95 lines
2.6 KiB
Bash
Executable File
95 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2019 Dell EMC Isilon
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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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# Reported by syzkaller.
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# "panic: vm_page_free_prep: page 0x61e5968 has unexpected ref_count ." seen
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# Fixed by r352748
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# Test scenario by: Mark Johnston <markj@freebsd.org>
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cat > /tmp/fexecve.c <<EOF
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <err.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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int
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main(int argc __unused, char **argv)
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{
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char template[PATH_MAX];
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void *addr;
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size_t sz;
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int fd;
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sz = 16 * 4096;
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(void)snprintf(template, sizeof(template), "fexecve.XXXXXX");
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fd = mkstemp(template);
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if (fd < 0)
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err(1, "mkstemp");
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if (fchmod(fd, 0700) < 0)
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err(1, "fchmod");
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if (ftruncate(fd, sz) < 0)
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err(1, "ftruncate");
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addr = mmap(NULL, sz, PROT_MAX(PROT_READ) | PROT_READ, MAP_SHARED,
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fd, 0);
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if (addr == MAP_FAILED)
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err(1, "mmap");
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if (mlock(addr, sz) != 0)
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err(1, "mlock");
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if (ftruncate(fd, 0) != 0)
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err(1, "ftruncate");
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if (ftruncate(fd, sz) != 0)
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err(1, "ftruncate");
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(void)close(fd);
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fd = open(template, O_EXEC);
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if (fd < 0)
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err(1, "open");
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fexecve(fd, argv, NULL);
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err(1, "fexecve");
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return (0);
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}
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EOF
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cc -o /tmp/fexecve -Wall -Wextra -O2 /tmp/fexecve.c || exit 1
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echo "Expect: fexecve: fexecve: Input/output error"
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(cd /tmp; /tmp/fexecve)
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rm -f /tmp/fexecve /tmp/fexecve.c /tmp/fexecve.??????
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