19dfeba86b
When an invalid TLS configuration is applied (such as the conf_commands feature), nxt_cert_store_get() creates a buffer to send a certificate request to the main process and adds its default completion handler to an asynchronous queue to free the allocated buffer. However, if configuration fails, nxt_router_conf_error() removes the memory pool used to allocate the buffer, causing a crash when the completion handler is dispatched. Assertion "src/nxt_buf.c:208 assertion failed: data == b->parent" is triggered when is NXT_DEBUG enabled in the configure script. This patch uses a reference counter to retain the memory pool and redefines the completion handler to free the buffer before releasing the memory pool.
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