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129 lines
4.2 KiB
129 lines
4.2 KiB
4 months ago
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/*
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* Check decoding of kexec_file_load syscall.
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*
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016-2017 The strace developers.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#include "scno.h"
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#ifdef __NR_kexec_file_load
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# include <inttypes.h>
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# include <stdio.h>
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# include <unistd.h>
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struct strval {
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kernel_ulong_t val;
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const char *str64;
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const char *str32;
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const char *str;
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};
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#define CMDLINE_STR "deadcodebaddatadefaced"
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int
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main(void)
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{
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static const kernel_ulong_t bogus_kernel_fd =
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(kernel_ulong_t) 0xdeadca57badda7a1ULL;
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static const kernel_ulong_t bogus_initrd_fd =
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(kernel_ulong_t) 0xdec0ded1defaced2ULL;
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static const char cmdline_str[] = CMDLINE_STR;
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static const char cmdline_short_str[] = "abcdef";
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static const kernel_ulong_t cmdline_lens[] = {
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0,
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(kernel_ulong_t) 0xcaffeeeddeadbeefULL,
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sizeof(cmdline_str),
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sizeof(cmdline_str) - 1,
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sizeof(cmdline_short_str),
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sizeof(cmdline_short_str) - 1,
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sizeof(cmdline_short_str) + 1,
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};
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static const struct strval flags[] = {
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{ (kernel_ulong_t) 0xbadc0dedda7a1058ULL,
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"0xbadc0ded", "0x",
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"da7a1058 /* KEXEC_FILE_??? */" },
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{ 0, "", "", "0" },
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{ 0xdeadbeef, "", "", "KEXEC_FILE_UNLOAD|KEXEC_FILE_ON_CRASH|"
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"KEXEC_FILE_NO_INITRAMFS|0xdeadbee8" },
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};
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long rc;
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char *cmdline = tail_memdup(cmdline_str, sizeof(cmdline_str));
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char *cmdline_short =
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tail_memdup(cmdline_short_str, sizeof(cmdline_short_str));
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char cmdline_ptr[sizeof("0x") + sizeof(void *) * 2];
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char cmdline_short_ptr[sizeof("0x") + sizeof(void *) * 2];
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unsigned int i;
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unsigned int j;
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struct strval cmdlines[] = {
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{ (uintptr_t) NULL, "", "", "NULL" },
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{ (uintptr_t) (cmdline + sizeof(cmdline_str)), "", "",
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cmdline_ptr },
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{ (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
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{ (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
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{ (uintptr_t) cmdline_short, "", "", "\"abcdef\\0\"" },
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{ (uintptr_t) cmdline_short, "", "", "\"abcdef\"" },
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{ (uintptr_t) cmdline_short, "", "", cmdline_short_ptr },
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};
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snprintf(cmdline_ptr, sizeof(cmdline_ptr), "%p",
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cmdline + sizeof(cmdline_str));
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snprintf(cmdline_short_ptr, sizeof(cmdline_short_ptr), "%p",
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cmdline_short);
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for (i = 0; i < ARRAY_SIZE(flags); i++) {
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for (j = 0; j < ARRAY_SIZE(cmdlines); j++) {
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rc = syscall(__NR_kexec_file_load, bogus_kernel_fd,
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bogus_initrd_fd, cmdline_lens[j],
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cmdlines[j].val, flags[i].val);
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printf("kexec_file_load(%d, %d, %llu, %s, %s%s) = %s\n",
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(int) bogus_kernel_fd, (int) bogus_initrd_fd,
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(unsigned long long) cmdline_lens[j],
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cmdlines[j].str,
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sizeof(kernel_ulong_t) == 8 ? flags[i].str64 :
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flags[i].str32, flags[i].str, sprintrc(rc));
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}
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_kexec_file_load");
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#endif
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