#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/mman.h>
-#include <linux/smp_lock.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/prctl.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/seccomp.h>
#include <linux/cpu.h>
+#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/fs_struct.h>
+#include <linux/gfp.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
if (niceval > 19)
niceval = 19;
+ rcu_read_lock();
read_lock(&tasklist_lock);
switch (which) {
case PRIO_PROCESS:
!(user = find_user(who)))
goto out_unlock; /* No processes for this user */
- do_each_thread(g, p)
+ do_each_thread(g, p) {
if (__task_cred(p)->uid == who)
error = set_one_prio(p, niceval, error);
- while_each_thread(g, p);
+ } while_each_thread(g, p);
if (who != cred->uid)
free_uid(user); /* For find_user() */
break;
}
out_unlock:
read_unlock(&tasklist_lock);
+ rcu_read_unlock();
out:
return error;
}
if (which > PRIO_USER || which < PRIO_PROCESS)
return -EINVAL;
+ rcu_read_lock();
read_lock(&tasklist_lock);
switch (which) {
case PRIO_PROCESS:
!(user = find_user(who)))
goto out_unlock; /* No processes for this user */
- do_each_thread(g, p)
+ do_each_thread(g, p) {
if (__task_cred(p)->uid == who) {
niceval = 20 - task_nice(p);
if (niceval > retval)
retval = niceval;
}
- while_each_thread(g, p);
+ } while_each_thread(g, p);
if (who != cred->uid)
free_uid(user); /* for find_user() */
break;
}
out_unlock:
read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
machine_power_off();
}
EXPORT_SYMBOL_GPL(kernel_power_off);
+
+static DEFINE_MUTEX(reboot_mutex);
+
/*
* Reboot system call: for obvious reasons only root may call it,
* and even root needs to set up some magic numbers in the registers
if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
cmd = LINUX_REBOOT_CMD_HALT;
- lock_kernel();
+ mutex_lock(&reboot_mutex);
switch (cmd) {
case LINUX_REBOOT_CMD_RESTART:
kernel_restart(NULL);
case LINUX_REBOOT_CMD_HALT:
kernel_halt();
- unlock_kernel();
do_exit(0);
panic("cannot halt");
case LINUX_REBOOT_CMD_POWER_OFF:
kernel_power_off();
- unlock_kernel();
do_exit(0);
break;
case LINUX_REBOOT_CMD_RESTART2:
if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) {
- unlock_kernel();
- return -EFAULT;
+ ret = -EFAULT;
+ break;
}
buffer[sizeof(buffer) - 1] = '\0';
ret = -EINVAL;
break;
}
- unlock_kernel();
+ mutex_unlock(&reboot_mutex);
return ret;
}
return -ENOMEM;
old = current_cred();
- retval = security_task_setgid(rgid, egid, (gid_t)-1, LSM_SETID_RE);
- if (retval)
- goto error;
-
retval = -EPERM;
if (rgid != (gid_t) -1) {
if (old->gid == rgid ||
return -ENOMEM;
old = current_cred();
- retval = security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_ID);
- if (retval)
- goto error;
-
retval = -EPERM;
if (capable(CAP_SETGID))
new->gid = new->egid = new->sgid = new->fsgid = gid;
if (!new_user)
return -EAGAIN;
- if (!task_can_switch_user(new_user, current)) {
- free_uid(new_user);
- return -EINVAL;
- }
-
- if (atomic_read(&new_user->processes) >=
- current->signal->rlim[RLIMIT_NPROC].rlim_cur &&
+ if (atomic_read(&new_user->processes) >= rlimit(RLIMIT_NPROC) &&
new_user != INIT_USER) {
free_uid(new_user);
return -EAGAIN;
return -ENOMEM;
old = current_cred();
- retval = security_task_setuid(ruid, euid, (uid_t)-1, LSM_SETID_RE);
- if (retval)
- goto error;
-
retval = -EPERM;
if (ruid != (uid_t) -1) {
new->uid = ruid;
return -ENOMEM;
old = current_cred();
- retval = security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_ID);
- if (retval)
- goto error;
-
retval = -EPERM;
if (capable(CAP_SETUID)) {
new->suid = new->uid = uid;
if (!new)
return -ENOMEM;
- retval = security_task_setuid(ruid, euid, suid, LSM_SETID_RES);
- if (retval)
- goto error;
old = current_cred();
retval = -EPERM;
return -ENOMEM;
old = current_cred();
- retval = security_task_setgid(rgid, egid, sgid, LSM_SETID_RES);
- if (retval)
- goto error;
-
retval = -EPERM;
if (!capable(CAP_SETGID)) {
if (rgid != (gid_t) -1 && rgid != old->gid &&
old = current_cred();
old_fsuid = old->fsuid;
- if (security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS) < 0)
- goto error;
-
if (uid == old->uid || uid == old->euid ||
uid == old->suid || uid == old->fsuid ||
capable(CAP_SETUID)) {
}
}
-error:
abort_creds(new);
return old_fsuid;
old = current_cred();
old_fsgid = old->fsgid;
- if (security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_FS))
- goto error;
-
if (gid == old->gid || gid == old->egid ||
gid == old->sgid || gid == old->fsgid ||
capable(CAP_SETGID)) {
}
}
-error:
abort_creds(new);
return old_fsgid;
void do_sys_times(struct tms *tms)
{
- struct task_cputime cputime;
- cputime_t cutime, cstime;
+ cputime_t tgutime, tgstime, cutime, cstime;
- thread_group_cputime(current, &cputime);
spin_lock_irq(¤t->sighand->siglock);
+ thread_group_times(current, &tgutime, &tgstime);
cutime = current->signal->cutime;
cstime = current->signal->cstime;
spin_unlock_irq(¤t->sighand->siglock);
- tms->tms_utime = cputime_to_clock_t(cputime.utime);
- tms->tms_stime = cputime_to_clock_t(cputime.stime);
+ tms->tms_utime = cputime_to_clock_t(tgutime);
+ tms->tms_stime = cputime_to_clock_t(tgstime);
tms->tms_cutime = cputime_to_clock_t(cutime);
tms->tms_cstime = cputime_to_clock_t(cstime);
}
DECLARE_RWSEM(uts_sem);
+#ifdef COMPAT_UTS_MACHINE
+#define override_architecture(name) \
+ (personality(current->personality) == PER_LINUX32 && \
+ copy_to_user(name->machine, COMPAT_UTS_MACHINE, \
+ sizeof(COMPAT_UTS_MACHINE)))
+#else
+#define override_architecture(name) 0
+#endif
+
SYSCALL_DEFINE1(newuname, struct new_utsname __user *, name)
{
int errno = 0;
if (copy_to_user(name, utsname(), sizeof *name))
errno = -EFAULT;
up_read(&uts_sem);
+
+ if (!errno && override_architecture(name))
+ errno = -EFAULT;
return errno;
}
+#ifdef __ARCH_WANT_SYS_OLD_UNAME
+/*
+ * Old cruft
+ */
+SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
+{
+ int error = 0;
+
+ if (!name)
+ return -EFAULT;
+
+ down_read(&uts_sem);
+ if (copy_to_user(name, utsname(), sizeof(*name)))
+ error = -EFAULT;
+ up_read(&uts_sem);
+
+ if (!error && override_architecture(name))
+ error = -EFAULT;
+ return error;
+}
+
+SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
+{
+ int error;
+
+ if (!name)
+ return -EFAULT;
+ if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
+ return -EFAULT;
+
+ down_read(&uts_sem);
+ error = __copy_to_user(&name->sysname, &utsname()->sysname,
+ __OLD_UTS_LEN);
+ error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
+ error |= __copy_to_user(&name->nodename, &utsname()->nodename,
+ __OLD_UTS_LEN);
+ error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
+ error |= __copy_to_user(&name->release, &utsname()->release,
+ __OLD_UTS_LEN);
+ error |= __put_user(0, name->release + __OLD_UTS_LEN);
+ error |= __copy_to_user(&name->version, &utsname()->version,
+ __OLD_UTS_LEN);
+ error |= __put_user(0, name->version + __OLD_UTS_LEN);
+ error |= __copy_to_user(&name->machine, &utsname()->machine,
+ __OLD_UTS_LEN);
+ error |= __put_user(0, name->machine + __OLD_UTS_LEN);
+ up_read(&uts_sem);
+
+ if (!error && override_architecture(name))
+ error = -EFAULT;
+ return error ? -EFAULT : 0;
+}
+#endif
+
SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
{
int errno;
{
struct task_struct *t;
unsigned long flags;
- cputime_t utime, stime;
- struct task_cputime cputime;
+ cputime_t tgutime, tgstime, utime, stime;
unsigned long maxrss = 0;
memset((char *) r, 0, sizeof *r);
utime = stime = cputime_zero;
if (who == RUSAGE_THREAD) {
- utime = task_utime(current);
- stime = task_stime(current);
+ task_times(current, &utime, &stime);
accumulate_thread_rusage(p, r);
maxrss = p->signal->maxrss;
goto out;
break;
case RUSAGE_SELF:
- thread_group_cputime(p, &cputime);
- utime = cputime_add(utime, cputime.utime);
- stime = cputime_add(stime, cputime.stime);
+ thread_group_times(p, &tgutime, &tgstime);
+ utime = cputime_add(utime, tgutime);
+ stime = cputime_add(stime, tgstime);
r->ru_nvcsw += p->signal->nvcsw;
r->ru_nivcsw += p->signal->nivcsw;
r->ru_minflt += p->signal->min_flt;
if (arg4 | arg5)
return -EINVAL;
switch (arg2) {
- case 0:
+ case PR_MCE_KILL_CLEAR:
if (arg3 != 0)
return -EINVAL;
current->flags &= ~PF_MCE_PROCESS;
break;
- case 1:
+ case PR_MCE_KILL_SET:
current->flags |= PF_MCE_PROCESS;
- if (arg3 != 0)
+ if (arg3 == PR_MCE_KILL_EARLY)
current->flags |= PF_MCE_EARLY;
- else
+ else if (arg3 == PR_MCE_KILL_LATE)
current->flags &= ~PF_MCE_EARLY;
+ else if (arg3 == PR_MCE_KILL_DEFAULT)
+ current->flags &=
+ ~(PF_MCE_EARLY|PF_MCE_PROCESS);
+ else
+ return -EINVAL;
break;
default:
return -EINVAL;
}
error = 0;
break;
-
+ case PR_MCE_KILL_GET:
+ if (arg2 | arg3 | arg4 | arg5)
+ return -EINVAL;
+ if (current->flags & PF_MCE_PROCESS)
+ error = (current->flags & PF_MCE_EARLY) ?
+ PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE;
+ else
+ error = PR_MCE_KILL_DEFAULT;
+ break;
default:
error = -EINVAL;
break;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff