1 /*
2 * Copyright (c) 1994-1996 Rick Sladkey <jrs@world.std.com>
3 * Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
4 * Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
5 * Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "defs.h"
32
33 #include <sys/prctl.h>
34
35 #include "xlat/prctl_options.h"
36 #include "xlat/pr_cap_ambient.h"
37 #include "xlat/pr_mce_kill.h"
38 #include "xlat/pr_mce_kill_policy.h"
39 #include "xlat/pr_set_mm.h"
40 #include "xlat/pr_tsc.h"
41 #include "xlat/pr_unalign_flags.h"
42
43 #ifndef TASK_COMM_LEN
44 # define TASK_COMM_LEN 16
45 #endif
46
47 #ifdef HAVE_LINUX_SECCOMP_H
48 # include <linux/seccomp.h>
49 #endif
50 #include "xlat/seccomp_mode.h"
51
52 #ifdef HAVE_LINUX_SECUREBITS_H
53 # include <linux/securebits.h>
54 #endif
55 #include "xlat/secbits.h"
56
57 /* these constants are the same as in <linux/capability.h> */
58 enum {
59 #include "caps0.h"
60 #include "caps1.h"
61 };
62
63 #include "xlat/cap.h"
64
65 static void
print_prctl_args(struct tcb * tcp,const unsigned int first)66 print_prctl_args(struct tcb *tcp, const unsigned int first)
67 {
68 unsigned int i;
69
70 for (i = first; i < tcp->s_ent->nargs; ++i)
71 tprintf(", %#lx", tcp->u_arg[i]);
72 }
73
SYS_FUNC(prctl)74 SYS_FUNC(prctl)
75 {
76 unsigned int i;
77
78 if (entering(tcp))
79 printxval(prctl_options, tcp->u_arg[0], "PR_???");
80
81 switch (tcp->u_arg[0]) {
82 case PR_GET_DUMPABLE:
83 case PR_GET_KEEPCAPS:
84 case PR_GET_SECCOMP:
85 case PR_GET_TIMERSLACK:
86 case PR_GET_TIMING:
87 return RVAL_DECODED;
88
89 case PR_GET_CHILD_SUBREAPER:
90 case PR_GET_ENDIAN:
91 case PR_GET_FPEMU:
92 case PR_GET_FPEXC:
93 if (entering(tcp))
94 tprints(", ");
95 else
96 printnum_int(tcp, tcp->u_arg[1], "%u");
97 break;
98
99 case PR_GET_NAME:
100 if (entering(tcp))
101 tprints(", ");
102 else {
103 if (syserror(tcp))
104 printaddr(tcp->u_arg[1]);
105 else
106 printstr(tcp, tcp->u_arg[1], -1);
107 }
108 break;
109
110 case PR_GET_PDEATHSIG:
111 if (entering(tcp))
112 tprints(", ");
113 else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
114 tprints("[");
115 tprints(signame(i));
116 tprints("]");
117 }
118 break;
119
120 case PR_GET_SECUREBITS:
121 if (entering(tcp))
122 break;
123 if (syserror(tcp) || tcp->u_rval == 0)
124 return 0;
125 tcp->auxstr = sprintflags("", secbits, tcp->u_rval);
126 return RVAL_STR;
127
128 case PR_GET_TID_ADDRESS:
129 if (entering(tcp))
130 tprints(", ");
131 else
132 printnum_ptr(tcp, tcp->u_arg[1]);
133 break;
134
135 case PR_GET_TSC:
136 if (entering(tcp))
137 tprints(", ");
138 else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
139 tprints("[");
140 printxval(pr_tsc, i, "PR_TSC_???");
141 tprints("]");
142 }
143 break;
144
145 case PR_GET_UNALIGN:
146 if (entering(tcp))
147 tprints(", ");
148 else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
149 tprints("[");
150 printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
151 tprints("]");
152 }
153 break;
154
155 /* PR_TASK_PERF_EVENTS_* take no arguments. */
156 case PR_TASK_PERF_EVENTS_DISABLE:
157 case PR_TASK_PERF_EVENTS_ENABLE:
158 return RVAL_DECODED;
159
160 case PR_SET_CHILD_SUBREAPER:
161 case PR_SET_DUMPABLE:
162 case PR_SET_ENDIAN:
163 case PR_SET_FPEMU:
164 case PR_SET_FPEXC:
165 case PR_SET_KEEPCAPS:
166 case PR_SET_TIMING:
167 tprintf(", %lu", tcp->u_arg[1]);
168 return RVAL_DECODED;
169
170 case PR_CAPBSET_DROP:
171 case PR_CAPBSET_READ:
172 tprints(", ");
173 printxval(cap, tcp->u_arg[1], "CAP_???");
174 return RVAL_DECODED;
175
176 case PR_CAP_AMBIENT:
177 tprints(", ");
178 printxval(pr_cap_ambient, tcp->u_arg[1], "PR_CAP_AMBIENT_???");
179 switch (tcp->u_arg[1]) {
180 case PR_CAP_AMBIENT_RAISE:
181 case PR_CAP_AMBIENT_LOWER:
182 case PR_CAP_AMBIENT_IS_SET:
183 tprints(", ");
184 printxval(cap, tcp->u_arg[2], "CAP_???");
185 print_prctl_args(tcp, 3);
186 break;
187 default:
188 print_prctl_args(tcp, 2);
189 break;
190 }
191 return RVAL_DECODED;
192
193 case PR_MCE_KILL:
194 tprints(", ");
195 printxval(pr_mce_kill, tcp->u_arg[1], "PR_MCE_KILL_???");
196 tprints(", ");
197 if (PR_MCE_KILL_SET == tcp->u_arg[1])
198 printxval(pr_mce_kill_policy, tcp->u_arg[2],
199 "PR_MCE_KILL_???");
200 else
201 tprintf("%#lx", tcp->u_arg[2]);
202 print_prctl_args(tcp, 3);
203 return RVAL_DECODED;
204
205 case PR_SET_NAME:
206 tprints(", ");
207 printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN);
208 return RVAL_DECODED;
209
210 #ifdef __ANDROID__
211 # ifndef PR_SET_VMA
212 # define PR_SET_VMA 0x53564d41
213 # endif
214 # ifndef PR_SET_VMA_ANON_NAME
215 # define PR_SET_VMA_ANON_NAME 0
216 # endif
217 case PR_SET_VMA:
218 if (tcp->u_arg[1] == PR_SET_VMA_ANON_NAME) {
219 tprintf(", %lu", tcp->u_arg[1]);
220 tprintf(", %#lx", tcp->u_arg[2]);
221 tprintf(", %lu, ", tcp->u_arg[3]);
222 printstr(tcp, tcp->u_arg[4], -1);
223 } else {
224 /* There are no other sub-options now, but there
225 * might be in future... */
226 print_prctl_args(tcp, 1);
227 }
228 return RVAL_DECODED;
229 #endif
230
231 case PR_SET_MM:
232 tprints(", ");
233 printxval(pr_set_mm, tcp->u_arg[1], "PR_SET_MM_???");
234 print_prctl_args(tcp, 2);
235 return RVAL_DECODED;
236
237 case PR_SET_PDEATHSIG:
238 tprints(", ");
239 if ((unsigned long) tcp->u_arg[1] > 128)
240 tprintf("%lu", tcp->u_arg[1]);
241 else
242 tprints(signame(tcp->u_arg[1]));
243 return RVAL_DECODED;
244
245 case PR_SET_PTRACER:
246 tprints(", ");
247 if (tcp->u_arg[1] == -1)
248 tprints("PR_SET_PTRACER_ANY");
249 else
250 tprintf("%lu", tcp->u_arg[1]);
251 return RVAL_DECODED;
252
253 case PR_SET_SECCOMP:
254 tprints(", ");
255 printxval(seccomp_mode, tcp->u_arg[1],
256 "SECCOMP_MODE_???");
257 if (SECCOMP_MODE_STRICT == tcp->u_arg[1])
258 return RVAL_DECODED;
259 if (SECCOMP_MODE_FILTER == tcp->u_arg[1]) {
260 tprints(", ");
261 print_seccomp_filter(tcp, tcp->u_arg[2]);
262 return RVAL_DECODED;
263 }
264 print_prctl_args(tcp, 2);
265 return RVAL_DECODED;
266
267 case PR_SET_SECUREBITS:
268 tprints(", ");
269 printflags(secbits, tcp->u_arg[1], "SECBIT_???");
270 return RVAL_DECODED;
271
272 case PR_SET_TIMERSLACK:
273 tprintf(", %ld", tcp->u_arg[1]);
274 return RVAL_DECODED;
275
276 case PR_SET_TSC:
277 tprints(", ");
278 printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???");
279 return RVAL_DECODED;
280
281 case PR_SET_UNALIGN:
282 tprints(", ");
283 printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???");
284 return RVAL_DECODED;
285
286 case PR_SET_NO_NEW_PRIVS:
287 case PR_SET_THP_DISABLE:
288 tprintf(", %lu", tcp->u_arg[1]);
289 print_prctl_args(tcp, 2);
290 return RVAL_DECODED;
291
292 case PR_MCE_KILL_GET:
293 if (entering(tcp)) {
294 print_prctl_args(tcp, 1);
295 return 0;
296 }
297 if (syserror(tcp))
298 return 0;
299 tcp->auxstr = xlookup(pr_mce_kill_policy, tcp->u_rval);
300 return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
301
302 case PR_GET_NO_NEW_PRIVS:
303 case PR_GET_THP_DISABLE:
304 case PR_MPX_DISABLE_MANAGEMENT:
305 case PR_MPX_ENABLE_MANAGEMENT:
306 default:
307 print_prctl_args(tcp, 1);
308 return RVAL_DECODED;
309 }
310 return 0;
311 }
312
313 #if defined X86_64 || defined X32
314 # include <asm/prctl.h>
315 # include "xlat/archvals.h"
316
SYS_FUNC(arch_prctl)317 SYS_FUNC(arch_prctl)
318 {
319 if (entering(tcp))
320 printxval(archvals, tcp->u_arg[0], "ARCH_???");
321
322 switch (tcp->u_arg[0]) {
323 case ARCH_GET_GS:
324 case ARCH_GET_FS:
325 if (entering(tcp))
326 tprints(", ");
327 else
328 printnum_ptr(tcp, tcp->u_arg[1]);
329 return 0;
330 }
331
332 tprintf(", %#lx", tcp->u_arg[1]);
333 return RVAL_DECODED;
334 }
335 #endif /* X86_64 || X32 */
336