Mercurial > hg > nginx
annotate src/core/ngx_radix_tree.h @ 6272:b6a665bf858a
HTTP/2: fix indirect reprioritization.
Previously, streams that were indirectly reprioritized (either because of
a new exclusive dependency on their parent or because of removal of their
parent from the dependency tree), didn't have their pointer to the parent
node updated.
This broke detection of circular dependencies and, as a result, nginx
worker would crash due to stack overflow whenever such dependency was
introduced.
Found with afl-fuzz.
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
author | Piotr Sikora <piotrsikora@google.com> |
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date | Thu, 01 Oct 2015 20:25:55 -0700 |
parents | 3be3de31d7dd |
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rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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8 #ifndef _NGX_RADIX_TREE_H_INCLUDED_ |
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9 #define _NGX_RADIX_TREE_H_INCLUDED_ |
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10 |
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11 |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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14 |
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15 |
485 | 16 #define NGX_RADIX_NO_VALUE (uintptr_t) -1 |
17 | |
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18 typedef struct ngx_radix_node_s ngx_radix_node_t; |
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19 |
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20 struct ngx_radix_node_s { |
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21 ngx_radix_node_t *right; |
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22 ngx_radix_node_t *left; |
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23 ngx_radix_node_t *parent; |
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24 uintptr_t value; |
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25 }; |
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26 |
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27 |
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28 typedef struct { |
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29 ngx_radix_node_t *root; |
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30 ngx_pool_t *pool; |
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31 ngx_radix_node_t *free; |
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32 char *start; |
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33 size_t size; |
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34 } ngx_radix_tree_t; |
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35 |
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36 |
487 | 37 ngx_radix_tree_t *ngx_radix_tree_create(ngx_pool_t *pool, |
489 | 38 ngx_int_t preallocate); |
4992 | 39 |
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40 ngx_int_t ngx_radix32tree_insert(ngx_radix_tree_t *tree, |
487 | 41 uint32_t key, uint32_t mask, uintptr_t value); |
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42 ngx_int_t ngx_radix32tree_delete(ngx_radix_tree_t *tree, |
487 | 43 uint32_t key, uint32_t mask); |
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44 uintptr_t ngx_radix32tree_find(ngx_radix_tree_t *tree, uint32_t key); |
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45 |
4992 | 46 #if (NGX_HAVE_INET6) |
47 ngx_int_t ngx_radix128tree_insert(ngx_radix_tree_t *tree, | |
48 u_char *key, u_char *mask, uintptr_t value); | |
49 ngx_int_t ngx_radix128tree_delete(ngx_radix_tree_t *tree, | |
50 u_char *key, u_char *mask); | |
51 uintptr_t ngx_radix128tree_find(ngx_radix_tree_t *tree, u_char *key); | |
52 #endif | |
53 | |
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54 |
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55 #endif /* _NGX_RADIX_TREE_H_INCLUDED_ */ |