blob: 7f7bfa55eb6df3e9c9c3c2a244ff02d475197e9d [file] [log] [blame]
* Copyright 2006, Red Hat, Inc., Dave Jones
* Released under the General Public License (GPL).
* This file contains the linked list validation for DEBUG_LIST.
#include <linux/export.h>
#include <linux/list.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/rculist.h>
* Check that the data structures for the list manipulations are reasonably
* valid. Failures here indicate memory corruption (and possibly an exploit
* attempt).
bool __list_add_valid(struct list_head *new, struct list_head *prev,
struct list_head *next)
CHECK_DATA_CORRUPTION(next->prev != prev,
"list_add corruption. next->prev should be prev (%p), but was %p. (next=%p).\n",
prev, next->prev, next);
CHECK_DATA_CORRUPTION(prev->next != next,
"list_add corruption. prev->next should be next (%p), but was %p. (prev=%p).\n",
next, prev->next, prev);
CHECK_DATA_CORRUPTION(new == prev || new == next,
"list_add double add: new=%p, prev=%p, next=%p.\n",
new, prev, next);
return true;
bool __list_del_entry_valid(struct list_head *entry)
struct list_head *prev, *next;
prev = entry->prev;
next = entry->next;
"list_del corruption, %p->next is LIST_POISON1 (%p)\n",
entry, LIST_POISON1);
"list_del corruption, %p->prev is LIST_POISON2 (%p)\n",
entry, LIST_POISON2);
CHECK_DATA_CORRUPTION(prev->next != entry,
"list_del corruption. prev->next should be %p, but was %p\n",
entry, prev->next);
CHECK_DATA_CORRUPTION(next->prev != entry,
"list_del corruption. next->prev should be %p, but was %p\n",
entry, next->prev);
return true;