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8920c5f2a1
Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D41320 MFC after: 2 weeks
48 lines
931 B
C
48 lines
931 B
C
/*-
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* Copyright (c) 2023 Dmitry Chagin <dchagin@FreeBSD.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* PR: 272585
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* Test provided by John F. Carr
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*/
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#include <sys/systm.h>
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#include <sys/mman.h>
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#include <vm/vm_param.h>
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#include <atf-c.h>
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#include <unistd.h>
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ATF_TC_WITHOUT_HEAD(mprotect_exec_test);
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ATF_TC_BODY(mprotect_exec_test, tc)
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{
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long pagesize;
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char *addr, *guard;
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size_t alloc_size;
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pagesize = sysconf(_SC_PAGESIZE);
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ATF_REQUIRE(pagesize > 0);
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alloc_size = SGROWSIZ * 2;
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addr = mmap(NULL, alloc_size, PROT_READ | PROT_WRITE,
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MAP_STACK | MAP_PRIVATE | MAP_ANON, -1, 0);
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ATF_REQUIRE(addr != MAP_FAILED);
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/*
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* Change prot of the last page in the mmaped stack area.
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*/
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guard = addr + alloc_size - SGROWSIZ;
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ATF_REQUIRE(mprotect(guard, pagesize, PROT_NONE) == 0);
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((volatile char *)guard)[-1];
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, mprotect_exec_test);
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return (atf_no_error());
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}
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