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HTTP/2: fixed closed_nodes overflow (ticket #1708).
With large http2_max_concurrent_streams or http2_max_concurrent_pushes, more
than 255 ngx_http_v2_node_t structures might be allocated, eventually leading
to h2c->closed_nodes overflow when closing corresponding streams. This will
in turn result in additional allocations in ngx_http_v2_get_node_by_id().
While mostly harmless, it can result in excessive memory usage by a HTTP/2
connection, notably in configurations with many keepalive_requests allowed.
Fix is to use ngx_uint_t for h2c->closed_nodes instead of unsigned:8.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 03 Feb 2022 22:46:01 +0300 |
parents | 04ebf29eaf5b |
children |
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# Copyright (C) Nginx, Inc. if [ $USE_THREADS = YES ]; then if [ "$NGX_PLATFORM" = win32 ]; then cat << END $0: --with-threads is not supported on Windows END exit 1 fi have=NGX_THREADS . auto/have CORE_DEPS="$CORE_DEPS $THREAD_POOL_DEPS" CORE_SRCS="$CORE_SRCS $THREAD_POOL_SRCS" CORE_LIBS="$CORE_LIBS -lpthread" NGX_LIBPTHREAD="-lpthread" fi