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Revision b5b9b5b318f9b6fef1bd3e2c8c63d0bff47703a1 authored by Liu Bo on 03 July 2013, 06:40:44 UTC, committed by Chris Mason on 09 August 2013, 23:29:42 UTC 
Btrfs: fix extent buffer leak after backref walking
 
commit 47fb091fb787420cd195e66f162737401cce023f(Btrfs: fix unlock after free on rewinded tree blocks)
takes an extra increment on the reference of allocated dummy extent buffer, so now we
cannot free this dummy one, and end up with extent buffer leak.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
1 parent e68afa4
Raw File
cpu-notifier-error-inject.c 
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpu.h>

#include "notifier-error-inject.h"

static int priority;
module_param(priority, int, 0);
MODULE_PARM_DESC(priority, "specify cpu notifier priority");

static struct notifier_err_inject cpu_notifier_err_inject = {
	.actions = {
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_UP_PREPARE_FROZEN) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE) },
		{ NOTIFIER_ERR_INJECT_ACTION(CPU_DOWN_PREPARE_FROZEN) },
		{}
	}
};

static struct dentry *dir;

static int err_inject_init(void)
{
	int err;

	dir = notifier_err_inject_init("cpu", notifier_err_inject_dir,
					&cpu_notifier_err_inject, priority);
	if (IS_ERR(dir))
		return PTR_ERR(dir);

	err = register_hotcpu_notifier(&cpu_notifier_err_inject.nb);
	if (err)
		debugfs_remove_recursive(dir);

	return err;
}

static void err_inject_exit(void)
{
	unregister_hotcpu_notifier(&cpu_notifier_err_inject.nb);
	debugfs_remove_recursive(dir);
}

module_init(err_inject_init);
module_exit(err_inject_exit);

MODULE_DESCRIPTION("CPU notifier error injection module");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
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