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Source at commit b13e7eb172b6f08e5fc22da162bdde5fcde201b5 created 11 years 11 months ago. By Maarten ter Huurne, fbcon: Add 6x10 font | |
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1 | /* |
2 | * linux/kernel/compat.c |
3 | * |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support |
5 | * on 64 bit kernels. |
6 | * |
7 | * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 as |
11 | * published by the Free Software Foundation. |
12 | */ |
13 | |
14 | #include <linux/linkage.h> |
15 | #include <linux/compat.h> |
16 | #include <linux/errno.h> |
17 | #include <linux/time.h> |
18 | #include <linux/signal.h> |
19 | #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */ |
20 | #include <linux/syscalls.h> |
21 | #include <linux/unistd.h> |
22 | #include <linux/security.h> |
23 | #include <linux/timex.h> |
24 | #include <linux/export.h> |
25 | #include <linux/migrate.h> |
26 | #include <linux/posix-timers.h> |
27 | #include <linux/times.h> |
28 | #include <linux/ptrace.h> |
29 | #include <linux/gfp.h> |
30 | |
31 | #include <asm/uaccess.h> |
32 | |
33 | /* |
34 | * Note that the native side is already converted to a timespec, because |
35 | * that's what we want anyway. |
36 | */ |
37 | static int compat_get_timeval(struct timespec *o, |
38 | struct compat_timeval __user *i) |
39 | { |
40 | long usec; |
41 | |
42 | if (get_user(o->tv_sec, &i->tv_sec) || |
43 | get_user(usec, &i->tv_usec)) |
44 | return -EFAULT; |
45 | o->tv_nsec = usec * 1000; |
46 | return 0; |
47 | } |
48 | |
49 | static int compat_put_timeval(struct compat_timeval __user *o, |
50 | struct timeval *i) |
51 | { |
52 | return (put_user(i->tv_sec, &o->tv_sec) || |
53 | put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; |
54 | } |
55 | |
56 | static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) |
57 | { |
58 | memset(txc, 0, sizeof(struct timex)); |
59 | |
60 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || |
61 | __get_user(txc->modes, &utp->modes) || |
62 | __get_user(txc->offset, &utp->offset) || |
63 | __get_user(txc->freq, &utp->freq) || |
64 | __get_user(txc->maxerror, &utp->maxerror) || |
65 | __get_user(txc->esterror, &utp->esterror) || |
66 | __get_user(txc->status, &utp->status) || |
67 | __get_user(txc->constant, &utp->constant) || |
68 | __get_user(txc->precision, &utp->precision) || |
69 | __get_user(txc->tolerance, &utp->tolerance) || |
70 | __get_user(txc->time.tv_sec, &utp->time.tv_sec) || |
71 | __get_user(txc->time.tv_usec, &utp->time.tv_usec) || |
72 | __get_user(txc->tick, &utp->tick) || |
73 | __get_user(txc->ppsfreq, &utp->ppsfreq) || |
74 | __get_user(txc->jitter, &utp->jitter) || |
75 | __get_user(txc->shift, &utp->shift) || |
76 | __get_user(txc->stabil, &utp->stabil) || |
77 | __get_user(txc->jitcnt, &utp->jitcnt) || |
78 | __get_user(txc->calcnt, &utp->calcnt) || |
79 | __get_user(txc->errcnt, &utp->errcnt) || |
80 | __get_user(txc->stbcnt, &utp->stbcnt)) |
81 | return -EFAULT; |
82 | |
83 | return 0; |
84 | } |
85 | |
86 | static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) |
87 | { |
88 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || |
89 | __put_user(txc->modes, &utp->modes) || |
90 | __put_user(txc->offset, &utp->offset) || |
91 | __put_user(txc->freq, &utp->freq) || |
92 | __put_user(txc->maxerror, &utp->maxerror) || |
93 | __put_user(txc->esterror, &utp->esterror) || |
94 | __put_user(txc->status, &utp->status) || |
95 | __put_user(txc->constant, &utp->constant) || |
96 | __put_user(txc->precision, &utp->precision) || |
97 | __put_user(txc->tolerance, &utp->tolerance) || |
98 | __put_user(txc->time.tv_sec, &utp->time.tv_sec) || |
99 | __put_user(txc->time.tv_usec, &utp->time.tv_usec) || |
100 | __put_user(txc->tick, &utp->tick) || |
101 | __put_user(txc->ppsfreq, &utp->ppsfreq) || |
102 | __put_user(txc->jitter, &utp->jitter) || |
103 | __put_user(txc->shift, &utp->shift) || |
104 | __put_user(txc->stabil, &utp->stabil) || |
105 | __put_user(txc->jitcnt, &utp->jitcnt) || |
106 | __put_user(txc->calcnt, &utp->calcnt) || |
107 | __put_user(txc->errcnt, &utp->errcnt) || |
108 | __put_user(txc->stbcnt, &utp->stbcnt) || |
109 | __put_user(txc->tai, &utp->tai)) |
110 | return -EFAULT; |
111 | return 0; |
112 | } |
113 | |
114 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
115 | struct timezone __user *tz) |
116 | { |
117 | if (tv) { |
118 | struct timeval ktv; |
119 | do_gettimeofday(&ktv); |
120 | if (compat_put_timeval(tv, &ktv)) |
121 | return -EFAULT; |
122 | } |
123 | if (tz) { |
124 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
125 | return -EFAULT; |
126 | } |
127 | |
128 | return 0; |
129 | } |
130 | |
131 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, |
132 | struct timezone __user *tz) |
133 | { |
134 | struct timespec kts; |
135 | struct timezone ktz; |
136 | |
137 | if (tv) { |
138 | if (compat_get_timeval(&kts, tv)) |
139 | return -EFAULT; |
140 | } |
141 | if (tz) { |
142 | if (copy_from_user(&ktz, tz, sizeof(ktz))) |
143 | return -EFAULT; |
144 | } |
145 | |
146 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
147 | } |
148 | |
149 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
150 | { |
151 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || |
152 | __get_user(ts->tv_sec, &cts->tv_sec) || |
153 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
154 | } |
155 | |
156 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
157 | { |
158 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || |
159 | __put_user(ts->tv_sec, &cts->tv_sec) || |
160 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
161 | } |
162 | EXPORT_SYMBOL_GPL(put_compat_timespec); |
163 | |
164 | static long compat_nanosleep_restart(struct restart_block *restart) |
165 | { |
166 | struct compat_timespec __user *rmtp; |
167 | struct timespec rmt; |
168 | mm_segment_t oldfs; |
169 | long ret; |
170 | |
171 | restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
172 | oldfs = get_fs(); |
173 | set_fs(KERNEL_DS); |
174 | ret = hrtimer_nanosleep_restart(restart); |
175 | set_fs(oldfs); |
176 | |
177 | if (ret) { |
178 | rmtp = restart->nanosleep.compat_rmtp; |
179 | |
180 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
181 | return -EFAULT; |
182 | } |
183 | |
184 | return ret; |
185 | } |
186 | |
187 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
188 | struct compat_timespec __user *rmtp) |
189 | { |
190 | struct timespec tu, rmt; |
191 | mm_segment_t oldfs; |
192 | long ret; |
193 | |
194 | if (get_compat_timespec(&tu, rqtp)) |
195 | return -EFAULT; |
196 | |
197 | if (!timespec_valid(&tu)) |
198 | return -EINVAL; |
199 | |
200 | oldfs = get_fs(); |
201 | set_fs(KERNEL_DS); |
202 | ret = hrtimer_nanosleep(&tu, |
203 | rmtp ? (struct timespec __user *)&rmt : NULL, |
204 | HRTIMER_MODE_REL, CLOCK_MONOTONIC); |
205 | set_fs(oldfs); |
206 | |
207 | if (ret) { |
208 | struct restart_block *restart |
209 | = ¤t_thread_info()->restart_block; |
210 | |
211 | restart->fn = compat_nanosleep_restart; |
212 | restart->nanosleep.compat_rmtp = rmtp; |
213 | |
214 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
215 | return -EFAULT; |
216 | } |
217 | |
218 | return ret; |
219 | } |
220 | |
221 | static inline long get_compat_itimerval(struct itimerval *o, |
222 | struct compat_itimerval __user *i) |
223 | { |
224 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || |
225 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | |
226 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | |
227 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | |
228 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); |
229 | } |
230 | |
231 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, |
232 | struct itimerval *i) |
233 | { |
234 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || |
235 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | |
236 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | |
237 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | |
238 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); |
239 | } |
240 | |
241 | asmlinkage long compat_sys_getitimer(int which, |
242 | struct compat_itimerval __user *it) |
243 | { |
244 | struct itimerval kit; |
245 | int error; |
246 | |
247 | error = do_getitimer(which, &kit); |
248 | if (!error && put_compat_itimerval(it, &kit)) |
249 | error = -EFAULT; |
250 | return error; |
251 | } |
252 | |
253 | asmlinkage long compat_sys_setitimer(int which, |
254 | struct compat_itimerval __user *in, |
255 | struct compat_itimerval __user *out) |
256 | { |
257 | struct itimerval kin, kout; |
258 | int error; |
259 | |
260 | if (in) { |
261 | if (get_compat_itimerval(&kin, in)) |
262 | return -EFAULT; |
263 | } else |
264 | memset(&kin, 0, sizeof(kin)); |
265 | |
266 | error = do_setitimer(which, &kin, out ? &kout : NULL); |
267 | if (error || !out) |
268 | return error; |
269 | if (put_compat_itimerval(out, &kout)) |
270 | return -EFAULT; |
271 | return 0; |
272 | } |
273 | |
274 | static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
275 | { |
276 | return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); |
277 | } |
278 | |
279 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
280 | { |
281 | if (tbuf) { |
282 | struct tms tms; |
283 | struct compat_tms tmp; |
284 | |
285 | do_sys_times(&tms); |
286 | /* Convert our struct tms to the compat version. */ |
287 | tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); |
288 | tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); |
289 | tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); |
290 | tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); |
291 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
292 | return -EFAULT; |
293 | } |
294 | force_successful_syscall_return(); |
295 | return compat_jiffies_to_clock_t(jiffies); |
296 | } |
297 | |
298 | #ifdef __ARCH_WANT_SYS_SIGPENDING |
299 | |
300 | /* |
301 | * Assumption: old_sigset_t and compat_old_sigset_t are both |
302 | * types that can be passed to put_user()/get_user(). |
303 | */ |
304 | |
305 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) |
306 | { |
307 | old_sigset_t s; |
308 | long ret; |
309 | mm_segment_t old_fs = get_fs(); |
310 | |
311 | set_fs(KERNEL_DS); |
312 | ret = sys_sigpending((old_sigset_t __user *) &s); |
313 | set_fs(old_fs); |
314 | if (ret == 0) |
315 | ret = put_user(s, set); |
316 | return ret; |
317 | } |
318 | |
319 | #endif |
320 | |
321 | #ifdef __ARCH_WANT_SYS_SIGPROCMASK |
322 | |
323 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
324 | compat_old_sigset_t __user *oset) |
325 | { |
326 | old_sigset_t s; |
327 | long ret; |
328 | mm_segment_t old_fs; |
329 | |
330 | if (set && get_user(s, set)) |
331 | return -EFAULT; |
332 | old_fs = get_fs(); |
333 | set_fs(KERNEL_DS); |
334 | ret = sys_sigprocmask(how, |
335 | set ? (old_sigset_t __user *) &s : NULL, |
336 | oset ? (old_sigset_t __user *) &s : NULL); |
337 | set_fs(old_fs); |
338 | if (ret == 0) |
339 | if (oset) |
340 | ret = put_user(s, oset); |
341 | return ret; |
342 | } |
343 | |
344 | #endif |
345 | |
346 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
347 | struct compat_rlimit __user *rlim) |
348 | { |
349 | struct rlimit r; |
350 | |
351 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || |
352 | __get_user(r.rlim_cur, &rlim->rlim_cur) || |
353 | __get_user(r.rlim_max, &rlim->rlim_max)) |
354 | return -EFAULT; |
355 | |
356 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) |
357 | r.rlim_cur = RLIM_INFINITY; |
358 | if (r.rlim_max == COMPAT_RLIM_INFINITY) |
359 | r.rlim_max = RLIM_INFINITY; |
360 | return do_prlimit(current, resource, &r, NULL); |
361 | } |
362 | |
363 | #ifdef COMPAT_RLIM_OLD_INFINITY |
364 | |
365 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, |
366 | struct compat_rlimit __user *rlim) |
367 | { |
368 | struct rlimit r; |
369 | int ret; |
370 | mm_segment_t old_fs = get_fs(); |
371 | |
372 | set_fs(KERNEL_DS); |
373 | ret = sys_old_getrlimit(resource, &r); |
374 | set_fs(old_fs); |
375 | |
376 | if (!ret) { |
377 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) |
378 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
379 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) |
380 | r.rlim_max = COMPAT_RLIM_INFINITY; |
381 | |
382 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
383 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
384 | __put_user(r.rlim_max, &rlim->rlim_max)) |
385 | return -EFAULT; |
386 | } |
387 | return ret; |
388 | } |
389 | |
390 | #endif |
391 | |
392 | asmlinkage long compat_sys_getrlimit(unsigned int resource, |
393 | struct compat_rlimit __user *rlim) |
394 | { |
395 | struct rlimit r; |
396 | int ret; |
397 | |
398 | ret = do_prlimit(current, resource, NULL, &r); |
399 | if (!ret) { |
400 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) |
401 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
402 | if (r.rlim_max > COMPAT_RLIM_INFINITY) |
403 | r.rlim_max = COMPAT_RLIM_INFINITY; |
404 | |
405 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
406 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
407 | __put_user(r.rlim_max, &rlim->rlim_max)) |
408 | return -EFAULT; |
409 | } |
410 | return ret; |
411 | } |
412 | |
413 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) |
414 | { |
415 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || |
416 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || |
417 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || |
418 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || |
419 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || |
420 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || |
421 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || |
422 | __put_user(r->ru_idrss, &ru->ru_idrss) || |
423 | __put_user(r->ru_isrss, &ru->ru_isrss) || |
424 | __put_user(r->ru_minflt, &ru->ru_minflt) || |
425 | __put_user(r->ru_majflt, &ru->ru_majflt) || |
426 | __put_user(r->ru_nswap, &ru->ru_nswap) || |
427 | __put_user(r->ru_inblock, &ru->ru_inblock) || |
428 | __put_user(r->ru_oublock, &ru->ru_oublock) || |
429 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || |
430 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || |
431 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || |
432 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || |
433 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) |
434 | return -EFAULT; |
435 | return 0; |
436 | } |
437 | |
438 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) |
439 | { |
440 | struct rusage r; |
441 | int ret; |
442 | mm_segment_t old_fs = get_fs(); |
443 | |
444 | set_fs(KERNEL_DS); |
445 | ret = sys_getrusage(who, (struct rusage __user *) &r); |
446 | set_fs(old_fs); |
447 | |
448 | if (ret) |
449 | return ret; |
450 | |
451 | if (put_compat_rusage(&r, ru)) |
452 | return -EFAULT; |
453 | |
454 | return 0; |
455 | } |
456 | |
457 | asmlinkage long |
458 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, |
459 | struct compat_rusage __user *ru) |
460 | { |
461 | if (!ru) { |
462 | return sys_wait4(pid, stat_addr, options, NULL); |
463 | } else { |
464 | struct rusage r; |
465 | int ret; |
466 | unsigned int status; |
467 | mm_segment_t old_fs = get_fs(); |
468 | |
469 | set_fs (KERNEL_DS); |
470 | ret = sys_wait4(pid, |
471 | (stat_addr ? |
472 | (unsigned int __user *) &status : NULL), |
473 | options, (struct rusage __user *) &r); |
474 | set_fs (old_fs); |
475 | |
476 | if (ret > 0) { |
477 | if (put_compat_rusage(&r, ru)) |
478 | return -EFAULT; |
479 | if (stat_addr && put_user(status, stat_addr)) |
480 | return -EFAULT; |
481 | } |
482 | return ret; |
483 | } |
484 | } |
485 | |
486 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, |
487 | struct compat_siginfo __user *uinfo, int options, |
488 | struct compat_rusage __user *uru) |
489 | { |
490 | siginfo_t info; |
491 | struct rusage ru; |
492 | long ret; |
493 | mm_segment_t old_fs = get_fs(); |
494 | |
495 | memset(&info, 0, sizeof(info)); |
496 | |
497 | set_fs(KERNEL_DS); |
498 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, |
499 | uru ? (struct rusage __user *)&ru : NULL); |
500 | set_fs(old_fs); |
501 | |
502 | if ((ret < 0) || (info.si_signo == 0)) |
503 | return ret; |
504 | |
505 | if (uru) { |
506 | ret = put_compat_rusage(&ru, uru); |
507 | if (ret) |
508 | return ret; |
509 | } |
510 | |
511 | BUG_ON(info.si_code & __SI_MASK); |
512 | info.si_code |= __SI_CHLD; |
513 | return copy_siginfo_to_user32(uinfo, &info); |
514 | } |
515 | |
516 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
517 | unsigned len, struct cpumask *new_mask) |
518 | { |
519 | unsigned long *k; |
520 | |
521 | if (len < cpumask_size()) |
522 | memset(new_mask, 0, cpumask_size()); |
523 | else if (len > cpumask_size()) |
524 | len = cpumask_size(); |
525 | |
526 | k = cpumask_bits(new_mask); |
527 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
528 | } |
529 | |
530 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, |
531 | unsigned int len, |
532 | compat_ulong_t __user *user_mask_ptr) |
533 | { |
534 | cpumask_var_t new_mask; |
535 | int retval; |
536 | |
537 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
538 | return -ENOMEM; |
539 | |
540 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
541 | if (retval) |
542 | goto out; |
543 | |
544 | retval = sched_setaffinity(pid, new_mask); |
545 | out: |
546 | free_cpumask_var(new_mask); |
547 | return retval; |
548 | } |
549 | |
550 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, |
551 | compat_ulong_t __user *user_mask_ptr) |
552 | { |
553 | int ret; |
554 | cpumask_var_t mask; |
555 | |
556 | if ((len * BITS_PER_BYTE) < nr_cpu_ids) |
557 | return -EINVAL; |
558 | if (len & (sizeof(compat_ulong_t)-1)) |
559 | return -EINVAL; |
560 | |
561 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
562 | return -ENOMEM; |
563 | |
564 | ret = sched_getaffinity(pid, mask); |
565 | if (ret == 0) { |
566 | size_t retlen = min_t(size_t, len, cpumask_size()); |
567 | |
568 | if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) |
569 | ret = -EFAULT; |
570 | else |
571 | ret = retlen; |
572 | } |
573 | free_cpumask_var(mask); |
574 | |
575 | return ret; |
576 | } |
577 | |
578 | int get_compat_itimerspec(struct itimerspec *dst, |
579 | const struct compat_itimerspec __user *src) |
580 | { |
581 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
582 | get_compat_timespec(&dst->it_value, &src->it_value)) |
583 | return -EFAULT; |
584 | return 0; |
585 | } |
586 | |
587 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
588 | const struct itimerspec *src) |
589 | { |
590 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
591 | put_compat_timespec(&src->it_value, &dst->it_value)) |
592 | return -EFAULT; |
593 | return 0; |
594 | } |
595 | |
596 | long compat_sys_timer_create(clockid_t which_clock, |
597 | struct compat_sigevent __user *timer_event_spec, |
598 | timer_t __user *created_timer_id) |
599 | { |
600 | struct sigevent __user *event = NULL; |
601 | |
602 | if (timer_event_spec) { |
603 | struct sigevent kevent; |
604 | |
605 | event = compat_alloc_user_space(sizeof(*event)); |
606 | if (get_compat_sigevent(&kevent, timer_event_spec) || |
607 | copy_to_user(event, &kevent, sizeof(*event))) |
608 | return -EFAULT; |
609 | } |
610 | |
611 | return sys_timer_create(which_clock, event, created_timer_id); |
612 | } |
613 | |
614 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
615 | struct compat_itimerspec __user *new, |
616 | struct compat_itimerspec __user *old) |
617 | { |
618 | long err; |
619 | mm_segment_t oldfs; |
620 | struct itimerspec newts, oldts; |
621 | |
622 | if (!new) |
623 | return -EINVAL; |
624 | if (get_compat_itimerspec(&newts, new)) |
625 | return -EFAULT; |
626 | oldfs = get_fs(); |
627 | set_fs(KERNEL_DS); |
628 | err = sys_timer_settime(timer_id, flags, |
629 | (struct itimerspec __user *) &newts, |
630 | (struct itimerspec __user *) &oldts); |
631 | set_fs(oldfs); |
632 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
633 | return -EFAULT; |
634 | return err; |
635 | } |
636 | |
637 | long compat_sys_timer_gettime(timer_t timer_id, |
638 | struct compat_itimerspec __user *setting) |
639 | { |
640 | long err; |
641 | mm_segment_t oldfs; |
642 | struct itimerspec ts; |
643 | |
644 | oldfs = get_fs(); |
645 | set_fs(KERNEL_DS); |
646 | err = sys_timer_gettime(timer_id, |
647 | (struct itimerspec __user *) &ts); |
648 | set_fs(oldfs); |
649 | if (!err && put_compat_itimerspec(setting, &ts)) |
650 | return -EFAULT; |
651 | return err; |
652 | } |
653 | |
654 | long compat_sys_clock_settime(clockid_t which_clock, |
655 | struct compat_timespec __user *tp) |
656 | { |
657 | long err; |
658 | mm_segment_t oldfs; |
659 | struct timespec ts; |
660 | |
661 | if (get_compat_timespec(&ts, tp)) |
662 | return -EFAULT; |
663 | oldfs = get_fs(); |
664 | set_fs(KERNEL_DS); |
665 | err = sys_clock_settime(which_clock, |
666 | (struct timespec __user *) &ts); |
667 | set_fs(oldfs); |
668 | return err; |
669 | } |
670 | |
671 | long compat_sys_clock_gettime(clockid_t which_clock, |
672 | struct compat_timespec __user *tp) |
673 | { |
674 | long err; |
675 | mm_segment_t oldfs; |
676 | struct timespec ts; |
677 | |
678 | oldfs = get_fs(); |
679 | set_fs(KERNEL_DS); |
680 | err = sys_clock_gettime(which_clock, |
681 | (struct timespec __user *) &ts); |
682 | set_fs(oldfs); |
683 | if (!err && put_compat_timespec(&ts, tp)) |
684 | return -EFAULT; |
685 | return err; |
686 | } |
687 | |
688 | long compat_sys_clock_adjtime(clockid_t which_clock, |
689 | struct compat_timex __user *utp) |
690 | { |
691 | struct timex txc; |
692 | mm_segment_t oldfs; |
693 | int err, ret; |
694 | |
695 | err = compat_get_timex(&txc, utp); |
696 | if (err) |
697 | return err; |
698 | |
699 | oldfs = get_fs(); |
700 | set_fs(KERNEL_DS); |
701 | ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); |
702 | set_fs(oldfs); |
703 | |
704 | err = compat_put_timex(utp, &txc); |
705 | if (err) |
706 | return err; |
707 | |
708 | return ret; |
709 | } |
710 | |
711 | long compat_sys_clock_getres(clockid_t which_clock, |
712 | struct compat_timespec __user *tp) |
713 | { |
714 | long err; |
715 | mm_segment_t oldfs; |
716 | struct timespec ts; |
717 | |
718 | oldfs = get_fs(); |
719 | set_fs(KERNEL_DS); |
720 | err = sys_clock_getres(which_clock, |
721 | (struct timespec __user *) &ts); |
722 | set_fs(oldfs); |
723 | if (!err && tp && put_compat_timespec(&ts, tp)) |
724 | return -EFAULT; |
725 | return err; |
726 | } |
727 | |
728 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
729 | { |
730 | long err; |
731 | mm_segment_t oldfs; |
732 | struct timespec tu; |
733 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
734 | |
735 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
736 | oldfs = get_fs(); |
737 | set_fs(KERNEL_DS); |
738 | err = clock_nanosleep_restart(restart); |
739 | set_fs(oldfs); |
740 | |
741 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
742 | put_compat_timespec(&tu, rmtp)) |
743 | return -EFAULT; |
744 | |
745 | if (err == -ERESTART_RESTARTBLOCK) { |
746 | restart->fn = compat_clock_nanosleep_restart; |
747 | restart->nanosleep.compat_rmtp = rmtp; |
748 | } |
749 | return err; |
750 | } |
751 | |
752 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
753 | struct compat_timespec __user *rqtp, |
754 | struct compat_timespec __user *rmtp) |
755 | { |
756 | long err; |
757 | mm_segment_t oldfs; |
758 | struct timespec in, out; |
759 | struct restart_block *restart; |
760 | |
761 | if (get_compat_timespec(&in, rqtp)) |
762 | return -EFAULT; |
763 | |
764 | oldfs = get_fs(); |
765 | set_fs(KERNEL_DS); |
766 | err = sys_clock_nanosleep(which_clock, flags, |
767 | (struct timespec __user *) &in, |
768 | (struct timespec __user *) &out); |
769 | set_fs(oldfs); |
770 | |
771 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
772 | put_compat_timespec(&out, rmtp)) |
773 | return -EFAULT; |
774 | |
775 | if (err == -ERESTART_RESTARTBLOCK) { |
776 | restart = ¤t_thread_info()->restart_block; |
777 | restart->fn = compat_clock_nanosleep_restart; |
778 | restart->nanosleep.compat_rmtp = rmtp; |
779 | } |
780 | return err; |
781 | } |
782 | |
783 | /* |
784 | * We currently only need the following fields from the sigevent |
785 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes |
786 | * sigev_notify_thread_id). The others are handled in user mode. |
787 | * We also assume that copying sigev_value.sival_int is sufficient |
788 | * to keep all the bits of sigev_value.sival_ptr intact. |
789 | */ |
790 | int get_compat_sigevent(struct sigevent *event, |
791 | const struct compat_sigevent __user *u_event) |
792 | { |
793 | memset(event, 0, sizeof(*event)); |
794 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
795 | __get_user(event->sigev_value.sival_int, |
796 | &u_event->sigev_value.sival_int) || |
797 | __get_user(event->sigev_signo, &u_event->sigev_signo) || |
798 | __get_user(event->sigev_notify, &u_event->sigev_notify) || |
799 | __get_user(event->sigev_notify_thread_id, |
800 | &u_event->sigev_notify_thread_id)) |
801 | ? -EFAULT : 0; |
802 | } |
803 | |
804 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
805 | unsigned long bitmap_size) |
806 | { |
807 | int i, j; |
808 | unsigned long m; |
809 | compat_ulong_t um; |
810 | unsigned long nr_compat_longs; |
811 | |
812 | /* align bitmap up to nearest compat_long_t boundary */ |
813 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
814 | |
815 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) |
816 | return -EFAULT; |
817 | |
818 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
819 | |
820 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
821 | m = 0; |
822 | |
823 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
824 | /* |
825 | * We dont want to read past the end of the userspace |
826 | * bitmap. We must however ensure the end of the |
827 | * kernel bitmap is zeroed. |
828 | */ |
829 | if (nr_compat_longs-- > 0) { |
830 | if (__get_user(um, umask)) |
831 | return -EFAULT; |
832 | } else { |
833 | um = 0; |
834 | } |
835 | |
836 | umask++; |
837 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); |
838 | } |
839 | *mask++ = m; |
840 | } |
841 | |
842 | return 0; |
843 | } |
844 | |
845 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, |
846 | unsigned long bitmap_size) |
847 | { |
848 | int i, j; |
849 | unsigned long m; |
850 | compat_ulong_t um; |
851 | unsigned long nr_compat_longs; |
852 | |
853 | /* align bitmap up to nearest compat_long_t boundary */ |
854 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
855 | |
856 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) |
857 | return -EFAULT; |
858 | |
859 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
860 | |
861 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
862 | m = *mask++; |
863 | |
864 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
865 | um = m; |
866 | |
867 | /* |
868 | * We dont want to write past the end of the userspace |
869 | * bitmap. |
870 | */ |
871 | if (nr_compat_longs-- > 0) { |
872 | if (__put_user(um, umask)) |
873 | return -EFAULT; |
874 | } |
875 | |
876 | umask++; |
877 | m >>= 4*sizeof(um); |
878 | m >>= 4*sizeof(um); |
879 | } |
880 | } |
881 | |
882 | return 0; |
883 | } |
884 | |
885 | void |
886 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) |
887 | { |
888 | switch (_NSIG_WORDS) { |
889 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
890 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); |
891 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); |
892 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
893 | } |
894 | } |
895 | EXPORT_SYMBOL_GPL(sigset_from_compat); |
896 | |
897 | asmlinkage long |
898 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, |
899 | struct compat_siginfo __user *uinfo, |
900 | struct compat_timespec __user *uts, compat_size_t sigsetsize) |
901 | { |
902 | compat_sigset_t s32; |
903 | sigset_t s; |
904 | struct timespec t; |
905 | siginfo_t info; |
906 | long ret; |
907 | |
908 | if (sigsetsize != sizeof(sigset_t)) |
909 | return -EINVAL; |
910 | |
911 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) |
912 | return -EFAULT; |
913 | sigset_from_compat(&s, &s32); |
914 | |
915 | if (uts) { |
916 | if (get_compat_timespec(&t, uts)) |
917 | return -EFAULT; |
918 | } |
919 | |
920 | ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
921 | |
922 | if (ret > 0 && uinfo) { |
923 | if (copy_siginfo_to_user32(uinfo, &info)) |
924 | ret = -EFAULT; |
925 | } |
926 | |
927 | return ret; |
928 | |
929 | } |
930 | |
931 | asmlinkage long |
932 | compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, |
933 | struct compat_siginfo __user *uinfo) |
934 | { |
935 | siginfo_t info; |
936 | |
937 | if (copy_siginfo_from_user32(&info, uinfo)) |
938 | return -EFAULT; |
939 | return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); |
940 | } |
941 | |
942 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
943 | |
944 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ |
945 | |
946 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) |
947 | { |
948 | compat_time_t i; |
949 | struct timeval tv; |
950 | |
951 | do_gettimeofday(&tv); |
952 | i = tv.tv_sec; |
953 | |
954 | if (tloc) { |
955 | if (put_user(i,tloc)) |
956 | return -EFAULT; |
957 | } |
958 | force_successful_syscall_return(); |
959 | return i; |
960 | } |
961 | |
962 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) |
963 | { |
964 | struct timespec tv; |
965 | int err; |
966 | |
967 | if (get_user(tv.tv_sec, tptr)) |
968 | return -EFAULT; |
969 | |
970 | tv.tv_nsec = 0; |
971 | |
972 | err = security_settime(&tv, NULL); |
973 | if (err) |
974 | return err; |
975 | |
976 | do_settimeofday(&tv); |
977 | return 0; |
978 | } |
979 | |
980 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
981 | |
982 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND |
983 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) |
984 | { |
985 | sigset_t newset; |
986 | compat_sigset_t newset32; |
987 | |
988 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
989 | if (sigsetsize != sizeof(sigset_t)) |
990 | return -EINVAL; |
991 | |
992 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) |
993 | return -EFAULT; |
994 | sigset_from_compat(&newset, &newset32); |
995 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
996 | |
997 | current->saved_sigmask = current->blocked; |
998 | set_current_blocked(&newset); |
999 | |
1000 | current->state = TASK_INTERRUPTIBLE; |
1001 | schedule(); |
1002 | set_restore_sigmask(); |
1003 | return -ERESTARTNOHAND; |
1004 | } |
1005 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
1006 | |
1007 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
1008 | { |
1009 | struct timex txc; |
1010 | int err, ret; |
1011 | |
1012 | err = compat_get_timex(&txc, utp); |
1013 | if (err) |
1014 | return err; |
1015 | |
1016 | ret = do_adjtimex(&txc); |
1017 | |
1018 | err = compat_put_timex(utp, &txc); |
1019 | if (err) |
1020 | return err; |
1021 | |
1022 | return ret; |
1023 | } |
1024 | |
1025 | #ifdef CONFIG_NUMA |
1026 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
1027 | compat_uptr_t __user *pages32, |
1028 | const int __user *nodes, |
1029 | int __user *status, |
1030 | int flags) |
1031 | { |
1032 | const void __user * __user *pages; |
1033 | int i; |
1034 | |
1035 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); |
1036 | for (i = 0; i < nr_pages; i++) { |
1037 | compat_uptr_t p; |
1038 | |
1039 | if (get_user(p, pages32 + i) || |
1040 | put_user(compat_ptr(p), pages + i)) |
1041 | return -EFAULT; |
1042 | } |
1043 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); |
1044 | } |
1045 | |
1046 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, |
1047 | compat_ulong_t maxnode, |
1048 | const compat_ulong_t __user *old_nodes, |
1049 | const compat_ulong_t __user *new_nodes) |
1050 | { |
1051 | unsigned long __user *old = NULL; |
1052 | unsigned long __user *new = NULL; |
1053 | nodemask_t tmp_mask; |
1054 | unsigned long nr_bits; |
1055 | unsigned long size; |
1056 | |
1057 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); |
1058 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; |
1059 | if (old_nodes) { |
1060 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) |
1061 | return -EFAULT; |
1062 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); |
1063 | if (new_nodes) |
1064 | new = old + size / sizeof(unsigned long); |
1065 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) |
1066 | return -EFAULT; |
1067 | } |
1068 | if (new_nodes) { |
1069 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) |
1070 | return -EFAULT; |
1071 | if (new == NULL) |
1072 | new = compat_alloc_user_space(size); |
1073 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) |
1074 | return -EFAULT; |
1075 | } |
1076 | return sys_migrate_pages(pid, nr_bits + 1, old, new); |
1077 | } |
1078 | #endif |
1079 | |
1080 | struct compat_sysinfo { |
1081 | s32 uptime; |
1082 | u32 loads[3]; |
1083 | u32 totalram; |
1084 | u32 freeram; |
1085 | u32 sharedram; |
1086 | u32 bufferram; |
1087 | u32 totalswap; |
1088 | u32 freeswap; |
1089 | u16 procs; |
1090 | u16 pad; |
1091 | u32 totalhigh; |
1092 | u32 freehigh; |
1093 | u32 mem_unit; |
1094 | char _f[20-2*sizeof(u32)-sizeof(int)]; |
1095 | }; |
1096 | |
1097 | asmlinkage long |
1098 | compat_sys_sysinfo(struct compat_sysinfo __user *info) |
1099 | { |
1100 | struct sysinfo s; |
1101 | |
1102 | do_sysinfo(&s); |
1103 | |
1104 | /* Check to see if any memory value is too large for 32-bit and scale |
1105 | * down if needed |
1106 | */ |
1107 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { |
1108 | int bitcount = 0; |
1109 | |
1110 | while (s.mem_unit < PAGE_SIZE) { |
1111 | s.mem_unit <<= 1; |
1112 | bitcount++; |
1113 | } |
1114 | |
1115 | s.totalram >>= bitcount; |
1116 | s.freeram >>= bitcount; |
1117 | s.sharedram >>= bitcount; |
1118 | s.bufferram >>= bitcount; |
1119 | s.totalswap >>= bitcount; |
1120 | s.freeswap >>= bitcount; |
1121 | s.totalhigh >>= bitcount; |
1122 | s.freehigh >>= bitcount; |
1123 | } |
1124 | |
1125 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || |
1126 | __put_user (s.uptime, &info->uptime) || |
1127 | __put_user (s.loads[0], &info->loads[0]) || |
1128 | __put_user (s.loads[1], &info->loads[1]) || |
1129 | __put_user (s.loads[2], &info->loads[2]) || |
1130 | __put_user (s.totalram, &info->totalram) || |
1131 | __put_user (s.freeram, &info->freeram) || |
1132 | __put_user (s.sharedram, &info->sharedram) || |
1133 | __put_user (s.bufferram, &info->bufferram) || |
1134 | __put_user (s.totalswap, &info->totalswap) || |
1135 | __put_user (s.freeswap, &info->freeswap) || |
1136 | __put_user (s.procs, &info->procs) || |
1137 | __put_user (s.totalhigh, &info->totalhigh) || |
1138 | __put_user (s.freehigh, &info->freehigh) || |
1139 | __put_user (s.mem_unit, &info->mem_unit)) |
1140 | return -EFAULT; |
1141 | |
1142 | return 0; |
1143 | } |
1144 | |
1145 | /* |
1146 | * Allocate user-space memory for the duration of a single system call, |
1147 | * in order to marshall parameters inside a compat thunk. |
1148 | */ |
1149 | void __user *compat_alloc_user_space(unsigned long len) |
1150 | { |
1151 | void __user *ptr; |
1152 | |
1153 | /* If len would occupy more than half of the entire compat space... */ |
1154 | if (unlikely(len > (((compat_uptr_t)~0) >> 1))) |
1155 | return NULL; |
1156 | |
1157 | ptr = arch_compat_alloc_user_space(len); |
1158 | |
1159 | if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) |
1160 | return NULL; |
1161 | |
1162 | return ptr; |
1163 | } |
1164 | EXPORT_SYMBOL_GPL(compat_alloc_user_space); |
1165 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9