Mercurial > hg > nginx-quic
annotate src/core/ngx_palloc.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 | ef935cd7ed8d |
children |
rev | line source |
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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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8 #ifndef _NGX_PALLOC_H_INCLUDED_ |
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9 #define _NGX_PALLOC_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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16 /* |
589 | 17 * NGX_MAX_ALLOC_FROM_POOL should be (ngx_pagesize - 1), i.e. 4095 on x86. |
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18 * On Windows NT it decreases a number of locked pages in a kernel. |
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19 */ |
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20 #define NGX_MAX_ALLOC_FROM_POOL (ngx_pagesize - 1) |
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21 |
1200 | 22 #define NGX_DEFAULT_POOL_SIZE (16 * 1024) |
3388 | 23 |
24 #define NGX_POOL_ALIGNMENT 16 | |
1200 | 25 #define NGX_MIN_POOL_SIZE \ |
3388 | 26 ngx_align((sizeof(ngx_pool_t) + 2 * sizeof(ngx_pool_large_t)), \ |
27 NGX_POOL_ALIGNMENT) | |
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29 |
509 | 30 typedef void (*ngx_pool_cleanup_pt)(void *data); |
31 | |
32 typedef struct ngx_pool_cleanup_s ngx_pool_cleanup_t; | |
33 | |
34 struct ngx_pool_cleanup_s { | |
35 ngx_pool_cleanup_pt handler; | |
36 void *data; | |
37 ngx_pool_cleanup_t *next; | |
38 }; | |
39 | |
40 | |
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41 typedef struct ngx_pool_large_s ngx_pool_large_t; |
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42 |
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43 struct ngx_pool_large_s { |
509 | 44 ngx_pool_large_t *next; |
45 void *alloc; | |
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46 }; |
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48 |
2049 | 49 typedef struct { |
509 | 50 u_char *last; |
51 u_char *end; | |
2049 | 52 ngx_pool_t *next; |
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53 ngx_uint_t failed; |
2049 | 54 } ngx_pool_data_t; |
55 | |
56 | |
57 struct ngx_pool_s { | |
58 ngx_pool_data_t d; | |
59 size_t max; | |
581 | 60 ngx_pool_t *current; |
509 | 61 ngx_chain_t *chain; |
62 ngx_pool_large_t *large; | |
63 ngx_pool_cleanup_t *cleanup; | |
64 ngx_log_t *log; | |
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65 }; |
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67 |
509 | 68 typedef struct { |
69 ngx_fd_t fd; | |
70 u_char *name; | |
71 ngx_log_t *log; | |
72 } ngx_pool_cleanup_file_t; | |
73 | |
74 | |
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75 ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log); |
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76 void ngx_destroy_pool(ngx_pool_t *pool); |
2337 | 77 void ngx_reset_pool(ngx_pool_t *pool); |
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78 |
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79 void *ngx_palloc(ngx_pool_t *pool, size_t size); |
2049 | 80 void *ngx_pnalloc(ngx_pool_t *pool, size_t size); |
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81 void *ngx_pcalloc(ngx_pool_t *pool, size_t size); |
2129 | 82 void *ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment); |
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83 ngx_int_t ngx_pfree(ngx_pool_t *pool, void *p); |
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85 |
563 | 86 ngx_pool_cleanup_t *ngx_pool_cleanup_add(ngx_pool_t *p, size_t size); |
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87 void ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd); |
509 | 88 void ngx_pool_cleanup_file(void *data); |
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89 void ngx_pool_delete_file(void *data); |
509 | 90 |
91 | |
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92 #endif /* _NGX_PALLOC_H_INCLUDED_ */ |