Linux 6.9-rc1

[linux-2.6-microblaze.git] / lib / test_kasan_module.c

diff --git a/lib/test_kasan_module.c b/lib/test_kasan_module.c
deleted file mode 100644 (file)
index b112cbc..0000000
--- a/lib/test_kasan_module.c
+++ /dev/null
@@ -1,141 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *
- * Copyright (c) 2014 Samsung Electronics Co., Ltd.
- * Author: Andrey Ryabinin <a.ryabinin@samsung.com>
- */
-
-#define pr_fmt(fmt) "kasan test: %s " fmt, __func__
-
-#include <linux/mman.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include "../mm/kasan/kasan.h"
-
-static noinline void __init copy_user_test(void)
-{
-       char *kmem;
-       char __user *usermem;
-       size_t size = 128 - KASAN_GRANULE_SIZE;
-       int __maybe_unused unused;
-
-       kmem = kmalloc(size, GFP_KERNEL);
-       if (!kmem)
-               return;
-
-       usermem = (char __user *)vm_mmap(NULL, 0, PAGE_SIZE,
-                           PROT_READ | PROT_WRITE | PROT_EXEC,
-                           MAP_ANONYMOUS | MAP_PRIVATE, 0);
-       if (IS_ERR(usermem)) {
-               pr_err("Failed to allocate user memory\n");
-               kfree(kmem);
-               return;
-       }
-
-       OPTIMIZER_HIDE_VAR(size);
-
-       pr_info("out-of-bounds in copy_from_user()\n");
-       unused = copy_from_user(kmem, usermem, size + 1);
-
-       pr_info("out-of-bounds in copy_to_user()\n");
-       unused = copy_to_user(usermem, kmem, size + 1);
-
-       pr_info("out-of-bounds in __copy_from_user()\n");
-       unused = __copy_from_user(kmem, usermem, size + 1);
-
-       pr_info("out-of-bounds in __copy_to_user()\n");
-       unused = __copy_to_user(usermem, kmem, size + 1);
-
-       pr_info("out-of-bounds in __copy_from_user_inatomic()\n");
-       unused = __copy_from_user_inatomic(kmem, usermem, size + 1);
-
-       pr_info("out-of-bounds in __copy_to_user_inatomic()\n");
-       unused = __copy_to_user_inatomic(usermem, kmem, size + 1);
-
-       pr_info("out-of-bounds in strncpy_from_user()\n");
-       unused = strncpy_from_user(kmem, usermem, size + 1);
-
-       vm_munmap((unsigned long)usermem, PAGE_SIZE);
-       kfree(kmem);
-}
-
-static struct kasan_rcu_info {
-       int i;
-       struct rcu_head rcu;
-} *global_rcu_ptr;
-
-static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp)
-{
-       struct kasan_rcu_info *fp = container_of(rp,
-                                               struct kasan_rcu_info, rcu);
-
-       kfree(fp);
-       ((volatile struct kasan_rcu_info *)fp)->i;
-}
-
-static noinline void __init kasan_rcu_uaf(void)
-{
-       struct kasan_rcu_info *ptr;
-
-       pr_info("use-after-free in kasan_rcu_reclaim\n");
-       ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL);
-       if (!ptr) {
-               pr_err("Allocation failed\n");
-               return;
-       }
-
-       global_rcu_ptr = rcu_dereference_protected(ptr, NULL);
-       call_rcu(&global_rcu_ptr->rcu, kasan_rcu_reclaim);
-}
-
-static noinline void __init kasan_workqueue_work(struct work_struct *work)
-{
-       kfree(work);
-}
-
-static noinline void __init kasan_workqueue_uaf(void)
-{
-       struct workqueue_struct *workqueue;
-       struct work_struct *work;
-
-       workqueue = create_workqueue("kasan_wq_test");
-       if (!workqueue) {
-               pr_err("Allocation failed\n");
-               return;
-       }
-       work = kmalloc(sizeof(struct work_struct), GFP_KERNEL);
-       if (!work) {
-               pr_err("Allocation failed\n");
-               return;
-       }
-
-       INIT_WORK(work, kasan_workqueue_work);
-       queue_work(workqueue, work);
-       destroy_workqueue(workqueue);
-
-       pr_info("use-after-free on workqueue\n");
-       ((volatile struct work_struct *)work)->data;
-}
-
-static int __init test_kasan_module_init(void)
-{
-       /*
-        * Temporarily enable multi-shot mode. Otherwise, KASAN would only
-        * report the first detected bug and panic the kernel if panic_on_warn
-        * is enabled.
-        */
-       bool multishot = kasan_save_enable_multi_shot();
-
-       copy_user_test();
-       kasan_rcu_uaf();
-       kasan_workqueue_uaf();
-
-       kasan_restore_multi_shot(multishot);
-       return -EAGAIN;
-}
-
-module_init(test_kasan_module_init);
-MODULE_LICENSE("GPL");