cregit-Linux how code gets into the kernel

Release 4.12 mm/kmemleak-test.c

Directory: mm
/*
 * mm/kmemleak-test.c
 *
 * Copyright (C) 2008 ARM Limited
 * Written by Catalin Marinas <catalin.marinas@arm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */


#define pr_fmt(fmt) "kmemleak: " fmt

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/list.h>
#include <linux/percpu.h>
#include <linux/fdtable.h>

#include <linux/kmemleak.h>


struct test_node {
	
long header[25];
	
struct list_head list;
	
long footer[25];
};

static LIST_HEAD(test_list);
static DEFINE_PER_CPU(void *, kmemleak_test_pointer);

/*
 * Some very simple testing. This function needs to be extended for
 * proper testing.
 */

static int __init kmemleak_test_init(void) { struct test_node *elem; int i; pr_info("Kmemleak testing\n"); /* make some orphan objects */ pr_info("kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL)); pr_info("kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL)); pr_info("kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL)); pr_info("kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL)); pr_info("kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL)); pr_info("kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL)); pr_info("kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL)); pr_info("kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL)); #ifndef CONFIG_MODULES pr_info("kmem_cache_alloc(files_cachep) = %p\n", kmem_cache_alloc(files_cachep, GFP_KERNEL)); pr_info("kmem_cache_alloc(files_cachep) = %p\n", kmem_cache_alloc(files_cachep, GFP_KERNEL)); #endif pr_info("vmalloc(64) = %p\n", vmalloc(64)); pr_info("vmalloc(64) = %p\n", vmalloc(64)); pr_info("vmalloc(64) = %p\n", vmalloc(64)); pr_info("vmalloc(64) = %p\n", vmalloc(64)); pr_info("vmalloc(64) = %p\n", vmalloc(64)); /* * Add elements to a list. They should only appear as orphan * after the module is removed. */ for (i = 0; i < 10; i++) { elem = kzalloc(sizeof(*elem), GFP_KERNEL); pr_info("kzalloc(sizeof(*elem)) = %p\n", elem); if (!elem) return -ENOMEM; INIT_LIST_HEAD(&elem->list); list_add_tail(&elem->list, &test_list); } for_each_possible_cpu(i) { per_cpu(kmemleak_test_pointer, i) = kmalloc(129, GFP_KERNEL); pr_info("kmalloc(129) = %p\n", per_cpu(kmemleak_test_pointer, i)); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Catalin Marinas27692.93%120.00%
Fabian Frederick175.72%120.00%
Tejun Heo20.67%120.00%
Jesper Juhl10.34%120.00%
Joe Perches10.34%120.00%
Total297100.00%5100.00%

module_init(kmemleak_test_init);
static void __exit kmemleak_test_exit(void) { struct test_node *elem, *tmp; /* * Remove the list elements without actually freeing the * memory. */ list_for_each_entry_safe(elem, tmp, &test_list, list) list_del(&elem->list); }

Contributors

PersonTokensPropCommitsCommitProp
Catalin Marinas36100.00%1100.00%
Total36100.00%1100.00%

module_exit(kmemleak_test_exit); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Catalin Marinas39193.10%120.00%
Fabian Frederick245.71%120.00%
Tejun Heo30.71%120.00%
Jesper Juhl10.24%120.00%
Joe Perches10.24%120.00%
Total420100.00%5100.00%
Directory: mm
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