Merge "sched: walt: fix use after free in walt_task_dump()" (612bd368) · Commits · e / devices / android_kernel_xiaomi_nabu

kernel/sched/walt.h

+12 −2

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
		* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
		*/

		#ifndef __WALT_H
		@@ -364,6 +364,15 @@ static inline void walt_rq_dump(int cpu)
		struct task_struct *tsk = cpu_curr(cpu);
		int i;

		/*
		* Increment the task reference so that it can't be
		* freed on a remote CPU. Since we are going to
		* enter panic, there is no need to decrement the
		* task reference. Decrementing the task reference
		* can't be done in atomic context, especially with
		* rq locks held.
		*/
		get_task_struct(tsk);
		printk_deferred("CPU:%d nr_running:%u current: %d (%s)\n",
		cpu, rq->nr_running, tsk->pid, tsk->comm);

		@@ -388,6 +397,7 @@ static inline void walt_rq_dump(int cpu)
		printk_deferred("rq->load_subs[%d].new_subs=%llu)\n", i,
		rq->load_subs[i].new_subs);
		}
		if (!exiting_task(tsk))
		walt_task_dump(tsk);
		SCHED_PRINT(sched_capacity_margin_up[cpu]);
		SCHED_PRINT(sched_capacity_margin_down[cpu]);