Release 4.18 lib/list_debug.c
/*
* 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)
{
if (CHECK_DATA_CORRUPTION(next->prev != prev,
"list_add corruption. next->prev should be prev (%px), but was %px. (next=%px).\n",
prev, next->prev, next) ||
CHECK_DATA_CORRUPTION(prev->next != next,
"list_add corruption. prev->next should be next (%px), but was %px. (prev=%px).\n",
next, prev->next, prev) ||
CHECK_DATA_CORRUPTION(new == prev || new == next,
"list_add double add: new=%px, prev=%px, next=%px.\n",
new, prev, next))
return false;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Jones | 50 | 58.82% | 3 | 37.50% |
| Kees Cook | 16 | 18.82% | 3 | 37.50% |
| Chris Metcalf | 16 | 18.82% | 1 | 12.50% |
| Matthew Wilcox | 3 | 3.53% | 1 | 12.50% |
| Total | 85 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(__list_add_valid);
bool __list_del_entry_valid(struct list_head *entry)
{
struct list_head *prev, *next;
prev = entry->prev;
next = entry->next;
if (CHECK_DATA_CORRUPTION(next == LIST_POISON1,
"list_del corruption, %px->next is LIST_POISON1 (%px)\n",
entry, LIST_POISON1) ||
CHECK_DATA_CORRUPTION(prev == LIST_POISON2,
"list_del corruption, %px->prev is LIST_POISON2 (%px)\n",
entry, LIST_POISON2) ||
CHECK_DATA_CORRUPTION(prev->next != entry,
"list_del corruption. prev->next should be %px, but was %px\n",
entry, prev->next) ||
CHECK_DATA_CORRUPTION(next->prev != entry,
"list_del corruption. next->prev should be %px, but was %px\n",
entry, next->prev))
return false;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Jones | 37 | 37.76% | 2 | 25.00% |
| Linus Torvalds | 23 | 23.47% | 1 | 12.50% |
| Kees Cook | 18 | 18.37% | 3 | 37.50% |
| Baruch Siach | 16 | 16.33% | 1 | 12.50% |
| Matthew Wilcox | 4 | 4.08% | 1 | 12.50% |
| Total | 98 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(__list_del_entry_valid);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Jones | 103 | 49.05% | 4 | 26.67% |
| Kees Cook | 38 | 18.10% | 4 | 26.67% |
| Linus Torvalds | 23 | 10.95% | 1 | 6.67% |
| Baruch Siach | 16 | 7.62% | 1 | 6.67% |
| Chris Metcalf | 16 | 7.62% | 1 | 6.67% |
| Matthew Wilcox | 7 | 3.33% | 1 | 6.67% |
| Paul Gortmaker | 7 | 3.33% | 3 | 20.00% |
| Total | 210 | 100.00% | 15 | 100.00% |
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