Mercurial > hg > nginx-quic
view src/os/win32/ngx_process_cycle.h @ 7400:be5cb9c67c05
Mp4: fixed possible pointer overflow on 32-bit platforms.
On 32-bit platforms mp4->buffer_pos might overflow when a large
enough (close to 4 gigabytes) atom is being skipped, resulting in
incorrect memory addesses being read further in the code. In most
cases this results in harmless errors being logged, though may also
result in a segmentation fault if hitting unmapped pages.
To address this, ngx_mp4_atom_next() now only increments mp4->buffer_pos
up to mp4->buffer_end. This ensures that overflow cannot happen.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 21 Nov 2018 20:23:16 +0300 |
parents | b4cc553aafeb |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_PROCESS_CYCLE_H_INCLUDED_ #define _NGX_PROCESS_CYCLE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_PROCESS_SINGLE 0 #define NGX_PROCESS_MASTER 1 #define NGX_PROCESS_SIGNALLER 2 #define NGX_PROCESS_WORKER 3 void ngx_master_process_cycle(ngx_cycle_t *cycle); void ngx_single_process_cycle(ngx_cycle_t *cycle); void ngx_close_handle(HANDLE h); extern ngx_uint_t ngx_process; extern ngx_uint_t ngx_worker; extern ngx_pid_t ngx_pid; extern ngx_uint_t ngx_exiting; extern sig_atomic_t ngx_quit; extern sig_atomic_t ngx_terminate; extern sig_atomic_t ngx_reopen; extern ngx_uint_t ngx_inherited; extern ngx_pid_t ngx_new_binary; extern HANDLE ngx_master_process_event; extern char ngx_master_process_event_name[]; #endif /* _NGX_PROCESS_CYCLE_H_INCLUDED_ */