void user_disable_single_step(struct task_struct *task)
{
	struct pt_regs *regs = task->thread.regs;

	if (regs != NULL) {
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
		/*
		 * The logic to disable single stepping should be as
		 * simple as turning off the Instruction Complete flag.
		 * And, after doing so, if all debug flags are off, turn
		 * off DBCR0(IDM) and MSR(DE) .... Torez
		 */
		task->thread.debug.dbcr0 &= ~(DBCR0_IC|DBCR0_BT);
		/*
		 * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.
		 */
		if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,
					task->thread.debug.dbcr1)) {
			/*
			 * All debug events were off.....
			 */
			task->thread.debug.dbcr0 &= ~DBCR0_IDM;
			regs->msr &= ~MSR_DE;
		}
#else
		regs->msr &= ~(MSR_SE | MSR_BE);
#endif
	}
	clear_tsk_thread_flag(task, TIF_SINGLESTEP);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.