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73#include <linux/syscalls.h>
74#include <linux/errno.h>
75#include <linux/fs.h>
76#include <linux/cred.h>
77#include <linux/fcntl.h>
78#include <linux/eventpoll.h>
79#include <linux/sem.h>
80#include <linux/socket.h>
81#include <linux/net.h>
82#include <linux/ipc.h>
83#include <linux/uaccess.h>
84#include <linux/slab.h>
85
86struct oldabi_stat64 {
87 unsigned long long st_dev;
88 unsigned int __pad1;
89 unsigned long __st_ino;
90 unsigned int st_mode;
91 unsigned int st_nlink;
92
93 unsigned long st_uid;
94 unsigned long st_gid;
95
96 unsigned long long st_rdev;
97 unsigned int __pad2;
98
99 long long st_size;
100 unsigned long st_blksize;
101 unsigned long long st_blocks;
102
103 unsigned long st_atime;
104 unsigned long st_atime_nsec;
105
106 unsigned long st_mtime;
107 unsigned long st_mtime_nsec;
108
109 unsigned long st_ctime;
110 unsigned long st_ctime_nsec;
111
112 unsigned long long st_ino;
113} __attribute__ ((packed,aligned(4)));
114
115static long cp_oldabi_stat64(struct kstat *stat,
116 struct oldabi_stat64 __user *statbuf)
117{
118 struct oldabi_stat64 tmp;
119
120 tmp.st_dev = huge_encode_dev(stat->dev);
121 tmp.__pad1 = 0;
122 tmp.__st_ino = stat->ino;
123 tmp.st_mode = stat->mode;
124 tmp.st_nlink = stat->nlink;
125 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
126 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
127 tmp.st_rdev = huge_encode_dev(stat->rdev);
128 tmp.st_size = stat->size;
129 tmp.st_blocks = stat->blocks;
130 tmp.__pad2 = 0;
131 tmp.st_blksize = stat->blksize;
132 tmp.st_atime = stat->atime.tv_sec;
133 tmp.st_atime_nsec = stat->atime.tv_nsec;
134 tmp.st_mtime = stat->mtime.tv_sec;
135 tmp.st_mtime_nsec = stat->mtime.tv_nsec;
136 tmp.st_ctime = stat->ctime.tv_sec;
137 tmp.st_ctime_nsec = stat->ctime.tv_nsec;
138 tmp.st_ino = stat->ino;
139 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
140}
141
142asmlinkage long sys_oabi_stat64(const char __user * filename,
143 struct oldabi_stat64 __user * statbuf)
144{
145 struct kstat stat;
146 int error = vfs_stat(filename, &stat);
147 if (!error)
148 error = cp_oldabi_stat64(&stat, statbuf);
149 return error;
150}
151
152asmlinkage long sys_oabi_lstat64(const char __user * filename,
153 struct oldabi_stat64 __user * statbuf)
154{
155 struct kstat stat;
156 int error = vfs_lstat(filename, &stat);
157 if (!error)
158 error = cp_oldabi_stat64(&stat, statbuf);
159 return error;
160}
161
162asmlinkage long sys_oabi_fstat64(unsigned long fd,
163 struct oldabi_stat64 __user * statbuf)
164{
165 struct kstat stat;
166 int error = vfs_fstat(fd, &stat);
167 if (!error)
168 error = cp_oldabi_stat64(&stat, statbuf);
169 return error;
170}
171
172asmlinkage long sys_oabi_fstatat64(int dfd,
173 const char __user *filename,
174 struct oldabi_stat64 __user *statbuf,
175 int flag)
176{
177 struct kstat stat;
178 int error;
179
180 error = vfs_fstatat(dfd, filename, &stat, flag);
181 if (error)
182 return error;
183 return cp_oldabi_stat64(&stat, statbuf);
184}
185
186struct oabi_flock64 {
187 short l_type;
188 short l_whence;
189 loff_t l_start;
190 loff_t l_len;
191 pid_t l_pid;
192} __attribute__ ((packed,aligned(4)));
193
194static long do_locks(unsigned int fd, unsigned int cmd,
195 unsigned long arg)
196{
197 struct flock64 kernel;
198 struct oabi_flock64 user;
199 mm_segment_t fs;
200 long ret;
201
202 if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
203 sizeof(user)))
204 return -EFAULT;
205 kernel.l_type = user.l_type;
206 kernel.l_whence = user.l_whence;
207 kernel.l_start = user.l_start;
208 kernel.l_len = user.l_len;
209 kernel.l_pid = user.l_pid;
210
211 fs = get_fs();
212 set_fs(KERNEL_DS);
213 ret = sys_fcntl64(fd, cmd, (unsigned long)&kernel);
214 set_fs(fs);
215
216 if (!ret && (cmd == F_GETLK64 || cmd == F_OFD_GETLK)) {
217 user.l_type = kernel.l_type;
218 user.l_whence = kernel.l_whence;
219 user.l_start = kernel.l_start;
220 user.l_len = kernel.l_len;
221 user.l_pid = kernel.l_pid;
222 if (copy_to_user((struct oabi_flock64 __user *)arg,
223 &user, sizeof(user)))
224 ret = -EFAULT;
225 }
226 return ret;
227}
228
229asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
230 unsigned long arg)
231{
232 switch (cmd) {
233 case F_OFD_GETLK:
234 case F_OFD_SETLK:
235 case F_OFD_SETLKW:
236 case F_GETLK64:
237 case F_SETLK64:
238 case F_SETLKW64:
239 return do_locks(fd, cmd, arg);
240
241 default:
242 return sys_fcntl64(fd, cmd, arg);
243 }
244}
245
246struct oabi_epoll_event {
247 __u32 events;
248 __u64 data;
249} __attribute__ ((packed,aligned(4)));
250
251#ifdef CONFIG_EPOLL
252asmlinkage long sys_oabi_epoll_ctl(int epfd, int op, int fd,
253 struct oabi_epoll_event __user *event)
254{
255 struct oabi_epoll_event user;
256 struct epoll_event kernel;
257
258 if (ep_op_has_event(op) &&
259 copy_from_user(&user, event, sizeof(user)))
260 return -EFAULT;
261
262 kernel.events = user.events;
263 kernel.data = user.data;
264
265 return do_epoll_ctl(epfd, op, fd, &kernel, false);
266}
267
268asmlinkage long sys_oabi_epoll_wait(int epfd,
269 struct oabi_epoll_event __user *events,
270 int maxevents, int timeout)
271{
272 struct epoll_event *kbuf;
273 struct oabi_epoll_event e;
274 mm_segment_t fs;
275 long ret, err, i;
276
277 if (maxevents <= 0 ||
278 maxevents > (INT_MAX/sizeof(*kbuf)) ||
279 maxevents > (INT_MAX/sizeof(*events)))
280 return -EINVAL;
281 if (!access_ok(events, sizeof(*events) * maxevents))
282 return -EFAULT;
283 kbuf = kmalloc_array(maxevents, sizeof(*kbuf), GFP_KERNEL);
284 if (!kbuf)
285 return -ENOMEM;
286 fs = get_fs();
287 set_fs(KERNEL_DS);
288 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
289 set_fs(fs);
290 err = 0;
291 for (i = 0; i < ret; i++) {
292 e.events = kbuf[i].events;
293 e.data = kbuf[i].data;
294 err = __copy_to_user(events, &e, sizeof(e));
295 if (err)
296 break;
297 events++;
298 }
299 kfree(kbuf);
300 return err ? -EFAULT : ret;
301}
302#else
303asmlinkage long sys_oabi_epoll_ctl(int epfd, int op, int fd,
304 struct oabi_epoll_event __user *event)
305{
306 return -EINVAL;
307}
308
309asmlinkage long sys_oabi_epoll_wait(int epfd,
310 struct oabi_epoll_event __user *events,
311 int maxevents, int timeout)
312{
313 return -EINVAL;
314}
315#endif
316
317struct oabi_sembuf {
318 unsigned short sem_num;
319 short sem_op;
320 short sem_flg;
321 unsigned short __pad;
322};
323
324asmlinkage long sys_oabi_semtimedop(int semid,
325 struct oabi_sembuf __user *tsops,
326 unsigned nsops,
327 const struct old_timespec32 __user *timeout)
328{
329 struct sembuf *sops;
330 struct old_timespec32 local_timeout;
331 long err;
332 int i;
333
334 if (nsops < 1 || nsops > SEMOPM)
335 return -EINVAL;
336 if (!access_ok(tsops, sizeof(*tsops) * nsops))
337 return -EFAULT;
338 sops = kmalloc_array(nsops, sizeof(*sops), GFP_KERNEL);
339 if (!sops)
340 return -ENOMEM;
341 err = 0;
342 for (i = 0; i < nsops; i++) {
343 struct oabi_sembuf osb;
344 err |= __copy_from_user(&osb, tsops, sizeof(osb));
345 sops[i].sem_num = osb.sem_num;
346 sops[i].sem_op = osb.sem_op;
347 sops[i].sem_flg = osb.sem_flg;
348 tsops++;
349 }
350 if (timeout) {
351
352 err |= copy_from_user(&local_timeout, timeout, sizeof(*timeout));
353 timeout = &local_timeout;
354 }
355 if (err) {
356 err = -EFAULT;
357 } else {
358 mm_segment_t fs = get_fs();
359 set_fs(KERNEL_DS);
360 err = sys_semtimedop_time32(semid, sops, nsops, timeout);
361 set_fs(fs);
362 }
363 kfree(sops);
364 return err;
365}
366
367asmlinkage long sys_oabi_semop(int semid, struct oabi_sembuf __user *tsops,
368 unsigned nsops)
369{
370 return sys_oabi_semtimedop(semid, tsops, nsops, NULL);
371}
372
373asmlinkage int sys_oabi_ipc(uint call, int first, int second, int third,
374 void __user *ptr, long fifth)
375{
376 switch (call & 0xffff) {
377 case SEMOP:
378 return sys_oabi_semtimedop(first,
379 (struct oabi_sembuf __user *)ptr,
380 second, NULL);
381 case SEMTIMEDOP:
382 return sys_oabi_semtimedop(first,
383 (struct oabi_sembuf __user *)ptr,
384 second,
385 (const struct old_timespec32 __user *)fifth);
386 default:
387 return sys_ipc(call, first, second, third, ptr, fifth);
388 }
389}
390
391asmlinkage long sys_oabi_bind(int fd, struct sockaddr __user *addr, int addrlen)
392{
393 sa_family_t sa_family;
394 if (addrlen == 112 &&
395 get_user(sa_family, &addr->sa_family) == 0 &&
396 sa_family == AF_UNIX)
397 addrlen = 110;
398 return sys_bind(fd, addr, addrlen);
399}
400
401asmlinkage long sys_oabi_connect(int fd, struct sockaddr __user *addr, int addrlen)
402{
403 sa_family_t sa_family;
404 if (addrlen == 112 &&
405 get_user(sa_family, &addr->sa_family) == 0 &&
406 sa_family == AF_UNIX)
407 addrlen = 110;
408 return sys_connect(fd, addr, addrlen);
409}
410
411asmlinkage long sys_oabi_sendto(int fd, void __user *buff,
412 size_t len, unsigned flags,
413 struct sockaddr __user *addr,
414 int addrlen)
415{
416 sa_family_t sa_family;
417 if (addrlen == 112 &&
418 get_user(sa_family, &addr->sa_family) == 0 &&
419 sa_family == AF_UNIX)
420 addrlen = 110;
421 return sys_sendto(fd, buff, len, flags, addr, addrlen);
422}
423
424asmlinkage long sys_oabi_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags)
425{
426 struct sockaddr __user *addr;
427 int msg_namelen;
428 sa_family_t sa_family;
429 if (msg &&
430 get_user(msg_namelen, &msg->msg_namelen) == 0 &&
431 msg_namelen == 112 &&
432 get_user(addr, &msg->msg_name) == 0 &&
433 get_user(sa_family, &addr->sa_family) == 0 &&
434 sa_family == AF_UNIX)
435 {
436
437
438
439
440
441
442
443
444
445 put_user(110, &msg->msg_namelen);
446 }
447 return sys_sendmsg(fd, msg, flags);
448}
449
450asmlinkage long sys_oabi_socketcall(int call, unsigned long __user *args)
451{
452 unsigned long r = -EFAULT, a[6];
453
454 switch (call) {
455 case SYS_BIND:
456 if (copy_from_user(a, args, 3 * sizeof(long)) == 0)
457 r = sys_oabi_bind(a[0], (struct sockaddr __user *)a[1], a[2]);
458 break;
459 case SYS_CONNECT:
460 if (copy_from_user(a, args, 3 * sizeof(long)) == 0)
461 r = sys_oabi_connect(a[0], (struct sockaddr __user *)a[1], a[2]);
462 break;
463 case SYS_SENDTO:
464 if (copy_from_user(a, args, 6 * sizeof(long)) == 0)
465 r = sys_oabi_sendto(a[0], (void __user *)a[1], a[2], a[3],
466 (struct sockaddr __user *)a[4], a[5]);
467 break;
468 case SYS_SENDMSG:
469 if (copy_from_user(a, args, 3 * sizeof(long)) == 0)
470 r = sys_oabi_sendmsg(a[0], (struct user_msghdr __user *)a[1], a[2]);
471 break;
472 default:
473 r = sys_socketcall(call, args);
474 }
475
476 return r;
477}
478