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Commit c4d029f2 authored by Thomas Gleixner's avatar Thomas Gleixner
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tick/broadcast: Prevent NULL pointer dereference 



Dan reported that the recent changes to the broadcast code introduced
a potential NULL dereference.

Add the proper check.

Fixes: e0454311 "tick/broadcast: Sanity check the shutdown of the local clock_event"
Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 1f6823fa

kernel/time/tick-broadcast.c

+10 −8
Original line number Diff line number Diff line
@@ -409,6 +409,7 @@ void tick_broadcast_control(enum tick_broadcast_mode mode) 
		break;

	}



	if (bc) {

		if (cpumask_empty(tick_broadcast_mask)) {

			if (!bc_stopped)

				clockevents_shutdown(bc);
@@ -418,6 +419,7 @@ void tick_broadcast_control(enum tick_broadcast_mode mode) 
			else

				tick_broadcast_setup_oneshot(bc);

		}

	}

	raw_spin_unlock(&tick_broadcast_lock);

}

EXPORT_SYMBOL_GPL(tick_broadcast_control);