mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 11:16:41 +07:00
51410d3c53
I have no idea how a bug like this lasted so long. Anyways, obvious memset()'ing of incorrect pointer. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
861 lines
21 KiB
C
861 lines
21 KiB
C
/*
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* linux/kernel/compat.c
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*
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* Kernel compatibililty routines for e.g. 32 bit syscall support
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* on 64 bit kernels.
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*
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* Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <linux/compat.h>
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#include <linux/errno.h>
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#include <linux/time.h>
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#include <linux/signal.h>
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#include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */
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#include <linux/futex.h> /* for FUTEX_WAIT */
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#include <linux/syscalls.h>
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#include <linux/unistd.h>
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#include <linux/security.h>
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#include <asm/uaccess.h>
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#include <asm/bug.h>
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int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
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{
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return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
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__get_user(ts->tv_sec, &cts->tv_sec) ||
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__get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
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}
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int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
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{
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return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) ||
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__put_user(ts->tv_sec, &cts->tv_sec) ||
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__put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
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}
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static long compat_nanosleep_restart(struct restart_block *restart)
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{
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unsigned long expire = restart->arg0, now = jiffies;
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struct compat_timespec __user *rmtp;
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/* Did it expire while we handled signals? */
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if (!time_after(expire, now))
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return 0;
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current->state = TASK_INTERRUPTIBLE;
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expire = schedule_timeout(expire - now);
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if (expire == 0)
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return 0;
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rmtp = (struct compat_timespec __user *)restart->arg1;
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if (rmtp) {
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struct compat_timespec ct;
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struct timespec t;
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jiffies_to_timespec(expire, &t);
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ct.tv_sec = t.tv_sec;
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ct.tv_nsec = t.tv_nsec;
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if (copy_to_user(rmtp, &ct, sizeof(ct)))
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return -EFAULT;
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}
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/* The 'restart' block is already filled in */
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return -ERESTART_RESTARTBLOCK;
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}
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asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
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struct compat_timespec __user *rmtp)
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{
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struct timespec t;
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struct restart_block *restart;
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unsigned long expire;
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if (get_compat_timespec(&t, rqtp))
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return -EFAULT;
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if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0))
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return -EINVAL;
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expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec);
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current->state = TASK_INTERRUPTIBLE;
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expire = schedule_timeout(expire);
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if (expire == 0)
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return 0;
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if (rmtp) {
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jiffies_to_timespec(expire, &t);
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if (put_compat_timespec(&t, rmtp))
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return -EFAULT;
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}
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restart = ¤t_thread_info()->restart_block;
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restart->fn = compat_nanosleep_restart;
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restart->arg0 = jiffies + expire;
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restart->arg1 = (unsigned long) rmtp;
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return -ERESTART_RESTARTBLOCK;
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}
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static inline long get_compat_itimerval(struct itimerval *o,
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struct compat_itimerval __user *i)
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{
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return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
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(__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
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__get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
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__get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
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__get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
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}
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static inline long put_compat_itimerval(struct compat_itimerval __user *o,
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struct itimerval *i)
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{
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return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
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(__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
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__put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
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__put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
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__put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
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}
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asmlinkage long compat_sys_getitimer(int which,
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struct compat_itimerval __user *it)
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{
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struct itimerval kit;
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int error;
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error = do_getitimer(which, &kit);
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if (!error && put_compat_itimerval(it, &kit))
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error = -EFAULT;
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return error;
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}
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asmlinkage long compat_sys_setitimer(int which,
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struct compat_itimerval __user *in,
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struct compat_itimerval __user *out)
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{
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struct itimerval kin, kout;
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int error;
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if (in) {
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if (get_compat_itimerval(&kin, in))
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return -EFAULT;
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} else
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memset(&kin, 0, sizeof(kin));
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error = do_setitimer(which, &kin, out ? &kout : NULL);
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if (error || !out)
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return error;
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if (put_compat_itimerval(out, &kout))
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return -EFAULT;
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return 0;
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}
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asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
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{
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/*
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* In the SMP world we might just be unlucky and have one of
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* the times increment as we use it. Since the value is an
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* atomically safe type this is just fine. Conceptually its
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* as if the syscall took an instant longer to occur.
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*/
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if (tbuf) {
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struct compat_tms tmp;
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struct task_struct *tsk = current;
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struct task_struct *t;
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cputime_t utime, stime, cutime, cstime;
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read_lock(&tasklist_lock);
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utime = tsk->signal->utime;
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stime = tsk->signal->stime;
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t = tsk;
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do {
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utime = cputime_add(utime, t->utime);
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stime = cputime_add(stime, t->stime);
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t = next_thread(t);
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} while (t != tsk);
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/*
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* While we have tasklist_lock read-locked, no dying thread
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* can be updating current->signal->[us]time. Instead,
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* we got their counts included in the live thread loop.
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* However, another thread can come in right now and
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* do a wait call that updates current->signal->c[us]time.
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* To make sure we always see that pair updated atomically,
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* we take the siglock around fetching them.
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*/
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spin_lock_irq(&tsk->sighand->siglock);
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cutime = tsk->signal->cutime;
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cstime = tsk->signal->cstime;
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spin_unlock_irq(&tsk->sighand->siglock);
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read_unlock(&tasklist_lock);
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tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime));
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tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime));
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tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime));
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tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime));
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if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
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return -EFAULT;
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}
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return compat_jiffies_to_clock_t(jiffies);
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}
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/*
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* Assumption: old_sigset_t and compat_old_sigset_t are both
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* types that can be passed to put_user()/get_user().
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*/
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asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
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{
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old_sigset_t s;
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long ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_sigpending((old_sigset_t __user *) &s);
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set_fs(old_fs);
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if (ret == 0)
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ret = put_user(s, set);
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return ret;
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}
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asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set,
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compat_old_sigset_t __user *oset)
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{
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old_sigset_t s;
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long ret;
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mm_segment_t old_fs;
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if (set && get_user(s, set))
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return -EFAULT;
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_sigprocmask(how,
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set ? (old_sigset_t __user *) &s : NULL,
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oset ? (old_sigset_t __user *) &s : NULL);
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set_fs(old_fs);
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if (ret == 0)
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if (oset)
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ret = put_user(s, oset);
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return ret;
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}
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#ifdef CONFIG_FUTEX
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asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, int val,
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struct compat_timespec __user *utime, u32 __user *uaddr2,
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int val3)
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{
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struct timespec t;
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unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
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int val2 = 0;
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if ((op == FUTEX_WAIT) && utime) {
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if (get_compat_timespec(&t, utime))
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return -EFAULT;
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timeout = timespec_to_jiffies(&t) + 1;
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}
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if (op >= FUTEX_REQUEUE)
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val2 = (int) (unsigned long) utime;
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return do_futex((unsigned long)uaddr, op, val, timeout,
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(unsigned long)uaddr2, val2, val3);
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}
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#endif
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asmlinkage long compat_sys_setrlimit(unsigned int resource,
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struct compat_rlimit __user *rlim)
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{
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struct rlimit r;
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int ret;
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mm_segment_t old_fs = get_fs ();
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if (resource >= RLIM_NLIMITS)
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return -EINVAL;
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if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
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__get_user(r.rlim_cur, &rlim->rlim_cur) ||
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__get_user(r.rlim_max, &rlim->rlim_max))
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return -EFAULT;
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if (r.rlim_cur == COMPAT_RLIM_INFINITY)
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r.rlim_cur = RLIM_INFINITY;
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if (r.rlim_max == COMPAT_RLIM_INFINITY)
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r.rlim_max = RLIM_INFINITY;
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set_fs(KERNEL_DS);
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ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
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set_fs(old_fs);
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return ret;
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}
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#ifdef COMPAT_RLIM_OLD_INFINITY
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asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
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struct compat_rlimit __user *rlim)
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{
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struct rlimit r;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_old_getrlimit(resource, &r);
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set_fs(old_fs);
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if (!ret) {
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if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
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r.rlim_cur = COMPAT_RLIM_INFINITY;
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if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
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r.rlim_max = COMPAT_RLIM_INFINITY;
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if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
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__put_user(r.rlim_cur, &rlim->rlim_cur) ||
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__put_user(r.rlim_max, &rlim->rlim_max))
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return -EFAULT;
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}
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return ret;
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}
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#endif
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asmlinkage long compat_sys_getrlimit (unsigned int resource,
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struct compat_rlimit __user *rlim)
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{
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struct rlimit r;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
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set_fs(old_fs);
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if (!ret) {
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if (r.rlim_cur > COMPAT_RLIM_INFINITY)
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r.rlim_cur = COMPAT_RLIM_INFINITY;
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if (r.rlim_max > COMPAT_RLIM_INFINITY)
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r.rlim_max = COMPAT_RLIM_INFINITY;
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if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
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__put_user(r.rlim_cur, &rlim->rlim_cur) ||
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__put_user(r.rlim_max, &rlim->rlim_max))
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return -EFAULT;
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}
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return ret;
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}
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int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
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{
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if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
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__put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
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__put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
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__put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
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__put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
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__put_user(r->ru_maxrss, &ru->ru_maxrss) ||
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__put_user(r->ru_ixrss, &ru->ru_ixrss) ||
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__put_user(r->ru_idrss, &ru->ru_idrss) ||
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__put_user(r->ru_isrss, &ru->ru_isrss) ||
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__put_user(r->ru_minflt, &ru->ru_minflt) ||
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__put_user(r->ru_majflt, &ru->ru_majflt) ||
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__put_user(r->ru_nswap, &ru->ru_nswap) ||
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__put_user(r->ru_inblock, &ru->ru_inblock) ||
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__put_user(r->ru_oublock, &ru->ru_oublock) ||
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__put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
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__put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
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__put_user(r->ru_nsignals, &ru->ru_nsignals) ||
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__put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
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__put_user(r->ru_nivcsw, &ru->ru_nivcsw))
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return -EFAULT;
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return 0;
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}
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asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
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{
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struct rusage r;
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int ret;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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ret = sys_getrusage(who, (struct rusage __user *) &r);
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set_fs(old_fs);
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if (ret)
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return ret;
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if (put_compat_rusage(&r, ru))
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return -EFAULT;
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return 0;
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}
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asmlinkage long
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compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
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struct compat_rusage __user *ru)
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{
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if (!ru) {
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return sys_wait4(pid, stat_addr, options, NULL);
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} else {
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struct rusage r;
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int ret;
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unsigned int status;
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mm_segment_t old_fs = get_fs();
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set_fs (KERNEL_DS);
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ret = sys_wait4(pid,
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(stat_addr ?
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(unsigned int __user *) &status : NULL),
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options, (struct rusage __user *) &r);
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set_fs (old_fs);
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if (ret > 0) {
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if (put_compat_rusage(&r, ru))
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return -EFAULT;
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if (stat_addr && put_user(status, stat_addr))
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return -EFAULT;
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}
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return ret;
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}
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}
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asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
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struct compat_siginfo __user *uinfo, int options,
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struct compat_rusage __user *uru)
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{
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siginfo_t info;
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struct rusage ru;
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long ret;
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mm_segment_t old_fs = get_fs();
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memset(&info, 0, sizeof(info));
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set_fs(KERNEL_DS);
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ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
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uru ? (struct rusage __user *)&ru : NULL);
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set_fs(old_fs);
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if ((ret < 0) || (info.si_signo == 0))
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return ret;
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if (uru) {
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ret = put_compat_rusage(&ru, uru);
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if (ret)
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return ret;
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}
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BUG_ON(info.si_code & __SI_MASK);
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info.si_code |= __SI_CHLD;
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return copy_siginfo_to_user32(uinfo, &info);
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}
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static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
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unsigned len, cpumask_t *new_mask)
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{
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unsigned long *k;
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if (len < sizeof(cpumask_t))
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memset(new_mask, 0, sizeof(cpumask_t));
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else if (len > sizeof(cpumask_t))
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len = sizeof(cpumask_t);
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k = cpus_addr(*new_mask);
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return compat_get_bitmap(k, user_mask_ptr, len * 8);
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}
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asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
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unsigned int len,
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compat_ulong_t __user *user_mask_ptr)
|
|
{
|
|
cpumask_t new_mask;
|
|
int retval;
|
|
|
|
retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask);
|
|
if (retval)
|
|
return retval;
|
|
|
|
return sched_setaffinity(pid, new_mask);
|
|
}
|
|
|
|
asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
|
|
compat_ulong_t __user *user_mask_ptr)
|
|
{
|
|
int ret;
|
|
cpumask_t mask;
|
|
unsigned long *k;
|
|
unsigned int min_length = sizeof(cpumask_t);
|
|
|
|
if (NR_CPUS <= BITS_PER_COMPAT_LONG)
|
|
min_length = sizeof(compat_ulong_t);
|
|
|
|
if (len < min_length)
|
|
return -EINVAL;
|
|
|
|
ret = sched_getaffinity(pid, &mask);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
k = cpus_addr(mask);
|
|
ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return min_length;
|
|
}
|
|
|
|
static int get_compat_itimerspec(struct itimerspec *dst,
|
|
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;
|
|
}
|
|
|
|
static int put_compat_itimerspec(struct compat_itimerspec __user *dst,
|
|
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_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_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;
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
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;
|
|
}
|
|
|
|
/* timer_create is architecture specific because it needs sigevent conversion */
|
|
|
|
long compat_get_bitmap(unsigned long *mask, 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) {
|
|
#if defined (__COMPAT_ENDIAN_SWAP__)
|
|
case 4: set->sig[3] = compat->sig[7] | (((long)compat->sig[6]) << 32 );
|
|
case 3: set->sig[2] = compat->sig[5] | (((long)compat->sig[4]) << 32 );
|
|
case 2: set->sig[1] = compat->sig[3] | (((long)compat->sig[2]) << 32 );
|
|
case 1: set->sig[0] = compat->sig[1] | (((long)compat->sig[0]) << 32 );
|
|
#else
|
|
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 );
|
|
#endif
|
|
}
|
|
}
|
|
|
|
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;
|
|
int sig;
|
|
struct timespec t;
|
|
siginfo_t info;
|
|
long ret, timeout = 0;
|
|
|
|
if (sigsetsize != sizeof(sigset_t))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
|
|
return -EFAULT;
|
|
sigset_from_compat(&s, &s32);
|
|
sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
|
|
signotset(&s);
|
|
|
|
if (uts) {
|
|
if (get_compat_timespec (&t, uts))
|
|
return -EFAULT;
|
|
if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
|
|
|| t.tv_sec < 0)
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
|
sig = dequeue_signal(current, &s, &info);
|
|
if (!sig) {
|
|
timeout = MAX_SCHEDULE_TIMEOUT;
|
|
if (uts)
|
|
timeout = timespec_to_jiffies(&t)
|
|
+(t.tv_sec || t.tv_nsec);
|
|
if (timeout) {
|
|
current->real_blocked = current->blocked;
|
|
sigandsets(¤t->blocked, ¤t->blocked, &s);
|
|
|
|
recalc_sigpending();
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
current->state = TASK_INTERRUPTIBLE;
|
|
timeout = schedule_timeout(timeout);
|
|
|
|
spin_lock_irq(¤t->sighand->siglock);
|
|
sig = dequeue_signal(current, &s, &info);
|
|
current->blocked = current->real_blocked;
|
|
siginitset(¤t->real_blocked, 0);
|
|
recalc_sigpending();
|
|
}
|
|
}
|
|
spin_unlock_irq(¤t->sighand->siglock);
|
|
|
|
if (sig) {
|
|
ret = sig;
|
|
if (uinfo) {
|
|
if (copy_siginfo_to_user32(uinfo, &info))
|
|
ret = -EFAULT;
|
|
}
|
|
}else {
|
|
ret = timeout?-EINTR:-EAGAIN;
|
|
}
|
|
return ret;
|
|
|
|
}
|
|
|
|
#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))
|
|
i = -EFAULT;
|
|
}
|
|
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 */
|