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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-02 12:51:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-02 12:51:41 -0700
commit7125764c5d1a5c72d522f1011b6cc8b8100b48fe (patch)
tree678f3355ac872a4379b28dbe36f5beddd0e284d8 /kernel
parentc6f21243ce1e8d81ad8361da4d2eaa5947b667c4 (diff)
parentdce44e03b0a3448ad11ac6c6e0cbe299e0400791 (diff)
downloadlinux-7125764c5d1a5c72d522f1011b6cc8b8100b48fe.tar.gz
Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull compat time conversion changes from Peter Anvin: "Despite the branch name this is really neither an x86 nor an x32-specific patchset, although it the implementation of the discussions that followed the x32 security hole a few months ago. This removes get/put_compat_timespec/val() and replaces them with compat_get/put_timespec/val() which are savvy as to the current status of COMPAT_USE_64BIT_TIME. It removes several unused and/or incorrect/misleading functions (like compat_put_timeval_convert which doesn't in fact do any conversion) and also replaces several open-coded implementations what is now called compat_convert_timespec() with that function" * 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: compat: Fix sparse address space warnings compat: Get rid of (get|put)_compat_time(val|spec)
Diffstat (limited to 'kernel')
-rw-r--r--kernel/compat.c112
-rw-r--r--kernel/futex_compat.c2
2 files changed, 57 insertions, 57 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index 488ff8c4cf4..e40b0430b56 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -30,28 +30,6 @@
#include <asm/uaccess.h>
-/*
- * Get/set struct timeval with struct timespec on the native side
- */
-static int compat_get_timeval_convert(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_convert(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));
@@ -116,7 +94,7 @@ COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
- if (compat_put_timeval_convert(tv, &ktv))
+ if (compat_put_timeval(&ktv, tv))
return -EFAULT;
}
if (tz) {
@@ -130,59 +108,58 @@ COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
struct timezone __user *, tz)
{
- struct timespec kts;
- struct timezone ktz;
+ struct timeval user_tv;
+ struct timespec new_ts;
+ struct timezone new_tz;
if (tv) {
- if (compat_get_timeval_convert(&kts, tv))
+ if (compat_get_timeval(&user_tv, tv))
return -EFAULT;
+ new_ts.tv_sec = user_tv.tv_sec;
+ new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC;
}
if (tz) {
- if (copy_from_user(&ktz, tz, sizeof(ktz)))
+ if (copy_from_user(&new_tz, tz, sizeof(*tz)))
return -EFAULT;
}
- return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
+ return do_sys_settimeofday(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
}
-int get_compat_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
+static int __compat_get_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
{
return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
__get_user(tv->tv_sec, &ctv->tv_sec) ||
__get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
}
-EXPORT_SYMBOL_GPL(get_compat_timeval);
-int put_compat_timeval(const struct timeval *tv, struct compat_timeval __user *ctv)
+static int __compat_put_timeval(const struct timeval *tv, struct compat_timeval __user *ctv)
{
return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) ||
__put_user(tv->tv_sec, &ctv->tv_sec) ||
__put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
}
-EXPORT_SYMBOL_GPL(put_compat_timeval);
-int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
+static int __compat_get_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;
}
-EXPORT_SYMBOL_GPL(get_compat_timespec);
-int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
+static int __compat_put_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);
int compat_get_timeval(struct timeval *tv, const void __user *utv)
{
if (COMPAT_USE_64BIT_TIME)
return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0;
else
- return get_compat_timeval(tv, utv);
+ return __compat_get_timeval(tv, utv);
}
EXPORT_SYMBOL_GPL(compat_get_timeval);
@@ -191,7 +168,7 @@ int compat_put_timeval(const struct timeval *tv, void __user *utv)
if (COMPAT_USE_64BIT_TIME)
return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0;
else
- return put_compat_timeval(tv, utv);
+ return __compat_put_timeval(tv, utv);
}
EXPORT_SYMBOL_GPL(compat_put_timeval);
@@ -200,7 +177,7 @@ int compat_get_timespec(struct timespec *ts, const void __user *uts)
if (COMPAT_USE_64BIT_TIME)
return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0;
else
- return get_compat_timespec(ts, uts);
+ return __compat_get_timespec(ts, uts);
}
EXPORT_SYMBOL_GPL(compat_get_timespec);
@@ -209,10 +186,33 @@ int compat_put_timespec(const struct timespec *ts, void __user *uts)
if (COMPAT_USE_64BIT_TIME)
return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0;
else
- return put_compat_timespec(ts, uts);
+ return __compat_put_timespec(ts, uts);
}
EXPORT_SYMBOL_GPL(compat_put_timespec);
+int compat_convert_timespec(struct timespec __user **kts,
+ const void __user *cts)
+{
+ struct timespec ts;
+ struct timespec __user *uts;
+
+ if (!cts || COMPAT_USE_64BIT_TIME) {
+ *kts = (struct timespec __user *)cts;
+ return 0;
+ }
+
+ uts = compat_alloc_user_space(sizeof(ts));
+ if (!uts)
+ return -EFAULT;
+ if (compat_get_timespec(&ts, cts))
+ return -EFAULT;
+ if (copy_to_user(uts, &ts, sizeof(ts)))
+ return -EFAULT;
+
+ *kts = uts;
+ return 0;
+}
+
static long compat_nanosleep_restart(struct restart_block *restart)
{
struct compat_timespec __user *rmtp;
@@ -229,7 +229,7 @@ static long compat_nanosleep_restart(struct restart_block *restart)
if (ret) {
rmtp = restart->nanosleep.compat_rmtp;
- if (rmtp && put_compat_timespec(&rmt, rmtp))
+ if (rmtp && compat_put_timespec(&rmt, rmtp))
return -EFAULT;
}
@@ -243,7 +243,7 @@ COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp,
mm_segment_t oldfs;
long ret;
- if (get_compat_timespec(&tu, rqtp))
+ if (compat_get_timespec(&tu, rqtp))
return -EFAULT;
if (!timespec_valid(&tu))
@@ -263,7 +263,7 @@ COMPAT_SYSCALL_DEFINE2(nanosleep, struct compat_timespec __user *, rqtp,
restart->fn = compat_nanosleep_restart;
restart->nanosleep.compat_rmtp = rmtp;
- if (rmtp && put_compat_timespec(&rmt, rmtp))
+ if (rmtp && compat_put_timespec(&rmt, rmtp))
return -EFAULT;
}
@@ -451,7 +451,7 @@ COMPAT_SYSCALL_DEFINE2(old_getrlimit, unsigned int, resource,
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_old_getrlimit(resource, &r);
+ ret = sys_old_getrlimit(resource, (struct rlimit __user *)&r);
set_fs(old_fs);
if (!ret) {
@@ -647,8 +647,8 @@ COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t, pid, unsigned int, len,
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))
+ if (__compat_get_timespec(&dst->it_interval, &src->it_interval) ||
+ __compat_get_timespec(&dst->it_value, &src->it_value))
return -EFAULT;
return 0;
}
@@ -656,8 +656,8 @@ int get_compat_itimerspec(struct itimerspec *dst,
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))
+ if (__compat_put_timespec(&src->it_interval, &dst->it_interval) ||
+ __compat_put_timespec(&src->it_value, &dst->it_value))
return -EFAULT;
return 0;
}
@@ -727,7 +727,7 @@ COMPAT_SYSCALL_DEFINE2(clock_settime, clockid_t, which_clock,
mm_segment_t oldfs;
struct timespec ts;
- if (get_compat_timespec(&ts, tp))
+ if (compat_get_timespec(&ts, tp))
return -EFAULT;
oldfs = get_fs();
set_fs(KERNEL_DS);
@@ -749,7 +749,7 @@ COMPAT_SYSCALL_DEFINE2(clock_gettime, clockid_t, which_clock,
err = sys_clock_gettime(which_clock,
(struct timespec __user *) &ts);
set_fs(oldfs);
- if (!err && put_compat_timespec(&ts, tp))
+ if (!err && compat_put_timespec(&ts, tp))
return -EFAULT;
return err;
}
@@ -789,7 +789,7 @@ COMPAT_SYSCALL_DEFINE2(clock_getres, clockid_t, which_clock,
err = sys_clock_getres(which_clock,
(struct timespec __user *) &ts);
set_fs(oldfs);
- if (!err && tp && put_compat_timespec(&ts, tp))
+ if (!err && tp && compat_put_timespec(&ts, tp))
return -EFAULT;
return err;
}
@@ -799,7 +799,7 @@ 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;
+ struct compat_timespec __user *rmtp = restart->nanosleep.compat_rmtp;
restart->nanosleep.rmtp = (struct timespec __user *) &tu;
oldfs = get_fs();
@@ -808,7 +808,7 @@ static long compat_clock_nanosleep_restart(struct restart_block *restart)
set_fs(oldfs);
if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
- put_compat_timespec(&tu, rmtp))
+ compat_put_timespec(&tu, rmtp))
return -EFAULT;
if (err == -ERESTART_RESTARTBLOCK) {
@@ -827,7 +827,7 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
struct timespec in, out;
struct restart_block *restart;
- if (get_compat_timespec(&in, rqtp))
+ if (compat_get_timespec(&in, rqtp))
return -EFAULT;
oldfs = get_fs();
@@ -838,7 +838,7 @@ COMPAT_SYSCALL_DEFINE4(clock_nanosleep, clockid_t, which_clock, int, flags,
set_fs(oldfs);
if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
- put_compat_timespec(&out, rmtp))
+ compat_put_timespec(&out, rmtp))
return -EFAULT;
if (err == -ERESTART_RESTARTBLOCK) {
@@ -1130,7 +1130,7 @@ COMPAT_SYSCALL_DEFINE2(sched_rr_get_interval,
set_fs(KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
set_fs(old_fs);
- if (put_compat_timespec(&t, interval))
+ if (compat_put_timespec(&t, interval))
return -EFAULT;
return ret;
}
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index f9f44fd4d34..55c8c9349cf 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -183,7 +183,7 @@ COMPAT_SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
cmd == FUTEX_WAIT_BITSET ||
cmd == FUTEX_WAIT_REQUEUE_PI)) {
- if (get_compat_timespec(&ts, utime))
+ if (compat_get_timespec(&ts, utime))
return -EFAULT;
if (!timespec_valid(&ts))
return -EINVAL;