| /* |
| * linux/kernel/compat.c |
| * |
| * Kernel compatibililty routines for e.g. 32 bit syscall support |
| * on 64 bit kernels. |
| * |
| * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <linux/compat.h> |
| #include <linux/errno.h> |
| #include <linux/time.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */ |
| #include <linux/syscalls.h> |
| #include <linux/unistd.h> |
| #include <linux/security.h> |
| #include <linux/timex.h> |
| #include <linux/export.h> |
| #include <linux/migrate.h> |
| #include <linux/posix-timers.h> |
| #include <linux/times.h> |
| #include <linux/ptrace.h> |
| #include <linux/gfp.h> |
| |
| #include <asm/uaccess.h> |
| |
| /* |
| * Note that the native side is already converted to a timespec, because |
| * that's what we want anyway. |
| */ |
| static int compat_get_timeval(struct timespec *o, |
| struct compat_timeval __user *i) |
| { |
| long usec; |
| |
| if (get_user(o->tv_sec, &i->tv_sec) || |
| get_user(usec, &i->tv_usec)) |
| return -EFAULT; |
| o->tv_nsec = usec * 1000; |
| return 0; |
| } |
| |
| static int compat_put_timeval(struct compat_timeval __user *o, |
| struct timeval *i) |
| { |
| return (put_user(i->tv_sec, &o->tv_sec) || |
| put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; |
| } |
| |
| static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) |
| { |
| memset(txc, 0, sizeof(struct timex)); |
| |
| if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || |
| __get_user(txc->modes, &utp->modes) || |
| __get_user(txc->offset, &utp->offset) || |
| __get_user(txc->freq, &utp->freq) || |
| __get_user(txc->maxerror, &utp->maxerror) || |
| __get_user(txc->esterror, &utp->esterror) || |
| __get_user(txc->status, &utp->status) || |
| __get_user(txc->constant, &utp->constant) || |
| __get_user(txc->precision, &utp->precision) || |
| __get_user(txc->tolerance, &utp->tolerance) || |
| __get_user(txc->time.tv_sec, &utp->time.tv_sec) || |
| __get_user(txc->time.tv_usec, &utp->time.tv_usec) || |
| __get_user(txc->tick, &utp->tick) || |
| __get_user(txc->ppsfreq, &utp->ppsfreq) || |
| __get_user(txc->jitter, &utp->jitter) || |
| __get_user(txc->shift, &utp->shift) || |
| __get_user(txc->stabil, &utp->stabil) || |
| __get_user(txc->jitcnt, &utp->jitcnt) || |
| __get_user(txc->calcnt, &utp->calcnt) || |
| __get_user(txc->errcnt, &utp->errcnt) || |
| __get_user(txc->stbcnt, &utp->stbcnt)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) |
| { |
| if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || |
| __put_user(txc->modes, &utp->modes) || |
| __put_user(txc->offset, &utp->offset) || |
| __put_user(txc->freq, &utp->freq) || |
| __put_user(txc->maxerror, &utp->maxerror) || |
| __put_user(txc->esterror, &utp->esterror) || |
| __put_user(txc->status, &utp->status) || |
| __put_user(txc->constant, &utp->constant) || |
| __put_user(txc->precision, &utp->precision) || |
| __put_user(txc->tolerance, &utp->tolerance) || |
| __put_user(txc->time.tv_sec, &utp->time.tv_sec) || |
| __put_user(txc->time.tv_usec, &utp->time.tv_usec) || |
| __put_user(txc->tick, &utp->tick) || |
| __put_user(txc->ppsfreq, &utp->ppsfreq) || |
| __put_user(txc->jitter, &utp->jitter) || |
| __put_user(txc->shift, &utp->shift) || |
| __put_user(txc->stabil, &utp->stabil) || |
| __put_user(txc->jitcnt, &utp->jitcnt) || |
| __put_user(txc->calcnt, &utp->calcnt) || |
| __put_user(txc->errcnt, &utp->errcnt) || |
| __put_user(txc->stbcnt, &utp->stbcnt) || |
| __put_user(txc->tai, &utp->tai)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
| struct timezone __user *tz) |
| { |
| if (tv) { |
| struct timeval ktv; |
| do_gettimeofday(&ktv); |
| if (compat_put_timeval(tv, &ktv)) |
| return -EFAULT; |
| } |
| if (tz) { |
| if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, |
| struct timezone __user *tz) |
| { |
| struct timespec kts; |
| struct timezone ktz; |
| |
| if (tv) { |
| if (compat_get_timeval(&kts, tv)) |
| return -EFAULT; |
| } |
| if (tz) { |
| if (copy_from_user(&ktz, tz, sizeof(ktz))) |
| return -EFAULT; |
| } |
| |
| return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
| } |
| |
| int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
| { |
| return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || |
| __get_user(ts->tv_sec, &cts->tv_sec) || |
| __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
| } |
| |
| int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
| { |
| return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || |
| __put_user(ts->tv_sec, &cts->tv_sec) || |
| __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
| } |
| EXPORT_SYMBOL_GPL(put_compat_timespec); |
| |
| static long compat_nanosleep_restart(struct restart_block *restart) |
| { |
| struct compat_timespec __user *rmtp; |
| struct timespec rmt; |
| mm_segment_t oldfs; |
| long ret; |
| |
| restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| ret = hrtimer_nanosleep_restart(restart); |
| set_fs(oldfs); |
| |
| if (ret) { |
| rmtp = restart->nanosleep.compat_rmtp; |
| |
| if (rmtp && put_compat_timespec(&rmt, rmtp)) |
| return -EFAULT; |
| } |
| |
| return ret; |
| } |
| |
| asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
| struct compat_timespec __user *rmtp) |
| { |
| struct timespec tu, rmt; |
| mm_segment_t oldfs; |
| long ret; |
| |
| if (get_compat_timespec(&tu, rqtp)) |
| return -EFAULT; |
| |
| if (!timespec_valid(&tu)) |
| return -EINVAL; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| ret = hrtimer_nanosleep(&tu, |
| rmtp ? (struct timespec __user *)&rmt : NULL, |
| HRTIMER_MODE_REL, CLOCK_MONOTONIC); |
| set_fs(oldfs); |
| |
| if (ret) { |
| struct restart_block *restart |
| = ¤t_thread_info()->restart_block; |
| |
| restart->fn = compat_nanosleep_restart; |
| restart->nanosleep.compat_rmtp = rmtp; |
| |
| if (rmtp && put_compat_timespec(&rmt, rmtp)) |
| return -EFAULT; |
| } |
| |
| return ret; |
| } |
| |
| static inline long get_compat_itimerval(struct itimerval *o, |
| struct compat_itimerval __user *i) |
| { |
| return (!access_ok(VERIFY_READ, i, sizeof(*i)) || |
| (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | |
| __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | |
| __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | |
| __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); |
| } |
| |
| static inline long put_compat_itimerval(struct compat_itimerval __user *o, |
| struct itimerval *i) |
| { |
| return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || |
| (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | |
| __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | |
| __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | |
| __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); |
| } |
| |
| asmlinkage long compat_sys_getitimer(int which, |
| struct compat_itimerval __user *it) |
| { |
| struct itimerval kit; |
| int error; |
| |
| error = do_getitimer(which, &kit); |
| if (!error && put_compat_itimerval(it, &kit)) |
| error = -EFAULT; |
| return error; |
| } |
| |
| asmlinkage long compat_sys_setitimer(int which, |
| struct compat_itimerval __user *in, |
| struct compat_itimerval __user *out) |
| { |
| struct itimerval kin, kout; |
| int error; |
| |
| if (in) { |
| if (get_compat_itimerval(&kin, in)) |
| return -EFAULT; |
| } else |
| memset(&kin, 0, sizeof(kin)); |
| |
| error = do_setitimer(which, &kin, out ? &kout : NULL); |
| if (error || !out) |
| return error; |
| if (put_compat_itimerval(out, &kout)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
| { |
| return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); |
| } |
| |
| asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
| { |
| if (tbuf) { |
| struct tms tms; |
| struct compat_tms tmp; |
| |
| do_sys_times(&tms); |
| /* Convert our struct tms to the compat version. */ |
| tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); |
| tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); |
| tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); |
| tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); |
| if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
| return -EFAULT; |
| } |
| force_successful_syscall_return(); |
| return compat_jiffies_to_clock_t(jiffies); |
| } |
| |
| #ifdef __ARCH_WANT_SYS_SIGPENDING |
| |
| /* |
| * Assumption: old_sigset_t and compat_old_sigset_t are both |
| * types that can be passed to put_user()/get_user(). |
| */ |
| |
| asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) |
| { |
| old_sigset_t s; |
| long ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_sigpending((old_sigset_t __user *) &s); |
| set_fs(old_fs); |
| if (ret == 0) |
| ret = put_user(s, set); |
| return ret; |
| } |
| |
| #endif |
| |
| #ifdef __ARCH_WANT_SYS_SIGPROCMASK |
| |
| /* |
| * sys_sigprocmask SIG_SETMASK sets the first (compat) word of the |
| * blocked set of signals to the supplied signal set |
| */ |
| static inline void compat_sig_setmask(sigset_t *blocked, compat_sigset_word set) |
| { |
| memcpy(blocked->sig, &set, sizeof(set)); |
| } |
| |
| asmlinkage long compat_sys_sigprocmask(int how, |
| compat_old_sigset_t __user *nset, |
| compat_old_sigset_t __user *oset) |
| { |
| old_sigset_t old_set, new_set; |
| sigset_t new_blocked; |
| |
| old_set = current->blocked.sig[0]; |
| |
| if (nset) { |
| if (get_user(new_set, nset)) |
| return -EFAULT; |
| new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP)); |
| |
| new_blocked = current->blocked; |
| |
| switch (how) { |
| case SIG_BLOCK: |
| sigaddsetmask(&new_blocked, new_set); |
| break; |
| case SIG_UNBLOCK: |
| sigdelsetmask(&new_blocked, new_set); |
| break; |
| case SIG_SETMASK: |
| compat_sig_setmask(&new_blocked, new_set); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| set_current_blocked(&new_blocked); |
| } |
| |
| if (oset) { |
| if (put_user(old_set, oset)) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| #endif |
| |
| asmlinkage long compat_sys_setrlimit(unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| |
| if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || |
| __get_user(r.rlim_cur, &rlim->rlim_cur) || |
| __get_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| |
| if (r.rlim_cur == COMPAT_RLIM_INFINITY) |
| r.rlim_cur = RLIM_INFINITY; |
| if (r.rlim_max == COMPAT_RLIM_INFINITY) |
| r.rlim_max = RLIM_INFINITY; |
| return do_prlimit(current, resource, &r, NULL); |
| } |
| |
| #ifdef COMPAT_RLIM_OLD_INFINITY |
| |
| asmlinkage long compat_sys_old_getrlimit(unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| int ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_old_getrlimit(resource, &r); |
| set_fs(old_fs); |
| |
| if (!ret) { |
| if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) |
| r.rlim_cur = COMPAT_RLIM_INFINITY; |
| if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) |
| r.rlim_max = COMPAT_RLIM_INFINITY; |
| |
| if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
| __put_user(r.rlim_cur, &rlim->rlim_cur) || |
| __put_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| |
| #endif |
| |
| asmlinkage long compat_sys_getrlimit(unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| int ret; |
| |
| ret = do_prlimit(current, resource, NULL, &r); |
| if (!ret) { |
| if (r.rlim_cur > COMPAT_RLIM_INFINITY) |
| r.rlim_cur = COMPAT_RLIM_INFINITY; |
| if (r.rlim_max > COMPAT_RLIM_INFINITY) |
| r.rlim_max = COMPAT_RLIM_INFINITY; |
| |
| if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
| __put_user(r.rlim_cur, &rlim->rlim_cur) || |
| __put_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| |
| int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) |
| { |
| if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || |
| __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || |
| __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || |
| __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || |
| __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || |
| __put_user(r->ru_maxrss, &ru->ru_maxrss) || |
| __put_user(r->ru_ixrss, &ru->ru_ixrss) || |
| __put_user(r->ru_idrss, &ru->ru_idrss) || |
| __put_user(r->ru_isrss, &ru->ru_isrss) || |
| __put_user(r->ru_minflt, &ru->ru_minflt) || |
| __put_user(r->ru_majflt, &ru->ru_majflt) || |
| __put_user(r->ru_nswap, &ru->ru_nswap) || |
| __put_user(r->ru_inblock, &ru->ru_inblock) || |
| __put_user(r->ru_oublock, &ru->ru_oublock) || |
| __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || |
| __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || |
| __put_user(r->ru_nsignals, &ru->ru_nsignals) || |
| __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || |
| __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) |
| { |
| struct rusage r; |
| int ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_getrusage(who, (struct rusage __user *) &r); |
| set_fs(old_fs); |
| |
| if (ret) |
| return ret; |
| |
| if (put_compat_rusage(&r, ru)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| asmlinkage long |
| compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, |
| struct compat_rusage __user *ru) |
| { |
| if (!ru) { |
| return sys_wait4(pid, stat_addr, options, NULL); |
| } else { |
| struct rusage r; |
| int ret; |
| unsigned int status; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs (KERNEL_DS); |
| ret = sys_wait4(pid, |
| (stat_addr ? |
| (unsigned int __user *) &status : NULL), |
| options, (struct rusage __user *) &r); |
| set_fs (old_fs); |
| |
| if (ret > 0) { |
| if (put_compat_rusage(&r, ru)) |
| return -EFAULT; |
| if (stat_addr && put_user(status, stat_addr)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| } |
| |
| asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, |
| struct compat_siginfo __user *uinfo, int options, |
| struct compat_rusage __user *uru) |
| { |
| siginfo_t info; |
| struct rusage ru; |
| long ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| memset(&info, 0, sizeof(info)); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, |
| uru ? (struct rusage __user *)&ru : NULL); |
| set_fs(old_fs); |
| |
| if ((ret < 0) || (info.si_signo == 0)) |
| return ret; |
| |
| if (uru) { |
| ret = put_compat_rusage(&ru, uru); |
| if (ret) |
| return ret; |
| } |
| |
| BUG_ON(info.si_code & __SI_MASK); |
| info.si_code |= __SI_CHLD; |
| return copy_siginfo_to_user32(uinfo, &info); |
| } |
| |
| static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
| unsigned len, struct cpumask *new_mask) |
| { |
| unsigned long *k; |
| |
| if (len < cpumask_size()) |
| memset(new_mask, 0, cpumask_size()); |
| else if (len > cpumask_size()) |
| len = cpumask_size(); |
| |
| k = cpumask_bits(new_mask); |
| return compat_get_bitmap(k, user_mask_ptr, len * 8); |
| } |
| |
| asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, |
| unsigned int len, |
| compat_ulong_t __user *user_mask_ptr) |
| { |
| cpumask_var_t new_mask; |
| int retval; |
| |
| if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
| return -ENOMEM; |
| |
| retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
| if (retval) |
| goto out; |
| |
| retval = sched_setaffinity(pid, new_mask); |
| out: |
| free_cpumask_var(new_mask); |
| return retval; |
| } |
| |
| asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, |
| compat_ulong_t __user *user_mask_ptr) |
| { |
| int ret; |
| cpumask_var_t mask; |
| |
| if ((len * BITS_PER_BYTE) < nr_cpu_ids) |
| return -EINVAL; |
| if (len & (sizeof(compat_ulong_t)-1)) |
| return -EINVAL; |
| |
| if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
| return -ENOMEM; |
| |
| ret = sched_getaffinity(pid, mask); |
| if (ret == 0) { |
| size_t retlen = min_t(size_t, len, cpumask_size()); |
| |
| if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) |
| ret = -EFAULT; |
| else |
| ret = retlen; |
| } |
| free_cpumask_var(mask); |
| |
| return ret; |
| } |
| |
| int get_compat_itimerspec(struct itimerspec *dst, |
| const struct compat_itimerspec __user *src) |
| { |
| if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
| get_compat_timespec(&dst->it_value, &src->it_value)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
| const struct itimerspec *src) |
| { |
| if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
| put_compat_timespec(&src->it_value, &dst->it_value)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| long compat_sys_timer_create(clockid_t which_clock, |
| struct compat_sigevent __user *timer_event_spec, |
| timer_t __user *created_timer_id) |
| { |
| struct sigevent __user *event = NULL; |
| |
| if (timer_event_spec) { |
| struct sigevent kevent; |
| |
| event = compat_alloc_user_space(sizeof(*event)); |
| if (get_compat_sigevent(&kevent, timer_event_spec) || |
| copy_to_user(event, &kevent, sizeof(*event))) |
| return -EFAULT; |
| } |
| |
| return sys_timer_create(which_clock, event, created_timer_id); |
| } |
| |
| long compat_sys_timer_settime(timer_t timer_id, int flags, |
| struct compat_itimerspec __user *new, |
| struct compat_itimerspec __user *old) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct itimerspec newts, oldts; |
| |
| if (!new) |
| return -EINVAL; |
| if (get_compat_itimerspec(&newts, new)) |
| return -EFAULT; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_timer_settime(timer_id, flags, |
| (struct itimerspec __user *) &newts, |
| (struct itimerspec __user *) &oldts); |
| set_fs(oldfs); |
| if (!err && old && put_compat_itimerspec(old, &oldts)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_timer_gettime(timer_t timer_id, |
| struct compat_itimerspec __user *setting) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct itimerspec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_timer_gettime(timer_id, |
| (struct itimerspec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && put_compat_itimerspec(setting, &ts)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_clock_settime(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| if (get_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_settime(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| return err; |
| } |
| |
| long compat_sys_clock_gettime(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_gettime(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && put_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_clock_adjtime(clockid_t which_clock, |
| struct compat_timex __user *utp) |
| { |
| struct timex txc; |
| mm_segment_t oldfs; |
| int err, ret; |
| |
| err = compat_get_timex(&txc, utp); |
| if (err) |
| return err; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); |
| set_fs(oldfs); |
| |
| err = compat_put_timex(utp, &txc); |
| if (err) |
| return err; |
| |
| return ret; |
| } |
| |
| long compat_sys_clock_getres(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_getres(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && tp && put_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| return err; |
| } |
| |
| static long compat_clock_nanosleep_restart(struct restart_block *restart) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec tu; |
| struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
| |
| restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = clock_nanosleep_restart(restart); |
| set_fs(oldfs); |
| |
| if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
| put_compat_timespec(&tu, rmtp)) |
| return -EFAULT; |
| |
| if (err == -ERESTART_RESTARTBLOCK) { |
| restart->fn = compat_clock_nanosleep_restart; |
| restart->nanosleep.compat_rmtp = rmtp; |
| } |
| return err; |
| } |
| |
| long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
| struct compat_timespec __user *rqtp, |
| struct compat_timespec __user *rmtp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec in, out; |
| struct restart_block *restart; |
| |
| if (get_compat_timespec(&in, rqtp)) |
| return -EFAULT; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_nanosleep(which_clock, flags, |
| (struct timespec __user *) &in, |
| (struct timespec __user *) &out); |
| set_fs(oldfs); |
| |
| if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
| put_compat_timespec(&out, rmtp)) |
| return -EFAULT; |
| |
| if (err == -ERESTART_RESTARTBLOCK) { |
| restart = ¤t_thread_info()->restart_block; |
| restart->fn = compat_clock_nanosleep_restart; |
| restart->nanosleep.compat_rmtp = rmtp; |
| } |
| return err; |
| } |
| |
| /* |
| * We currently only need the following fields from the sigevent |
| * structure: sigev_value, sigev_signo, sig_notify and (sometimes |
| * sigev_notify_thread_id). The others are handled in user mode. |
| * We also assume that copying sigev_value.sival_int is sufficient |
| * to keep all the bits of sigev_value.sival_ptr intact. |
| */ |
| int get_compat_sigevent(struct sigevent *event, |
| const struct compat_sigevent __user *u_event) |
| { |
| memset(event, 0, sizeof(*event)); |
| return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
| __get_user(event->sigev_value.sival_int, |
| &u_event->sigev_value.sival_int) || |
| __get_user(event->sigev_signo, &u_event->sigev_signo) || |
| __get_user(event->sigev_notify, &u_event->sigev_notify) || |
| __get_user(event->sigev_notify_thread_id, |
| &u_event->sigev_notify_thread_id)) |
| ? -EFAULT : 0; |
| } |
| |
| long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
| unsigned long bitmap_size) |
| { |
| int i, j; |
| unsigned long m; |
| compat_ulong_t um; |
| unsigned long nr_compat_longs; |
| |
| /* align bitmap up to nearest compat_long_t boundary */ |
| bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
| |
| if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) |
| return -EFAULT; |
| |
| nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
| |
| for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
| m = 0; |
| |
| for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
| /* |
| * We dont want to read past the end of the userspace |
| * bitmap. We must however ensure the end of the |
| * kernel bitmap is zeroed. |
| */ |
| if (nr_compat_longs-- > 0) { |
| if (__get_user(um, umask)) |
| return -EFAULT; |
| } else { |
| um = 0; |
| } |
| |
| umask++; |
| m |= (long)um << (j * BITS_PER_COMPAT_LONG); |
| } |
| *mask++ = m; |
| } |
| |
| return 0; |
| } |
| |
| long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, |
| unsigned long bitmap_size) |
| { |
| int i, j; |
| unsigned long m; |
| compat_ulong_t um; |
| unsigned long nr_compat_longs; |
| |
| /* align bitmap up to nearest compat_long_t boundary */ |
| bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
| |
| if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) |
| return -EFAULT; |
| |
| nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
| |
| for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
| m = *mask++; |
| |
| for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
| um = m; |
| |
| /* |
| * We dont want to write past the end of the userspace |
| * bitmap. |
| */ |
| if (nr_compat_longs-- > 0) { |
| if (__put_user(um, umask)) |
| return -EFAULT; |
| } |
| |
| umask++; |
| m >>= 4*sizeof(um); |
| m >>= 4*sizeof(um); |
| } |
| } |
| |
| return 0; |
| } |
| |
| void |
| sigset_from_compat (sigset_t *set, compat_sigset_t *compat) |
| { |
| switch (_NSIG_WORDS) { |
| case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
| case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); |
| case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); |
| case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
| } |
| } |
| EXPORT_SYMBOL_GPL(sigset_from_compat); |
| |
| asmlinkage long |
| compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, |
| struct compat_siginfo __user *uinfo, |
| struct compat_timespec __user *uts, compat_size_t sigsetsize) |
| { |
| compat_sigset_t s32; |
| sigset_t s; |
| struct timespec t; |
| siginfo_t info; |
| long ret; |
| |
| if (sigsetsize != sizeof(sigset_t)) |
| return -EINVAL; |
| |
| if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) |
| return -EFAULT; |
| sigset_from_compat(&s, &s32); |
| |
| if (uts) { |
| if (get_compat_timespec(&t, uts)) |
| return -EFAULT; |
| } |
| |
| ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
| |
| if (ret > 0 && uinfo) { |
| if (copy_siginfo_to_user32(uinfo, &info)) |
| ret = -EFAULT; |
| } |
| |
| return ret; |
| |
| } |
| |
| asmlinkage long |
| compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, |
| struct compat_siginfo __user *uinfo) |
| { |
| siginfo_t info; |
| |
| if (copy_siginfo_from_user32(&info, uinfo)) |
| return -EFAULT; |
| return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); |
| } |
| |
| #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
| |
| /* compat_time_t is a 32 bit "long" and needs to get converted. */ |
| |
| asmlinkage long compat_sys_time(compat_time_t __user * tloc) |
| { |
| compat_time_t i; |
| struct timeval tv; |
| |
| do_gettimeofday(&tv); |
| i = tv.tv_sec; |
| |
| if (tloc) { |
| if (put_user(i,tloc)) |
| return -EFAULT; |
| } |
| force_successful_syscall_return(); |
| return i; |
| } |
| |
| asmlinkage long compat_sys_stime(compat_time_t __user *tptr) |
| { |
| struct timespec tv; |
| int err; |
| |
| if (get_user(tv.tv_sec, tptr)) |
| return -EFAULT; |
| |
| tv.tv_nsec = 0; |
| |
| err = security_settime(&tv, NULL); |
| if (err) |
| return err; |
| |
| do_settimeofday(&tv); |
| return 0; |
| } |
| |
| #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
| |
| #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND |
| asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) |
| { |
| sigset_t newset; |
| compat_sigset_t newset32; |
| |
| /* XXX: Don't preclude handling different sized sigset_t's. */ |
| if (sigsetsize != sizeof(sigset_t)) |
| return -EINVAL; |
| |
| if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) |
| return -EFAULT; |
| sigset_from_compat(&newset, &newset32); |
| sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| |
| current->saved_sigmask = current->blocked; |
| set_current_blocked(&newset); |
| |
| current->state = TASK_INTERRUPTIBLE; |
| schedule(); |
| set_restore_sigmask(); |
| return -ERESTARTNOHAND; |
| } |
| #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
| |
| asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
| { |
| struct timex txc; |
| int err, ret; |
| |
| err = compat_get_timex(&txc, utp); |
| if (err) |
| return err; |
| |
| ret = do_adjtimex(&txc); |
| |
| err = compat_put_timex(utp, &txc); |
| if (err) |
| return err; |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_NUMA |
| asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
| compat_uptr_t __user *pages32, |
| const int __user *nodes, |
| int __user *status, |
| int flags) |
| { |
| const void __user * __user *pages; |
| int i; |
| |
| pages = compat_alloc_user_space(nr_pages * sizeof(void *)); |
| for (i = 0; i < nr_pages; i++) { |
| compat_uptr_t p; |
| |
| if (get_user(p, pages32 + i) || |
| put_user(compat_ptr(p), pages + i)) |
| return -EFAULT; |
| } |
| return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); |
| } |
| |
| asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, |
| compat_ulong_t maxnode, |
| const compat_ulong_t __user *old_nodes, |
| const compat_ulong_t __user *new_nodes) |
| { |
| unsigned long __user *old = NULL; |
| unsigned long __user *new = NULL; |
| nodemask_t tmp_mask; |
| unsigned long nr_bits; |
| unsigned long size; |
| |
| nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); |
| size = ALIGN(nr_bits, BITS_PER_LONG) / 8; |
| if (old_nodes) { |
| if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) |
| return -EFAULT; |
| old = compat_alloc_user_space(new_nodes ? size * 2 : size); |
| if (new_nodes) |
| new = old + size / sizeof(unsigned long); |
| if (copy_to_user(old, nodes_addr(tmp_mask), size)) |
| return -EFAULT; |
| } |
| if (new_nodes) { |
| if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) |
| return -EFAULT; |
| if (new == NULL) |
| new = compat_alloc_user_space(size); |
| if (copy_to_user(new, nodes_addr(tmp_mask), size)) |
| return -EFAULT; |
| } |
| return sys_migrate_pages(pid, nr_bits + 1, old, new); |
| } |
| #endif |
| |
| struct compat_sysinfo { |
| s32 uptime; |
| u32 loads[3]; |
| u32 totalram; |
| u32 freeram; |
| u32 sharedram; |
| u32 bufferram; |
| u32 totalswap; |
| u32 freeswap; |
| u16 procs; |
| u16 pad; |
| u32 totalhigh; |
| u32 freehigh; |
| u32 mem_unit; |
| char _f[20-2*sizeof(u32)-sizeof(int)]; |
| }; |
| |
| asmlinkage long |
| compat_sys_sysinfo(struct compat_sysinfo __user *info) |
| { |
| struct sysinfo s; |
| |
| do_sysinfo(&s); |
| |
| /* Check to see if any memory value is too large for 32-bit and scale |
| * down if needed |
| */ |
| if ((s.totalram >> 32) || (s.totalswap >> 32)) { |
| int bitcount = 0; |
| |
| while (s.mem_unit < PAGE_SIZE) { |
| s.mem_unit <<= 1; |
| bitcount++; |
| } |
| |
| s.totalram >>= bitcount; |
| s.freeram >>= bitcount; |
| s.sharedram >>= bitcount; |
| s.bufferram >>= bitcount; |
| s.totalswap >>= bitcount; |
| s.freeswap >>= bitcount; |
| s.totalhigh >>= bitcount; |
| s.freehigh >>= bitcount; |
| } |
| |
| if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || |
| __put_user (s.uptime, &info->uptime) || |
| __put_user (s.loads[0], &info->loads[0]) || |
| __put_user (s.loads[1], &info->loads[1]) || |
| __put_user (s.loads[2], &info->loads[2]) || |
| __put_user (s.totalram, &info->totalram) || |
| __put_user (s.freeram, &info->freeram) || |
| __put_user (s.sharedram, &info->sharedram) || |
| __put_user (s.bufferram, &info->bufferram) || |
| __put_user (s.totalswap, &info->totalswap) || |
| __put_user (s.freeswap, &info->freeswap) || |
| __put_user (s.procs, &info->procs) || |
| __put_user (s.totalhigh, &info->totalhigh) || |
| __put_user (s.freehigh, &info->freehigh) || |
| __put_user (s.mem_unit, &info->mem_unit)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* |
| * Allocate user-space memory for the duration of a single system call, |
| * in order to marshall parameters inside a compat thunk. |
| */ |
| void __user *compat_alloc_user_space(unsigned long len) |
| { |
| void __user *ptr; |
| |
| /* If len would occupy more than half of the entire compat space... */ |
| if (unlikely(len > (((compat_uptr_t)~0) >> 1))) |
| return NULL; |
| |
| ptr = arch_compat_alloc_user_space(len); |
| |
| if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) |
| return NULL; |
| |
| return ptr; |
| } |
| EXPORT_SYMBOL_GPL(compat_alloc_user_space); |