2 * Copyright (c) 2001 The FreeBSD Project
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include "opt_compat.h"
31 #include "opt_kdtrace.h"
33 #include <sys/fcntl.h>
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/mutex.h>
42 #include <sys/syscallsubr.h>
43 #include <sys/sysproto.h>
44 #include <sys/systm.h>
47 #include <machine/../linux32/linux.h>
48 #include <machine/../linux32/linux32_proto.h>
50 #include <machine/../linux/linux.h>
51 #include <machine/../linux/linux_proto.h>
54 #include <compat/linux/linux_dtrace.h>
55 #include <compat/linux/linux_util.h>
58 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
61 * DTrace probes in this module.
63 LIN_SDT_PROBE_DEFINE3(uid16, linux_chown16, entry, "char *", "l_uid16_t",
65 LIN_SDT_PROBE_DEFINE1(uid16, linux_chown16, conv_path, "char *");
66 LIN_SDT_PROBE_DEFINE1(uid16, linux_chown16, return, "int");
67 LIN_SDT_PROBE_DEFINE3(uid16, linux_lchown16, entry, "char *", "l_uid16_t",
69 LIN_SDT_PROBE_DEFINE1(uid16, linux_lchown16, conv_path, "char *");
70 LIN_SDT_PROBE_DEFINE1(uid16, linux_lchown16, return, "int");
71 LIN_SDT_PROBE_DEFINE2(uid16, linux_setgroups16, entry, "l_uint", "l_gid16_t *");
72 LIN_SDT_PROBE_DEFINE1(uid16, linux_setgroups16, copyin_error, "int");
73 LIN_SDT_PROBE_DEFINE1(uid16, linux_setgroups16, priv_check_cred_error, "int");
74 LIN_SDT_PROBE_DEFINE1(uid16, linux_setgroups16, return, "int");
75 LIN_SDT_PROBE_DEFINE2(uid16, linux_getgroups16, entry, "l_uint", "l_gid16_t *");
76 LIN_SDT_PROBE_DEFINE1(uid16, linux_getgroups16, copyout_error, "int");
77 LIN_SDT_PROBE_DEFINE1(uid16, linux_getgroups16, return, "int");
78 LIN_SDT_PROBE_DEFINE0(uid16, linux_getgid16, entry);
79 LIN_SDT_PROBE_DEFINE1(uid16, linux_getgid16, return, "int");
80 LIN_SDT_PROBE_DEFINE0(uid16, linux_getuid16, entry);
81 LIN_SDT_PROBE_DEFINE1(uid16, linux_getuid16, return, "int");
82 LIN_SDT_PROBE_DEFINE0(uid16, linux_getegid16, entry);
83 LIN_SDT_PROBE_DEFINE1(uid16, linux_getegid16, return, "int");
84 LIN_SDT_PROBE_DEFINE0(uid16, linux_geteuid16, entry);
85 LIN_SDT_PROBE_DEFINE1(uid16, linux_geteuid16, return, "int");
86 LIN_SDT_PROBE_DEFINE1(uid16, linux_setgid16, entry, "l_gid16_t");
87 LIN_SDT_PROBE_DEFINE1(uid16, linux_setgid16, return, "int");
88 LIN_SDT_PROBE_DEFINE1(uid16, linux_setuid16, entry, "l_uid16_t");
89 LIN_SDT_PROBE_DEFINE1(uid16, linux_setuid16, return, "int");
90 LIN_SDT_PROBE_DEFINE2(uid16, linux_setregid16, entry, "l_gid16_t", "l_gid16_t");
91 LIN_SDT_PROBE_DEFINE1(uid16, linux_setregid16, return, "int");
92 LIN_SDT_PROBE_DEFINE2(uid16, linux_setreuid16, entry, "l_uid16_t", "l_uid16_t");
93 LIN_SDT_PROBE_DEFINE1(uid16, linux_setreuid16, return, "int");
94 LIN_SDT_PROBE_DEFINE3(uid16, linux_setresgid16, entry, "l_gid16_t", "l_gid16_t",
96 LIN_SDT_PROBE_DEFINE1(uid16, linux_setresgid16, return, "int");
97 LIN_SDT_PROBE_DEFINE3(uid16, linux_setresuid16, entry, "l_uid16_t", "l_uid16_t",
99 LIN_SDT_PROBE_DEFINE1(uid16, linux_setresuid16, return, "int");
106 #define CAST_NOCHG(x) ((x == 0xFFFF) ? -1 : x)
109 linux_chown16(struct thread *td, struct linux_chown16_args *args)
114 LCONVPATHEXIST(td, args->path, &path);
117 * The DTrace probes have to be after the LCONVPATHEXIST, as
118 * LCONVPATHEXIST may return on its own and we do not want to
119 * have a stray entry without the corresponding return.
121 LIN_SDT_PROBE3(uid16, linux_chown16, entry, args->path, args->uid,
123 LIN_SDT_PROBE1(uid16, linux_chown16, conv_path, path);
125 error = kern_chown(td, path, UIO_SYSSPACE, CAST_NOCHG(args->uid),
126 CAST_NOCHG(args->gid));
129 LIN_SDT_PROBE1(uid16, linux_chown16, return, error);
134 linux_lchown16(struct thread *td, struct linux_lchown16_args *args)
139 LCONVPATHEXIST(td, args->path, &path);
142 * The DTrace probes have to be after the LCONVPATHEXIST, as
143 * LCONVPATHEXIST may return on its own and we do not want to
144 * have a stray entry without the corresponding return.
146 LIN_SDT_PROBE3(uid16, linux_lchown16, entry, args->path, args->uid,
148 LIN_SDT_PROBE1(uid16, linux_lchown16, conv_path, path);
150 error = kern_lchown(td, path, UIO_SYSSPACE, CAST_NOCHG(args->uid),
151 CAST_NOCHG(args->gid));
154 LIN_SDT_PROBE1(uid16, linux_lchown16, return, error);
159 linux_setgroups16(struct thread *td, struct linux_setgroups16_args *args)
161 struct ucred *newcred, *oldcred;
162 l_gid16_t *linux_gidset;
167 LIN_SDT_PROBE2(uid16, linux_setgroups16, entry, args->gidsetsize,
170 ngrp = args->gidsetsize;
171 if (ngrp < 0 || ngrp >= ngroups_max + 1) {
172 LIN_SDT_PROBE1(uid16, linux_setgroups16, return, EINVAL);
175 linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
176 error = copyin(args->gidset, linux_gidset, ngrp * sizeof(l_gid16_t));
178 LIN_SDT_PROBE1(uid16, linux_setgroups16, copyin_error, error);
179 LIN_SDT_PROBE1(uid16, linux_setgroups16, return, error);
180 free(linux_gidset, M_TEMP);
186 oldcred = crcopysafe(p, newcred);
189 * cr_groups[0] holds egid. Setting the whole set from
190 * the supplied set will cause egid to be changed too.
191 * Keep cr_groups[0] unchanged to prevent that.
194 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
198 LIN_SDT_PROBE1(uid16, linux_setgroups16, priv_check_cred_error,
204 newcred->cr_ngroups = ngrp + 1;
206 bsd_gidset = newcred->cr_groups;
209 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
214 newcred->cr_ngroups = 1;
216 setsugid(td->td_proc);
217 p->p_ucred = newcred;
222 free(linux_gidset, M_TEMP);
224 LIN_SDT_PROBE1(uid16, linux_setgroups16, return, error);
229 linux_getgroups16(struct thread *td, struct linux_getgroups16_args *args)
232 l_gid16_t *linux_gidset;
234 int bsd_gidsetsz, ngrp, error;
236 LIN_SDT_PROBE2(uid16, linux_getgroups16, entry, args->gidsetsize,
240 bsd_gidset = cred->cr_groups;
241 bsd_gidsetsz = cred->cr_ngroups - 1;
244 * cr_groups[0] holds egid. Returning the whole set
245 * here will cause a duplicate. Exclude cr_groups[0]
249 if ((ngrp = args->gidsetsize) == 0) {
250 td->td_retval[0] = bsd_gidsetsz;
252 LIN_SDT_PROBE1(uid16, linux_getgroups16, return, 0);
256 if (ngrp < bsd_gidsetsz) {
257 LIN_SDT_PROBE1(uid16, linux_getgroups16, return, EINVAL);
262 linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
264 while (ngrp < bsd_gidsetsz) {
265 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
269 error = copyout(linux_gidset, args->gidset, ngrp * sizeof(l_gid16_t));
270 free(linux_gidset, M_TEMP);
272 LIN_SDT_PROBE1(uid16, linux_getgroups16, copyout_error, error);
273 LIN_SDT_PROBE1(uid16, linux_getgroups16, return, error);
277 td->td_retval[0] = ngrp;
279 LIN_SDT_PROBE1(uid16, linux_getgroups16, return, 0);
284 * The FreeBSD native getgid(2) and getuid(2) also modify td->td_retval[1]
285 * when COMPAT_43 is defined. This clobbers registers that are assumed to
286 * be preserved. The following lightweight syscalls fixes this. See also
287 * linux_getpid(2), linux_getgid(2) and linux_getuid(2) in linux_misc.c
289 * linux_getgid16() - MP SAFE
290 * linux_getuid16() - MP SAFE
294 linux_getgid16(struct thread *td, struct linux_getgid16_args *args)
297 LIN_SDT_PROBE0(uid16, linux_getgid16, entry);
299 td->td_retval[0] = td->td_ucred->cr_rgid;
301 LIN_SDT_PROBE1(uid16, linux_getgid16, return, 0);
306 linux_getuid16(struct thread *td, struct linux_getuid16_args *args)
309 LIN_SDT_PROBE0(uid16, linux_getuid16, entry);
311 td->td_retval[0] = td->td_ucred->cr_ruid;
313 LIN_SDT_PROBE1(uid16, linux_getuid16, return, 0);
318 linux_getegid16(struct thread *td, struct linux_getegid16_args *args)
320 struct getegid_args bsd;
323 LIN_SDT_PROBE0(uid16, linux_getegid16, entry);
325 error = sys_getegid(td, &bsd);
327 LIN_SDT_PROBE1(uid16, linux_getegid16, return, error);
332 linux_geteuid16(struct thread *td, struct linux_geteuid16_args *args)
334 struct geteuid_args bsd;
337 LIN_SDT_PROBE0(uid16, linux_geteuid16, entry);
339 error = sys_geteuid(td, &bsd);
341 LIN_SDT_PROBE1(uid16, linux_geteuid16, return, error);
346 linux_setgid16(struct thread *td, struct linux_setgid16_args *args)
348 struct setgid_args bsd;
351 LIN_SDT_PROBE1(uid16, linux_setgid16, entry, args->gid);
354 error = sys_setgid(td, &bsd);
356 LIN_SDT_PROBE1(uid16, linux_setgid16, return, error);
361 linux_setuid16(struct thread *td, struct linux_setuid16_args *args)
363 struct setuid_args bsd;
366 LIN_SDT_PROBE1(uid16, linux_setuid16, entry, args->uid);
369 error = sys_setuid(td, &bsd);
371 LIN_SDT_PROBE1(uid16, linux_setuid16, return, error);
376 linux_setregid16(struct thread *td, struct linux_setregid16_args *args)
378 struct setregid_args bsd;
381 LIN_SDT_PROBE2(uid16, linux_setregid16, entry, args->rgid, args->egid);
383 bsd.rgid = CAST_NOCHG(args->rgid);
384 bsd.egid = CAST_NOCHG(args->egid);
385 error = sys_setregid(td, &bsd);
387 LIN_SDT_PROBE1(uid16, linux_setregid16, return, error);
392 linux_setreuid16(struct thread *td, struct linux_setreuid16_args *args)
394 struct setreuid_args bsd;
397 LIN_SDT_PROBE2(uid16, linux_setreuid16, entry, args->ruid, args->euid);
399 bsd.ruid = CAST_NOCHG(args->ruid);
400 bsd.euid = CAST_NOCHG(args->euid);
401 error = sys_setreuid(td, &bsd);
403 LIN_SDT_PROBE1(uid16, linux_setreuid16, return, error);
408 linux_setresgid16(struct thread *td, struct linux_setresgid16_args *args)
410 struct setresgid_args bsd;
413 LIN_SDT_PROBE3(uid16, linux_setresgid16, entry, args->rgid, args->egid,
416 bsd.rgid = CAST_NOCHG(args->rgid);
417 bsd.egid = CAST_NOCHG(args->egid);
418 bsd.sgid = CAST_NOCHG(args->sgid);
419 error = sys_setresgid(td, &bsd);
421 LIN_SDT_PROBE1(uid16, linux_setresgid16, return, error);
426 linux_setresuid16(struct thread *td, struct linux_setresuid16_args *args)
428 struct setresuid_args bsd;
431 LIN_SDT_PROBE3(uid16, linux_setresuid16, entry, args->ruid, args->euid,
434 bsd.ruid = CAST_NOCHG(args->ruid);
435 bsd.euid = CAST_NOCHG(args->euid);
436 bsd.suid = CAST_NOCHG(args->suid);
437 error = sys_setresuid(td, &bsd);
439 LIN_SDT_PROBE1(uid16, linux_setresuid16, return, error);