Mercurial > hg > nginx
annotate src/core/ngx_list.h @ 7354:1812f1d79d84
Fixed socket leak with "return 444" in error_page (ticket #274).
Socket leak was observed in the following configuration:
error_page 400 = /close;
location = /close {
return 444;
}
The problem is that "return 444" triggers termination of the request,
and due to error_page termination thinks that it needs to use a posted
request to clear stack. But at the early request processing where 400
errors are generated there are no ngx_http_run_posted_requests() calls,
so the request is only terminated after an external event.
Variants of the problem include "error_page 497" instead (ticket #695)
and various other errors generated during early request processing
(405, 414, 421, 494, 495, 496, 501, 505).
The same problem can be also triggered with "return 499" and "return 408"
as both codes trigger ngx_http_terminate_request(), much like "return 444".
To fix this, the patch adds ngx_http_run_posted_requests() calls to
ngx_http_process_request_line() and ngx_http_process_request_headers()
functions, and to ngx_http_v2_run_request() and ngx_http_v2_push_stream()
functions in HTTP/2.
Since the ngx_http_process_request() function is now only called via
other functions which call ngx_http_run_posted_requests(), the call
there is no longer needed and was removed.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Fri, 21 Sep 2018 15:59:30 +0300 |
parents | d620f497c50f |
children |
rev | line source |
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441
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1 |
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2 /* |
444
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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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7 |
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8 #ifndef _NGX_LIST_H_INCLUDED_ |
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9 #define _NGX_LIST_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 |
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16 typedef struct ngx_list_part_s ngx_list_part_t; |
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17 |
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18 struct ngx_list_part_s { |
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19 void *elts; |
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20 ngx_uint_t nelts; |
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21 ngx_list_part_t *next; |
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22 }; |
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23 |
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24 |
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25 typedef struct { |
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26 ngx_list_part_t *last; |
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27 ngx_list_part_t part; |
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28 size_t size; |
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29 ngx_uint_t nalloc; |
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30 ngx_pool_t *pool; |
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31 } ngx_list_t; |
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32 |
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33 |
766 | 34 ngx_list_t *ngx_list_create(ngx_pool_t *pool, ngx_uint_t n, size_t size); |
35 | |
36 static ngx_inline ngx_int_t | |
37 ngx_list_init(ngx_list_t *list, ngx_pool_t *pool, ngx_uint_t n, size_t size) | |
415
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38 { |
501 | 39 list->part.elts = ngx_palloc(pool, n * size); |
40 if (list->part.elts == NULL) { | |
415
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41 return NGX_ERROR; |
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42 } |
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43 |
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44 list->part.nelts = 0; |
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45 list->part.next = NULL; |
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46 list->last = &list->part; |
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47 list->size = size; |
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48 list->nalloc = n; |
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49 list->pool = pool; |
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50 |
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51 return NGX_OK; |
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52 } |
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53 |
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54 |
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55 /* |
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56 * |
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57 * the iteration through the list: |
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58 * |
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59 * part = &list.part; |
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60 * data = part->elts; |
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61 * |
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62 * for (i = 0 ;; i++) { |
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63 * |
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64 * if (i >= part->nelts) { |
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65 * if (part->next == NULL) { |
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66 * break; |
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67 * } |
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68 * |
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69 * part = part->next; |
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70 * data = part->elts; |
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71 * i = 0; |
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72 * } |
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73 * |
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74 * ... data[i] ... |
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75 * |
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76 * } |
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77 */ |
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78 |
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79 |
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80 void *ngx_list_push(ngx_list_t *list); |
414
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81 |
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82 |
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83 #endif /* _NGX_LIST_H_INCLUDED_ */ |