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Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse Source 
Pull misc compat stuff updates from Al Viro:
 "This part is basically untangling various compat stuff. Compat
  syscalls moved to their native counterparts, getting rid of quite a
  bit of double-copying and/or set_fs() uses. A lot of field-by-field
  copyin/copyout killed off.

   - kernel/compat.c is much closer to containing just the
     copyin/copyout of compat structs. Not all compat syscalls are gone
     from it yet, but it's getting there.

   - ipc/compat_mq.c killed off completely.

   - block/compat_ioctl.c cleaned up; floppy compat ioctls moved to
     drivers/block/floppy.c where they belong. Yes, there are several
     drivers that implement some of the same ioctls. Some are m68k and
     one is 32bit-only pmac. drivers/block/floppy.c is the only one in
     that bunch that can be built on biarch"

* 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  mqueue: move compat syscalls to native ones
  usbdevfs: get rid of field-by-field copyin
  compat_hdio_ioctl: get rid of set_fs()
  take floppy compat ioctls to sodding floppy.c
  ipmi: get rid of field-by-field __get_user()
  ipmi: get COMPAT_IPMICTL_RECEIVE_MSG in sync with the native one
  rt_sigtimedwait(): move compat to native
  select: switch compat_{get,put}_fd_set() to compat_{get,put}_bitmap()
  put_compat_rusage(): switch to copy_to_user()
  sigpending(): move compat to native
  getrlimit()/setrlimit(): move compat to native
  times(2): move compat to native
  compat_{get,put}_bitmap(): use unsafe_{get,put}_user()
  fb_get_fscreeninfo(): don't bother with do_fb_ioctl()
  do_sigaltstack(): lift copying to/from userland into callers
  take compat_sys_old_getrlimit() to native syscall
  trim __ARCH_WANT_SYS_OLD_GETRLIMIT
This commit is contained in:
Linus Torvalds
2017-07-06 20:57:13 -07:00
parent 771d3feb4b 0d0606060b
commit c856863988
23 changed files with 1020 additions and 1138 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/compat.c
+49 -218
View File
@@ -247,53 +247,6 @@ int put_compat_itimerval(struct compat_itimerval __user *o, const struct itimerv
return copy_to_user(o, &v32, sizeof(struct compat_itimerval)) ? -EFAULT : 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));
}
COMPAT_SYSCALL_DEFINE1(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().
*/
COMPAT_SYSCALL_DEFINE1(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
/*
@@ -348,94 +301,29 @@ COMPAT_SYSCALL_DEFINE3(sigprocmask, int, how,
#endif
COMPAT_SYSCALL_DEFINE2(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
COMPAT_SYSCALL_DEFINE2(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, (struct rlimit __user *)&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
COMPAT_SYSCALL_DEFINE2(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))
struct compat_rusage r32;
memset(&r32, 0, sizeof(r32));
r32.ru_utime.tv_sec = r->ru_utime.tv_sec;
r32.ru_utime.tv_usec = r->ru_utime.tv_usec;
r32.ru_stime.tv_sec = r->ru_stime.tv_sec;
r32.ru_stime.tv_usec = r->ru_stime.tv_usec;
r32.ru_maxrss = r->ru_maxrss;
r32.ru_ixrss = r->ru_ixrss;
r32.ru_idrss = r->ru_idrss;
r32.ru_isrss = r->ru_isrss;
r32.ru_minflt = r->ru_minflt;
r32.ru_majflt = r->ru_majflt;
r32.ru_nswap = r->ru_nswap;
r32.ru_inblock = r->ru_inblock;
r32.ru_oublock = r->ru_oublock;
r32.ru_msgsnd = r->ru_msgsnd;
r32.ru_msgrcv = r->ru_msgrcv;
r32.ru_nsignals = r->ru_nsignals;
r32.ru_nvcsw = r->ru_nvcsw;
r32.ru_nivcsw = r->ru_nivcsw;
if (copy_to_user(ru, &r32, sizeof(r32)))
return -EFAULT;
return 0;
}
@@ -565,84 +453,59 @@ int get_compat_sigevent(struct sigevent *event,
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);
nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
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) {
nr_compat_longs--;
if (__get_user(um, umask))
return -EFAULT;
} else {
um = 0;
}
umask++;
m |= (long)um << (j * BITS_PER_COMPAT_LONG);
}
*mask++ = m;
user_access_begin();
while (nr_compat_longs > 1) {
compat_ulong_t l1, l2;
unsafe_get_user(l1, umask++, Efault);
unsafe_get_user(l2, umask++, Efault);
*mask++ = ((unsigned long)l2 << BITS_PER_COMPAT_LONG) | l1;
nr_compat_longs -= 2;
}
if (nr_compat_longs)
unsafe_get_user(*mask, umask++, Efault);
user_access_end();
return 0;
Efault:
user_access_end();
return -EFAULT;
}
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);
nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
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) {
nr_compat_longs--;
if (__put_user(um, umask))
return -EFAULT;
}
umask++;
m >>= 4*sizeof(um);
m >>= 4*sizeof(um);
}
user_access_begin();
while (nr_compat_longs > 1) {
unsigned long m = *mask++;
unsafe_put_user((compat_ulong_t)m, umask++, Efault);
unsafe_put_user(m >> BITS_PER_COMPAT_LONG, umask++, Efault);
nr_compat_longs -= 2;
}
if (nr_compat_longs)
unsafe_put_user((compat_ulong_t)*mask, umask++, Efault);
user_access_end();
return 0;
Efault:
user_access_end();
return -EFAULT;
}
void
@@ -668,38 +531,6 @@ sigset_to_compat(compat_sigset_t *compat, const sigset_t *set)
}
}
COMPAT_SYSCALL_DEFINE4(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 (compat_get_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;
}
#ifdef CONFIG_NUMA
COMPAT_SYSCALL_DEFINE6(move_pages, pid_t, pid, compat_ulong_t, nr_pages,
compat_uptr_t __user *, pages32,
kernel/signal.c
+93 -62
View File
@@ -2776,7 +2776,7 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from)
* @info: if non-null, the signal's siginfo is returned here
* @ts: upper bound on process time suspension
*/
int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
static int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
const struct timespec *ts)
{
ktime_t *to = NULL, timeout = KTIME_MAX;
@@ -2865,6 +2865,40 @@ SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese,
return ret;
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE4(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 (compat_get_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;
}
#endif
/**
* sys_kill - send a signal to a process
* @pid: the PID of the process
@@ -3121,78 +3155,68 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
}
static int
do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long sp)
do_sigaltstack (const stack_t *ss, stack_t *oss, unsigned long sp)
{
stack_t oss;
int error;
struct task_struct *t = current;
oss.ss_sp = (void __user *) current->sas_ss_sp;
oss.ss_size = current->sas_ss_size;
oss.ss_flags = sas_ss_flags(sp) |
(current->sas_ss_flags & SS_FLAG_BITS);
if (oss) {
memset(oss, 0, sizeof(stack_t));
oss->ss_sp = (void __user *) t->sas_ss_sp;
oss->ss_size = t->sas_ss_size;
oss->ss_flags = sas_ss_flags(sp) |
(current->sas_ss_flags & SS_FLAG_BITS);
}
if (uss) {
void __user *ss_sp;
size_t ss_size;
unsigned ss_flags;
if (ss) {
void __user *ss_sp = ss->ss_sp;
size_t ss_size = ss->ss_size;
unsigned ss_flags = ss->ss_flags;
int ss_mode;
error = -EFAULT;
if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
goto out;
error = __get_user(ss_sp, &uss->ss_sp) |
__get_user(ss_flags, &uss->ss_flags) |
__get_user(ss_size, &uss->ss_size);
if (error)
goto out;
error = -EPERM;
if (on_sig_stack(sp))
goto out;
if (unlikely(on_sig_stack(sp)))
return -EPERM;
ss_mode = ss_flags & ~SS_FLAG_BITS;
error = -EINVAL;
if (ss_mode != SS_DISABLE && ss_mode != SS_ONSTACK &&
ss_mode != 0)
goto out;
if (unlikely(ss_mode != SS_DISABLE && ss_mode != SS_ONSTACK &&
ss_mode != 0))
return -EINVAL;
if (ss_mode == SS_DISABLE) {
ss_size = 0;
ss_sp = NULL;
} else {
error = -ENOMEM;
if (ss_size < MINSIGSTKSZ)
goto out;
if (unlikely(ss_size < MINSIGSTKSZ))
return -ENOMEM;
}
current->sas_ss_sp = (unsigned long) ss_sp;
current->sas_ss_size = ss_size;
current->sas_ss_flags = ss_flags;
t->sas_ss_sp = (unsigned long) ss_sp;
t->sas_ss_size = ss_size;
t->sas_ss_flags = ss_flags;
}
error = 0;
if (uoss) {
error = -EFAULT;
if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
goto out;
error = __put_user(oss.ss_sp, &uoss->ss_sp) |
__put_user(oss.ss_size, &uoss->ss_size) |
__put_user(oss.ss_flags, &uoss->ss_flags);
}
out:
return error;
return 0;
}
SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss)
{
return do_sigaltstack(uss, uoss, current_user_stack_pointer());
stack_t new, old;
int err;
if (uss && copy_from_user(&new, uss, sizeof(stack_t)))
return -EFAULT;
err = do_sigaltstack(uss ? &new : NULL, uoss ? &old : NULL,
current_user_stack_pointer());
if (!err && uoss && copy_to_user(uoss, &old, sizeof(stack_t)))
err = -EFAULT;
return err;
}
int restore_altstack(const stack_t __user *uss)
{
int err = do_sigaltstack(uss, NULL, current_user_stack_pointer());
stack_t new;
if (copy_from_user(&new, uss, sizeof(stack_t)))
return -EFAULT;
(void)do_sigaltstack(&new, NULL, current_user_stack_pointer());
/* squash all but EFAULT for now */
return err == -EFAULT ? err : 0;
return 0;
}
int __save_altstack(stack_t __user *uss, unsigned long sp)
@@ -3215,29 +3239,24 @@ COMPAT_SYSCALL_DEFINE2(sigaltstack,
{
stack_t uss, uoss;
int ret;
mm_segment_t seg;
if (uss_ptr) {
compat_stack_t uss32;
memset(&uss, 0, sizeof(stack_t));
if (copy_from_user(&uss32, uss_ptr, sizeof(compat_stack_t)))
return -EFAULT;
uss.ss_sp = compat_ptr(uss32.ss_sp);
uss.ss_flags = uss32.ss_flags;
uss.ss_size = uss32.ss_size;
}
seg = get_fs();
set_fs(KERNEL_DS);
ret = do_sigaltstack((stack_t __force __user *) (uss_ptr ? &uss : NULL),
(stack_t __force __user *) &uoss,
ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss,
compat_user_stack_pointer());
set_fs(seg);
if (ret >= 0 && uoss_ptr) {
if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(compat_stack_t)) ||
__put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
__put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
__put_user(uoss.ss_size, &uoss_ptr->ss_size))
compat_stack_t old;
memset(&old, 0, sizeof(old));
old.ss_sp = ptr_to_compat(uoss.ss_sp);
old.ss_flags = uoss.ss_flags;
old.ss_size = uoss.ss_size;
if (copy_to_user(uoss_ptr, &old, sizeof(compat_stack_t)))
ret = -EFAULT;
}
return ret;
@@ -3277,6 +3296,18 @@ SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set)
return sys_rt_sigpending((sigset_t __user *)set, sizeof(old_sigset_t));
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set32)
{
sigset_t set;
int err = do_sigpending(&set, sizeof(old_sigset_t));
if (err == 0)
if (copy_to_user(set32, &set, sizeof(old_sigset_t)))
err = -EFAULT;
return err;
}
#endif
#endif
#ifdef __ARCH_WANT_SYS_SIGPROCMASK
kernel/sys.c
+99 -1
View File
@@ -886,7 +886,7 @@ SYSCALL_DEFINE0(getegid)
return from_kgid_munged(current_user_ns(), current_egid());
}
void do_sys_times(struct tms *tms)
static void do_sys_times(struct tms *tms)
{
u64 tgutime, tgstime, cutime, cstime;
@@ -912,6 +912,32 @@ SYSCALL_DEFINE1(times, struct tms __user *, tbuf)
return (long) jiffies_64_to_clock_t(get_jiffies_64());
}
#ifdef CONFIG_COMPAT
static compat_clock_t clock_t_to_compat_clock_t(clock_t x)
{
return compat_jiffies_to_clock_t(clock_t_to_jiffies(x));
}
COMPAT_SYSCALL_DEFINE1(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);
}
#endif
/*
* This needs some heavy checking ...
* I just haven't the stomach for it. I also don't fully
@@ -1306,6 +1332,54 @@ SYSCALL_DEFINE2(getrlimit, unsigned int, resource, struct rlimit __user *, rlim)
return ret;
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(setrlimit, unsigned int, resource,
struct compat_rlimit __user *, rlim)
{
struct rlimit r;
struct compat_rlimit r32;
if (copy_from_user(&r32, rlim, sizeof(struct compat_rlimit)))
return -EFAULT;
if (r32.rlim_cur == COMPAT_RLIM_INFINITY)
r.rlim_cur = RLIM_INFINITY;
else
r.rlim_cur = r32.rlim_cur;
if (r32.rlim_max == COMPAT_RLIM_INFINITY)
r.rlim_max = RLIM_INFINITY;
else
r.rlim_max = r32.rlim_max;
return do_prlimit(current, resource, &r, NULL);
}
COMPAT_SYSCALL_DEFINE2(getrlimit, unsigned int, resource,
struct compat_rlimit __user *, rlim)
{
struct rlimit r;
int ret;
ret = do_prlimit(current, resource, NULL, &r);
if (!ret) {
struct rlimit r32;
if (r.rlim_cur > COMPAT_RLIM_INFINITY)
r32.rlim_cur = COMPAT_RLIM_INFINITY;
else
r32.rlim_cur = r.rlim_cur;
if (r.rlim_max > COMPAT_RLIM_INFINITY)
r32.rlim_max = COMPAT_RLIM_INFINITY;
else
r32.rlim_max = r.rlim_max;
if (copy_to_user(rlim, &r32, sizeof(struct compat_rlimit)))
return -EFAULT;
}
return ret;
}
#endif
#ifdef __ARCH_WANT_SYS_OLD_GETRLIMIT
/*
@@ -1328,6 +1402,30 @@ SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource,
return copy_to_user(rlim, &x, sizeof(x)) ? -EFAULT : 0;
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource,
struct compat_rlimit __user *, rlim)
{
struct rlimit r;
if (resource >= RLIM_NLIMITS)
return -EINVAL;
task_lock(current->group_leader);
r = current->signal->rlim[resource];
task_unlock(current->group_leader);
if (r.rlim_cur > 0x7FFFFFFF)
r.rlim_cur = 0x7FFFFFFF;
if (r.rlim_max > 0x7FFFFFFF)
r.rlim_max = 0x7FFFFFFF;
if (put_user(r.rlim_cur, &rlim->rlim_cur) ||
put_user(r.rlim_max, &rlim->rlim_max))
return -EFAULT;
return 0;
}
#endif
#endif
static inline bool rlim64_is_infinity(__u64 rlim64)