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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Regression3
4 * Description:
5 * Helper radix_tree_iter_retry resets next_index to the current index.
6 * In following radix_tree_next_slot current chunk size becomes zero.
7 * This isn't checked and it tries to dereference null pointer in slot.
8 *
9 * Helper radix_tree_iter_resume reset slot to NULL and next_index to index + 1,
10 * for tagger iteraction it also must reset cached tags in iterator to abort
11 * next radix_tree_next_slot and go to slow-path into radix_tree_next_chunk.
12 *
13 * Running:
14 * This test should run to completion immediately. The above bug would
15 * cause it to segfault.
16 *
17 * Upstream commit:
18 * Not yet
19 */
20#include <linux/kernel.h>
21#include <linux/gfp.h>
22#include <linux/slab.h>
23#include <linux/radix-tree.h>
24#include <stdlib.h>
25#include <stdio.h>
26
27#include "regression.h"
28
29void regression3_test(void)
30{
31 RADIX_TREE(root, GFP_KERNEL);
32 void *ptr0 = (void *)4ul;
33 void *ptr = (void *)8ul;
34 struct radix_tree_iter iter;
35 void **slot;
36 bool first;
37
38 printv(1, "running regression test 3 (should take milliseconds)\n");
39
40 radix_tree_insert(&root, 0, ptr0);
41 radix_tree_tag_set(&root, 0, 0);
42
43 first = true;
44 radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
45 printv(2, "tagged %ld %p\n", iter.index, *slot);
46 if (first) {
47 radix_tree_insert(&root, 1, ptr);
48 radix_tree_tag_set(&root, 1, 0);
49 first = false;
50 }
51 if (radix_tree_deref_retry(*slot)) {
52 printv(2, "retry at %ld\n", iter.index);
53 slot = radix_tree_iter_retry(&iter);
54 continue;
55 }
56 }
57 radix_tree_delete(&root, 1);
58
59 first = true;
60 radix_tree_for_each_slot(slot, &root, &iter, 0) {
61 printv(2, "slot %ld %p\n", iter.index, *slot);
62 if (first) {
63 radix_tree_insert(&root, 1, ptr);
64 first = false;
65 }
66 if (radix_tree_deref_retry(*slot)) {
67 printv(2, "retry at %ld\n", iter.index);
68 slot = radix_tree_iter_retry(&iter);
69 continue;
70 }
71 }
72 radix_tree_delete(&root, 1);
73
74 first = true;
75 radix_tree_for_each_contig(slot, &root, &iter, 0) {
76 printv(2, "contig %ld %p\n", iter.index, *slot);
77 if (first) {
78 radix_tree_insert(&root, 1, ptr);
79 first = false;
80 }
81 if (radix_tree_deref_retry(*slot)) {
82 printv(2, "retry at %ld\n", iter.index);
83 slot = radix_tree_iter_retry(&iter);
84 continue;
85 }
86 }
87
88 radix_tree_for_each_slot(slot, &root, &iter, 0) {
89 printv(2, "slot %ld %p\n", iter.index, *slot);
90 if (!iter.index) {
91 printv(2, "next at %ld\n", iter.index);
92 slot = radix_tree_iter_resume(slot, &iter);
93 }
94 }
95
96 radix_tree_for_each_contig(slot, &root, &iter, 0) {
97 printv(2, "contig %ld %p\n", iter.index, *slot);
98 if (!iter.index) {
99 printv(2, "next at %ld\n", iter.index);
100 slot = radix_tree_iter_resume(slot, &iter);
101 }
102 }
103
104 radix_tree_tag_set(&root, 0, 0);
105 radix_tree_tag_set(&root, 1, 0);
106 radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
107 printv(2, "tagged %ld %p\n", iter.index, *slot);
108 if (!iter.index) {
109 printv(2, "next at %ld\n", iter.index);
110 slot = radix_tree_iter_resume(slot, &iter);
111 }
112 }
113
114 radix_tree_delete(&root, 0);
115 radix_tree_delete(&root, 1);
116
117 printv(1, "regression test 3 passed\n");
118}
1/*
2 * Regression3
3 * Description:
4 * Helper radix_tree_iter_retry resets next_index to the current index.
5 * In following radix_tree_next_slot current chunk size becomes zero.
6 * This isn't checked and it tries to dereference null pointer in slot.
7 *
8 * Helper radix_tree_iter_next reset slot to NULL and next_index to index + 1,
9 * for tagger iteraction it also must reset cached tags in iterator to abort
10 * next radix_tree_next_slot and go to slow-path into radix_tree_next_chunk.
11 *
12 * Running:
13 * This test should run to completion immediately. The above bug would
14 * cause it to segfault.
15 *
16 * Upstream commit:
17 * Not yet
18 */
19#include <linux/kernel.h>
20#include <linux/gfp.h>
21#include <linux/slab.h>
22#include <linux/radix-tree.h>
23#include <stdlib.h>
24#include <stdio.h>
25
26#include "regression.h"
27
28void regression3_test(void)
29{
30 RADIX_TREE(root, GFP_KERNEL);
31 void *ptr0 = (void *)4ul;
32 void *ptr = (void *)8ul;
33 struct radix_tree_iter iter;
34 void **slot;
35 bool first;
36
37 printf("running regression test 3 (should take milliseconds)\n");
38
39 radix_tree_insert(&root, 0, ptr0);
40 radix_tree_tag_set(&root, 0, 0);
41
42 first = true;
43 radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
44 printf("tagged %ld %p\n", iter.index, *slot);
45 if (first) {
46 radix_tree_insert(&root, 1, ptr);
47 radix_tree_tag_set(&root, 1, 0);
48 first = false;
49 }
50 if (radix_tree_deref_retry(*slot)) {
51 printf("retry at %ld\n", iter.index);
52 slot = radix_tree_iter_retry(&iter);
53 continue;
54 }
55 }
56 radix_tree_delete(&root, 1);
57
58 first = true;
59 radix_tree_for_each_slot(slot, &root, &iter, 0) {
60 printf("slot %ld %p\n", iter.index, *slot);
61 if (first) {
62 radix_tree_insert(&root, 1, ptr);
63 first = false;
64 }
65 if (radix_tree_deref_retry(*slot)) {
66 printk("retry at %ld\n", iter.index);
67 slot = radix_tree_iter_retry(&iter);
68 continue;
69 }
70 }
71 radix_tree_delete(&root, 1);
72
73 first = true;
74 radix_tree_for_each_contig(slot, &root, &iter, 0) {
75 printk("contig %ld %p\n", iter.index, *slot);
76 if (first) {
77 radix_tree_insert(&root, 1, ptr);
78 first = false;
79 }
80 if (radix_tree_deref_retry(*slot)) {
81 printk("retry at %ld\n", iter.index);
82 slot = radix_tree_iter_retry(&iter);
83 continue;
84 }
85 }
86
87 radix_tree_for_each_slot(slot, &root, &iter, 0) {
88 printf("slot %ld %p\n", iter.index, *slot);
89 if (!iter.index) {
90 printf("next at %ld\n", iter.index);
91 slot = radix_tree_iter_next(&iter);
92 }
93 }
94
95 radix_tree_for_each_contig(slot, &root, &iter, 0) {
96 printf("contig %ld %p\n", iter.index, *slot);
97 if (!iter.index) {
98 printf("next at %ld\n", iter.index);
99 slot = radix_tree_iter_next(&iter);
100 }
101 }
102
103 radix_tree_tag_set(&root, 0, 0);
104 radix_tree_tag_set(&root, 1, 0);
105 radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
106 printf("tagged %ld %p\n", iter.index, *slot);
107 if (!iter.index) {
108 printf("next at %ld\n", iter.index);
109 slot = radix_tree_iter_next(&iter);
110 }
111 }
112
113 radix_tree_delete(&root, 0);
114 radix_tree_delete(&root, 1);
115
116 printf("regression test 3 passed\n");
117}