Mercurial > hg > nginx
view src/http/ngx_http.h @ 4964:2464ccebdb52
Upstream: fixed SIGSEGV with the "if" directive.
Configuration like
location / {
set $true 1;
if ($true) {
proxy_pass http://backend;
}
if ($true) {
# nothing
}
}
resulted in segmentation fault due to NULL pointer dereference as the
upstream configuration wasn't initialized in an implicit location created
by the last if(), but the r->content_handler was set due to first if().
Instead of committing a suicide by dereferencing a NULL pointer, return
500 (Internal Server Error) in such cases, i.e. if uscf is NULL. Better
fix would be to avoid such cases by fixing the "if" directive handling,
but it's out of scope of this patch.
Prodded by Piotr Sikora.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 13 Dec 2012 16:05:59 +0000 |
parents | 32030fa8cb14 |
children | fd84344f1df7 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_HTTP_H_INCLUDED_ #define _NGX_HTTP_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> typedef struct ngx_http_request_s ngx_http_request_t; typedef struct ngx_http_upstream_s ngx_http_upstream_t; typedef struct ngx_http_cache_s ngx_http_cache_t; typedef struct ngx_http_file_cache_s ngx_http_file_cache_t; typedef struct ngx_http_log_ctx_s ngx_http_log_ctx_t; typedef struct ngx_http_chunked_s ngx_http_chunked_t; typedef ngx_int_t (*ngx_http_header_handler_pt)(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); typedef u_char *(*ngx_http_log_handler_pt)(ngx_http_request_t *r, ngx_http_request_t *sr, u_char *buf, size_t len); #include <ngx_http_variables.h> #include <ngx_http_request.h> #include <ngx_http_upstream.h> #include <ngx_http_upstream_round_robin.h> #include <ngx_http_config.h> #include <ngx_http_busy_lock.h> #include <ngx_http_script.h> #include <ngx_http_core_module.h> #if (NGX_HTTP_CACHE) #include <ngx_http_cache.h> #endif #if (NGX_HTTP_SSI) #include <ngx_http_ssi_filter_module.h> #endif #if (NGX_HTTP_SSL) #include <ngx_http_ssl_module.h> #endif struct ngx_http_log_ctx_s { ngx_connection_t *connection; ngx_http_request_t *request; ngx_http_request_t *current_request; }; struct ngx_http_chunked_s { ngx_uint_t state; off_t size; off_t length; }; typedef struct { ngx_uint_t http_version; ngx_uint_t code; ngx_uint_t count; u_char *start; u_char *end; } ngx_http_status_t; #define ngx_http_get_module_ctx(r, module) (r)->ctx[module.ctx_index] #define ngx_http_set_ctx(r, c, module) r->ctx[module.ctx_index] = c; ngx_int_t ngx_http_add_location(ngx_conf_t *cf, ngx_queue_t **locations, ngx_http_core_loc_conf_t *clcf); ngx_int_t ngx_http_add_listen(ngx_conf_t *cf, ngx_http_core_srv_conf_t *cscf, ngx_http_listen_opt_t *lsopt); void ngx_http_init_connection(ngx_connection_t *c); #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME int ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg); #endif ngx_int_t ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b); ngx_int_t ngx_http_parse_complex_uri(ngx_http_request_t *r, ngx_uint_t merge_slashes); ngx_int_t ngx_http_parse_status_line(ngx_http_request_t *r, ngx_buf_t *b, ngx_http_status_t *status); ngx_int_t ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri, ngx_str_t *args, ngx_uint_t *flags); ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b, ngx_uint_t allow_underscores); ngx_int_t ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name, ngx_str_t *value); ngx_int_t ngx_http_arg(ngx_http_request_t *r, u_char *name, size_t len, ngx_str_t *value); void ngx_http_split_args(ngx_http_request_t *r, ngx_str_t *uri, ngx_str_t *args); ngx_int_t ngx_http_parse_chunked(ngx_http_request_t *r, ngx_buf_t *b, ngx_http_chunked_t *ctx); ngx_int_t ngx_http_find_server_conf(ngx_http_request_t *r); void ngx_http_update_location_config(ngx_http_request_t *r); void ngx_http_handler(ngx_http_request_t *r); void ngx_http_run_posted_requests(ngx_connection_t *c); ngx_int_t ngx_http_post_request(ngx_http_request_t *r, ngx_http_posted_request_t *pr); void ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc); void ngx_http_empty_handler(ngx_event_t *wev); void ngx_http_request_empty_handler(ngx_http_request_t *r); #define ngx_http_ephemeral(r) (void *) (&r->uri_start) #define NGX_HTTP_LAST 1 #define NGX_HTTP_FLUSH 2 ngx_int_t ngx_http_send_special(ngx_http_request_t *r, ngx_uint_t flags); ngx_int_t ngx_http_read_client_request_body(ngx_http_request_t *r, ngx_http_client_body_handler_pt post_handler); ngx_int_t ngx_http_send_header(ngx_http_request_t *r); ngx_int_t ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error); ngx_int_t ngx_http_filter_finalize_request(ngx_http_request_t *r, ngx_module_t *m, ngx_int_t error); void ngx_http_clean_header(ngx_http_request_t *r); time_t ngx_http_parse_time(u_char *value, size_t len); size_t ngx_http_get_time(char *buf, time_t t); ngx_int_t ngx_http_discard_request_body(ngx_http_request_t *r); void ngx_http_discarded_request_body_handler(ngx_http_request_t *r); void ngx_http_block_reading(ngx_http_request_t *r); void ngx_http_test_reading(ngx_http_request_t *r); char *ngx_http_types_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); char *ngx_http_merge_types(ngx_conf_t *cf, ngx_array_t **keys, ngx_hash_t *types_hash, ngx_array_t **prev_keys, ngx_hash_t *prev_types_hash, ngx_str_t *default_types); ngx_int_t ngx_http_set_default_types(ngx_conf_t *cf, ngx_array_t **types, ngx_str_t *default_type); #if (NGX_HTTP_DEGRADATION) ngx_uint_t ngx_http_degraded(ngx_http_request_t *); #endif extern ngx_module_t ngx_http_module; extern ngx_str_t ngx_http_html_default_types[]; extern ngx_http_output_header_filter_pt ngx_http_top_header_filter; extern ngx_http_output_body_filter_pt ngx_http_top_body_filter; #endif /* _NGX_HTTP_H_INCLUDED_ */