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Subject[PATCH] posix-timers: fix oops in clock_nanosleep() with CLOCK_MONOTONIC_RAW
From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>

Prevent calling do_nanosleep() with clockid CLOCK_MONOTONIC_RAW, it may
cause oops, such as NULL pointer dereference.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
---
kernel/posix-timers.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 052ec4d..d089d05 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -202,6 +202,12 @@ static int no_timer_create(struct k_itimer *new_timer)
return -EOPNOTSUPP;
}

+static int no_nsleep(const clockid_t which_clock, int flags,
+ struct timespec *tsave, struct timespec __user *rmtp)
+{
+ return -EOPNOTSUPP;
+}
+
/*
* Return nonzero if we know a priori this clockid_t value is bogus.
*/
@@ -254,6 +260,7 @@ static __init int init_posix_timers(void)
.clock_get = posix_get_monotonic_raw,
.clock_set = do_posix_clock_nosettime,
.timer_create = no_timer_create,
+ .nsleep = no_nsleep,
};

register_posix_clock(CLOCK_REALTIME, &clock_realtime);
--
1.6.3.3


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