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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 *ruid, u16 __user *euid, u16 __user *suid)
135{
136 int retval;
137
138 if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) &&
139 !(retval = put_user(high2lowuid(current->cred->euid), euid)))
140 retval = put_user(high2lowuid(current->cred->suid), suid);
141
142 return retval;
143}
144
145asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
146{
147 return sys_setresgid(low2highgid(rgid), low2highgid(egid),
148 low2highgid(sgid));
149}
150
151asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
152{
153 int retval;
154
155 if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) &&
156 !(retval = put_user(high2lowgid(current->cred->egid), egid)))
157 retval = put_user(high2lowgid(current->cred->sgid), sgid);
158
159 return retval;
160}
161
162asmlinkage long sys32_setfsuid16(u16 uid)
163{
164 return sys_setfsuid((uid_t)uid);
165}
166
167asmlinkage long sys32_setfsgid16(u16 gid)
168{
169 return sys_setfsgid((gid_t)gid);
170}
171
172static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
173{
174 struct user_namespace *user_ns = current_user_ns();
175 int i;
176 u16 group;
177 kgid_t kgid;
178
179 for (i = 0; i < group_info->ngroups; i++) {
180 kgid = GROUP_AT(group_info, i);
181 group = (u16)from_kgid_munged(user_ns, kgid);
182 if (put_user(group, grouplist+i))
183 return -EFAULT;
184 }
185
186 return 0;
187}
188
189static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
190{
191 struct user_namespace *user_ns = current_user_ns();
192 int i;
193 u16 group;
194 kgid_t kgid;
195
196 for (i = 0; i < group_info->ngroups; i++) {
197 if (get_user(group, grouplist+i))
198 return -EFAULT;
199
200 kgid = make_kgid(user_ns, (gid_t)group);
201 if (!gid_valid(kgid))
202 return -EINVAL;
203
204 GROUP_AT(group_info, i) = kgid;
205 }
206
207 return 0;
208}
209
210asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
211{
212 int i;
213
214 if (gidsetsize < 0)
215 return -EINVAL;
216
217 get_group_info(current->cred->group_info);
218 i = current->cred->group_info->ngroups;
219 if (gidsetsize) {
220 if (i > gidsetsize) {
221 i = -EINVAL;
222 goto out;
223 }
224 if (groups16_to_user(grouplist, current->cred->group_info)) {
225 i = -EFAULT;
226 goto out;
227 }
228 }
229out:
230 put_group_info(current->cred->group_info);
231 return i;
232}
233
234asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
235{
236 struct group_info *group_info;
237 int retval;
238
239 if (!capable(CAP_SETGID))
240 return -EPERM;
241 if ((unsigned)gidsetsize > NGROUPS_MAX)
242 return -EINVAL;
243
244 group_info = groups_alloc(gidsetsize);
245 if (!group_info)
246 return -ENOMEM;
247 retval = groups16_from_user(group_info, grouplist);
248 if (retval) {
249 put_group_info(group_info);
250 return retval;
251 }
252
253 retval = set_current_groups(group_info);
254 put_group_info(group_info);
255
256 return retval;
257}
258
259asmlinkage long sys32_getuid16(void)
260{
261 return high2lowuid(current->cred->uid);
262}
263
264asmlinkage long sys32_geteuid16(void)
265{
266 return high2lowuid(current->cred->euid);
267}
268
269asmlinkage long sys32_getgid16(void)
270{
271 return high2lowgid(current->cred->gid);
272}
273
274asmlinkage long sys32_getegid16(void)
275{
276 return high2lowgid(current->cred->egid);
277}
278
279
280
281
282
283
284#ifdef CONFIG_SYSVIPC
285asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
286{
287 if (call >> 16)
288 return -EINVAL;
289 switch (call) {
290 case SEMTIMEDOP:
291 return compat_sys_semtimedop(first, compat_ptr(ptr),
292 second, compat_ptr(third));
293 case SEMOP:
294
295 return sys_semtimedop(first, compat_ptr(ptr),
296 second, NULL);
297 case SEMGET:
298 return sys_semget(first, second, third);
299 case SEMCTL:
300 return compat_sys_semctl(first, second, third,
301 compat_ptr(ptr));
302 case MSGSND:
303 return compat_sys_msgsnd(first, second, third,
304 compat_ptr(ptr));
305 case MSGRCV:
306 return compat_sys_msgrcv(first, second, 0, third,
307 0, compat_ptr(ptr));
308 case MSGGET:
309 return sys_msgget((key_t) first, second);
310 case MSGCTL:
311 return compat_sys_msgctl(first, second, compat_ptr(ptr));
312 case SHMAT:
313 return compat_sys_shmat(first, second, third,
314 0, compat_ptr(ptr));
315 case SHMDT:
316 return sys_shmdt(compat_ptr(ptr));
317 case SHMGET:
318 return sys_shmget(first, (unsigned)second, third);
319 case SHMCTL:
320 return compat_sys_shmctl(first, second, compat_ptr(ptr));
321 }
322
323 return -ENOSYS;
324}
325#endif
326
327asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
328{
329 if ((int)high < 0)
330 return -EINVAL;
331 else
332 return sys_truncate(path, (high << 32) | low);
333}
334
335asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
336{
337 if ((int)high < 0)
338 return -EINVAL;
339 else
340 return sys_ftruncate(fd, (high << 32) | low);
341}
342
343asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
344 struct compat_timespec __user *interval)
345{
346 struct timespec t;
347 int ret;
348 mm_segment_t old_fs = get_fs ();
349
350 set_fs (KERNEL_DS);
351 ret = sys_sched_rr_get_interval(pid,
352 (struct timespec __force __user *) &t);
353 set_fs (old_fs);
354 if (put_compat_timespec(&t, interval))
355 return -EFAULT;
356 return ret;
357}
358
359asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
360 compat_sigset_t __user *oset, size_t sigsetsize)
361{
362 sigset_t s;
363 compat_sigset_t s32;
364 int ret;
365 mm_segment_t old_fs = get_fs();
366
367 if (set) {
368 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
369 return -EFAULT;
370 s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
371 }
372 set_fs (KERNEL_DS);
373 ret = sys_rt_sigprocmask(how,
374 set ? (sigset_t __force __user *) &s : NULL,
375 oset ? (sigset_t __force __user *) &s : NULL,
376 sigsetsize);
377 set_fs (old_fs);
378 if (ret) return ret;
379 if (oset) {
380 s32.sig[1] = (s.sig[0] >> 32);
381 s32.sig[0] = s.sig[0];
382 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
383 return -EFAULT;
384 }
385 return 0;
386}
387
388asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
389 size_t sigsetsize)
390{
391 sigset_t s;
392 compat_sigset_t s32;
393 int ret;
394 mm_segment_t old_fs = get_fs();
395
396 set_fs (KERNEL_DS);
397 ret = sys_rt_sigpending((sigset_t __force __user *) &s, sigsetsize);
398 set_fs (old_fs);
399 if (!ret) {
400 s32.sig[1] = (s.sig[0] >> 32);
401 s32.sig[0] = s.sig[0];
402 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
403 return -EFAULT;
404 }
405 return ret;
406}
407
408asmlinkage long
409sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
410{
411 siginfo_t info;
412 int ret;
413 mm_segment_t old_fs = get_fs();
414
415 if (copy_siginfo_from_user32(&info, uinfo))
416 return -EFAULT;
417 set_fs (KERNEL_DS);
418 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __force __user *) &info);
419 set_fs (old_fs);
420 return ret;
421}
422
423
424
425
426
427asmlinkage long sys32_execve(const char __user *name, compat_uptr_t __user *argv,
428 compat_uptr_t __user *envp)
429{
430 struct pt_regs *regs = task_pt_regs(current);
431 char *filename;
432 long rc;
433
434 filename = getname(name);
435 rc = PTR_ERR(filename);
436 if (IS_ERR(filename))
437 return rc;
438 rc = compat_do_execve(filename, argv, envp, regs);
439 if (rc)
440 goto out;
441 current->thread.fp_regs.fpc=0;
442 asm volatile("sfpc %0,0" : : "d" (0));
443 rc = regs->gprs[2];
444out:
445 putname(filename);
446 return rc;
447}
448
449asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
450 size_t count, u32 poshi, u32 poslo)
451{
452 if ((compat_ssize_t) count < 0)
453 return -EINVAL;
454 return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
455}
456
457asmlinkage long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
458 size_t count, u32 poshi, u32 poslo)
459{
460 if ((compat_ssize_t) count < 0)
461 return -EINVAL;
462 return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
463}
464
465asmlinkage compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count)
466{
467 return sys_readahead(fd, ((loff_t)AA(offhi) << 32) | AA(offlo), count);
468}
469
470asmlinkage long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, size_t count)
471{
472 mm_segment_t old_fs = get_fs();
473 int ret;
474 off_t of;
475
476 if (offset && get_user(of, offset))
477 return -EFAULT;
478
479 set_fs(KERNEL_DS);
480 ret = sys_sendfile(out_fd, in_fd,
481 offset ? (off_t __force __user *) &of : NULL, count);
482 set_fs(old_fs);
483
484 if (offset && put_user(of, offset))
485 return -EFAULT;
486
487 return ret;
488}
489
490asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
491 compat_loff_t __user *offset, s32 count)
492{
493 mm_segment_t old_fs = get_fs();
494 int ret;
495 loff_t lof;
496
497 if (offset && get_user(lof, offset))
498 return -EFAULT;
499
500 set_fs(KERNEL_DS);
501 ret = sys_sendfile64(out_fd, in_fd,
502 offset ? (loff_t __force __user *) &lof : NULL,
503 count);
504 set_fs(old_fs);
505
506 if (offset && put_user(lof, offset))
507 return -EFAULT;
508
509 return ret;
510}
511
512struct stat64_emu31 {
513 unsigned long long st_dev;
514 unsigned int __pad1;
515#define STAT64_HAS_BROKEN_ST_INO 1
516 u32 __st_ino;
517 unsigned int st_mode;
518 unsigned int st_nlink;
519 u32 st_uid;
520 u32 st_gid;
521 unsigned long long st_rdev;
522 unsigned int __pad3;
523 long st_size;
524 u32 st_blksize;
525 unsigned char __pad4[4];
526 u32 __pad5;
527 u32 st_blocks;
528 u32 st_atime;
529 u32 __pad6;
530 u32 st_mtime;
531 u32 __pad7;
532 u32 st_ctime;
533 u32 __pad8;
534 unsigned long st_ino;
535};
536
537static int cp_stat64(struct stat64_emu31 __user *ubuf, struct kstat *stat)
538{
539 struct stat64_emu31 tmp;
540
541 memset(&tmp, 0, sizeof(tmp));
542
543 tmp.st_dev = huge_encode_dev(stat->dev);
544 tmp.st_ino = stat->ino;
545 tmp.__st_ino = (u32)stat->ino;
546 tmp.st_mode = stat->mode;
547 tmp.st_nlink = (unsigned int)stat->nlink;
548 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
549 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
550 tmp.st_rdev = huge_encode_dev(stat->rdev);
551 tmp.st_size = stat->size;
552 tmp.st_blksize = (u32)stat->blksize;
553 tmp.st_blocks = (u32)stat->blocks;
554 tmp.st_atime = (u32)stat->atime.tv_sec;
555 tmp.st_mtime = (u32)stat->mtime.tv_sec;
556 tmp.st_ctime = (u32)stat->ctime.tv_sec;
557
558 return copy_to_user(ubuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
559}
560
561asmlinkage long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
562{
563 struct kstat stat;
564 int ret = vfs_stat(filename, &stat);
565 if (!ret)
566 ret = cp_stat64(statbuf, &stat);
567 return ret;
568}
569
570asmlinkage long sys32_lstat64(const char __user * filename, struct stat64_emu31 __user * statbuf)
571{
572 struct kstat stat;
573 int ret = vfs_lstat(filename, &stat);
574 if (!ret)
575 ret = cp_stat64(statbuf, &stat);
576 return ret;
577}
578
579asmlinkage long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf)
580{
581 struct kstat stat;
582 int ret = vfs_fstat(fd, &stat);
583 if (!ret)
584 ret = cp_stat64(statbuf, &stat);
585 return ret;
586}
587
588asmlinkage long sys32_fstatat64(unsigned int dfd, const char __user *filename,
589 struct stat64_emu31 __user* statbuf, int flag)
590{
591 struct kstat stat;
592 int error;
593
594 error = vfs_fstatat(dfd, filename, &stat, flag);
595 if (error)
596 return error;
597 return cp_stat64(statbuf, &stat);
598}
599
600
601
602
603
604
605
606struct mmap_arg_struct_emu31 {
607 compat_ulong_t addr;
608 compat_ulong_t len;
609 compat_ulong_t prot;
610 compat_ulong_t flags;
611 compat_ulong_t fd;
612 compat_ulong_t offset;
613};
614
615asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
616{
617 struct mmap_arg_struct_emu31 a;
618
619 if (copy_from_user(&a, arg, sizeof(a)))
620 return -EFAULT;
621 if (a.offset & ~PAGE_MASK)
622 return -EINVAL;
623 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
624 a.offset >> PAGE_SHIFT);
625}
626
627asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
628{
629 struct mmap_arg_struct_emu31 a;
630
631 if (copy_from_user(&a, arg, sizeof(a)))
632 return -EFAULT;
633 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
634}
635
636asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)
637{
638 if ((compat_ssize_t) count < 0)
639 return -EINVAL;
640
641 return sys_read(fd, buf, count);
642}
643
644asmlinkage long sys32_write(unsigned int fd, const char __user * buf, size_t count)
645{
646 if ((compat_ssize_t) count < 0)
647 return -EINVAL;
648
649 return sys_write(fd, buf, count);
650}
651
652
653
654
655
656
657
658asmlinkage long
659sys32_fadvise64(int fd, loff_t offset, size_t len, int advise)
660{
661 if (advise == 4)
662 advise = POSIX_FADV_DONTNEED;
663 else if (advise == 5)
664 advise = POSIX_FADV_NOREUSE;
665 return sys_fadvise64(fd, offset, len, advise);
666}
667
668struct fadvise64_64_args {
669 int fd;
670 long long offset;
671 long long len;
672 int advice;
673};
674
675asmlinkage long
676sys32_fadvise64_64(struct fadvise64_64_args __user *args)
677{
678 struct fadvise64_64_args a;
679
680 if ( copy_from_user(&a, args, sizeof(a)) )
681 return -EFAULT;
682 if (a.advice == 4)
683 a.advice = POSIX_FADV_DONTNEED;
684 else if (a.advice == 5)
685 a.advice = POSIX_FADV_NOREUSE;
686 return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
687}
688
