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https://github.com/reactos/syzkaller.git
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78e3ad98f6
Add syz_errno syscall which sets errno to the argument, and add a test with different errno values. This mostly tests the testing infrastructure itself. Add syz_compare syscall which compare two blobs, this can be used for testing of argument memory layout. Implement syz_mmap and fix Makefile to allow building syz-execprog for test OS. Useful for debugging. Update #603
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
// Copyright 2018 syzkaller project authors. All rights reserved.
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// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
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// This file is shared between executor and csource package.
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#include <stdlib.h>
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#include <unistd.h>
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#if SYZ_EXECUTOR || __NR_syz_mmap
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#include <sys/mman.h>
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// syz_mmap(addr vma, len len[addr])
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static long syz_mmap(long a0, long a1)
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{
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return (long)mmap((void*)a0, a1, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0);
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}
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#endif
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#if SYZ_EXECUTOR || __NR_syz_errno
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#include <errno.h>
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// syz_errno(v int32)
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static long syz_errno(long v)
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{
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errno = v;
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return v == 0 ? 0 : -1;
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}
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#endif
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#if SYZ_EXECUTOR || __NR_syz_compare
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#include <errno.h>
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#include <string.h>
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// syz_compare(want ptr[in, string], want_len len[want], got ptr[in, compare_data], got_len len[got])
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static long syz_compare(long want, long want_len, long got, long got_len)
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{
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if (want_len != got_len) {
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debug("syz_compare: want_len=%lu got_len=%lu\n", want_len, got_len);
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errno = EBADF;
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return -1;
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}
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if (memcmp((void*)want, (void*)got, want_len)) {
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debug("syz_compare: data differs\n");
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errno = EINVAL;
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return -1;
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}
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return 0;
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}
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#endif
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#if SYZ_EXECUTOR || SYZ_SANDBOX_NONE
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static void loop();
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static int do_sandbox_none(void)
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{
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loop();
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doexit(0);
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}
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#endif
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#if SYZ_EXECUTOR
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#define do_sandbox_setuid() 0
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#define do_sandbox_namespace() 0
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#endif
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