Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * samples/kmemleak/kmemleak-test.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2008 ARM Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Written by Catalin Marinas <catalin.marinas@arm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define pr_fmt(fmt) "kmemleak: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/fdtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kmemleak.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct test_node {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	long header[25];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	long footer[25];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static LIST_HEAD(test_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static DEFINE_PER_CPU(void *, kmemleak_test_pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  * Some very simple testing. This function needs to be extended for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  * proper testing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int __init kmemleak_test_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	struct test_node *elem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	pr_info("Kmemleak testing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* make some orphan objects */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	pr_info("kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	pr_info("kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	pr_info("kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	pr_info("kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	pr_info("kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	pr_info("kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	pr_info("kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	pr_info("kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #ifndef CONFIG_MODULES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	pr_info("kmem_cache_alloc(files_cachep) = %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		kmem_cache_alloc(files_cachep, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	pr_info("kmem_cache_alloc(files_cachep) = %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		kmem_cache_alloc(files_cachep, GFP_KERNEL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	pr_info("vmalloc(64) = %p\n", vmalloc(64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	pr_info("vmalloc(64) = %p\n", vmalloc(64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	pr_info("vmalloc(64) = %p\n", vmalloc(64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	pr_info("vmalloc(64) = %p\n", vmalloc(64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	pr_info("vmalloc(64) = %p\n", vmalloc(64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	 * Add elements to a list. They should only appear as orphan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	 * after the module is removed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	for (i = 0; i < 10; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		elem = kzalloc(sizeof(*elem), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		pr_info("kzalloc(sizeof(*elem)) = %p\n", elem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 		if (!elem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 			return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		INIT_LIST_HEAD(&elem->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		list_add_tail(&elem->list, &test_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		per_cpu(kmemleak_test_pointer, i) = kmalloc(129, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		pr_info("kmalloc(129) = %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 			per_cpu(kmemleak_test_pointer, i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) module_init(kmemleak_test_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static void __exit kmemleak_test_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	struct test_node *elem, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	 * Remove the list elements without actually freeing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 	 * memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	list_for_each_entry_safe(elem, tmp, &test_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 		list_del(&elem->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) module_exit(kmemleak_test_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) MODULE_LICENSE("GPL");