58 lines
2.3 KiB
Diff
58 lines
2.3 KiB
Diff
From 134e28ae5abc997fe064995627b3ebe247a5d5d8 Mon Sep 17 00:00:00 2001
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From: Stefan Eissing <stefan@eissing.org>
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Date: Fri, 23 Feb 2024 15:13:56 +0100
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Subject: [PATCH] RESET stream after 100 failed incoming headers
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---
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mod_http2/h2_session.c | 10 +++++++---
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mod_http2/h2_stream.c | 1 +
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mod_http2/h2_stream.h | 1 +
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3 files changed, 9 insertions(+), 3 deletions(-)
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diff --git a/mod_http2/h2_session.c b/mod_http2/h2_session.c
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index 1e560e47..6d379cc5 100644
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--- a/mod_http2/h2_session.c
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+++ b/mod_http2/h2_session.c
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@@ -319,9 +319,13 @@ static int on_header_cb(nghttp2_session *ngh2, const nghttp2_frame *frame,
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status = h2_stream_add_header(stream, (const char *)name, namelen,
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(const char *)value, valuelen);
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- if (status != APR_SUCCESS
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- && (!stream->rtmp
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- || stream->rtmp->http_status == H2_HTTP_STATUS_UNSET)) {
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+ if (status != APR_SUCCESS &&
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+ (!stream->rtmp ||
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+ stream->rtmp->http_status == H2_HTTP_STATUS_UNSET ||
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+ /* We accept a certain amount of failures in order to reply
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+ * with an informative HTTP error response like 413. But of the
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+ * client is too wrong, we fail the request an RESET the stream */
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+ stream->request_headers_failed > 100)) {
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return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
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}
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return 0;
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diff --git a/mod_http2/h2_stream.c b/mod_http2/h2_stream.c
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index f6c92024..ee87555f 100644
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--- a/mod_http2/h2_stream.c
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+++ b/mod_http2/h2_stream.c
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@@ -813,6 +813,7 @@ apr_status_t h2_stream_add_header(h2_stream *stream,
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cleanup:
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if (error) {
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+ ++stream->request_headers_failed;
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set_error_response(stream, error);
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return APR_EINVAL;
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}
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diff --git a/mod_http2/h2_stream.h b/mod_http2/h2_stream.h
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index d68d4260..405978a4 100644
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--- a/mod_http2/h2_stream.h
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+++ b/mod_http2/h2_stream.h
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@@ -91,6 +91,7 @@ struct h2_stream {
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struct h2_request *rtmp; /* request being assembled */
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apr_table_t *trailers_in; /* optional, incoming trailers */
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int request_headers_added; /* number of request headers added */
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+ int request_headers_failed; /* number of request headers failed to add */
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#if AP_HAS_RESPONSE_BUCKETS
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ap_bucket_response *response; /* the final, non-interim response or NULL */
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