let's set stack limit to 512kB
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* and confirm we can still run some trivial binary.
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*/
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#define _GNU_SOURCE
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include "tst_test.h"
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#define STACK_LIMIT (512 * 1024)
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static void test_setrlimit(void)
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{
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int status;
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struct rlimit rlim;
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pid_t child;
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rlim.rlim_cur = STACK_LIMIT;
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rlim.rlim_max = STACK_LIMIT;
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SAFE_SETRLIMIT(RLIMIT_STACK, &rlim);
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child = SAFE_FORK();
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if (child == 0)
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SAFE_EXECLP("/bin/true", "/bin/true", NULL);
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SAFE_WAITPID(child, &status, 0);
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if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
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tst_res(TPASS, "child process completed OK");
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return;
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}
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tst_res(TFAIL, "child %s", tst_strstatus(status));
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}
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static struct tst_test test = {
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.test_all = test_setrlimit,
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.forks_child = 1,
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.needs_root = 1,
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};
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