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Commit 70d715fd authored by Hiroshi Shimamoto's avatar Hiroshi Shimamoto Committed by Ingo Molnar
Browse files

posix-timers: Fix oops in clock_nanosleep() with CLOCK_MONOTONIC_RAW 



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

Signed-off-by: default avatarHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: <stable@kernel.org>
LKML-Reference: <4A764FF3.50607@ct.jp.nec.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a33a052f

kernel/posix-timers.c

+7 −0
Original line number Diff line number Diff line
@@ -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);