/* Inject a hwpoison memory failure on a arbitary pfn */ #include <linux/module.h> #include <linux/debugfs.h> #include <linux/kernel.h> #include <linux/mm.h> static struct dentry *hwpoison_dir, *corrupt_pfn; static int hwpoison_inject(void *data, u64 val) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; printk(KERN_INFO "Injecting memory failure at pfn %Lx\n", val); return __memory_failure(val, 18, 0); } DEFINE_SIMPLE_ATTRIBUTE(hwpoison_fops, NULL, hwpoison_inject, "%lli\n"); static void pfn_inject_exit(void) { if (hwpoison_dir) debugfs_remove_recursive(hwpoison_dir); } static int pfn_inject_init(void) { hwpoison_dir = debugfs_create_dir("hwpoison", NULL); if (hwpoison_dir == NULL) return -ENOMEM; corrupt_pfn = debugfs_create_file("corrupt-pfn", 0600, hwpoison_dir, NULL, &hwpoison_fops); if (corrupt_pfn == NULL) { pfn_inject_exit(); return -ENOMEM; } return 0; } module_init(pfn_inject_init); module_exit(pfn_inject_exit); MODULE_LICENSE("GPL");