96 lines
2.7 KiB
Bash
Executable File
96 lines
2.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2014 EMC Corp.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# "panic: vm_map_protect: object 0xca6869c0 overcharged" seen:
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# http://people.freebsd.org/~pho/stress/log/mmap9.txt
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# Fixed in r265843
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# Test scenario by: Mark Johnston markj@
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. ../default.cfg
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/mmap9.c
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# At one point during the fix development, only the thread version would panic
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mycc -o mmap9 -O2 -Wall -Wextra mmap9.c || exit 1
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mycc -o mmap9p -O2 -Wall -Wextra mmap9.c -lpthread || exit 1
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rm -f mmap9.c
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cd $odir
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/tmp/mmap9
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/tmp/mmap9p
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rm -f /tmp/mmap9 /tmp/mmap9p
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exit
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EOF
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <string.h>
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#include <unistd.h>
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int
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main(void)
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{
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size_t sz = 1;
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char *addr;
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/*
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* This is the minimum amount of C code it takes to panic the kernel.
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* This is as submitted and thus not a complete and correct test program.
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*/
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addr = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANON,
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-1, 0);
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if (addr == NULL)
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err(1, "mmap");
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memset(addr, 0, sz);
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if (fork() != 0) {
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if (mlock(addr, sz))
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err(1, "mlock");
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if (mprotect(addr, sz, PROT_READ))
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err(1, "mprotect");
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if (mprotect(addr, sz, PROT_READ | PROT_WRITE))
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err(1, "mprotect");
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if (mprotect(addr, sz, PROT_READ))
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err(1, "mprotect");
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if (mprotect(addr, sz, PROT_READ | PROT_WRITE))
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err(1, "mprotect");
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} else
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/*
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* Ensure that shadow objects aren't collapsed by process exit.
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*/
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sleep(1);
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return (0);
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}
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