Mercurial > hg > nginx
view src/mail/ngx_mail_pop3_module.h @ 6957:83bae3d354ab
HTTP/2: fixed connection finalization.
All streams in connection must be finalized before the connection
itself can be finalized and all related memory is freed. That's
not always possible on the current event loop iteration.
Thus when the last stream is finalized, it sets the special read
event handler ngx_http_v2_handle_connection_handler() and posts
the event.
Previously, this handler didn't check the connection state and
could call the regular event handler on a connection that was
already in finalization stage. In the worst case that could
lead to a segmentation fault, since some data structures aren't
supposed to be used during connection finalization. Particularly,
the waiting queue can contain already freed streams, so the
WINDOW_UPDATE frame received by that moment could trigger
accessing to these freed streams.
Now, the connection error flag is explicitly checked in
ngx_http_v2_handle_connection_handler().
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Wed, 29 Mar 2017 20:21:01 +0300 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_MAIL_POP3_MODULE_H_INCLUDED_ #define _NGX_MAIL_POP3_MODULE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_mail.h> typedef struct { ngx_str_t capability; ngx_str_t starttls_capability; ngx_str_t starttls_only_capability; ngx_str_t auth_capability; ngx_uint_t auth_methods; ngx_array_t capabilities; } ngx_mail_pop3_srv_conf_t; void ngx_mail_pop3_init_session(ngx_mail_session_t *s, ngx_connection_t *c); void ngx_mail_pop3_init_protocol(ngx_event_t *rev); void ngx_mail_pop3_auth_state(ngx_event_t *rev); ngx_int_t ngx_mail_pop3_parse_command(ngx_mail_session_t *s); extern ngx_module_t ngx_mail_pop3_module; #endif /* _NGX_MAIL_POP3_MODULE_H_INCLUDED_ */