1 /*
2 * Check decoding of kexec_file_load syscall.
3 *
4 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31 #include <asm/unistd.h>
32 #include "scno.h"
33
34 #ifdef __NR_kexec_file_load
35
36 # include <inttypes.h>
37 # include <stdio.h>
38 # include <unistd.h>
39
40 struct strval {
41 kernel_ulong_t val;
42 const char *str64;
43 const char *str32;
44 const char *str;
45 };
46
47 #define CMDLINE_STR "deadcodebaddatadefaced";
48
49 int
main(void)50 main(void)
51 {
52 static const kernel_ulong_t bogus_kernel_fd =
53 (kernel_ulong_t) 0xdeadca57badda7a1ULL;
54 static const kernel_ulong_t bogus_initrd_fd =
55 (kernel_ulong_t) 0xdec0ded1defaced2ULL;
56 static const char cmdline_str[] = CMDLINE_STR;
57 static const char cmdline_short_str[] = "abcdef";
58
59 static const kernel_ulong_t cmdline_lens[] = {
60 0,
61 (kernel_ulong_t) 0xcaffeeeddeadbeefULL,
62 sizeof(cmdline_str),
63 sizeof(cmdline_str) - 1,
64 sizeof(cmdline_short_str),
65 sizeof(cmdline_short_str) - 1,
66 sizeof(cmdline_short_str) + 1,
67 };
68 static const struct strval flags[] = {
69 { (kernel_ulong_t) 0xbadc0dedda7a1058ULL,
70 "0xbadc0ded", "0x",
71 "da7a1058 /* KEXEC_FILE_??? */" },
72 { 0, "", "", "0" },
73 { 0xdeadbeef, "", "", "KEXEC_FILE_UNLOAD|KEXEC_FILE_ON_CRASH|"
74 "KEXEC_FILE_NO_INITRAMFS|0xdeadbee8" },
75 };
76
77
78 long rc;
79 char *cmdline = tail_memdup(cmdline_str, sizeof(cmdline_str));
80 char *cmdline_short =
81 tail_memdup(cmdline_short_str, sizeof(cmdline_short_str));
82 char cmdline_ptr[sizeof("0x") + sizeof(void *) * 2];
83 char cmdline_short_ptr[sizeof("0x") + sizeof(void *) * 2];
84 unsigned int i;
85 unsigned int j;
86
87 struct strval cmdlines[] = {
88 { (uintptr_t) NULL, "", "", "NULL" },
89 { (uintptr_t) (cmdline + sizeof(cmdline_str)), "", "",
90 cmdline_ptr },
91 { (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
92 { (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
93 { (uintptr_t) cmdline_short, "", "", "\"abcdef\\0\"" },
94 { (uintptr_t) cmdline_short, "", "", "\"abcdef\"" },
95 { (uintptr_t) cmdline_short, "", "", cmdline_short_ptr },
96 };
97
98
99 snprintf(cmdline_ptr, sizeof(cmdline_ptr), "%p",
100 cmdline + sizeof(cmdline_str));
101 snprintf(cmdline_short_ptr, sizeof(cmdline_short_ptr), "%p",
102 cmdline_short);
103
104 for (i = 0; i < ARRAY_SIZE(flags); i++) {
105 for (j = 0; j < ARRAY_SIZE(cmdlines); j++) {
106 rc = syscall(__NR_kexec_file_load, bogus_kernel_fd,
107 bogus_initrd_fd, cmdline_lens[j],
108 cmdlines[j].val, flags[i].val);
109 printf("kexec_file_load(%d, %d, %llu, %s, %s%s) = %s\n",
110 (int) bogus_kernel_fd, (int) bogus_initrd_fd,
111 (unsigned long long) cmdline_lens[j],
112 cmdlines[j].str,
113 sizeof(kernel_ulong_t) == 8 ? flags[i].str64 :
114 flags[i].str32, flags[i].str, sprintrc(rc));
115 }
116 }
117
118 puts("+++ exited with 0 +++");
119
120 return 0;
121 }
122
123 #else
124
125 SKIP_MAIN_UNDEFINED("__NR_kexec_file_load");
126
127 #endif
128