ntp: Move adjtimex related compat syscalls to native counterparts
Get rid of set_fs() mess and sanitize compat_{get,put}_timex(),
while we are at it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170607084241.28657-9-viro@ZenIV.linux.org.uk
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index ea4a463..b1b6d52 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -1018,6 +1018,33 @@ SYSCALL_DEFINE2(clock_adjtime, const clockid_t, which_clock,
return err;
}
+#ifdef CONFIG_COMPAT
+
+COMPAT_SYSCALL_DEFINE2(clock_adjtime, clockid_t, which_clock,
+ struct compat_timex __user *, utp)
+{
+ const struct k_clock *kc = clockid_to_kclock(which_clock);
+ struct timex ktx;
+ int err;
+
+ if (!kc)
+ return -EINVAL;
+ if (!kc->clock_adj)
+ return -EOPNOTSUPP;
+
+ err = compat_get_timex(&ktx, utp);
+ if (err)
+ return err;
+
+ err = kc->clock_adj(which_clock, &ktx);
+
+ if (err >= 0)
+ err = compat_put_timex(utp, &ktx);
+
+ return err;
+}
+#endif
+
SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
struct timespec __user *, tp)
{
