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