1 /*
2 * Check decoding of kexec_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
32 #include <asm/unistd.h>
33
34 #ifdef __NR_kexec_load
35
36 # include <stdio.h>
37 # include <unistd.h>
38
39 struct strval {
40 kernel_ulong_t val;
41 const char *str64;
42 const char *str32;
43 const char *str;
44 };
45
46 struct segm {
47 void *buf;
48 size_t bufsz;
49 void *mem;
50 size_t memsz;
51 };
52
53 int
main(void)54 main(void)
55 {
56 enum {
57 NUM_SEGMS = 17,
58 NUM_SEGMS_UNCUT = 5,
59 NUM_SEGMS_UNCUT_MAX = 9,
60 NUM_SEGMS_CUT = 12,
61 SEGMS_ARRAY_SIZE = sizeof(struct segm) * NUM_SEGMS,
62 };
63
64 static const kernel_ulong_t bogus_zero =
65 sizeof(long) < sizeof(kernel_long_t) ?
66 (kernel_ulong_t) 0xffffffff00000000ULL : 0;
67 static const kernel_ulong_t bogus_entry =
68 (kernel_ulong_t) 0xdeadca57badda7a1ULL;
69 static const kernel_ulong_t bogus_nsegs =
70 (kernel_ulong_t) 0xdec0ded1defaced2ULL;
71
72 static const struct strval flags[] = {
73 { (kernel_ulong_t) 0xbadc0dedda7a1054ULL,
74 "0xda7a0000 /* KEXEC_ARCH_??? */|0xbadc0ded0000",
75 "0xda7a0000 /* KEXEC_ARCH_??? */|0x",
76 "1054 /* KEXEC_??? */" },
77 { 0, "", "", "KEXEC_ARCH_DEFAULT" },
78 { 0x2a0003, "", "",
79 "KEXEC_ARCH_SH|KEXEC_ON_CRASH|KEXEC_PRESERVE_CONTEXT" },
80 { 0xdead0000, "", "", "0xdead0000 /* KEXEC_ARCH_??? */" },
81 };
82
83 const char *errstr;
84 long rc;
85 struct segm *segms = tail_alloc(SEGMS_ARRAY_SIZE);
86 unsigned int i;
87
88 fill_memory(segms, SEGMS_ARRAY_SIZE);
89 segms[0].buf = segms[0].mem = NULL;
90
91 rc = syscall(__NR_kexec_load, bogus_zero, bogus_zero, bogus_zero,
92 flags[0].val);
93 printf("kexec_load(NULL, 0, NULL, %s%s) = %s\n",
94 sizeof(long) == 8 ? flags[0].str64 : flags[0].str32,
95 flags[0].str, sprintrc(rc));
96
97 rc = syscall(__NR_kexec_load, bogus_entry, bogus_nsegs,
98 segms + SEGMS_ARRAY_SIZE, flags[1].val);
99 printf("kexec_load(%#lx, %lu, %p, %s) = %s\n",
100 (unsigned long) bogus_entry, (unsigned long) bogus_nsegs,
101 segms + SEGMS_ARRAY_SIZE, flags[1].str, sprintrc(rc));
102
103 rc = syscall(__NR_kexec_load, bogus_entry, NUM_SEGMS,
104 segms, flags[2].val);
105 printf("kexec_load(%#lx, %lu, %p, %s) = %s\n",
106 (unsigned long) bogus_entry, (unsigned long) NUM_SEGMS,
107 segms, flags[2].str, sprintrc(rc));
108
109 rc = syscall(__NR_kexec_load, bogus_entry, NUM_SEGMS_CUT,
110 segms, flags[3].val);
111 errstr = sprintrc(rc);
112 printf("kexec_load(%#lx, %lu, [{buf=NULL, bufsz=%zu, mem=NULL, "
113 "memsz=%zu}, ",
114 (unsigned long) bogus_entry, (unsigned long) NUM_SEGMS_CUT,
115 segms[0].bufsz, segms[0].memsz);
116 for (i = 1; i < NUM_SEGMS_UNCUT_MAX; i++)
117 printf("{buf=%p, bufsz=%zu, mem=%p, memsz=%zu}, ",
118 segms[i].buf, segms[i].bufsz,
119 segms[i].mem, segms[i].memsz);
120 printf("...], %s) = %s\n", flags[3].str, errstr);
121
122 rc = syscall(__NR_kexec_load, bogus_entry, NUM_SEGMS_CUT,
123 segms + (NUM_SEGMS - NUM_SEGMS_UNCUT_MAX),
124 flags[0].val);
125 errstr = sprintrc(rc);
126 printf("kexec_load(%#lx, %lu, [",
127 (unsigned long) bogus_entry, (unsigned long) NUM_SEGMS_CUT);
128 for (i = NUM_SEGMS - NUM_SEGMS_UNCUT_MAX; i < NUM_SEGMS; i++)
129 printf("{buf=%p, bufsz=%zu, mem=%p, memsz=%zu}, ",
130 segms[i].buf, segms[i].bufsz,
131 segms[i].mem, segms[i].memsz);
132 printf("%p], %s%s) = %s\n",
133 segms + NUM_SEGMS,
134 sizeof(long) == 8 ? flags[0].str64 : flags[0].str32,
135 flags[0].str, errstr);
136
137 rc = syscall(__NR_kexec_load, bogus_entry, NUM_SEGMS_UNCUT,
138 segms + (NUM_SEGMS - NUM_SEGMS_UNCUT),
139 flags[1].val);
140 errstr = sprintrc(rc);
141 printf("kexec_load(%#lx, %lu, [",
142 (unsigned long) bogus_entry, (unsigned long) NUM_SEGMS_UNCUT);
143 for (i = NUM_SEGMS - NUM_SEGMS_UNCUT; i < NUM_SEGMS; i++)
144 printf("{buf=%p, bufsz=%zu, mem=%p, memsz=%zu}%s",
145 segms[i].buf, segms[i].bufsz,
146 segms[i].mem, segms[i].memsz,
147 (i == NUM_SEGMS - 1) ? "" : ", ");
148 printf("], %s) = %s\n", flags[1].str, errstr);
149
150 rc = syscall(__NR_kexec_load, bogus_entry, NUM_SEGMS_CUT,
151 segms + 1, flags[2].val);
152 errstr = sprintrc(rc);
153 printf("kexec_load(%#lx, %lu, [",
154 (unsigned long) bogus_entry, (unsigned long) NUM_SEGMS_CUT);
155 for (i = 1; i < NUM_SEGMS_UNCUT_MAX + 1; i++)
156 printf("{buf=%p, bufsz=%zu, mem=%p, memsz=%zu}, ",
157 segms[i].buf, segms[i].bufsz,
158 segms[i].mem, segms[i].memsz);
159 printf("...], %s) = %s\n", flags[2].str, errstr);
160
161 puts("+++ exited with 0 +++");
162
163 return 0;
164 }
165
166 #else
167
168 SKIP_MAIN_UNDEFINED("__NR_kexec_load");
169
170 #endif
171