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17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/fs.h>
20#include <linux/mm.h>
21#include <linux/file.h>
22#include <linux/signal.h>
23#include <linux/resource.h>
24#include <linux/times.h>
25#include <linux/smp.h>
26#include <linux/sem.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/uio.h>
30#include <linux/quota.h>
31#include <linux/module.h>
32#include <linux/poll.h>
33#include <linux/personality.h>
34#include <linux/stat.h>
35#include <linux/filter.h>
36#include <linux/highmem.h>
37#include <linux/highuid.h>
38#include <linux/mman.h>
39#include <linux/ipv6.h>
40#include <linux/in.h>
41#include <linux/icmpv6.h>
42#include <linux/syscalls.h>
43#include <linux/sysctl.h>
44#include <linux/binfmts.h>
45#include <linux/capability.h>
46#include <linux/compat.h>
47#include <linux/vfs.h>
48#include <linux/ptrace.h>
49#include <linux/fadvise.h>
50#include <linux/ipc.h>
51#include <linux/slab.h>
52
53#include <asm/types.h>
54#include <asm/uaccess.h>
55
56#include <net/scm.h>
57#include <net/sock.h>
58
59#include "compat_linux.h"
60
61u32 psw32_user_bits = PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT |
62 PSW32_DEFAULT_KEY | PSW32_MASK_BASE | PSW32_MASK_MCHECK |
63 PSW32_MASK_PSTATE | PSW32_ASC_HOME;
64
65
66
67#undef high2lowuid
68#undef high2lowgid
69#undef low2highuid
70#undef low2highgid
71#undef SET_UID16
72#undef SET_GID16
73#undef NEW_TO_OLD_UID
74#undef NEW_TO_OLD_GID
75#undef SET_OLDSTAT_UID
76#undef SET_OLDSTAT_GID
77#undef SET_STAT_UID
78#undef SET_STAT_GID
79
80#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
81#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
82#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
83#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
84#define SET_UID16(var, uid) var = high2lowuid(uid)
85#define SET_GID16(var, gid) var = high2lowgid(gid)
86#define NEW_TO_OLD_UID(uid) high2lowuid(uid)
87#define NEW_TO_OLD_GID(gid) high2lowgid(gid)
88#define SET_OLDSTAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
89#define SET_OLDSTAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
90#define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
91#define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
92
93asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group)
94{
95 return sys_chown(filename, low2highuid(user), low2highgid(group));
96}
97
98asmlinkage long sys32_lchown16(const char __user * filename, u16 user, u16 group)
99{
100 return sys_lchown(filename, low2highuid(user), low2highgid(group));
101}
102
103asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
104{
105 return sys_fchown(fd, low2highuid(user), low2highgid(group));
106}
107
108asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
109{
110 return sys_setregid(low2highgid(rgid), low2highgid(egid));
111}
112
113asmlinkage long sys32_setgid16(u16 gid)
114{
115 return sys_setgid((gid_t)gid);
116}
117
118asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
119{
120 return sys_setreuid(low2highuid(ruid), low2highuid(euid));
121}
122
123asmlinkage long sys32_setuid16(u16 uid)
124{
125 return sys_setuid((uid_t)uid);
126}
127
128asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
129{
130 return sys_setresuid(low2highuid(ruid), low2highuid(euid),
131 low2highuid(suid));
132}
133
134asmlinkage long sys32_getresuid16(u16 __user *ruidp, u16 __user *euidp, u16 __user *suidp)
135{
136 const struct cred *cred = current_cred();
137 int retval;
138 u16 ruid, euid, suid;
139
140 ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
141 euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
142 suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
143
144 if (!(retval = put_user(ruid, ruidp)) &&
145 !(retval = put_user(euid, euidp)))
146 retval = put_user(suid, suidp);
147
148 return retval;
149}
150
151asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
152{
153 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
154 low2highgid(sgid));
155}
156
157asmlinkage long sys32_getresgid16(u16 __user *rgidp, u16 __user *egidp, u16 __user *sgidp)
158{
159 const struct cred *cred = current_cred();
160 int retval;
161 u16 rgid, egid, sgid;
162
163 rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
164 egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
165 sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
166
167 if (!(retval = put_user(rgid, rgidp)) &&
168 !(retval = put_user(egid, egidp)))
169 retval = put_user(sgid, sgidp);
170
171 return retval;
172}
173
174asmlinkage long sys32_setfsuid16(u16 uid)
175{
176 return sys_setfsuid((uid_t)uid);
177}
178
179asmlinkage long sys32_setfsgid16(u16 gid)
180{
181 return sys_setfsgid((gid_t)gid);
182}
183
184static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
185{
186 struct user_namespace *user_ns = current_user_ns();
187 int i;
188 u16 group;
189 kgid_t kgid;
190
191 for (i = 0; i < group_info->ngroups; i++) {
192 kgid = GROUP_AT(group_info, i);
193 group = (u16)from_kgid_munged(user_ns, kgid);
194 if (put_user(group, grouplist+i))
195 return -EFAULT;
196 }
197
198 return 0;
199}
200
201static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
202{
203 struct user_namespace *user_ns = current_user_ns();
204 int i;
205 u16 group;
206 kgid_t kgid;
207
208 for (i = 0; i < group_info->ngroups; i++) {
209 if (get_user(group, grouplist+i))
210 return -EFAULT;
211
212 kgid = make_kgid(user_ns, (gid_t)group);
213 if (!gid_valid(kgid))
214 return -EINVAL;
215
216 GROUP_AT(group_info, i) = kgid;
217 }
218
219 return 0;
220}
221
222asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
223{
224 int i;
225
226 if (gidsetsize < 0)
227 return -EINVAL;
228
229 get_group_info(current->cred->group_info);
230 i = current->cred->group_info->ngroups;
231 if (gidsetsize) {
232 if (i > gidsetsize) {
233 i = -EINVAL;
234 goto out;
235 }
236 if (groups16_to_user(grouplist, current->cred->group_info)) {
237 i = -EFAULT;
238 goto out;
239 }
240 }
241out:
242 put_group_info(current->cred->group_info);
243 return i;
244}
245
246asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
247{
248 struct group_info *group_info;
249 int retval;
250
251 if (!capable(CAP_SETGID))
252 return -EPERM;
253 if ((unsigned)gidsetsize > NGROUPS_MAX)
254 return -EINVAL;
255
256 group_info = groups_alloc(gidsetsize);
257 if (!group_info)
258 return -ENOMEM;
259 retval = groups16_from_user(group_info, grouplist);
260 if (retval) {
261 put_group_info(group_info);
262 return retval;
263 }
264
265 retval = set_current_groups(group_info);
266 put_group_info(group_info);
267
268 return retval;
269}
270
271asmlinkage long sys32_getuid16(void)
272{
273 return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
274}
275
276asmlinkage long sys32_geteuid16(void)
277{
278 return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
279}
280
281asmlinkage long sys32_getgid16(void)
282{
283 return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
284}
285
286asmlinkage long sys32_getegid16(void)
287{
288 return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
289}
290
291#ifdef CONFIG_SYSVIPC
292COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
293 unsigned long, third, compat_uptr_t, ptr)
294{
295 if (call >> 16)
296 return -EINVAL;
297 return compat_sys_ipc(call, first, second, third, ptr, third);
298}
299#endif
300
301asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
302{
303 if ((int)high < 0)
304 return -EINVAL;
305 else
306 return sys_truncate(path, (high << 32) | low);
307}
308
309asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
310{
311 if ((int)high < 0)
312 return -EINVAL;
313 else
314 return sys_ftruncate(fd, (high << 32) | low);
315}
316
317asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
318 size_t count, u32 poshi, u32 poslo)
319{
320 if ((compat_ssize_t) count < 0)
321 return -EINVAL;
322 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
323}
324
325asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
326 size_t count, u32 poshi, u32 poslo)
327{
328 if ((compat_ssize_t) count < 0)
329 return -EINVAL;
330 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
331}
332
333asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
334{
335 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
336}
337
338struct stat64_emu31 {
339 unsigned long long st_dev;
340 unsigned int __pad1;
341#define STAT64_HAS_BROKEN_ST_INO 1
342 u32 __st_ino;
343 unsigned int st_mode;
344 unsigned int st_nlink;
345 u32 st_uid;
346 u32 st_gid;
347 unsigned long long st_rdev;
348 unsigned int __pad3;
349 long st_size;
350 u32 st_blksize;
351 unsigned char __pad4[4];
352 u32 __pad5;
353 u32 st_blocks;
354 u32 st_atime;
355 u32 __pad6;
356 u32 st_mtime;
357 u32 __pad7;
358 u32 st_ctime;
359 u32 __pad8;
360 unsigned long st_ino;
361};
362
363static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
364{
365 struct stat64_emu31 tmp;
366
367 memset(&tmp, 0, sizeof(tmp));
368
369 tmp.st_dev = huge_encode_dev(stat->dev);
370 tmp.st_ino = stat->ino;
371 tmp.__st_ino = (u32)stat->ino;
372 tmp.st_mode = stat->mode;
373 tmp.st_nlink = (unsigned int)stat->nlink;
374 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
375 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
376 tmp.st_rdev = huge_encode_dev(stat->rdev);
377 tmp.st_size = stat->size;
378 tmp.st_blksize = (u32)stat->blksize;
379 tmp.st_blocks = (u32)stat->blocks;
380 tmp.st_atime = (u32)stat->atime.tv_sec;
381 tmp.st_mtime = (u32)stat->mtime.tv_sec;
382 tmp.st_ctime = (u32)stat->ctime.tv_sec;
383
384 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
385}
386
387asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
388{
389 struct kstat stat;
390 int ret = vfs_stat(filename, &stat);
391 if (!ret)
392 ret = cp_stat64(statbuf, &stat);
393 return ret;
394}
395
396asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
397{
398 struct kstat stat;
399 int ret = vfs_lstat(filename, &stat);
400 if (!ret)
401 ret = cp_stat64(statbuf, &stat);
402 return ret;
403}
404
405asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
406{
407 struct kstat stat;
408 int ret = vfs_fstat(fd, &stat);
409 if (!ret)
410 ret = cp_stat64(statbuf, &stat);
411 return ret;
412}
413
414asmlinkage long sys32_fstatat64(unsigned int dfd, const char __user *filename,
415 struct stat64_emu31 __user* statbuf, int flag)
416{
417 struct kstat stat;
418 int error;
419
420 error = vfs_fstatat(dfd, filename, &stat, flag);
421 if (error)
422 return error;
423 return cp_stat64(statbuf, &stat);
424}
425
426
427
428
429
430
431
432struct mmap_arg_struct_emu31 {
433 compat_ulong_t addr;
434 compat_ulong_t len;
435 compat_ulong_t prot;
436 compat_ulong_t flags;
437 compat_ulong_t fd;
438 compat_ulong_t offset;
439};
440
441asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
442{
443 struct mmap_arg_struct_emu31 a;
444
445 if (copy_from_user(&a, arg, sizeof(a)))
446 return -EFAULT;
447 if (a.offset & ~PAGE_MASK)
448 return -EINVAL;
449 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
450 a.offset >> PAGE_SHIFT);
451}
452
453asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
454{
455 struct mmap_arg_struct_emu31 a;
456
457 if (copy_from_user(&a, arg, sizeof(a)))
458 return -EFAULT;
459 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
460}
461
462asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
463{
464 if ((compat_ssize_t) count < 0)
465 return -EINVAL;
466
467 return sys_read(fd, buf, count);
468}
469
470asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t count)
471{
472 if ((compat_ssize_t) count < 0)
473 return -EINVAL;
474
475 return sys_write(fd, buf, count);
476}
477
478
479
480
481
482
483
484asmlinkage long
485sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
486{
487 if (advise == 4)
488 advise = POSIX_FADV_DONTNEED;
489 else if (advise == 5)
490 advise = POSIX_FADV_NOREUSE;
491 return sys_fadvise64(fd, offset, len, advise);
492}
493
494struct fadvise64_64_args {
495 int fd;
496 long long offset;
497 long long len;
498 int advice;
499};
500
501asmlinkage long
502sys32_fadvise64_64(struct fadvise64_64_args __user *args)
503{
504 struct fadvise64_64_args a;
505
506 if ( copy_from_user(&a, args, sizeof(a)) )
507 return -EFAULT;
508 if (a.advice == 4)
509 a.advice = POSIX_FADV_DONTNEED;
510 else if (a.advice == 5)
511 a.advice = POSIX_FADV_NOREUSE;
512 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
513}
514
