Mercurial > hg > nginx-quic
diff src/event/ngx_event_openssl.c @ 8732:0601a4e793bf stable-1.20
SSL: ngx_ssl_shutdown() rework.
Instead of calling SSL_free() with each return point, introduced a single
place where cleanup happens. As a positive side effect, this fixes two
potential memory leaks on ngx_handle_read_event() and ngx_handle_write_event()
errors where there were no SSL_free() calls (though unlikely practical,
as errors there are only expected to happen due to bugs or kernel issues).
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 01 Jun 2021 17:37:49 +0300 |
parents | 51e6a665523c |
children | 5f765427c17a |
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--- a/src/event/ngx_event_openssl.c +++ b/src/event/ngx_event_openssl.c @@ -2896,9 +2896,12 @@ ngx_int_t ngx_ssl_shutdown(ngx_connection_t *c) { int n, sslerr, mode; + ngx_int_t rc; ngx_err_t err; ngx_uint_t tries; + rc = NGX_OK; + ngx_ssl_ocsp_cleanup(c); if (SSL_in_init(c->ssl->connection)) { @@ -2908,11 +2911,7 @@ ngx_ssl_shutdown(ngx_connection_t *c) * Avoid calling SSL_shutdown() if handshake wasn't completed. */ - SSL_free(c->ssl->connection); - c->ssl = NULL; - c->recv = ngx_recv; - - return NGX_OK; + goto done; } if (c->timedout || c->error || c->buffered) { @@ -2954,11 +2953,7 @@ ngx_ssl_shutdown(ngx_connection_t *c) ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_shutdown: %d", n); if (n == 1) { - SSL_free(c->ssl->connection); - c->ssl = NULL; - c->recv = ngx_recv; - - return NGX_OK; + goto done; } if (n == 0 && tries-- > 1) { @@ -2984,11 +2979,11 @@ ngx_ssl_shutdown(ngx_connection_t *c) } if (ngx_handle_read_event(c->read, 0) != NGX_OK) { - return NGX_ERROR; + goto failed; } if (ngx_handle_write_event(c->write, 0) != NGX_OK) { - return NGX_ERROR; + goto failed; } ngx_add_timer(c->read, 3000); @@ -2997,23 +2992,27 @@ ngx_ssl_shutdown(ngx_connection_t *c) } if (sslerr == SSL_ERROR_ZERO_RETURN || ERR_peek_error() == 0) { - SSL_free(c->ssl->connection); - c->ssl = NULL; - c->recv = ngx_recv; - - return NGX_OK; + goto done; } err = (sslerr == SSL_ERROR_SYSCALL) ? ngx_errno : 0; ngx_ssl_connection_error(c, sslerr, err, "SSL_shutdown() failed"); - SSL_free(c->ssl->connection); - c->ssl = NULL; - c->recv = ngx_recv; - - return NGX_ERROR; - } + break; + } + +failed: + + rc = NGX_ERROR; + +done: + + SSL_free(c->ssl->connection); + c->ssl = NULL; + c->recv = ngx_recv; + + return rc; }